Ejemplo n.º 1
0
Archivo: moldy.py Proyecto: shrx/moldy
class MainWidget(QWidget):
    def __init__(self):
        QWidget.__init__(self)

        # define periodic table widget for element selection
        self.periodicTableWidget = widgets.PeriodicTableDialog()

        # initial molecule Zmatrix (can be empty)
        # self.inp = []
        self.inp = [['H'],
        ['O', 1, 0.9],
        ['O', 2, 1.4, 1, 105.],
        ['H', 3, 0.9, 2, 105., 1, 120.]]

        self.atomList = []
        self.highList = []
        self.labelList = []
        self.fast = False

        # define & initialize ZMatModel that will contain Zmatrix data
        self.ZMatModel = QStandardItemModel(len(self.inp), 7, self)
        self.ZMatTable = QTableView(self)
        self.ZMatTable.setModel(self.ZMatModel)
        self.ZMatTable.setFixedWidth(325)
        #self.ZMatTable.installEventFilter(self)
        #self.ZMatModel.installEventFilter(self)
        self.ZMatModel.setHorizontalHeaderLabels(['atom','','bond','','angle','','dihedral'])
        for j, width in enumerate([40, 22, 65, 22, 65, 22, 65]):
            self.ZMatTable.setColumnWidth(j, width)
        # populate the ZMatModel
        self.populateZMatModel()

        #define Menu bar menus and their actions
        self.menuBar = QMenuBar(self)
        fileMenu = self.menuBar.addMenu('&File')
        editMenu = self.menuBar.addMenu('&Edit')
        viewMenu = self.menuBar.addMenu('&View')
        measureMenu = self.menuBar.addMenu('&Measure')
        helpMenu = self.menuBar.addMenu('&Help')

        readZmatAction = QAction('&Read &ZMat', self)
        readZmatAction.setShortcut('Ctrl+O')
        readZmatAction.setStatusTip('Read Zmat from file')
        readZmatAction.triggered.connect(self.readZmat)
        fileMenu.addAction(readZmatAction)

        readXYZAction = QAction('&Read &XYZ', self)
        readXYZAction.setShortcut('Ctrl+Shift+O')
        readXYZAction.setStatusTip('Read XYZ from file')
        readXYZAction.triggered.connect(self.readXYZ)
        fileMenu.addAction(readXYZAction)

        readGaussianAction = QAction('&Read &Gaussian log', self)
        readGaussianAction.setShortcut('Ctrl+G')
        readGaussianAction.setStatusTip('Read Gaussian log file')
        readGaussianAction.triggered.connect(self.readGaussian)
        fileMenu.addAction(readGaussianAction)

        writeZmatAction = QAction('&Write &ZMat', self)
        writeZmatAction.setShortcut('Ctrl+S')
        writeZmatAction.setStatusTip('Write Zmat to file')
        writeZmatAction.triggered.connect(self.writeZmat)
        fileMenu.addAction(writeZmatAction)

        writeXYZAction = QAction('&Write &XYZ', self)
        writeXYZAction.setShortcut('Ctrl+Shift+S')
        writeXYZAction.setStatusTip('Write XYZ from file')
        writeXYZAction.triggered.connect(self.writeXYZ)
        fileMenu.addAction(writeXYZAction)

        exitAction = QAction('&Exit', self)
        exitAction.setShortcut('Ctrl+Q')
        exitAction.setStatusTip('Exit application')
        exitAction.triggered.connect(qApp.quit)
        fileMenu.addAction(exitAction)

        addRowAction = QAction('&Add &row', self)
        addRowAction.setShortcut('Ctrl+R')
        addRowAction.setStatusTip('Add row to ZMatrix')
        addRowAction.triggered.connect(self.addRow)
        editMenu.addAction(addRowAction)

        deleteRowAction = QAction('&Delete &row', self)
        deleteRowAction.setShortcut('Ctrl+Shift+R')
        deleteRowAction.setStatusTip('Delete row from ZMatrix')
        deleteRowAction.triggered.connect(self.deleteRow)
        editMenu.addAction(deleteRowAction)

        addAtomAction = QAction('&Add &atom', self)
        addAtomAction.setShortcut('Ctrl+A')
        addAtomAction.setStatusTip('Add atom to ZMatrix')
        addAtomAction.triggered.connect(self.buildB)
        editMenu.addAction(addAtomAction)

        drawModeMenu = QMenu('Draw mode', self)
        viewMenu.addMenu(drawModeMenu)
        fastDrawAction = QAction('&Fast draw', self)
        fastDrawAction.triggered.connect(self.fastDraw)
        normalDrawAction = QAction('&Normal draw', self)
        normalDrawAction.triggered.connect(self.normalDraw)
        drawModeMenu.addAction(normalDrawAction)
        drawModeMenu.addAction(fastDrawAction)

        clearHighlightsAction = QAction('&Clear selection', self)
        clearHighlightsAction.setShortcut('Ctrl+C')
        clearHighlightsAction.setStatusTip('Clear highlighted atoms')
        clearHighlightsAction.triggered.connect(self.clearHighlights)
        viewMenu.addAction(clearHighlightsAction)

        clearLabelsAction = QAction('&Clear labels', self)
        clearLabelsAction.setShortcut('Ctrl+Alt+C')
        clearLabelsAction.setStatusTip('Clear labels')
        clearLabelsAction.triggered.connect(self.clearLabels)
        viewMenu.addAction(clearLabelsAction)

        clearUpdateViewAction = QAction('&Clear selection and labels', self)
        clearUpdateViewAction.setShortcut('Ctrl+Shift+C')
        clearUpdateViewAction.setStatusTip('Clear highlighted atoms and labels')
        clearUpdateViewAction.triggered.connect(self.clearUpdateView)
        viewMenu.addAction(clearUpdateViewAction)

        self.showGaussAction = QAction('Show &Gaussian geometry optimization', self)
        self.showGaussAction.setShortcut('Ctrl+G')
        self.showGaussAction.setStatusTip('Show Gaussian geometry optimization plots for energy, force and displacement.')
        self.showGaussAction.setEnabled(False)
        self.showGaussAction.triggered.connect(self.showGauss)
        viewMenu.addAction(self.showGaussAction)
        self.showFreqAction = QAction('Show &IR frequency plot', self)
        self.showFreqAction.setShortcut('Ctrl+I')
        self.showFreqAction.setStatusTip('Show Gaussian calculated IR frequency plot.')
        self.showFreqAction.setEnabled(False)
        self.showFreqAction.triggered.connect(self.showFreq)
        viewMenu.addAction(self.showFreqAction)

        measureDistanceAction = QAction('&Measure &distance', self)
        measureDistanceAction.setShortcut('Ctrl+D')
        measureDistanceAction.setStatusTip('Measure distance between two atoms')
        measureDistanceAction.triggered.connect(self.measureDistanceB)
        measureMenu.addAction(measureDistanceAction)

        measureAngleAction = QAction('&Measure &angle', self)
        measureAngleAction.setShortcut('Ctrl+Shift+D')
        measureAngleAction.setStatusTip('Measure angle between three atoms')
        measureAngleAction.triggered.connect(self.measureAngleB)
        measureMenu.addAction(measureAngleAction)

        aboutAction = QAction('&About', self)
        aboutAction.setStatusTip('About this program...')
        aboutAction.triggered.connect(self.about)
        helpMenu.addAction(aboutAction)

        aboutQtAction = QAction('&About Qt', self)
        aboutQtAction.setStatusTip('About Qt...')
        aboutQtAction.triggered.connect(self.aboutQt)
        helpMenu.addAction(aboutQtAction)

        # define GL widget that displays the 3D molecule model
        self.window = widgets.MyGLView()
        self.window.installEventFilter(self)
        self.window.setMinimumSize(500, 500)
        #self.window.setBackgroundColor((50, 0, 10))
        self.updateView()

        self.gaussianPlot = GraphicsLayoutWidget()
        self.gaussianPlot.resize(750, 250)
        self.gaussianPlot.setWindowTitle('Gaussian geometry optimization')
        #self.gaussianPlot.setAspectLocked(True)
        #self.gaussianPlot.addLayout(rowspan=3, colspan=1)

        self.FreqModel = QStandardItemModel(1, 3, self)
        self.freqTable = QTableView(self)
        self.freqTable.setModel(self.FreqModel)
        self.freqTable.setMinimumWidth(240)
        self.freqTable.installEventFilter(self)
        self.FreqModel.installEventFilter(self)
        self.FreqModel.setHorizontalHeaderLabels(['Frequency','IR Intensity','Raman Intensity'])
        for j, width in enumerate([80, 80, 80]):
            self.freqTable.setColumnWidth(j, width)

        self.freqWidget = QWidget()
        self.freqWidget.setWindowTitle('IR frequency plot & table')
        self.freqWidget.resize(800, 400)
        self.freqWidget.layout = QHBoxLayout(self.freqWidget)
        self.freqWidget.layout.setSpacing(1)
        self.freqWidget.layout.setContentsMargins(1, 1, 1, 1)
        self.freqPlot = GraphicsLayoutWidget()
        self.freqWidget.layout.addWidget(self.freqPlot)
        self.freqWidget.layout.addWidget(self.freqTable)
        self.freqTable.clicked.connect(self.freqCellClicked)

        # define other application parts
        self.statusBar = QStatusBar(self)
        self.fileDialog = QFileDialog(self)

        # define application layout
        self.layout = QVBoxLayout(self)
        self.layout.setSpacing(1)
        self.layout.setContentsMargins(1, 1, 1, 1)
        self.layout1 = QHBoxLayout()
        self.layout1.setSpacing(1)
        self.layout1.addWidget(self.ZMatTable)
        self.layout1.addWidget(self.window)
        self.layout.addWidget(self.menuBar)
        self.layout.addLayout(self.layout1)
        self.layout.addWidget(self.statusBar)

        self.adjustSize()
        self.setWindowTitle('Moldy')
        iconPath = 'icon.png'
        icon = QIcon(iconPath)
        icon.addFile(iconPath, QSize(16, 16))
        icon.addFile(iconPath, QSize(24, 24))
        icon.addFile(iconPath, QSize(32, 32))
        icon.addFile(iconPath, QSize(48, 48))
        icon.addFile(iconPath, QSize(256, 256))
        self.setWindowIcon(icon)

        # start monitoring changes in the ZMatModel
        self.ZMatModel.dataChanged.connect(self.clearUpdateView)

    # run and show the application
    def run(self):
        self.show()
        self.ZMatTable.clicked.connect(self.ZMatCellClicked)
        qt_app.instance().aboutToQuit.connect(self.deleteGLwidget)
        qt_app.exec_()

    # fill the ZMatModel with initial data from 'self.inp'
    def populateZMatModel(self):
        self.ZMatModel.removeRows(0, self.ZMatModel.rowCount())
        for i, row in enumerate(self.inp):
            for j, cell in enumerate(row):
                item = QStandardItem(str(cell))
                self.ZMatModel.setItem(i, j, item)
        # some cells should not be editable, they are disabled
        for i in range(min(len(self.inp), 3)):
            for j in range(2*i+1, 7):
                self.ZMatModel.setItem(i, j, QStandardItem())
                self.ZMatModel.item(i, j).setBackground(QColor(150,150,150))
                self.ZMatModel.item(i, j).setFlags(Qt.ItemIsEnabled)
    
    def populateFreqModel(self):
        self.FreqModel.removeRows(0, self.FreqModel.rowCount())
        for i, row in enumerate(zip(self.vibfreqs, self.vibirs, self.vibramans)):
            for j, cell in enumerate(row):
                item = QStandardItem(str(cell))
                self.FreqModel.setItem(i, j, item)

