Esempio n. 1
0
class LSPServerEditor(QDialog):
    DEFAULT_HOST = '127.0.0.1'
    DEFAULT_PORT = 2084
    DEFAULT_CMD = ''
    DEFAULT_ARGS = ''
    DEFAULT_CONFIGURATION = '{}'
    DEFAULT_EXTERNAL = False
    DEFAULT_STDIO = False
    HOST_REGEX = re.compile(r'^\w+([.]\w+)*$')
    NON_EMPTY_REGEX = re.compile(r'^\S+$')
    JSON_VALID = _('Valid JSON')
    JSON_INVALID = _('Invalid JSON')
    MIN_SIZE = QSize(850, 600)
    INVALID_CSS = "QLineEdit {border: 1px solid red;}"
    VALID_CSS = "QLineEdit {border: 1px solid green;}"

    def __init__(self, parent, language=None, cmd='', host='127.0.0.1',
                 port=2084, args='', external=False, stdio=False,
                 configurations={}, **kwargs):
        super(LSPServerEditor, self).__init__(parent)

        description = _(
            "To create a new server configuration, you need to select a "
            "programming language, set the command to start its associated "
            "server and enter any arguments that should be passed to it on "
            "startup. Additionally, you can set the server's hostname and "
            "port if connecting to an external server, "
            "or to a local one using TCP instead of stdio pipes."
            "<br><br>"
            "<i>Note</i>: You can use the placeholders <tt>{host}</tt> and "
            "<tt>{port}</tt> in the server arguments field to automatically "
            "fill in the respective values.<br>"
        )
        self.parent = parent
        self.external = external

        # Widgets
        self.server_settings_description = QLabel(description)
        self.lang_cb = QComboBox(self)
        self.external_cb = QCheckBox(_('External server'), self)
        self.host_label = QLabel(_('Host:'))
        self.host_input = QLineEdit(self)
        self.port_label = QLabel(_('Port:'))
        self.port_spinner = QSpinBox(self)
        self.cmd_label = QLabel(_('Command:'))
        self.cmd_input = QLineEdit(self)
        self.args_label = QLabel(_('Arguments:'))
        self.args_input = QLineEdit(self)
        self.json_label = QLabel(self.JSON_VALID, self)
        self.conf_label = QLabel(_('<b>Server Configuration:</b>'))
        self.conf_input = CodeEditor(None)

        self.bbox = QDialogButtonBox(QDialogButtonBox.Ok |
                                     QDialogButtonBox.Cancel)
        self.button_ok = self.bbox.button(QDialogButtonBox.Ok)
        self.button_cancel = self.bbox.button(QDialogButtonBox.Cancel)

        # Widget setup
        self.setMinimumSize(self.MIN_SIZE)
        self.setWindowTitle(_('LSP server editor'))

        self.server_settings_description.setWordWrap(True)

        self.lang_cb.setToolTip(
            _('Programming language provided by the LSP server'))
        self.lang_cb.addItem(_('Select a language'))
        self.lang_cb.addItems(LSP_LANGUAGES)

        self.button_ok.setEnabled(False)
        if language is not None:
            idx = LSP_LANGUAGES.index(language)
            self.lang_cb.setCurrentIndex(idx + 1)
            self.button_ok.setEnabled(True)

        self.host_input.setPlaceholderText('127.0.0.1')
        self.host_input.setText(host)
        self.host_input.textChanged.connect(lambda x: self.validate())

        self.port_spinner.setToolTip(_('TCP port number of the server'))
        self.port_spinner.setMinimum(1)
        self.port_spinner.setMaximum(60000)
        self.port_spinner.setValue(port)

        self.cmd_input.setText(cmd)
        self.cmd_input.setPlaceholderText('/absolute/path/to/command')

        self.args_input.setToolTip(
            _('Additional arguments required to start the server'))
        self.args_input.setText(args)
        self.args_input.setPlaceholderText(r'--host {host} --port {port}')

        self.conf_input.setup_editor(
            language='json',
            color_scheme=CONF.get('appearance', 'selected'),
            wrap=False,
            edge_line=True,
            highlight_current_line=True,
            highlight_current_cell=True,
            occurrence_highlighting=True,
            auto_unindent=True,
            font=get_font(),
            filename='config.json',
            folding=False
        )
        self.conf_input.set_language('json', 'config.json')
        self.conf_input.setToolTip(_('Additional LSP server configuration '
                                     'set at runtime. JSON required'))
        try:
            conf_text = json.dumps(configurations, indent=4, sort_keys=True)
        except Exception:
            conf_text = '{}'
        self.conf_input.set_text(conf_text)

        self.external_cb.setToolTip(
            _('Check if the server runs on a remote location'))
        self.external_cb.setChecked(external)

        self.stdio_cb = QCheckBox(_('Use stdio pipes for communication'), self)
        self.stdio_cb.setToolTip(_('Check if the server communicates '
                                   'using stdin/out pipes'))
        self.stdio_cb.setChecked(stdio)

