/
browser.py
270 lines (195 loc) · 7.9 KB
/
browser.py
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# -*- coding: UTF-8 -*-
import os
import sys
import urltools
from PyQt4.QtCore import Qt, QEvent
from PyQt4 import QtCore, QtGui, QtWebKit
from PyQt4.QtWebKit import QWebSettings, QWebPage
from warcnam import WarcNetworkAccessManager, qstring_to_str
from uibrowser import Ui_Browser
from warc import Warc
BASE_DIR = os.path.dirname(os.path.abspath(__file__))
WARC_DIR = os.path.join(BASE_DIR, "warc")
class WebElementHighlighter(QtGui.QWidget):
selection_color = QtGui.QColor(255, 0, 0)
highlight_color = QtGui.QColor(0, 0, 255)
_elements = None
_highlighted_elements = None
def __init__(self, parent):
super(WebElementHighlighter, self).__init__(parent)
self._elements = []
self._highlighted_elements = []
self.initUI()
def add_element(self, element):
try:
self._elements.remove(element)
except ValueError:
pass
self._elements.append(element)
self.update()
def remove_element(self, element):
try:
self._elements.remove(element)
except ValueError:
pass
self.update()
def clear_elements(self):
del self._elements[:]
del self._highlighted_elements[:]
self.update()
def highlight_element(self, element):
self.highlight_elements([element] if element else [])
def highlight_elements(self, element_list):
new_list = []
if element_list:
new_list = element_list
if cmp(new_list, self._highlighted_elements) == 0:
return
self._highlighted_elements = new_list[:]
self.update()
def initUI(self):
self.setMinimumSize(300, 300)
self.setAttribute(Qt.WA_TransparentForMouseEvents, True)
self.setSizePolicy(QtGui.QSizePolicy.Preferred, \
QtGui.QSizePolicy.Preferred)
def paintEvent(self, e):
qp = QtGui.QPainter()
qp.begin(self)
self.drawWidget(qp)
qp.end()
def drawWidget(self, qp):
selections = [
(self.selection_color, self._get_element_rect(e))
for e in self._elements
] + [
(self.highlight_color, self._get_element_rect(e))
for e in self._highlighted_elements
]
for sel in selections:
qp.setPen(sel[0])
qp.drawRect(sel[1])
def _get_element_rect(self, e):
view_rect = e.webFrame().geometry()
sgh = e.webFrame().scrollBarGeometry(Qt.Horizontal)
sgv = e.webFrame().scrollBarGeometry(Qt.Vertical)
view_rect.setWidth(view_rect.width() - sgv.width())
view_rect.setHeight(view_rect.height() - sgh.height())
rect = e.geometry()
sp = e.webFrame().scrollPosition()
rect.translate(-sp.x(), -sp.y())
if rect.x() + rect.width() > view_rect.x() + view_rect.width():
rect.setRight(view_rect.x() + view_rect.width())
if rect.y() + rect.height() > view_rect.y() + view_rect.height():
rect.setBottom(view_rect.y() + view_rect.height())
return rect
class Browser(QtGui.QMainWindow):
BROWSER_MODE_NORMAL = 1
BROWSER_MODE_SELECTION = 2
_browser_mode = None
_ui = None
_warc_nan = None
_highlighter = None
_selecting = False
def __init__(self):
QtGui.QMainWindow.__init__(self)
self._ui = Ui_Browser()
self._ui.setupUi(self)
self._highlighter = WebElementHighlighter(self._ui.frame)
self._warc_nan = WarcNetworkAccessManager()
self.switch_mode(self.BROWSER_MODE_NORMAL)
self._ui.web_view.installEventFilter(self)
self._ui.web_view.setMouseTracking(True)
self._ui.web_view.page().setNetworkAccessManager(self._warc_nan)
self.resize(800, 600)
self._highlighter.resize(self.size())
self.connect(self._ui.url_location, QtCore.SIGNAL("returnPressed()"), self.browse)