    # add a row to the bottom of the ZMatModel
    def addRow(self):
        # temporarily stop updating the GL window
        self.ZMatModel.dataChanged.disconnect(self.clearUpdateView)
        row = self.ZMatModel.rowCount()
        self.ZMatModel.insertRow(row)
        # some cells should not be editable
        if row < 3:
            for j in range(2*row+1, 7):
                self.ZMatModel.setItem(row, j, QStandardItem())
                self.ZMatModel.item(row, j).setBackground(QColor(150,150,150))
                self.ZMatModel.item(row, j).setFlags(Qt.ItemIsEnabled)
        # restart GL window updating
        self.ZMatModel.dataChanged.connect(self.clearUpdateView)
        self.statusBar.clearMessage()
        self.statusBar.showMessage('Added 1 row.', 3000)

    # delete the last row of the ZMatModel
    def deleteRow(self):
        xyz = [list(vi) for vi in list(v)]
        atoms = [str(elements[e]) for e in elems]
        oldLen = self.ZMatModel.rowCount()
        idxs = sorted(set(idx.row() for idx in self.ZMatTable.selectedIndexes()), reverse=True)
        newLen = oldLen - len(idxs)
        if newLen == oldLen:
            self.ZMatModel.removeRow(self.ZMatModel.rowCount()-1)
        else:
            self.ZMatModel.dataChanged.disconnect(self.clearUpdateView)
            for idx in idxs:
                self.ZMatModel.removeRow(idx)
                if idx < 3:
                    for i in range(idx, min(3, newLen)):
                        for j in range(2*i+1, 7):
                            self.ZMatModel.setItem(i, j, QStandardItem())
                            self.ZMatModel.item(i, j).setBackground(QColor(150,150,150))
                            self.ZMatModel.item(i, j).setFlags(Qt.ItemIsEnabled)
                if len(xyz) > idx:
                    xyz.pop(idx)
                    atoms.pop(idx)
            self.inp = xyz2zmat(xyz, atoms)
            self.populateZMatModel()
            for i in reversed(self.highList):
                self.window.removeItem(i[1])
            self.highList = []
            self.ZMatModel.dataChanged.connect(self.clearUpdateView)
        self.updateView()
        self.statusBar.clearMessage()
        if idxs:
            self.statusBar.showMessage('Deleted row(s): '+str([i+1 for i in idxs]), 3000)
        else:
            self.statusBar.showMessage('Deleted last row.', 3000)

    # show the periodic table widget
    def periodicTable(self):
        self.statusBar.clearMessage()
        self.statusBar.showMessage('Select element from periodic table.')
        self.periodicTableWidget.exec_()
        selection = self.periodicTableWidget.selection()
        return selection

    # import molecule with zmatrix coordinates
    def readZmat(self):
        self.ZMatModel.dataChanged.disconnect(self.clearUpdateView)
        filename = self.fileDialog.getOpenFileName(self, 'Open file', expanduser('~'), '*.zmat;;*.*')
        self.inp = []
        self.populateZMatModel()
        if filename:
            with open(filename, 'r') as f:
                next(f)
                next(f)
                for row in f:
                    self.inp.append(row.split())
                f.close()
            self.populateZMatModel()
        self.ZMatModel.dataChanged.connect(self.clearUpdateView)
        self.updateView()
        self.statusBar.clearMessage()
        self.statusBar.showMessage('Read molecule from '+filename+'.', 5000)
        self.showGaussAction.setEnabled(False)
        self.showFreqAction.setEnabled(False)

    # import molecule with xyz coordinates
    def readXYZ(self):
        self.ZMatModel.dataChanged.disconnect(self.clearUpdateView)
        filename = self.fileDialog.getOpenFileName(self, 'Open file', expanduser('~'), '*.xyz;;*.*')
        xyz = []
        elems = []
        self.inp = []
        self.populateZMatModel()
        if filename:
            with open(filename, 'r') as f:
                next(f)
                next(f)
                for row in f:
                    rs = row.split()
                    if len(rs) == 4:
                        elems.append(rs[0])
                        xyz.append([float(f) for f in rs[1:]])
                f.close()
            self.inp = xyz2zmat(xyz, elems)
            self.populateZMatModel()
            #print(elems)
        self.ZMatModel.dataChanged.connect(self.clearUpdateView)
        self.updateView()
        self.statusBar.clearMessage()
        self.statusBar.showMessage('Read molecule from '+filename+'.', 5000)
        self.showGaussAction.setEnabled(False)
        self.showFreqAction.setEnabled(False)

    # import Gaussian log file
    def readGaussian(self):
        global vsShifted
        self.ZMatModel.dataChanged.disconnect(self.clearUpdateView)
        filename = self.fileDialog.getOpenFileName(self, 'Open file', expanduser('~'), '*.log;;*.*')
        if filename:
            self.gaussianPlot.clear()
            self.inp = []
            self.populateZMatModel()
            file = ccopen(filename)
            data = file.parse().getattributes()
            self.natom = data['natom']
            self.atomnos = data['atomnos'].tolist()
            self.atomsymbols = [ str(elements[e]) for e in self.atomnos ]
            self.atomcoords = data['atomcoords'].tolist()
            self.scfenergies = data['scfenergies'].tolist()
            self.geovalues = data['geovalues'].T.tolist()
            self.geotargets = data['geotargets'].tolist()
            if 'vibfreqs' in data.keys():
                self.vibfreqs = data['vibfreqs']
                #print(self.vibfreqs)
                self.vibirs = data['vibirs']
                #print(self.vibirs)
                #print(data.keys())
                if 'vibramans' in data.keys():
                    self.vibramans = data['vibramans']
                else:
                    self.vibramans = [''] * len(self.vibirs)
                self.vibdisps = data['vibdisps']
                #print(self.vibdisps)
            self.inp = xyz2zmat(self.atomcoords[0], self.atomsymbols)
            self.populateZMatModel()

            titles = ['SCF Energies', 'RMS & Max Forces', 'RMS & Max Displacements']
            for i in range(3):
                self.gaussianPlot.addPlot(row=1, col=i+1)
                plot = self.gaussianPlot.getItem(1, i+1)
                plot.setTitle(title=titles[i])
                if i == 0:
                    c = ['c']
                    x = [0]
                    y = [self.scfenergies]
                else:
                    c = ['r', 'y']
                    x = [0, 0]
                    y = [self.geovalues[2*i-2], self.geovalues[2*i-1]]
                    targety = [self.geotargets[2*i-2], self.geotargets[2*i-1]]
                plot.clear()
                plot.maxData = plot.plot(y[0], symbol='o', symbolPen=c[0], symbolBrush=c[0], pen=c[0], symbolSize=5, pxMode=True, antialias=True, autoDownsample=False)
                plot.highlight=plot.plot(x, [ yy[0] for yy in y ], symbol='o', symbolPen='w', symbolBrush=None, pen=None, symbolSize=15, pxMode=True, antialias=True, autoDownsample=False)
                plot.maxData.sigPointsClicked.connect(self.gausclicked)
                if i > 0:
                    for j in range(2):
                        plot.addLine(y=np.log10(targety[j]), pen=mkPen((255, 255*j, 0, int(255/2)), width=1))
                    plot.RMSData=plot.plot(y[1], symbol='o', symbolPen=c[1], symbolBrush=c[1], pen=c[1], symbolSize=5, pxMode=True, antialias=True, autoDownsample=False)
                    plot.RMSData.sigPointsClicked.connect(self.gausclicked)
                    plot.setLogMode(y=True)
            self.showGauss()
            self.updateView()
            self.statusBar.clearMessage()
            self.statusBar.showMessage('Read molecule from '+filename+'.', 5000)
            self.ZMatModel.dataChanged.connect(self.clearUpdateView)
            if self.natom:
                self.showGaussAction.setEnabled(True)
            if 'vibfreqs' in data.keys():
                self.showFreqAction.setEnabled(True)

                # populate the FreqModel
                self.populateFreqModel()

                self.freqPlot.clear()
                irPlot = self.freqPlot.addPlot(row=1, col=1)
                irPlot.clear()
                minFreq = np.min(self.vibfreqs)
                maxFreq = np.max(self.vibfreqs)
                maxInt = np.max(self.vibirs)
                x = np.sort(np.concatenate([np.linspace(minFreq-100, maxFreq+100, num=1000), self.vibfreqs]))
                y = x*0
                for f,i in zip(self.vibfreqs, self.vibirs):
                    y += lorentzv(x, f, 2*np.pi, i)
                #xy = np.array([np.concatenate([x, np.array(self.vibfreqs)]), np.concatenate([y, np.array(self.vibirs)])]).T
                #xysort = xy[xy[:,0].argsort()]
                irPlot.maxData = irPlot.plot(x, y, antialias=True)
                markers = ErrorBarItem(x=self.vibfreqs, y=self.vibirs, top=maxInt/30, bottom=None, pen='r')
                irPlot.addItem(markers)
                self.showFreq()
                #self.vibdisps = np.append(self.vibdisps, [np.mean(self.vibdisps, axis=0)], axis=0)
                maxt = 100
                vsShifted = np.array([ [ vs + self.vibdisps[i]*np.sin(t*2*np.pi/maxt)/3 for t in range(maxt) ] for i in range(len(self.vibfreqs)) ])
            else:
                self.showFreqAction.setEnabled(False)
                self.freqWidget.hide()

    def showGauss(self):
        self.gaussianPlot.show()

    def showFreq(self):
        self.freqWidget.show()

    # export Zmatrix to csv
    def writeZmat(self):
        zm = model2list(self.ZMatModel)
        filename = self.fileDialog.getSaveFileName(self, 'Save file', expanduser('~')+'/'+getFormula(list(list(zip(*zm))[0]))+'.zmat', '*.zmat;;*.*')
        try:
            filename
        except NameError:
            pass
        else:
            if filename:
                writeOutput(zm, filename)
                self.statusBar.clearMessage()
                self.statusBar.showMessage('Wrote molecule to '+filename+'.', 5000)

    # export XYZ coordinates to csv
    def writeXYZ(self):
        xyz = []
        zm = model2list(self.ZMatModel)
        for i in range(len(v)):
            xyz.append(np.round(v[i], 7).tolist())
            xyz[i][:0] = zm[i][0]
        if len(v) > 0:
            formula = getFormula(list(list(zip(*xyz))[0]))
        else:
            formula = 'moldy_output'
        filename = self.fileDialog.getSaveFileName(self, 'Save file', expanduser('~')+'/'+formula+'.xyz', '*.xyz;;*.*')
        try:
            filename
        except NameError:
            pass
        else:
            if filename:
                writeOutput(xyz, filename)
                self.statusBar.clearMessage()
                self.statusBar.showMessage('Wrote molecule to '+filename+'.', 5000)