        # Layout setup
        hlayout = QHBoxLayout()
        general_vlayout = QVBoxLayout()
        general_vlayout.addWidget(self.server_settings_description)

        vlayout = QVBoxLayout()

        lang_group = QGroupBox(_('Language'))
        lang_layout = QVBoxLayout()
        lang_layout.addWidget(self.lang_cb)
        lang_group.setLayout(lang_layout)
        vlayout.addWidget(lang_group)

        server_group = QGroupBox(_('Language server'))
        server_layout = QGridLayout()
        server_layout.addWidget(self.cmd_label, 0, 0)
        server_layout.addWidget(self.cmd_input, 0, 1)
        server_layout.addWidget(self.args_label, 1, 0)
        server_layout.addWidget(self.args_input, 1, 1)
        server_group.setLayout(server_layout)
        vlayout.addWidget(server_group)

        address_group = QGroupBox(_('Server address'))
        host_layout = QVBoxLayout()
        host_layout.addWidget(self.host_label)
        host_layout.addWidget(self.host_input)

        port_layout = QVBoxLayout()
        port_layout.addWidget(self.port_label)
        port_layout.addWidget(self.port_spinner)

        conn_info_layout = QHBoxLayout()
        conn_info_layout.addLayout(host_layout)
        conn_info_layout.addLayout(port_layout)
        address_group.setLayout(conn_info_layout)
        vlayout.addWidget(address_group)

        advanced_group = QGroupBox(_('Advanced'))
        advanced_layout = QVBoxLayout()
        advanced_layout.addWidget(self.external_cb)
        advanced_layout.addWidget(self.stdio_cb)
        advanced_group.setLayout(advanced_layout)
        vlayout.addWidget(advanced_group)

        conf_layout = QVBoxLayout()
        conf_layout.addWidget(self.conf_label)
        conf_layout.addWidget(self.conf_input)
        conf_layout.addWidget(self.json_label)

        vlayout.addStretch()
        hlayout.addLayout(vlayout, 2)
        hlayout.addLayout(conf_layout, 3)
        general_vlayout.addLayout(hlayout)

        general_vlayout.addWidget(self.bbox)
        self.setLayout(general_vlayout)
        self.form_status(False)

        # Signals
        if not external:
            self.cmd_input.textChanged.connect(lambda x: self.validate())
        self.external_cb.stateChanged.connect(self.set_local_options)
        self.stdio_cb.stateChanged.connect(self.set_stdio_options)
        self.lang_cb.currentIndexChanged.connect(self.lang_selection_changed)
        self.conf_input.textChanged.connect(self.validate)
        self.bbox.accepted.connect(self.accept)
        self.bbox.rejected.connect(self.reject)

        # Final setup
        if language is not None:
            self.form_status(True)
            self.validate()
            if stdio:
                self.set_stdio_options(True)
            if external:
                self.set_local_options(True)

    @Slot()
    def validate(self):
        host_text = self.host_input.text()
        cmd_text = self.cmd_input.text()

        if not self.HOST_REGEX.match(host_text):
            self.button_ok.setEnabled(False)
            self.host_input.setStyleSheet(self.INVALID_CSS)
            if bool(host_text):
                self.host_input.setToolTip(_('Hostname must be valid'))
            else:
                self.host_input.setToolTip(
                    _('Hostname or IP address of the host on which the server '
                      'is running. Must be non empty.'))
        else:
            self.host_input.setStyleSheet(self.VALID_CSS)
            self.host_input.setToolTip(_('Hostname is valid'))
            self.button_ok.setEnabled(True)

        if not self.external:
            if not self.NON_EMPTY_REGEX.match(cmd_text):
                self.button_ok.setEnabled(False)
                self.cmd_input.setStyleSheet(self.INVALID_CSS)
                self.cmd_input.setToolTip(
                    _('Command used to start the LSP server locally. Must be '
                      'non empty'))
                return