self.connect(self._ui.go_back, QtCore.SIGNAL("clicked()"), self._ui.web_view.back)
self.connect(self._ui.go_forward, QtCore.SIGNAL("clicked()"), self._ui.web_view.forward)
self.connect(self._ui.web_view, QtCore.SIGNAL("urlChanged(const QUrl)"), self.url_changed)
self.connect(self._ui.select_button, QtCore.SIGNAL("clicked()"), self.select)
self.connect(self._ui.save_button, QtCore.SIGNAL("clicked()"), self.save)
self.default_url = "http://g1.globo.com/economia/mercados/noticia/2015/02/dolar-fecha-em-forte-alta-e-passa-de-r-283-nesta-terca.html"
self._ui.url_location.setText(self.default_url)
self.browse()
def resizeEvent(self, event):
self._highlighter.resize(event.size())
def eventFilter(self, obj, event):
try:
if (event.type() == QEvent.MouseMove) and self._selecting:
self._handle_mouse_move(event.pos())
finally:
return QtGui.QMainWindow.eventFilter(self, obj, event)
def browse(self):
url = self._ui.url_location.text() \
if self._ui.url_location.text() \
else self.default_url
self._highlighter.clear_elements()
self._ui.web_view.load(QtCore.QUrl(url))
self._ui.web_view.show()
def url_changed(self, url):
try:
self.switch_mode(self.BROWSER_MODE_NORMAL)
url_s = qstring_to_str(self._ui.web_view.url().toString())
self._warc_nan.current_warc = self._get_warc_for_url(url_s)
finally:
self._ui.url_location.setText(url.toString())
def switch_mode(self, new_mode):
if (new_mode != self.BROWSER_MODE_NORMAL) \
and (new_mode != self.BROWSER_MODE_SELECTION):
raise ValueError("Invalid browser mode")
if new_mode == self._browser_mode:
return
if new_mode == self.BROWSER_MODE_NORMAL:
self._ui.select_button.setText("Selecionar")
self._ui.save_button.setEnabled(False)
else: # new_mode == self.BROWSER_MODE_SELECTION:
self._ui.select_button.setText("Cancelar")
self._ui.save_button.setEnabled(True)
self.cancel_selection()
self._browser_mode = new_mode
def select_element(self):
self._selecting = True
def cancel_selection(self):
self._selecting = False
self.highlight_element(None)
def highlight_element(self, element):
self._highlighter.highlight_element(element)
def select(self):
if self._browser_mode != self.BROWSER_MODE_SELECTION:
self.switch_mode(self.BROWSER_MODE_SELECTION)
else:
self.switch_mode(self.BROWSER_MODE_NORMAL)
def save(self):
if self._browser_mode != self.BROWSER_MODE_SELECTION:
return
self._warc_nan.current_warc.make_permanent()
self.switch_mode(self.BROWSER_MODE_NORMAL)
def _get_warc_for_url(self, url):
warc = self._find_warc(url)
if not warc:
warc_file = os.path.join(WARC_DIR, "bardo-browser.warc.gz")
warc = Warc(warc_file, temporary=True, main_url=url)
return warc
def _find_warc(self, url):
return None
def _compare_urls(self, url1, url2):
return (self._normalize_url(url1) == self._normalize_url(url2))
def _normalize_url(self, url):
return urltools.normalize(url)
def _handle_mouse_move(self, pos):
hit_result = self._ui.web_view.page().mainFrame().hitTestContent(pos)
if not hit_result.isNull():
element = hit_result.enclosingBlockElement()
if not element.isNull():
self.highlight_element(element)
else:
self.highlight_element(None)
else:
self.highlight_element(None)
if __name__ == "__main__":
app = QtGui.QApplication(sys.argv)
QWebSettings.globalSettings() \
.setAttribute(QWebSettings.DeveloperExtrasEnabled, True)
main = Browser()
main.show()
sys.exit(app.exec_())