    # redraw the 3D molecule in GL widget
    def updateView(self):
        global r
        global c
        global v
        global vs
        global elems
        global nelems
        data = model2list(self.ZMatModel)
        try:
            # create a list with element coordinates
            v = zmat2xyz(data)
        except (AssertionError, IndexError, ZMError):
            pass
        else:
            # clear the screen before redraw
            for item in reversed(self.window.items):
                self.window.removeItem(item)
            # create a second coordinate list 'vs' that is centered in the GL view
            self.atomList = []
            if len(v) > 0:
                shift = np.mean(v, axis=0)
                vs = np.add(v, -shift)
                elems = [ 1 + next((i for i, sublist in enumerate(colors) if row[0] in sublist), -1) for row in data ]
                nelems = len(elems)
                # define molecule radii and colors
                r = []
                c = []
                for i in elems:
                    r.append(elements[i].covalent_radius)
                    c.append(colors[i-1][-1])
                # draw atoms
                for i in range(nelems):
                    addAtom(self.window, i, r, vs, c, fast=self.fast)
                    self.atomList.append([i, self.window.items[-1]])
                #print(self.atomList)
                # draw bonds where appropriate
                combs = list(itertools.combinations(range(nelems), 2))
                bonds = []
                for i in combs:
                    bonds.append(addBond(self.window, i[0], i[1], r, vs, c, fast=self.fast))
                if self.fast:
                    bondedAtoms = set(filter((None).__ne__, flatten(bonds)))
                    for i in set(range(nelems)) - bondedAtoms:
                        addUnbonded(self.window, i, vs, c)
                        self.atomList[i][1]=self.window.items[-1]
                    #print(self.atomList)

                for i in self.highList:
                    self.window.addItem(i[1])
                for i in self.labelList:
                    self.window.addItem(i)
        if len(v) > 1:
            maxDim = float('-inf')
            for dim in v.T:
                span = max(dim)-min(dim)
                if span > maxDim:
                    maxDim = span
        else: maxDim = 2
        self.window.setCameraPosition(distance=maxDim*1.5+1)

    global index
    index = 0
    def updateFreq(self):
        global vsShifted, index, r, c
        index += 1
        index = index % len(vsShifted[0])
        #print(index)
        #print(vsShifted[index])
        for item in reversed(self.window.items):
            self.window.removeItem(item)
        for i in range(nelems):
            addAtom(self.window, i, r, vsShifted[self.freqIndex, index], c, fast=self.fast)
            self.atomList.append([i, self.window.items[-1]])
        combs = itertools.combinations(range(nelems), 2)
        bonds = []
        for i in combs:
            bonds.append(addBond(self.window, i[0], i[1], r, vsShifted[self.freqIndex, index], c, fast=self.fast))
        if self.fast:
            bondedAtoms = set(filter((None).__ne__, flatten(bonds)))
            for i in set(range(nelems)) - bondedAtoms:
                addUnbonded(self.window, i, vsShifted[self.freqIndex, index], c)
                self.atomList[i][1]=self.window.items[-1]

    # detect mouse clicks in GL window and process them
    def eventFilter(self, obj, event):
        if obj == self.window:
            if event.type() == event.MouseButtonPress:
                itms = obj.itemsAt((event.pos().x()-2, event.pos().y()-2, 4, 4))
                if len(itms):
                    self.highlight(obj, [itms[0]])
                elif len(self.atomList) == 0:
                    self.build()
        # also do the default click action
        return super(MainWidget, self).eventFilter(obj, event)

    def ZMatCellClicked(self):
        idxs = sorted(set(idx.row() for idx in self.ZMatTable.selectedIndexes()), reverse=True)
        itms = []
        if self.highList:
            highIdx = list(np.array(self.highList).T[0])
        for idx in idxs:
            if self.highList and idx in highIdx:
                itms.append(self.highList[highIdx.index(idx)][1])
            elif len(self.atomList) > idx:
                itms.append(self.atomList[idx][1])
        self.highlight(self.window, itms)

    def freqCellClicked(self):
        global vsShifted
        self.timer = QTimer()
        self.timer.setInterval(30)
        self.timer.timeout.connect(self.updateFreq)
        idxs = [ idx.row() for idx in self.freqTable.selectedIndexes() ]
        if len(idxs) == 1:
            self.freqIndex = idxs[0]
            self.timer.stop()
            self.timer.timeout.connect(self.updateFreq)
            try:
                self.ZMatModel.dataChanged.disconnect(self.clearUpdateView)
            except TypeError:
                pass
            self.timer.start()
        if len(idxs) != 1:
            self.timer.stop()
            self.freqTable.clearSelection()
            self.timer.timeout.disconnect(self.updateFreq)
            self.ZMatModel.dataChanged.connect(self.clearUpdateView)
            self.clearUpdateView()

    def gausclicked(self, item, point):
        itemdata = item.scatter.data
        points = [ row[7] for row in itemdata ]
        idx = points.index(point[0])
        for i in range(3):
            if i == 0:
                x = [idx]
                y = [self.scfenergies[idx]]
            else:
                x = [idx, idx]
                y = [self.geovalues[2*i-2][idx], self.geovalues[2*i-1][idx]]
            plot = self.gaussianPlot.getItem(1, i+1)
            plot.removeItem(plot.highlight)
            plot.highlight=plot.plot(x, y, symbol='o', symbolPen='w', symbolBrush=None, pen=None, symbolSize=15, pxMode=True, antialias=True, autoDownsample=False)
        self.ZMatModel.dataChanged.disconnect(self.clearUpdateView)
        self.inp = []
        self.populateZMatModel()
        self.inp = xyz2zmat(self.atomcoords[min(idx, len(self.atomcoords)-1)], self.atomsymbols)
        self.populateZMatModel()
        self.ZMatModel.dataChanged.connect(self.clearUpdateView)
        self.updateView()

    def highlight(self, obj, itms):
        for itm in itms:
            idx = next((i for i, sublist in enumerate(self.atomList) if itm in sublist), -1)
            #print(idx)
            if idx != -1:
                addAtom(obj, idx, r, vs, c, opt='highlight', fast=self.fast)
                self.highList.append([idx, obj.items[-1]])
                self.ZMatTable.selectRow(idx)
            idx = next((i for i, sublist in enumerate(self.highList) if itm in sublist), -1)
            if idx != -1:
                obj.removeItem(self.highList[idx][1])
                self.highList.pop(idx)
                self.ZMatTable.clearSelection()
        self.statusBar.clearMessage()
        if len(self.highList) > 0:
            idxs = np.asarray(self.highList).T[0]
            selected = []
            for i in idxs:
                selected.append(str(i+1)+str(elements[elems[i]]))
            self.statusBar.showMessage('Selected atoms: '+str(selected), 5000)

    def buildB(self):
        try:
            nelems
        except NameError:
            self.build()
        else:
            if len(self.highList) <= min(nelems, 3):
                diff = min(nelems, 3) - len(self.highList)
                if diff != 0:
                    self.statusBar.clearMessage()
                    self.statusBar.showMessage('Please select '+str(diff)+' more atom(s).')
                else:
                    self.build()
            else:
                self.statusBar.clearMessage()
                self.statusBar.showMessage('Too many atoms selected.')

    def build(self):
        selection = self.periodicTable()
        row = self.ZMatModel.rowCount()
        self.addRow()
        self.ZMatModel.dataChanged.disconnect(self.clearUpdateView)
        newSymbol = selection[1]
        newData = [newSymbol]
        if len(self.highList) >= 1:
            newBond = round(2.1*gmean([ elements[e].covalent_radius for e in [selection[0], elems[self.highList[0][0]]] ]), 4)
            newData.append(self.highList[0][0]+1)
            newData.append(newBond)
            if len(self.highList) >= 2:
                newAngle = 109.4712
                newData.append(self.highList[1][0]+1)
                newData.append(newAngle)
                if len(self.highList) == 3:
                    newDihedral = 120.
                    newData.append(self.highList[2][0]+1)
                    newData.append(newDihedral)
        for j, cell in enumerate(newData):
            item = QStandardItem(str(cell))
            self.ZMatModel.setItem(row, j, item)
        self.highList = []
        self.ZMatModel.dataChanged.connect(self.clearUpdateView)
        self.updateView()

    def measureDistanceB(self):
        sel = len(self.highList)
        if sel <= 2:
            if sel < 2:
                self.statusBar.clearMessage()
                self.statusBar.showMessage('Please select '+str(2-sel)+' more atom(s).')
            else:
                self.measureDistance()
        else:
            self.statusBar.clearMessage()
            self.statusBar.showMessage('Too many atoms selected.')

    def measureDistance(self):
        pts = []
        for pt in self.highList:
            pts.append(vs[pt[0]])
        pts = np.array(pts)
        self.clearHighlights()
        line = gl.GLLinePlotItem(pos=pts, color=(0., 1., 0., 1.), width=3)
        self.window.addItem(line)
        self.labelList.append(line)
        q = pts[1]-pts[0]
        dist = round(np.sqrt(np.dot(q, q)), 4)
        self.window.labelPos.append(np.mean(pts[0:2], axis=0))
        self.window.labelText.append(str(dist))
        self.statusBar.clearMessage()
        self.statusBar.showMessage('Measured distance: '+str(dist)+' A.', 3000)

    def measureAngleB(self):
        sel = len(self.highList)
        if sel <= 3:
            if sel < 3:
                self.statusBar.clearMessage()
                self.statusBar.showMessage('Please select '+str(3-sel)+' more atom(s).')
            else:
                self.measureAngle()
        else:
            self.statusBar.clearMessage()
            self.statusBar.showMessage('Too many atoms selected.')

    def measureAngle(self):
        pts = []
        for pt in self.highList:
            pts.append(vs[pt[0]])
        pts = np.array(pts)
        q = pts[1]-pts[0]
        r = pts[2]-pts[0]
        q_u = q / np.sqrt(np.dot(q, q))
        r_u = r / np.sqrt(np.dot(r, r))
        angle = round(degrees(acos(np.dot(q_u, r_u))), 1)
        srange = np.array([slerp(q, r, t) for t in np.arange(0.0, 13/12, 1/12)])
        self.clearHighlights()
        for i in range(12):
            mesh = gl.MeshData(np.array([[0,0,0],srange[i],srange[i+1]]))
            tri = gl.GLMeshItem(meshdata=mesh, smooth=False, computeNormals=False, color=(0.3, 1., 0.3, 0.5), glOptions=('translucent'))
            tri.translate(pts[0][0], pts[0][1], pts[0][2])
            self.window.addItem(tri)
            self.labelList.append(tri)
        self.window.labelPos.append(slerp(q, r, 0.5)+pts[0])
        self.window.labelText.append(str(angle))
        self.statusBar.clearMessage()
        self.statusBar.showMessage('Measured angle: '+str(angle)+'°', 3000)

    def clearLabels(self):
        self.window.labelPos = []
        self.window.labelText = []
        self.labelList = []
        self.updateView()

    def clearHighlights(self):
        for item in reversed(self.highList):
                self.window.removeItem(item[1])
        self.highList = []
        self.updateView()

    def clearUpdateView(self):
        self.window.labelPos = []
        self.window.labelText = []
        self.labelList = []
        for item in reversed(self.highList):
                self.window.removeItem(item[1])
        self.highList = []
        self.updateView()
        #print(self.highList)

    def fastDraw(self):
        if not self.fast:
            self.fast = True
            self.updateView()

    def normalDraw(self):
        if self.fast:
            self.fast = False
            self.updateView()

    def about(self):
        QMessageBox.about(self, 'About moldy', 'moldy beta 15. 9. 2015')

    def aboutQt(self):
        QMessageBox.aboutQt(self, 'About Qt')

    def deleteGLwidget(self):
        self.window.setParent(None)
        del self.window
class PluginUpdaterDialog(SizePersistedDialog):