            if find_program(cmd_text) is None:
                self.button_ok.setEnabled(False)
                self.cmd_input.setStyleSheet(self.INVALID_CSS)
                self.cmd_input.setToolTip(_('Program was not found '
                                            'on your system'))
            else:
                self.cmd_input.setStyleSheet(self.VALID_CSS)
                self.cmd_input.setToolTip(_('Program was found on your '
                                            'system'))
                self.button_ok.setEnabled(True)

        try:
            json.loads(self.conf_input.toPlainText())
            try:
                self.json_label.setText(self.JSON_VALID)
            except Exception:
                pass
        except ValueError:
            try:
                self.json_label.setText(self.JSON_INVALID)
                self.button_ok.setEnabled(False)
            except Exception:
                pass

    def form_status(self, status):
        self.host_input.setEnabled(status)
        self.port_spinner.setEnabled(status)
        self.external_cb.setEnabled(status)
        self.stdio_cb.setEnabled(status)
        self.cmd_input.setEnabled(status)
        self.args_input.setEnabled(status)
        self.conf_input.setEnabled(status)
        self.json_label.setVisible(status)

    @Slot()
    def lang_selection_changed(self):
        idx = self.lang_cb.currentIndex()
        if idx == 0:
            self.set_defaults()
            self.form_status(False)
            self.button_ok.setEnabled(False)
        else:
            server = self.parent.get_server_by_lang(LSP_LANGUAGES[idx - 1])
            self.form_status(True)
            if server is not None:
                self.host_input.setText(server.host)
                self.port_spinner.setValue(server.port)
                self.external_cb.setChecked(server.external)
                self.stdio_cb.setChecked(server.stdio)
                self.cmd_input.setText(server.cmd)
                self.args_input.setText(server.args)
                self.conf_input.set_text(json.dumps(server.configurations))
                self.json_label.setText(self.JSON_VALID)
                self.button_ok.setEnabled(True)
            else:
                self.set_defaults()

    def set_defaults(self):
        self.cmd_input.setStyleSheet('')
        self.host_input.setStyleSheet('')
        self.host_input.setText(self.DEFAULT_HOST)
        self.port_spinner.setValue(self.DEFAULT_PORT)
        self.external_cb.setChecked(self.DEFAULT_EXTERNAL)
        self.stdio_cb.setChecked(self.DEFAULT_STDIO)
        self.cmd_input.setText(self.DEFAULT_CMD)
        self.args_input.setText(self.DEFAULT_ARGS)
        self.conf_input.set_text(self.DEFAULT_CONFIGURATION)
        self.json_label.setText(self.JSON_VALID)

    @Slot(bool)
    @Slot(int)
    def set_local_options(self, enabled):
        self.external = enabled
        self.cmd_input.setEnabled(True)
        self.args_input.setEnabled(True)
        if enabled:
            self.cmd_input.setEnabled(False)
            self.cmd_input.setStyleSheet('')
            self.args_input.setEnabled(False)
            self.stdio_cb.stateChanged.disconnect()
            self.stdio_cb.setChecked(False)
            self.stdio_cb.setEnabled(False)
        else:
            self.cmd_input.setEnabled(True)
            self.args_input.setEnabled(True)
            self.stdio_cb.setEnabled(True)
            self.stdio_cb.setChecked(False)
            self.stdio_cb.stateChanged.connect(self.set_stdio_options)
        try:
            self.validate()
        except Exception:
            pass

    @Slot(bool)
    @Slot(int)
    def set_stdio_options(self, enabled):
        self.stdio = enabled
        if enabled:
            self.cmd_input.setEnabled(True)
            self.args_input.setEnabled(True)
            self.external_cb.stateChanged.disconnect()
            self.external_cb.setChecked(False)
            self.external_cb.setEnabled(False)
            self.host_input.setStyleSheet('')
            self.host_input.setEnabled(False)
            self.port_spinner.setEnabled(False)
        else:
            self.cmd_input.setEnabled(True)
            self.args_input.setEnabled(True)
            self.external_cb.setChecked(False)
            self.external_cb.setEnabled(True)
            self.external_cb.stateChanged.connect(self.set_local_options)
            self.host_input.setEnabled(True)
            self.port_spinner.setEnabled(True)
        try:
            self.validate()
        except Exception:
            pass