    initial_extra_size = QSize(350, 100)

    def __init__(self, gui, initial_filter=FILTER_UPDATE_AVAILABLE):
        SizePersistedDialog.__init__(self, gui, 'Plugin Updater plugin:plugin updater dialog')
        self.gui = gui
        self.forum_link = None
        self.model = None
        self._initialize_controls()
        self._create_context_menu()

        display_plugins = read_available_plugins()

        if display_plugins:
            self.model = DisplayPluginModel(display_plugins)
            self.proxy_model = DisplayPluginSortFilterModel(self)
            self.proxy_model.setSourceModel(self.model)
            self.plugin_view.setModel(self.proxy_model)
            self.plugin_view.resizeColumnsToContents()
            self.plugin_view.selectionModel().currentRowChanged.connect(self._plugin_current_changed)
            self.plugin_view.doubleClicked.connect(self.install_button.click)
            self.filter_combo.setCurrentIndex(initial_filter)
            self._select_and_focus_view()
        else:
            error_dialog(self.gui, _('Update Check Failed'),
                        _('Unable to reach the MobileRead plugins forum index page.'),
                        det_msg=MR_INDEX_URL, show=True)
            self.filter_combo.setEnabled(False)
        # Cause our dialog size to be restored from prefs or created on first usage
        self.resize_dialog()

    def _initialize_controls(self):
        self.setWindowTitle(_('User plugins'))
        self.setWindowIcon(QIcon(I('plugins/plugin_updater.png')))
        layout = QVBoxLayout(self)
        self.setLayout(layout)
        title_layout = ImageTitleLayout(self, 'plugins/plugin_updater.png',
                _('User Plugins'))
        layout.addLayout(title_layout)

        header_layout = QHBoxLayout()
        layout.addLayout(header_layout)
        self.filter_combo = PluginFilterComboBox(self)
        self.filter_combo.setMinimumContentsLength(20)
        self.filter_combo.currentIndexChanged[int].connect(self._filter_combo_changed)
        header_layout.addWidget(QLabel(_('Filter list of plugins')+':', self))
        header_layout.addWidget(self.filter_combo)
        header_layout.addStretch(10)

        self.plugin_view = QTableView(self)
        self.plugin_view.horizontalHeader().setStretchLastSection(True)
        self.plugin_view.setSelectionBehavior(QAbstractItemView.SelectRows)
        self.plugin_view.setSelectionMode(QAbstractItemView.SingleSelection)
        self.plugin_view.setAlternatingRowColors(True)
        self.plugin_view.setSortingEnabled(True)
        self.plugin_view.setIconSize(QSize(28, 28))
        layout.addWidget(self.plugin_view)

        details_layout = QHBoxLayout()
        layout.addLayout(details_layout)
        forum_label = QLabel('<a href="http://www.foo.com/">Plugin Forum Thread</a>', self)
        forum_label.setTextInteractionFlags(Qt.LinksAccessibleByMouse | Qt.LinksAccessibleByKeyboard)
        forum_label.linkActivated.connect(self._forum_label_activated)
        details_layout.addWidget(QLabel(_('Description')+':', self), 0, Qt.AlignLeft)
        details_layout.addWidget(forum_label, 1, Qt.AlignRight)

        self.description = QLabel(self)
        self.description.setFrameStyle(QFrame.Panel | QFrame.Sunken)
        self.description.setAlignment(Qt.AlignTop | Qt.AlignLeft)
        self.description.setMinimumHeight(40)
        layout.addWidget(self.description)

        self.button_box = QDialogButtonBox(QDialogButtonBox.Close)
        self.button_box.rejected.connect(self.reject)
        self.finished.connect(self._finished)
        self.install_button = self.button_box.addButton(_('&Install'), QDialogButtonBox.AcceptRole)
        self.install_button.setToolTip(_('Install the selected plugin'))
        self.install_button.clicked.connect(self._install_clicked)
        self.install_button.setEnabled(False)
        self.configure_button = self.button_box.addButton(' '+_('&Customize plugin ')+' ', QDialogButtonBox.ResetRole)
        self.configure_button.setToolTip(_('Customize the options for this plugin'))
        self.configure_button.clicked.connect(self._configure_clicked)
        self.configure_button.setEnabled(False)
        layout.addWidget(self.button_box)

    def _create_context_menu(self):
        self.plugin_view.setContextMenuPolicy(Qt.ActionsContextMenu)
        self.install_action = QAction(QIcon(I('plugins/plugin_upgrade_ok.png')), _('&Install'), self)
        self.install_action.setToolTip(_('Install the selected plugin'))
        self.install_action.triggered.connect(self._install_clicked)
        self.install_action.setEnabled(False)
        self.plugin_view.addAction(self.install_action)
        self.history_action = QAction(QIcon(I('chapters.png')), _('Version &History'), self)
        self.history_action.setToolTip(_('Show history of changes to this plugin'))
        self.history_action.triggered.connect(self._history_clicked)
        self.history_action.setEnabled(False)
        self.plugin_view.addAction(self.history_action)
        self.forum_action = QAction(QIcon(I('plugins/mobileread.png')), _('Plugin &Forum Thread'), self)
        self.forum_action.triggered.connect(self._forum_label_activated)
        self.forum_action.setEnabled(False)
        self.plugin_view.addAction(self.forum_action)

        sep1 = QAction(self)
        sep1.setSeparator(True)
        self.plugin_view.addAction(sep1)

        self.toggle_enabled_action = QAction(_('Enable/&Disable plugin'), self)
        self.toggle_enabled_action.setToolTip(_('Enable or disable this plugin'))
        self.toggle_enabled_action.triggered.connect(self._toggle_enabled_clicked)
        self.toggle_enabled_action.setEnabled(False)
        self.plugin_view.addAction(self.toggle_enabled_action)
        self.uninstall_action = QAction(_('&Remove plugin'), self)
        self.uninstall_action.setToolTip(_('Uninstall the selected plugin'))
        self.uninstall_action.triggered.connect(self._uninstall_clicked)
        self.uninstall_action.setEnabled(False)
        self.plugin_view.addAction(self.uninstall_action)

        sep2 = QAction(self)
        sep2.setSeparator(True)
        self.plugin_view.addAction(sep2)

        self.donate_enabled_action = QAction(QIcon(I('donate.png')), _('Donate to developer'), self)
        self.donate_enabled_action.setToolTip(_('Donate to the developer of this plugin'))
        self.donate_enabled_action.triggered.connect(self._donate_clicked)
        self.donate_enabled_action.setEnabled(False)
        self.plugin_view.addAction(self.donate_enabled_action)

        sep3 = QAction(self)
        sep3.setSeparator(True)
        self.plugin_view.addAction(sep3)

        self.configure_action = QAction(QIcon(I('config.png')), _('&Customize plugin'), self)
        self.configure_action.setToolTip(_('Customize the options for this plugin'))
        self.configure_action.triggered.connect(self._configure_clicked)
        self.configure_action.setEnabled(False)
        self.plugin_view.addAction(self.configure_action)

    def _finished(self, *args):
        if self.model:
            update_plugins = filter(filter_upgradeable_plugins, self.model.display_plugins)
            self.gui.recalc_update_label(len(update_plugins))

    def _plugin_current_changed(self, current, previous):
        if current.isValid():
            actual_idx = self.proxy_model.mapToSource(current)
            display_plugin = self.model.display_plugins[actual_idx.row()]
            self.description.setText(display_plugin.description)
            self.forum_link = display_plugin.forum_link
            self.forum_action.setEnabled(bool(self.forum_link))
            self.install_button.setEnabled(display_plugin.is_valid_to_install())
            self.install_action.setEnabled(self.install_button.isEnabled())
            self.uninstall_action.setEnabled(display_plugin.is_installed())
            self.history_action.setEnabled(display_plugin.has_changelog)
            self.configure_button.setEnabled(display_plugin.is_installed())
            self.configure_action.setEnabled(self.configure_button.isEnabled())
            self.toggle_enabled_action.setEnabled(display_plugin.is_installed())
            self.donate_enabled_action.setEnabled(bool(display_plugin.donation_link))
        else:
            self.description.setText('')
            self.forum_link = None
            self.forum_action.setEnabled(False)
            self.install_button.setEnabled(False)
            self.install_action.setEnabled(False)
            self.uninstall_action.setEnabled(False)
            self.history_action.setEnabled(False)
            self.configure_button.setEnabled(False)
            self.configure_action.setEnabled(False)
            self.toggle_enabled_action.setEnabled(False)
            self.donate_enabled_action.setEnabled(False)

    def _donate_clicked(self):
        plugin = self._selected_display_plugin()
        if plugin and plugin.donation_link:
            open_url(QUrl(plugin.donation_link))

    def _select_and_focus_view(self, change_selection=True):
        if change_selection and self.plugin_view.model().rowCount() > 0:
            self.plugin_view.selectRow(0)
        else:
            idx = self.plugin_view.selectionModel().currentIndex()
            self._plugin_current_changed(idx, 0)
        self.plugin_view.setFocus()

    def _filter_combo_changed(self, idx):
        self.proxy_model.set_filter_criteria(idx)
        if idx == FILTER_NOT_INSTALLED:
            self.plugin_view.sortByColumn(5, Qt.DescendingOrder)
        else:
            self.plugin_view.sortByColumn(0, Qt.AscendingOrder)
        self._select_and_focus_view()

    def _forum_label_activated(self):
        if self.forum_link:
            open_url(QUrl(self.forum_link))

    def _selected_display_plugin(self):
        idx = self.plugin_view.selectionModel().currentIndex()
        actual_idx = self.proxy_model.mapToSource(idx)
        return self.model.display_plugins[actual_idx.row()]

    def _uninstall_plugin(self, name_to_remove):
        if DEBUG:
            prints('Removing plugin: ', name_to_remove)
        remove_plugin(name_to_remove)
        # Make sure that any other plugins that required this plugin
        # to be uninstalled first have the requirement removed
        for display_plugin in self.model.display_plugins:
            # Make sure we update the status and display of the
            # plugin we just uninstalled
            if name_to_remove in display_plugin.uninstall_plugins:
                if DEBUG:
                    prints('Removing uninstall dependency for: ', display_plugin.name)
                display_plugin.uninstall_plugins.remove(name_to_remove)
            if display_plugin.name == name_to_remove:
                if DEBUG:
                    prints('Resetting plugin to uninstalled status: ', display_plugin.name)
                display_plugin.installed_version = None
                display_plugin.plugin = None
                display_plugin.uninstall_plugins = []
                if self.proxy_model.filter_criteria not in [FILTER_INSTALLED, FILTER_UPDATE_AVAILABLE]:
                    self.model.refresh_plugin(display_plugin)

    def _uninstall_clicked(self):
        display_plugin = self._selected_display_plugin()
        if not question_dialog(self, _('Are you sure?'), '<p>'+
                   _('Are you sure you want to uninstall the <b>%s</b> plugin?')%display_plugin.name,
                   show_copy_button=False):
            return
        self._uninstall_plugin(display_plugin.name)
        if self.proxy_model.filter_criteria in [FILTER_INSTALLED, FILTER_UPDATE_AVAILABLE]:
            self.model.reset()
            self._select_and_focus_view()
        else:
            self._select_and_focus_view(change_selection=False)

    def _install_clicked(self):
        display_plugin = self._selected_display_plugin()
        if not question_dialog(self, _('Install %s')%display_plugin.name, '<p>' + \
                _('Installing plugins is a <b>security risk</b>. '
                'Plugins can contain a virus/malware. '
                    'Only install it if you got it from a trusted source.'
                    ' Are you sure you want to proceed?'),
                show_copy_button=False):
            return

        if display_plugin.uninstall_plugins:
            uninstall_names = list(display_plugin.uninstall_plugins)
            if DEBUG:
                prints('Uninstalling plugin: ', ', '.join(uninstall_names))
            for name_to_remove in uninstall_names:
                self._uninstall_plugin(name_to_remove)

        if DEBUG:
            prints('Locating zip file for %s: %s'% (display_plugin.name, display_plugin.forum_link))
        self.gui.status_bar.showMessage(
                _('Locating zip file for %(name)s: %(link)s') % dict(
                    name=display_plugin.name, link=display_plugin.forum_link))
        plugin_zip_url = self._read_zip_attachment_url(display_plugin.forum_link)
        if not plugin_zip_url:
            return error_dialog(self.gui, _('Install Plugin Failed'),
                        _('Unable to locate a plugin zip file for <b>%s</b>') % display_plugin.name,
                        det_msg=display_plugin.forum_link, show=True)

        if DEBUG:
            prints('Downloading plugin zip attachment: ', plugin_zip_url)
        self.gui.status_bar.showMessage(_('Downloading plugin zip attachment: %s') % plugin_zip_url)
        zip_path = self._download_zip(plugin_zip_url)

        if DEBUG:
            prints('Installing plugin: ', zip_path)
        self.gui.status_bar.showMessage(_('Installing plugin: %s') % zip_path)

        try:
            try:
                plugin = add_plugin(zip_path)
            except NameConflict as e:
                return error_dialog(self.gui, _('Already exists'),
                        unicode(e), show=True)
            # Check for any toolbars to add to.
            widget = ConfigWidget(self.gui)
            widget.gui = self.gui
            widget.check_for_add_to_toolbars(plugin)
            self.gui.status_bar.showMessage(_('Plugin installed: %s') % display_plugin.name)
            info_dialog(self.gui, _('Success'),
                    _('Plugin <b>{0}</b> successfully installed under <b>'
                        ' {1} plugins</b>. You may have to restart calibre '
                        'for the plugin to take effect.').format(plugin.name, plugin.type),
                    show=True, show_copy_button=False)

            display_plugin.plugin = plugin
            # We cannot read the 'actual' version information as the plugin will not be loaded yet
            display_plugin.installed_version = display_plugin.available_version
        except:
            if DEBUG:
                prints('ERROR occurred while installing plugin: %s'%display_plugin.name)
                traceback.print_exc()
            error_dialog(self.gui, _('Install Plugin Failed'),
                         _('A problem occurred while installing this plugin.'
                           ' This plugin will now be uninstalled.'
                           ' Please post the error message in details below into'
                           ' the forum thread for this plugin and restart Calibre.'),
                         det_msg=traceback.format_exc(), show=True)
            if DEBUG:
                prints('Due to error now uninstalling plugin: %s'%display_plugin.name)
                remove_plugin(display_plugin.name)
                display_plugin.plugin = None

        display_plugin.uninstall_plugins = []
        if self.proxy_model.filter_criteria in [FILTER_NOT_INSTALLED, FILTER_UPDATE_AVAILABLE]:
            self.model.reset()
            self._select_and_focus_view()
        else:
            self.model.refresh_plugin(display_plugin)
            self._select_and_focus_view(change_selection=False)

    def _history_clicked(self):
        display_plugin = self._selected_display_plugin()
        text = self._read_version_history_html(display_plugin.forum_link)
        if text:
            dlg = VersionHistoryDialog(self, display_plugin.name, text)
            dlg.exec_()
        else:
            return error_dialog(self, _('Version history missing'),
                _('Unable to find the version history for %s')%display_plugin.name,
                show=True)

    def _configure_clicked(self):
        display_plugin = self._selected_display_plugin()
        plugin = display_plugin.plugin
        if not plugin.is_customizable():
            return info_dialog(self, _('Plugin not customizable'),
                _('Plugin: %s does not need customization')%plugin.name, show=True)
        from calibre.customize import InterfaceActionBase
        if isinstance(plugin, InterfaceActionBase) and not getattr(plugin,
                'actual_iaction_plugin_loaded', False):
            return error_dialog(self, _('Must restart'),
                    _('You must restart calibre before you can'
                        ' configure the <b>%s</b> plugin')%plugin.name, show=True)
        plugin.do_user_config(self.parent())

    def _toggle_enabled_clicked(self):
        display_plugin = self._selected_display_plugin()
        plugin = display_plugin.plugin
        if not plugin.can_be_disabled:
            return error_dialog(self,_('Plugin cannot be disabled'),
                         _('The plugin: %s cannot be disabled')%plugin.name, show=True)
        if is_disabled(plugin):
            enable_plugin(plugin)
        else:
            disable_plugin(plugin)
        self.model.refresh_plugin(display_plugin)

    def _read_version_history_html(self, forum_link):
        br = browser()
        br.set_handle_gzip(True)
        try:
            raw = br.open_novisit(forum_link).read()
            if not raw:
                return None
        except:
            traceback.print_exc()
            return None
        raw = raw.decode('utf-8', errors='replace')
        root = html.fromstring(raw)
        spoiler_nodes = root.xpath('//div[@class="smallfont" and strong="Spoiler"]')
        for spoiler_node in spoiler_nodes:
            try:
                if spoiler_node.getprevious() is None:
                    # This is a spoiler node that has been indented using [INDENT]
                    # Need to go up to parent div, then previous node to get header
                    heading_node = spoiler_node.getparent().getprevious()
                else:
                    # This is a spoiler node after a BR tag from the heading
                    heading_node = spoiler_node.getprevious().getprevious()
                if heading_node is None:
                    continue
                if heading_node.text_content().lower().find('version history') != -1:
                    div_node = spoiler_node.xpath('div')[0]
                    text = html.tostring(div_node, method='html', encoding=unicode)
                    return re.sub('<div\s.*?>', '<div>', text)
            except:
                if DEBUG:
                    prints('======= MobileRead Parse Error =======')
                    traceback.print_exc()
                    prints(html.tostring(spoiler_node))
        return None

    def _read_zip_attachment_url(self, forum_link):
        br = browser()
        br.set_handle_gzip(True)
        try:
            raw = br.open_novisit(forum_link).read()
            if not raw:
                return None
        except:
            traceback.print_exc()
            return None
        raw = raw.decode('utf-8', errors='replace')
        root = html.fromstring(raw)
        attachment_nodes = root.xpath('//fieldset/table/tr/td/a')
        for attachment_node in attachment_nodes:
            try:
                filename = attachment_node.text_content().lower()
                if filename.find('.zip') != -1:
                    full_url = MR_URL + attachment_node.attrib['href']
                    return full_url
            except:
                if DEBUG:
                    prints('======= MobileRead Parse Error =======')
                    traceback.print_exc()
                    prints(html.tostring(attachment_node))
        return None

    def _download_zip(self, plugin_zip_url):
        from calibre.ptempfile import PersistentTemporaryFile
        br = browser()
        br.set_handle_gzip(True)
        raw = br.open_novisit(plugin_zip_url).read()
        pt = PersistentTemporaryFile('.zip')
        pt.write(raw)
        pt.close()
        return pt.name
Ejemplo n.º 3
0
class PluginUpdaterDialog(SizePersistedDialog):

    initial_extra_size = QSize(350, 100)
    forum_label_text = _('Plugin homepage')

    def __init__(self, gui, initial_filter=FILTER_UPDATE_AVAILABLE):
        SizePersistedDialog.__init__(self, gui, 'Plugin Updater plugin:plugin updater dialog')
        self.gui = gui
        self.forum_link = None
        self.zip_url = None
        self.model = None
        self.do_restart = False
        self._initialize_controls()
        self._create_context_menu()

        display_plugins = read_available_plugins()

        if display_plugins:
            self.model = DisplayPluginModel(display_plugins)
            self.proxy_model = DisplayPluginSortFilterModel(self)
            self.proxy_model.setSourceModel(self.model)
            self.plugin_view.setModel(self.proxy_model)
            self.plugin_view.resizeColumnsToContents()
            self.plugin_view.selectionModel().currentRowChanged.connect(self._plugin_current_changed)
            self.plugin_view.doubleClicked.connect(self.install_button.click)
            self.filter_combo.setCurrentIndex(initial_filter)
            self._select_and_focus_view()
        else:
            error_dialog(self.gui, _('Update Check Failed'),
                        _('Unable to reach the plugin index page.'),
                        det_msg=INDEX_URL, show=True)
            self.filter_combo.setEnabled(False)
        # Cause our dialog size to be restored from prefs or created on first usage
        self.resize_dialog()

    def _initialize_controls(self):
        self.setWindowTitle(_('User plugins'))
        self.setWindowIcon(QIcon(I('plugins/plugin_updater.png')))
        layout = QVBoxLayout(self)
        self.setLayout(layout)
        title_layout = ImageTitleLayout(self, 'plugins/plugin_updater.png',
                _('User Plugins'))
        layout.addLayout(title_layout)

        header_layout = QHBoxLayout()
        layout.addLayout(header_layout)
        self.filter_combo = PluginFilterComboBox(self)
        self.filter_combo.setMinimumContentsLength(20)
        self.filter_combo.currentIndexChanged[int].connect(self._filter_combo_changed)
        header_layout.addWidget(QLabel(_('Filter list of plugins')+':', self))
        header_layout.addWidget(self.filter_combo)
        header_layout.addStretch(10)

        # filter plugins by name
        header_layout.addWidget(QLabel(_('Filter by name')+':', self))
        self.filter_by_name_lineedit = QLineEdit(self)
        self.filter_by_name_lineedit.setText("")
        self.filter_by_name_lineedit.textChanged.connect(self._filter_name_lineedit_changed)

        header_layout.addWidget(self.filter_by_name_lineedit)

        self.plugin_view = QTableView(self)
        self.plugin_view.horizontalHeader().setStretchLastSection(True)
        self.plugin_view.setSelectionBehavior(QAbstractItemView.SelectRows)
        self.plugin_view.setSelectionMode(QAbstractItemView.SingleSelection)
        self.plugin_view.setAlternatingRowColors(True)
        self.plugin_view.setSortingEnabled(True)
        self.plugin_view.setIconSize(QSize(28, 28))
        layout.addWidget(self.plugin_view)

        details_layout = QHBoxLayout()
        layout.addLayout(details_layout)
        forum_label = self.forum_label = QLabel('')
        forum_label.setTextInteractionFlags(Qt.LinksAccessibleByMouse | Qt.LinksAccessibleByKeyboard)
        forum_label.linkActivated.connect(self._forum_label_activated)
        details_layout.addWidget(QLabel(_('Description')+':', self), 0, Qt.AlignLeft)
        details_layout.addWidget(forum_label, 1, Qt.AlignRight)

        self.description = QLabel(self)
        self.description.setFrameStyle(QFrame.Panel | QFrame.Sunken)
        self.description.setAlignment(Qt.AlignTop | Qt.AlignLeft)
        self.description.setMinimumHeight(40)
        self.description.setWordWrap(True)
        layout.addWidget(self.description)