    def get_options(self):
        language_idx = self.lang_cb.currentIndex()
        language = LSP_LANGUAGES[language_idx - 1]
        host = self.host_input.text()
        port = int(self.port_spinner.value())
        external = self.external_cb.isChecked()
        stdio = self.stdio_cb.isChecked()
        args = self.args_input.text()
        cmd = self.cmd_input.text()
        configurations = json.loads(self.conf_input.toPlainText())
        server = LSPServer(language=language.lower(), cmd=cmd, args=args,
                           host=host, port=port, external=external,
                           stdio=stdio, configurations=configurations)
        return server
Esempio n. 2
0
class LSPServerEditor(QDialog):
    DEFAULT_HOST = '127.0.0.1'
    DEFAULT_PORT = 2084
    DEFAULT_CMD = ''
    DEFAULT_ARGS = ''
    DEFAULT_CONFIGURATION = '{}'
    DEFAULT_EXTERNAL = False
    HOST_REGEX = re.compile(r'^\w+([.]\w+)*$')
    NON_EMPTY_REGEX = re.compile(r'^\S+$')
    JSON_VALID = _('JSON valid')
    JSON_INVALID = _('JSON invalid')

    def __init__(self, parent, language=None, cmd='', host='127.0.0.1',
                 port=2084, args='', external=False, configurations={},
                 **kwargs):
        super(LSPServerEditor, self).__init__(parent)
        self.parent = parent
        self.external = external
        bbox = QDialogButtonBox(QDialogButtonBox.Ok | QDialogButtonBox.Cancel)
        self.button_ok = bbox.button(QDialogButtonBox.Ok)
        self.button_cancel = bbox.button(QDialogButtonBox.Cancel)
        self.button_ok.setEnabled(False)

        description = _('To create a new configuration, '
                        'you need to select a programming '
                        'language, along with a executable '
                        'name for the server to execute '
                        '(If the instance is local), '
                        'and the host and port. Finally, '
                        'you need to provide the '
                        'arguments that the server accepts. '
                        'The placeholders <tt>%(host)s</tt> and '
                        '<tt>%(port)s</tt> refer to the host '
                        'and the port, respectively.')
        server_settings_description = QLabel(description)
        server_settings_description.setWordWrap(True)

        lang_label = QLabel(_('Language:'))
        self.lang_cb = QComboBox(self)
        self.lang_cb.setToolTip(_('Programming language provided '
                                  'by the LSP server'))
        self.lang_cb.addItem(_('Select a language'))
        self.lang_cb.addItems(LSP_LANGUAGES)

        if language is not None:
            idx = LSP_LANGUAGES.index(language)
            self.lang_cb.setCurrentIndex(idx + 1)
            self.button_ok.setEnabled(True)

        host_label = QLabel(_('Host:'))
        self.host_input = QLineEdit(self)
        self.host_input.setToolTip(_('Name of the host that will provide '
                                     'access to the server'))
        self.host_input.setText(host)
        self.host_input.textChanged.connect(lambda x: self.validate())

        port_label = QLabel(_('Port:'))
        self.port_spinner = QSpinBox(self)
        self.port_spinner.setToolTip(_('TCP port number of the server'))
        self.port_spinner.setMinimum(1)
        self.port_spinner.setMaximum(60000)
        self.port_spinner.setValue(port)

        cmd_label = QLabel(_('Command to execute:'))
        self.cmd_input = QLineEdit(self)
        self.cmd_input.setToolTip(_('Command used to start the '
                                    'LSP server locally'))
        self.cmd_input.setText(cmd)

        if not external:
            self.cmd_input.textChanged.connect(lambda x: self.validate())

        args_label = QLabel(_('Server arguments:'))
        self.args_input = QLineEdit(self)
        self.args_input.setToolTip(_('Additional arguments required to '
                                     'start the server'))
        self.args_input.setText(args)

        conf_label = QLabel(_('LSP Server Configurations:'))
        self.conf_input = CodeEditor(None)
        self.conf_input.textChanged.connect(self.validate)
        color_scheme = CONF.get('color_schemes', 'selected')
        self.conf_input.setup_editor(
            language='JSON',
            color_scheme=color_scheme,
            wrap=False,
            edge_line=True,
            highlight_current_line=True,
            highlight_current_cell=True,
            occurrence_highlighting=True,
            auto_unindent=True,
            font=get_font(),
            filename='config.json')
        self.conf_input.setToolTip(_('Additional LSP server configurations '
                                     'set at runtime. JSON required'))
        conf_text = '{}'
        try:
            conf_text = json.dumps(configurations, indent=4, sort_keys=True)
        except Exception:
            pass
        self.conf_input.set_text(conf_text)
        self.json_label = QLabel(self.JSON_VALID, self)