        self.button_box = QDialogButtonBox(QDialogButtonBox.Close)
        self.button_box.rejected.connect(self.reject)
        self.finished.connect(self._finished)
        self.install_button = self.button_box.addButton(_('&Install'), QDialogButtonBox.AcceptRole)
        self.install_button.setToolTip(_('Install the selected plugin'))
        self.install_button.clicked.connect(self._install_clicked)
        self.install_button.setEnabled(False)
        self.configure_button = self.button_box.addButton(' '+_('&Customize plugin ')+' ', QDialogButtonBox.ResetRole)
        self.configure_button.setToolTip(_('Customize the options for this plugin'))
        self.configure_button.clicked.connect(self._configure_clicked)
        self.configure_button.setEnabled(False)
        layout.addWidget(self.button_box)

    def update_forum_label(self):
        txt = ''
        if self.forum_link:
            txt = '<a href="%s">%s</a>' % (self.forum_link, self.forum_label_text)
        self.forum_label.setText(txt)

    def _create_context_menu(self):
        self.plugin_view.setContextMenuPolicy(Qt.ActionsContextMenu)
        self.install_action = QAction(QIcon(I('plugins/plugin_upgrade_ok.png')), _('&Install'), self)
        self.install_action.setToolTip(_('Install the selected plugin'))
        self.install_action.triggered.connect(self._install_clicked)
        self.install_action.setEnabled(False)
        self.plugin_view.addAction(self.install_action)
        self.history_action = QAction(QIcon(I('chapters.png')), _('Version &History'), self)
        self.history_action.setToolTip(_('Show history of changes to this plugin'))
        self.history_action.triggered.connect(self._history_clicked)
        self.history_action.setEnabled(False)
        self.plugin_view.addAction(self.history_action)
        self.forum_action = QAction(QIcon(I('plugins/mobileread.png')), _('Plugin &Forum Thread'), self)
        self.forum_action.triggered.connect(self._forum_label_activated)
        self.forum_action.setEnabled(False)
        self.plugin_view.addAction(self.forum_action)

        sep1 = QAction(self)
        sep1.setSeparator(True)
        self.plugin_view.addAction(sep1)

        self.toggle_enabled_action = QAction(_('Enable/&Disable plugin'), self)
        self.toggle_enabled_action.setToolTip(_('Enable or disable this plugin'))
        self.toggle_enabled_action.triggered.connect(self._toggle_enabled_clicked)
        self.toggle_enabled_action.setEnabled(False)
        self.plugin_view.addAction(self.toggle_enabled_action)
        self.uninstall_action = QAction(_('&Remove plugin'), self)
        self.uninstall_action.setToolTip(_('Uninstall the selected plugin'))
        self.uninstall_action.triggered.connect(self._uninstall_clicked)
        self.uninstall_action.setEnabled(False)
        self.plugin_view.addAction(self.uninstall_action)

        sep2 = QAction(self)
        sep2.setSeparator(True)
        self.plugin_view.addAction(sep2)

        self.donate_enabled_action = QAction(QIcon(I('donate.png')), _('Donate to developer'), self)
        self.donate_enabled_action.setToolTip(_('Donate to the developer of this plugin'))
        self.donate_enabled_action.triggered.connect(self._donate_clicked)
        self.donate_enabled_action.setEnabled(False)
        self.plugin_view.addAction(self.donate_enabled_action)

        sep3 = QAction(self)
        sep3.setSeparator(True)
        self.plugin_view.addAction(sep3)

        self.configure_action = QAction(QIcon(I('config.png')), _('&Customize plugin'), self)
        self.configure_action.setToolTip(_('Customize the options for this plugin'))
        self.configure_action.triggered.connect(self._configure_clicked)
        self.configure_action.setEnabled(False)
        self.plugin_view.addAction(self.configure_action)

    def _finished(self, *args):
        if self.model:
            update_plugins = filter(filter_upgradeable_plugins, self.model.display_plugins)
            self.gui.recalc_update_label(len(update_plugins))

    def _plugin_current_changed(self, current, previous):
        if current.isValid():
            actual_idx = self.proxy_model.mapToSource(current)
            display_plugin = self.model.display_plugins[actual_idx.row()]
            self.description.setText(display_plugin.description)
            self.forum_link = display_plugin.forum_link
            self.zip_url = display_plugin.zip_url
            self.forum_action.setEnabled(bool(self.forum_link))
            self.install_button.setEnabled(display_plugin.is_valid_to_install())
            self.install_action.setEnabled(self.install_button.isEnabled())
            self.uninstall_action.setEnabled(display_plugin.is_installed())
            self.history_action.setEnabled(display_plugin.has_changelog)
            self.configure_button.setEnabled(display_plugin.is_installed())
            self.configure_action.setEnabled(self.configure_button.isEnabled())
            self.toggle_enabled_action.setEnabled(display_plugin.is_installed())
            self.donate_enabled_action.setEnabled(bool(display_plugin.donation_link))
        else:
            self.description.setText('')
            self.forum_link = None
            self.zip_url = None
            self.forum_action.setEnabled(False)
            self.install_button.setEnabled(False)
            self.install_action.setEnabled(False)
            self.uninstall_action.setEnabled(False)
            self.history_action.setEnabled(False)
            self.configure_button.setEnabled(False)
            self.configure_action.setEnabled(False)
            self.toggle_enabled_action.setEnabled(False)
            self.donate_enabled_action.setEnabled(False)
        self.update_forum_label()

    def _donate_clicked(self):
        plugin = self._selected_display_plugin()
        if plugin and plugin.donation_link:
            open_url(QUrl(plugin.donation_link))

    def _select_and_focus_view(self, change_selection=True):
        if change_selection and self.plugin_view.model().rowCount() > 0:
            self.plugin_view.selectRow(0)
        else:
            idx = self.plugin_view.selectionModel().currentIndex()
            self._plugin_current_changed(idx, 0)
        self.plugin_view.setFocus()

    def _filter_combo_changed(self, idx):
        self.filter_by_name_lineedit.setText("")  # clear the name filter text when a different group was selected
        self.proxy_model.set_filter_criteria(idx)
        if idx == FILTER_NOT_INSTALLED:
            self.plugin_view.sortByColumn(5, Qt.DescendingOrder)
        else:
            self.plugin_view.sortByColumn(0, Qt.AscendingOrder)
        self._select_and_focus_view()

    def _filter_name_lineedit_changed(self, text):
        self.proxy_model.set_filter_text(text)  # set the filter text for filterAcceptsRow

    def _forum_label_activated(self):
        if self.forum_link:
            open_url(QUrl(self.forum_link))

    def _selected_display_plugin(self):
        idx = self.plugin_view.selectionModel().currentIndex()
        actual_idx = self.proxy_model.mapToSource(idx)
        return self.model.display_plugins[actual_idx.row()]

    def _uninstall_plugin(self, name_to_remove):
        if DEBUG:
            prints('Removing plugin: ', name_to_remove)
        remove_plugin(name_to_remove)
        # Make sure that any other plugins that required this plugin
        # to be uninstalled first have the requirement removed
        for display_plugin in self.model.display_plugins:
            # Make sure we update the status and display of the
            # plugin we just uninstalled
            if name_to_remove in display_plugin.uninstall_plugins:
                if DEBUG:
                    prints('Removing uninstall dependency for: ', display_plugin.name)
                display_plugin.uninstall_plugins.remove(name_to_remove)
            if display_plugin.name == name_to_remove:
                if DEBUG:
                    prints('Resetting plugin to uninstalled status: ', display_plugin.name)
                display_plugin.installed_version = None
                display_plugin.plugin = None
                display_plugin.uninstall_plugins = []
                if self.proxy_model.filter_criteria not in [FILTER_INSTALLED, FILTER_UPDATE_AVAILABLE]:
                    self.model.refresh_plugin(display_plugin)

    def _uninstall_clicked(self):
        display_plugin = self._selected_display_plugin()
        if not question_dialog(self, _('Are you sure?'), '<p>'+
                   _('Are you sure you want to uninstall the <b>%s</b> plugin?')%display_plugin.name,
                   show_copy_button=False):
            return
        self._uninstall_plugin(display_plugin.name)
        if self.proxy_model.filter_criteria in [FILTER_INSTALLED, FILTER_UPDATE_AVAILABLE]:
            self.model.reset()
            self._select_and_focus_view()
        else:
            self._select_and_focus_view(change_selection=False)

    def _install_clicked(self):
        display_plugin = self._selected_display_plugin()
        if not question_dialog(self, _('Install %s')%display_plugin.name, '<p>' +
                _('Installing plugins is a <b>security risk</b>. '
                'Plugins can contain a virus/malware. '
                    'Only install it if you got it from a trusted source.'
                    ' Are you sure you want to proceed?'),
                show_copy_button=False):
            return

        if display_plugin.uninstall_plugins:
            uninstall_names = list(display_plugin.uninstall_plugins)
            if DEBUG:
                prints('Uninstalling plugin: ', ', '.join(uninstall_names))
            for name_to_remove in uninstall_names:
                self._uninstall_plugin(name_to_remove)

        plugin_zip_url = display_plugin.zip_url
        if DEBUG:
            prints('Downloading plugin zip attachment: ', plugin_zip_url)
        self.gui.status_bar.showMessage(_('Downloading plugin zip attachment: %s') % plugin_zip_url)
        zip_path = self._download_zip(plugin_zip_url)

        if DEBUG:
            prints('Installing plugin: ', zip_path)
        self.gui.status_bar.showMessage(_('Installing plugin: %s') % zip_path)

        do_restart = False
        try:
            try:
                plugin = add_plugin(zip_path)
            except NameConflict as e:
                return error_dialog(self.gui, _('Already exists'),
                        unicode(e), show=True)
            # Check for any toolbars to add to.
            widget = ConfigWidget(self.gui)
            widget.gui = self.gui
            widget.check_for_add_to_toolbars(plugin)
            self.gui.status_bar.showMessage(_('Plugin installed: %s') % display_plugin.name)
            d = info_dialog(self.gui, _('Success'),
                    _('Plugin <b>{0}</b> successfully installed under <b>'
                        ' {1} plugins</b>. You may have to restart calibre '
                        'for the plugin to take effect.').format(plugin.name, plugin.type),
                    show_copy_button=False)
            b = d.bb.addButton(_('Restart calibre now'), d.bb.AcceptRole)
            b.setIcon(QIcon(I('lt.png')))
            d.do_restart = False
            def rf():
                d.do_restart = True
            b.clicked.connect(rf)
            d.set_details('')
            d.exec_()
            b.clicked.disconnect()
            do_restart = d.do_restart

            display_plugin.plugin = plugin
            # We cannot read the 'actual' version information as the plugin will not be loaded yet
            display_plugin.installed_version = display_plugin.available_version
        except:
            if DEBUG:
                prints('ERROR occurred while installing plugin: %s'%display_plugin.name)
                traceback.print_exc()
            error_dialog(self.gui, _('Install Plugin Failed'),
                         _('A problem occurred while installing this plugin.'
                           ' This plugin will now be uninstalled.'
                           ' Please post the error message in details below into'
                           ' the forum thread for this plugin and restart Calibre.'),
                         det_msg=traceback.format_exc(), show=True)
            if DEBUG:
                prints('Due to error now uninstalling plugin: %s'%display_plugin.name)
            remove_plugin(display_plugin.name)
            display_plugin.plugin = None