        self.external_cb = QCheckBox(_('External server'), self)
        self.external_cb.setToolTip(_('Check if the server runs '
                                      'on a remote location'))
        self.external_cb.setChecked(external)
        self.external_cb.stateChanged.connect(self.set_local_options)

        hlayout = QHBoxLayout()
        general_vlayout = QVBoxLayout()
        general_vlayout.addWidget(server_settings_description)

        vlayout = QVBoxLayout()
        lang_layout = QVBoxLayout()
        lang_layout.addWidget(lang_label)
        lang_layout.addWidget(self.lang_cb)

        # layout2 = QHBoxLayout()
        # layout2.addLayout(lang_layout)
        lang_layout.addWidget(self.external_cb)
        vlayout.addLayout(lang_layout)

        host_layout = QVBoxLayout()
        host_layout.addWidget(host_label)
        host_layout.addWidget(self.host_input)

        port_layout = QVBoxLayout()
        port_layout.addWidget(port_label)
        port_layout.addWidget(self.port_spinner)

        conn_info_layout = QHBoxLayout()
        conn_info_layout.addLayout(host_layout)
        conn_info_layout.addLayout(port_layout)
        vlayout.addLayout(conn_info_layout)

        cmd_layout = QVBoxLayout()
        cmd_layout.addWidget(cmd_label)
        cmd_layout.addWidget(self.cmd_input)
        vlayout.addLayout(cmd_layout)

        args_layout = QVBoxLayout()
        args_layout.addWidget(args_label)
        args_layout.addWidget(self.args_input)
        vlayout.addLayout(args_layout)

        conf_layout = QVBoxLayout()
        conf_layout.addWidget(conf_label)
        conf_layout.addWidget(self.conf_input)
        conf_layout.addWidget(self.json_label)

        hlayout.addLayout(vlayout)
        hlayout.addLayout(conf_layout)
        general_vlayout.addLayout(hlayout)

        general_vlayout.addWidget(bbox)
        self.setLayout(general_vlayout)
        bbox.accepted.connect(self.accept)
        bbox.rejected.connect(self.reject)
        self.lang_cb.currentIndexChanged.connect(
            self.lang_selection_changed)
        self.form_status(False)
        if language is not None:
            self.form_status(True)
            self.validate()

    @Slot()
    def validate(self):
        host_text = self.host_input.text()
        cmd_text = self.cmd_input.text()
        if not self.HOST_REGEX.match(host_text):
            self.button_ok.setEnabled(False)
            self.host_input.setStyleSheet("QLineEdit{border: 1px solid red;}")
            self.host_input.setToolTip('Hostname must be valid')
            return
        else:
            self.host_input.setStyleSheet(
                "QLineEdit{border: 1px solid green;}")
            self.host_input.setToolTip('Hostname is valid')
            self.button_ok.setEnabled(True)

        if not self.external:
            if not self.NON_EMPTY_REGEX.match(cmd_text):
                self.button_ok.setEnabled(False)
                self.cmd_input.setStyleSheet(
                    "QLineEdit{border: 1px solid red;}")
                self.cmd_input.setToolTip('Command must be non empty')
                return

            if find_program(cmd_text) is None:
                self.button_ok.setEnabled(False)
                self.cmd_input.setStyleSheet(
                    "QLineEdit{border: 1px solid red;}")
                self.cmd_input.setToolTip('Program was not found '
                                          'on your system')
                return
            else:
                self.cmd_input.setStyleSheet(
                    "QLineEdit{border: 1px solid green;}")
                self.cmd_input.setToolTip('Program was found on your system')
                self.button_ok.setEnabled(True)
        try:
            json.loads(self.conf_input.toPlainText())
            try:
                self.json_label.setText(self.JSON_VALID)
            except:
                pass
        except (ValueError, json.decoder.JSONDecodeError):
            try:
                self.json_label.setText(self.JSON_INVALID)
                self.button_ok.setEnabled(False)
            except:
                pass

    def form_status(self, status):
        self.host_input.setEnabled(status)
        self.port_spinner.setEnabled(status)
        self.external_cb.setEnabled(status)
        self.cmd_input.setEnabled(status)
        self.args_input.setEnabled(status)
        self.conf_input.setEnabled(status)
        self.json_label.setVisible(status)

    @Slot()
    def lang_selection_changed(self):
        idx = self.lang_cb.currentIndex()
        if idx == 0:
            self.set_defaults()
            self.form_status(False)
            self.button_ok.setEnabled(False)
        else:
            server = self.parent.get_server_by_lang(LSP_LANGUAGES[idx - 1])
            self.form_status(True)
            if server is not None:
                self.host_input.setText(server.host)
                self.port_spinner.setValue(server.port)
                self.external_cb.setChecked(server.external)
                self.cmd_input.setText(server.cmd)
                self.args_input.setText(server.args)
                self.conf_input.set_text(json.dumps(server.configurations))
                self.json_label.setText(self.JSON_VALID)
                self.button_ok.setEnabled(True)
            else:
                self.set_defaults()

    def set_defaults(self):
        self.cmd_input.setStyleSheet('')
        self.host_input.setStyleSheet('')
        self.host_input.setText(self.DEFAULT_HOST)
        self.port_spinner.setValue(self.DEFAULT_PORT)
        self.external_cb.setChecked(self.DEFAULT_EXTERNAL)
        self.cmd_input.setText(self.DEFAULT_CMD)
        self.args_input.setText(self.DEFAULT_ARGS)
        self.conf_input.set_text(self.DEFAULT_CONFIGURATION)
        self.json_label.setText(self.JSON_VALID)

    @Slot(bool)
    @Slot(int)
    def set_local_options(self, enabled):
        self.external = enabled
        self.cmd_input.setEnabled(True)
        self.args_input.setEnabled(True)
        if enabled:
            self.cmd_input.setEnabled(False)
            self.cmd_input.setStyleSheet('')
            self.args_input.setEnabled(False)
        try:
            self.validate()
        except:
            pass

    def get_options(self):
        language_idx = self.lang_cb.currentIndex()
        language = LSP_LANGUAGES[language_idx - 1]
        host = self.host_input.text()
        port = int(self.port_spinner.value())
        external = self.external_cb.isChecked()
        args = self.args_input.text()
        cmd = self.cmd_input.text()
        configurations = json.loads(self.conf_input.toPlainText())
        server = LSPServer(language=language.lower(), cmd=cmd, args=args,
                           host=host, port=port, external=external,
                           configurations=configurations)
        return server
Esempio n. 3
0
class LSPServerEditor(QDialog):
    DEFAULT_HOST = '127.0.0.1'
    DEFAULT_PORT = 2084
    DEFAULT_CMD = ''
    DEFAULT_ARGS = ''
    DEFAULT_CONFIGURATION = '{}'
    DEFAULT_EXTERNAL = False
    HOST_REGEX = re.compile(r'^\w+([.]\w+)*$')
    NON_EMPTY_REGEX = re.compile(r'^\S+$')
    JSON_VALID = _('JSON valid')
    JSON_INVALID = _('JSON invalid')

    def __init__(self, parent, language=None, cmd='', host='127.0.0.1',
                 port=2084, args='', external=False, configurations={},
                 **kwargs):
        super(LSPServerEditor, self).__init__(parent)
        self.parent = parent
        self.external = external
        bbox = QDialogButtonBox(QDialogButtonBox.Ok | QDialogButtonBox.Cancel)
        self.button_ok = bbox.button(QDialogButtonBox.Ok)
        self.button_cancel = bbox.button(QDialogButtonBox.Cancel)
        self.button_ok.setEnabled(False)

        description = _('To create a new configuration, '
                        'you need to select a programming '
                        'language, along with a executable '
                        'name for the server to execute '
                        '(If the instance is local), '
                        'and the host and port. Finally, '
                        'you need to provide the '
                        'arguments that the server accepts. '
                        'The placeholders <tt>%(host)s</tt> and '
                        '<tt>%(port)s</tt> refer to the host '
                        'and the port, respectively.')
        server_settings_description = QLabel(description)
        server_settings_description.setWordWrap(True)

        lang_label = QLabel(_('Language:'))
        self.lang_cb = QComboBox(self)
        self.lang_cb.setToolTip(_('Programming language provided '
                                  'by the LSP server'))
        self.lang_cb.addItem(_('Select a language'))
        self.lang_cb.addItems(LSP_LANGUAGES)