        display_plugin.uninstall_plugins = []
        if self.proxy_model.filter_criteria in [FILTER_NOT_INSTALLED, FILTER_UPDATE_AVAILABLE]:
            self.model.reset()
            self._select_and_focus_view()
        else:
            self.model.refresh_plugin(display_plugin)
            self._select_and_focus_view(change_selection=False)
        if do_restart:
            self.do_restart = True
            self.accept()

    def _history_clicked(self):
        display_plugin = self._selected_display_plugin()
        text = self._read_version_history_html(display_plugin.forum_link)
        if text:
            dlg = VersionHistoryDialog(self, display_plugin.name, text)
            dlg.exec_()
        else:
            return error_dialog(self, _('Version history missing'),
                _('Unable to find the version history for %s')%display_plugin.name,
                show=True)

    def _configure_clicked(self):
        display_plugin = self._selected_display_plugin()
        plugin = display_plugin.plugin
        if not plugin.is_customizable():
            return info_dialog(self, _('Plugin not customizable'),
                _('Plugin: %s does not need customization')%plugin.name, show=True)
        from calibre.customize import InterfaceActionBase
        if isinstance(plugin, InterfaceActionBase) and not getattr(plugin,
                'actual_iaction_plugin_loaded', False):
            return error_dialog(self, _('Must restart'),
                    _('You must restart calibre before you can'
                        ' configure the <b>%s</b> plugin')%plugin.name, show=True)
        plugin.do_user_config(self.parent())

    def _toggle_enabled_clicked(self):
        display_plugin = self._selected_display_plugin()
        plugin = display_plugin.plugin
        if not plugin.can_be_disabled:
            return error_dialog(self,_('Plugin cannot be disabled'),
                         _('The plugin: %s cannot be disabled')%plugin.name, show=True)
        if is_disabled(plugin):
            enable_plugin(plugin)
        else:
            disable_plugin(plugin)
        self.model.refresh_plugin(display_plugin)

    def _read_version_history_html(self, forum_link):
        br = browser()
        br.set_handle_gzip(True)
        try:
            raw = br.open_novisit(forum_link).read()
            if not raw:
                return None
        except:
            traceback.print_exc()
            return None
        raw = raw.decode('utf-8', errors='replace')
        root = html.fromstring(raw)
        spoiler_nodes = root.xpath('//div[@class="smallfont" and strong="Spoiler"]')
        for spoiler_node in spoiler_nodes:
            try:
                if spoiler_node.getprevious() is None:
                    # This is a spoiler node that has been indented using [INDENT]
                    # Need to go up to parent div, then previous node to get header
                    heading_node = spoiler_node.getparent().getprevious()
                else:
                    # This is a spoiler node after a BR tag from the heading
                    heading_node = spoiler_node.getprevious().getprevious()
                if heading_node is None:
                    continue
                if heading_node.text_content().lower().find('version history') != -1:
                    div_node = spoiler_node.xpath('div')[0]
                    text = html.tostring(div_node, method='html', encoding=unicode)
                    return re.sub('<div\s.*?>', '<div>', text)
            except:
                if DEBUG:
                    prints('======= MobileRead Parse Error =======')
                    traceback.print_exc()
                    prints(html.tostring(spoiler_node))
        return None

    def _download_zip(self, plugin_zip_url):
        from calibre.ptempfile import PersistentTemporaryFile
        br = browser(user_agent='%s %s' % (__appname__, __version__))
        raw = br.open_novisit(plugin_zip_url).read()
        with PersistentTemporaryFile('.zip') as pt:
            pt.write(raw)
        return pt.name
Ejemplo n.º 4
0
class PluginUpdaterDialog(SizePersistedDialog):

    initial_extra_size = QSize(350, 100)

    def __init__(self, gui, initial_filter=FILTER_UPDATE_AVAILABLE):
        SizePersistedDialog.__init__(self, gui, "Plugin Updater plugin:plugin updater dialog")
        self.gui = gui
        self.forum_link = None
        self.model = None
        self.do_restart = False
        self._initialize_controls()
        self._create_context_menu()

        display_plugins = read_available_plugins()

        if display_plugins:
            self.model = DisplayPluginModel(display_plugins)
            self.proxy_model = DisplayPluginSortFilterModel(self)
            self.proxy_model.setSourceModel(self.model)
            self.plugin_view.setModel(self.proxy_model)
            self.plugin_view.resizeColumnsToContents()
            self.plugin_view.selectionModel().currentRowChanged.connect(self._plugin_current_changed)
            self.plugin_view.doubleClicked.connect(self.install_button.click)
            self.filter_combo.setCurrentIndex(initial_filter)
            self._select_and_focus_view()
        else:
            error_dialog(
                self.gui,
                _("Update Check Failed"),
                _("Unable to reach the MobileRead plugins forum index page."),
                det_msg=MR_INDEX_URL,
                show=True,
            )
            self.filter_combo.setEnabled(False)
        # Cause our dialog size to be restored from prefs or created on first usage
        self.resize_dialog()

    def _initialize_controls(self):
        self.setWindowTitle(_("User plugins"))
        self.setWindowIcon(QIcon(I("plugins/plugin_updater.png")))
        layout = QVBoxLayout(self)
        self.setLayout(layout)
        title_layout = ImageTitleLayout(self, "plugins/plugin_updater.png", _("User Plugins"))
        layout.addLayout(title_layout)

        header_layout = QHBoxLayout()
        layout.addLayout(header_layout)
        self.filter_combo = PluginFilterComboBox(self)
        self.filter_combo.setMinimumContentsLength(20)
        self.filter_combo.currentIndexChanged[int].connect(self._filter_combo_changed)
        header_layout.addWidget(QLabel(_("Filter list of plugins") + ":", self))
        header_layout.addWidget(self.filter_combo)
        header_layout.addStretch(10)

        self.plugin_view = QTableView(self)
        self.plugin_view.horizontalHeader().setStretchLastSection(True)
        self.plugin_view.setSelectionBehavior(QAbstractItemView.SelectRows)
        self.plugin_view.setSelectionMode(QAbstractItemView.SingleSelection)
        self.plugin_view.setAlternatingRowColors(True)
        self.plugin_view.setSortingEnabled(True)
        self.plugin_view.setIconSize(QSize(28, 28))
        layout.addWidget(self.plugin_view)

        details_layout = QHBoxLayout()
        layout.addLayout(details_layout)
        forum_label = QLabel('<a href="http://www.foo.com/">Plugin Forum Thread</a>', self)
        forum_label.setTextInteractionFlags(Qt.LinksAccessibleByMouse | Qt.LinksAccessibleByKeyboard)
        forum_label.linkActivated.connect(self._forum_label_activated)
        details_layout.addWidget(QLabel(_("Description") + ":", self), 0, Qt.AlignLeft)
        details_layout.addWidget(forum_label, 1, Qt.AlignRight)

        self.description = QLabel(self)
        self.description.setFrameStyle(QFrame.Panel | QFrame.Sunken)
        self.description.setAlignment(Qt.AlignTop | Qt.AlignLeft)
        self.description.setMinimumHeight(40)
        self.description.setWordWrap(True)
        layout.addWidget(self.description)

        self.button_box = QDialogButtonBox(QDialogButtonBox.Close)
        self.button_box.rejected.connect(self.reject)
        self.finished.connect(self._finished)
        self.install_button = self.button_box.addButton(_("&Install"), QDialogButtonBox.AcceptRole)
        self.install_button.setToolTip(_("Install the selected plugin"))
        self.install_button.clicked.connect(self._install_clicked)
        self.install_button.setEnabled(False)
        self.configure_button = self.button_box.addButton(
            " " + _("&Customize plugin ") + " ", QDialogButtonBox.ResetRole
        )
        self.configure_button.setToolTip(_("Customize the options for this plugin"))
        self.configure_button.clicked.connect(self._configure_clicked)
        self.configure_button.setEnabled(False)
        layout.addWidget(self.button_box)

    def _create_context_menu(self):
        self.plugin_view.setContextMenuPolicy(Qt.ActionsContextMenu)
        self.install_action = QAction(QIcon(I("plugins/plugin_upgrade_ok.png")), _("&Install"), self)
        self.install_action.setToolTip(_("Install the selected plugin"))
        self.install_action.triggered.connect(self._install_clicked)
        self.install_action.setEnabled(False)
        self.plugin_view.addAction(self.install_action)
        self.history_action = QAction(QIcon(I("chapters.png")), _("Version &History"), self)
        self.history_action.setToolTip(_("Show history of changes to this plugin"))
        self.history_action.triggered.connect(self._history_clicked)
        self.history_action.setEnabled(False)
        self.plugin_view.addAction(self.history_action)
        self.forum_action = QAction(QIcon(I("plugins/mobileread.png")), _("Plugin &Forum Thread"), self)
        self.forum_action.triggered.connect(self._forum_label_activated)
        self.forum_action.setEnabled(False)
        self.plugin_view.addAction(self.forum_action)

        sep1 = QAction(self)
        sep1.setSeparator(True)
        self.plugin_view.addAction(sep1)

        self.toggle_enabled_action = QAction(_("Enable/&Disable plugin"), self)
        self.toggle_enabled_action.setToolTip(_("Enable or disable this plugin"))
        self.toggle_enabled_action.triggered.connect(self._toggle_enabled_clicked)
        self.toggle_enabled_action.setEnabled(False)
        self.plugin_view.addAction(self.toggle_enabled_action)
        self.uninstall_action = QAction(_("&Remove plugin"), self)
        self.uninstall_action.setToolTip(_("Uninstall the selected plugin"))
        self.uninstall_action.triggered.connect(self._uninstall_clicked)
        self.uninstall_action.setEnabled(False)
        self.plugin_view.addAction(self.uninstall_action)

        sep2 = QAction(self)
        sep2.setSeparator(True)
        self.plugin_view.addAction(sep2)

        self.donate_enabled_action = QAction(QIcon(I("donate.png")), _("Donate to developer"), self)
        self.donate_enabled_action.setToolTip(_("Donate to the developer of this plugin"))
        self.donate_enabled_action.triggered.connect(self._donate_clicked)
        self.donate_enabled_action.setEnabled(False)
        self.plugin_view.addAction(self.donate_enabled_action)

        sep3 = QAction(self)
        sep3.setSeparator(True)
        self.plugin_view.addAction(sep3)

        self.configure_action = QAction(QIcon(I("config.png")), _("&Customize plugin"), self)
        self.configure_action.setToolTip(_("Customize the options for this plugin"))
        self.configure_action.triggered.connect(self._configure_clicked)
        self.configure_action.setEnabled(False)
        self.plugin_view.addAction(self.configure_action)

    def _finished(self, *args):
        if self.model:
            update_plugins = filter(filter_upgradeable_plugins, self.model.display_plugins)
            self.gui.recalc_update_label(len(update_plugins))

    def _plugin_current_changed(self, current, previous):
        if current.isValid():
            actual_idx = self.proxy_model.mapToSource(current)
            display_plugin = self.model.display_plugins[actual_idx.row()]
            self.description.setText(display_plugin.description)
            self.forum_link = display_plugin.forum_link
            self.forum_action.setEnabled(bool(self.forum_link))
            self.install_button.setEnabled(display_plugin.is_valid_to_install())
            self.install_action.setEnabled(self.install_button.isEnabled())
            self.uninstall_action.setEnabled(display_plugin.is_installed())
            self.history_action.setEnabled(display_plugin.has_changelog)
            self.configure_button.setEnabled(display_plugin.is_installed())
            self.configure_action.setEnabled(self.configure_button.isEnabled())
            self.toggle_enabled_action.setEnabled(display_plugin.is_installed())
            self.donate_enabled_action.setEnabled(bool(display_plugin.donation_link))
        else:
            self.description.setText("")
            self.forum_link = None
            self.forum_action.setEnabled(False)
            self.install_button.setEnabled(False)
            self.install_action.setEnabled(False)
            self.uninstall_action.setEnabled(False)
            self.history_action.setEnabled(False)
            self.configure_button.setEnabled(False)
            self.configure_action.setEnabled(False)
            self.toggle_enabled_action.setEnabled(False)
            self.donate_enabled_action.setEnabled(False)