        if language is not None:
            idx = LSP_LANGUAGES.index(language)
            self.lang_cb.setCurrentIndex(idx + 1)
            self.button_ok.setEnabled(True)

        host_label = QLabel(_('Host:'))
        self.host_input = QLineEdit(self)
        self.host_input.setToolTip(_('Name of the host that will provide '
                                     'access to the server'))
        self.host_input.setText(host)
        self.host_input.textChanged.connect(lambda x: self.validate())

        port_label = QLabel(_('Port:'))
        self.port_spinner = QSpinBox(self)
        self.port_spinner.setToolTip(_('TCP port number of the server'))
        self.port_spinner.setMinimum(1)
        self.port_spinner.setMaximum(60000)
        self.port_spinner.setValue(port)

        cmd_label = QLabel(_('Command to execute:'))
        self.cmd_input = QLineEdit(self)
        self.cmd_input.setToolTip(_('Command used to start the '
                                    'LSP server locally'))
        self.cmd_input.setText(cmd)

        if not external:
            self.cmd_input.textChanged.connect(lambda x: self.validate())

        args_label = QLabel(_('Server arguments:'))
        self.args_input = QLineEdit(self)
        self.args_input.setToolTip(_('Additional arguments required to '
                                     'start the server'))
        self.args_input.setText(args)

        conf_label = QLabel(_('LSP Server Configurations:'))
        self.conf_input = CodeEditor(None)
        self.conf_input.textChanged.connect(self.validate)
        color_scheme = CONF.get('appearance', 'selected')
        self.conf_input.setup_editor(
            language='JSON',
            color_scheme=color_scheme,
            wrap=False,
            edge_line=True,
            highlight_current_line=True,
            highlight_current_cell=True,
            occurrence_highlighting=True,
            auto_unindent=True,
            font=get_font(),
            filename='config.json')
        self.conf_input.setToolTip(_('Additional LSP server configurations '
                                     'set at runtime. JSON required'))
        conf_text = '{}'
        try:
            conf_text = json.dumps(configurations, indent=4, sort_keys=True)
        except Exception:
            pass
        self.conf_input.set_text(conf_text)
        self.json_label = QLabel(self.JSON_VALID, self)

        self.external_cb = QCheckBox(_('External server'), self)
        self.external_cb.setToolTip(_('Check if the server runs '
                                      'on a remote location'))
        self.external_cb.setChecked(external)
        self.external_cb.stateChanged.connect(self.set_local_options)

        hlayout = QHBoxLayout()
        general_vlayout = QVBoxLayout()
        general_vlayout.addWidget(server_settings_description)

        vlayout = QVBoxLayout()
        lang_layout = QVBoxLayout()
        lang_layout.addWidget(lang_label)
        lang_layout.addWidget(self.lang_cb)

        # layout2 = QHBoxLayout()
        # layout2.addLayout(lang_layout)
        lang_layout.addWidget(self.external_cb)
        vlayout.addLayout(lang_layout)

        host_layout = QVBoxLayout()
        host_layout.addWidget(host_label)
        host_layout.addWidget(self.host_input)

        port_layout = QVBoxLayout()
        port_layout.addWidget(port_label)
        port_layout.addWidget(self.port_spinner)

        conn_info_layout = QHBoxLayout()
        conn_info_layout.addLayout(host_layout)
        conn_info_layout.addLayout(port_layout)
        vlayout.addLayout(conn_info_layout)

        cmd_layout = QVBoxLayout()
        cmd_layout.addWidget(cmd_label)
        cmd_layout.addWidget(self.cmd_input)
        vlayout.addLayout(cmd_layout)

        args_layout = QVBoxLayout()
        args_layout.addWidget(args_label)
        args_layout.addWidget(self.args_input)
        vlayout.addLayout(args_layout)

        conf_layout = QVBoxLayout()
        conf_layout.addWidget(conf_label)
        conf_layout.addWidget(self.conf_input)
        conf_layout.addWidget(self.json_label)

        hlayout.addLayout(vlayout)
        hlayout.addLayout(conf_layout)
        general_vlayout.addLayout(hlayout)

        general_vlayout.addWidget(bbox)
        self.setLayout(general_vlayout)
        bbox.accepted.connect(self.accept)
        bbox.rejected.connect(self.reject)
        self.lang_cb.currentIndexChanged.connect(
            self.lang_selection_changed)
        self.form_status(False)
        if language is not None:
            self.form_status(True)
            self.validate()