    def _donate_clicked(self):
        plugin = self._selected_display_plugin()
        if plugin and plugin.donation_link:
            open_url(QUrl(plugin.donation_link))

    def _select_and_focus_view(self, change_selection=True):
        if change_selection and self.plugin_view.model().rowCount() > 0:
            self.plugin_view.selectRow(0)
        else:
            idx = self.plugin_view.selectionModel().currentIndex()
            self._plugin_current_changed(idx, 0)
        self.plugin_view.setFocus()

    def _filter_combo_changed(self, idx):
        self.proxy_model.set_filter_criteria(idx)
        if idx == FILTER_NOT_INSTALLED:
            self.plugin_view.sortByColumn(5, Qt.DescendingOrder)
        else:
            self.plugin_view.sortByColumn(0, Qt.AscendingOrder)
        self._select_and_focus_view()

    def _forum_label_activated(self):
        if self.forum_link:
            open_url(QUrl(self.forum_link))

    def _selected_display_plugin(self):
        idx = self.plugin_view.selectionModel().currentIndex()
        actual_idx = self.proxy_model.mapToSource(idx)
        return self.model.display_plugins[actual_idx.row()]

    def _uninstall_plugin(self, name_to_remove):
        if DEBUG:
            prints("Removing plugin: ", name_to_remove)
        remove_plugin(name_to_remove)
        # Make sure that any other plugins that required this plugin
        # to be uninstalled first have the requirement removed
        for display_plugin in self.model.display_plugins:
            # Make sure we update the status and display of the
            # plugin we just uninstalled
            if name_to_remove in display_plugin.uninstall_plugins:
                if DEBUG:
                    prints("Removing uninstall dependency for: ", display_plugin.name)
                display_plugin.uninstall_plugins.remove(name_to_remove)
            if display_plugin.name == name_to_remove:
                if DEBUG:
                    prints("Resetting plugin to uninstalled status: ", display_plugin.name)
                display_plugin.installed_version = None
                display_plugin.plugin = None
                display_plugin.uninstall_plugins = []
                if self.proxy_model.filter_criteria not in [FILTER_INSTALLED, FILTER_UPDATE_AVAILABLE]:
                    self.model.refresh_plugin(display_plugin)

    def _uninstall_clicked(self):
        display_plugin = self._selected_display_plugin()
        if not question_dialog(
            self,
            _("Are you sure?"),
            "<p>" + _("Are you sure you want to uninstall the <b>%s</b> plugin?") % display_plugin.name,
            show_copy_button=False,
        ):
            return
        self._uninstall_plugin(display_plugin.name)
        if self.proxy_model.filter_criteria in [FILTER_INSTALLED, FILTER_UPDATE_AVAILABLE]:
            self.model.reset()
            self._select_and_focus_view()
        else:
            self._select_and_focus_view(change_selection=False)

    def _install_clicked(self):
        display_plugin = self._selected_display_plugin()
        if not question_dialog(
            self,
            _("Install %s") % display_plugin.name,
            "<p>"
            + _(
                "Installing plugins is a <b>security risk</b>. "
                "Plugins can contain a virus/malware. "
                "Only install it if you got it from a trusted source."
                " Are you sure you want to proceed?"
            ),
            show_copy_button=False,
        ):
            return

        if display_plugin.uninstall_plugins:
            uninstall_names = list(display_plugin.uninstall_plugins)
            if DEBUG:
                prints("Uninstalling plugin: ", ", ".join(uninstall_names))
            for name_to_remove in uninstall_names:
                self._uninstall_plugin(name_to_remove)

        if DEBUG:
            prints("Locating zip file for %s: %s" % (display_plugin.name, display_plugin.forum_link))
        self.gui.status_bar.showMessage(
            _("Locating zip file for %(name)s: %(link)s")
            % dict(name=display_plugin.name, link=display_plugin.forum_link)
        )
        plugin_zip_url = self._read_zip_attachment_url(display_plugin.forum_link)
        if not plugin_zip_url:
            return error_dialog(
                self.gui,
                _("Install Plugin Failed"),
                _("Unable to locate a plugin zip file for <b>%s</b>") % display_plugin.name,
                det_msg=display_plugin.forum_link,
                show=True,
            )

        if DEBUG:
            prints("Downloading plugin zip attachment: ", plugin_zip_url)
        self.gui.status_bar.showMessage(_("Downloading plugin zip attachment: %s") % plugin_zip_url)
        zip_path = self._download_zip(plugin_zip_url)

        if DEBUG:
            prints("Installing plugin: ", zip_path)
        self.gui.status_bar.showMessage(_("Installing plugin: %s") % zip_path)

        do_restart = False
        try:
            try:
                plugin = add_plugin(zip_path)
            except NameConflict as e:
                return error_dialog(self.gui, _("Already exists"), unicode(e), show=True)
            # Check for any toolbars to add to.
            widget = ConfigWidget(self.gui)
            widget.gui = self.gui
            widget.check_for_add_to_toolbars(plugin)
            self.gui.status_bar.showMessage(_("Plugin installed: %s") % display_plugin.name)
            d = info_dialog(
                self.gui,
                _("Success"),
                _(
                    "Plugin <b>{0}</b> successfully installed under <b>"
                    " {1} plugins</b>. You may have to restart calibre "
                    "for the plugin to take effect."
                ).format(plugin.name, plugin.type),
                show_copy_button=False,
            )
            b = d.bb.addButton(_("Restart calibre now"), d.bb.AcceptRole)
            b.setIcon(QIcon(I("lt.png")))
            d.do_restart = False

            def rf():
                d.do_restart = True

            b.clicked.connect(rf)
            d.set_details("")
            d.exec_()
            b.clicked.disconnect()
            do_restart = d.do_restart

            display_plugin.plugin = plugin
            # We cannot read the 'actual' version information as the plugin will not be loaded yet
            display_plugin.installed_version = display_plugin.available_version
        except:
            if DEBUG:
                prints("ERROR occurred while installing plugin: %s" % display_plugin.name)
                traceback.print_exc()
            error_dialog(
                self.gui,
                _("Install Plugin Failed"),
                _(
                    "A problem occurred while installing this plugin."
                    " This plugin will now be uninstalled."
                    " Please post the error message in details below into"
                    " the forum thread for this plugin and restart Calibre."
                ),
                det_msg=traceback.format_exc(),
                show=True,
            )
            if DEBUG:
                prints("Due to error now uninstalling plugin: %s" % display_plugin.name)
                remove_plugin(display_plugin.name)
                display_plugin.plugin = None

        display_plugin.uninstall_plugins = []
        if self.proxy_model.filter_criteria in [FILTER_NOT_INSTALLED, FILTER_UPDATE_AVAILABLE]:
            self.model.reset()
            self._select_and_focus_view()
        else:
            self.model.refresh_plugin(display_plugin)
            self._select_and_focus_view(change_selection=False)
        if do_restart:
            self.do_restart = True
            self.accept()

    def _history_clicked(self):
        display_plugin = self._selected_display_plugin()
        text = self._read_version_history_html(display_plugin.forum_link)
        if text:
            dlg = VersionHistoryDialog(self, display_plugin.name, text)
            dlg.exec_()
        else:
            return error_dialog(
                self,
                _("Version history missing"),
                _("Unable to find the version history for %s") % display_plugin.name,
                show=True,
            )

    def _configure_clicked(self):
        display_plugin = self._selected_display_plugin()
        plugin = display_plugin.plugin
        if not plugin.is_customizable():
            return info_dialog(
                self, _("Plugin not customizable"), _("Plugin: %s does not need customization") % plugin.name, show=True
            )
        from calibre.customize import InterfaceActionBase

        if isinstance(plugin, InterfaceActionBase) and not getattr(plugin, "actual_iaction_plugin_loaded", False):
            return error_dialog(
                self,
                _("Must restart"),
                _("You must restart calibre before you can" " configure the <b>%s</b> plugin") % plugin.name,
                show=True,
            )
        plugin.do_user_config(self.parent())

    def _toggle_enabled_clicked(self):
        display_plugin = self._selected_display_plugin()
        plugin = display_plugin.plugin
        if not plugin.can_be_disabled:
            return error_dialog(
                self, _("Plugin cannot be disabled"), _("The plugin: %s cannot be disabled") % plugin.name, show=True
            )
        if is_disabled(plugin):
            enable_plugin(plugin)
        else:
            disable_plugin(plugin)
        self.model.refresh_plugin(display_plugin)

    def _read_version_history_html(self, forum_link):
        br = browser()
        br.set_handle_gzip(True)
        try:
            raw = br.open_novisit(forum_link).read()
            if not raw:
                return None
        except:
            traceback.print_exc()
            return None
        raw = raw.decode("utf-8", errors="replace")
        root = html.fromstring(raw)
        spoiler_nodes = root.xpath('//div[@class="smallfont" and strong="Spoiler"]')
        for spoiler_node in spoiler_nodes:
            try:
                if spoiler_node.getprevious() is None:
                    # This is a spoiler node that has been indented using [INDENT]
                    # Need to go up to parent div, then previous node to get header
                    heading_node = spoiler_node.getparent().getprevious()
                else:
                    # This is a spoiler node after a BR tag from the heading
                    heading_node = spoiler_node.getprevious().getprevious()
                if heading_node is None:
                    continue
                if heading_node.text_content().lower().find("version history") != -1:
                    div_node = spoiler_node.xpath("div")[0]
                    text = html.tostring(div_node, method="html", encoding=unicode)
                    return re.sub("<div\s.*?>", "<div>", text)
            except:
                if DEBUG:
                    prints("======= MobileRead Parse Error =======")
                    traceback.print_exc()
                    prints(html.tostring(spoiler_node))
        return None

    def _read_zip_attachment_url(self, forum_link):
        br = browser()
        br.set_handle_gzip(True)
        try:
            raw = br.open_novisit(forum_link).read()
            if not raw:
                return None
        except:
            traceback.print_exc()
            return None
        raw = raw.decode("utf-8", errors="replace")
        root = html.fromstring(raw)
        attachment_nodes = root.xpath("//fieldset/table/tr/td/a")
        for attachment_node in attachment_nodes:
            try:
                filename = attachment_node.text_content().lower()
                if filename.find(".zip") != -1:
                    full_url = MR_URL + attachment_node.attrib["href"]
                    return full_url
            except:
                if DEBUG:
                    prints("======= MobileRead Parse Error =======")
                    traceback.print_exc()
                    prints(html.tostring(attachment_node))
        return None

    def _download_zip(self, plugin_zip_url):
        from calibre.ptempfile import PersistentTemporaryFile

        br = browser()
        br.set_handle_gzip(True)
        raw = br.open_novisit(plugin_zip_url).read()
        pt = PersistentTemporaryFile(".zip")
        pt.write(raw)
        pt.close()
        return pt.name