    @Slot()
    def validate(self):
        host_text = self.host_input.text()
        cmd_text = self.cmd_input.text()
        if not self.HOST_REGEX.match(host_text):
            self.button_ok.setEnabled(False)
            self.host_input.setStyleSheet("QLineEdit{border: 1px solid red;}")
            self.host_input.setToolTip('Hostname must be valid')
            return
        else:
            self.host_input.setStyleSheet(
                "QLineEdit{border: 1px solid green;}")
            self.host_input.setToolTip('Hostname is valid')
            self.button_ok.setEnabled(True)

        if not self.external:
            if not self.NON_EMPTY_REGEX.match(cmd_text):
                self.button_ok.setEnabled(False)
                self.cmd_input.setStyleSheet(
                    "QLineEdit{border: 1px solid red;}")
                self.cmd_input.setToolTip('Command must be non empty')
                return

            if find_program(cmd_text) is None:
                self.button_ok.setEnabled(False)
                self.cmd_input.setStyleSheet(
                    "QLineEdit{border: 1px solid red;}")
                self.cmd_input.setToolTip('Program was not found '
                                          'on your system')
                return
            else:
                self.cmd_input.setStyleSheet(
                    "QLineEdit{border: 1px solid green;}")
                self.cmd_input.setToolTip('Program was found on your system')
                self.button_ok.setEnabled(True)
        try:
            json.loads(self.conf_input.toPlainText())
            try:
                self.json_label.setText(self.JSON_VALID)
            except:
                pass
        except (ValueError, json.decoder.JSONDecodeError):
            try:
                self.json_label.setText(self.JSON_INVALID)
                self.button_ok.setEnabled(False)
            except:
                pass

    def form_status(self, status):
        self.host_input.setEnabled(status)
        self.port_spinner.setEnabled(status)
        self.external_cb.setEnabled(status)
        self.cmd_input.setEnabled(status)
        self.args_input.setEnabled(status)
        self.conf_input.setEnabled(status)
        self.json_label.setVisible(status)

    @Slot()
    def lang_selection_changed(self):
        idx = self.lang_cb.currentIndex()
        if idx == 0:
            self.set_defaults()
            self.form_status(False)
            self.button_ok.setEnabled(False)
        else:
            server = self.parent.get_server_by_lang(LSP_LANGUAGES[idx - 1])
            self.form_status(True)
            if server is not None:
                self.host_input.setText(server.host)
                self.port_spinner.setValue(server.port)
                self.external_cb.setChecked(server.external)
                self.cmd_input.setText(server.cmd)
                self.args_input.setText(server.args)
                self.conf_input.set_text(json.dumps(server.configurations))
                self.json_label.setText(self.JSON_VALID)
                self.button_ok.setEnabled(True)
            else:
                self.set_defaults()

    def set_defaults(self):
        self.cmd_input.setStyleSheet('')
        self.host_input.setStyleSheet('')
        self.host_input.setText(self.DEFAULT_HOST)
        self.port_spinner.setValue(self.DEFAULT_PORT)
        self.external_cb.setChecked(self.DEFAULT_EXTERNAL)
        self.cmd_input.setText(self.DEFAULT_CMD)
        self.args_input.setText(self.DEFAULT_ARGS)
        self.conf_input.set_text(self.DEFAULT_CONFIGURATION)
        self.json_label.setText(self.JSON_VALID)

    @Slot(bool)
    @Slot(int)
    def set_local_options(self, enabled):
        self.external = enabled
        self.cmd_input.setEnabled(True)
        self.args_input.setEnabled(True)
        if enabled:
            self.cmd_input.setEnabled(False)
            self.cmd_input.setStyleSheet('')
            self.args_input.setEnabled(False)
        try:
            self.validate()
        except:
            pass

    def get_options(self):
        language_idx = self.lang_cb.currentIndex()
        language = LSP_LANGUAGES[language_idx - 1]
        host = self.host_input.text()
        port = int(self.port_spinner.value())
        external = self.external_cb.isChecked()
        args = self.args_input.text()
        cmd = self.cmd_input.text()
        configurations = json.loads(self.conf_input.toPlainText())
        server = LSPServer(language=language.lower(), cmd=cmd, args=args,
                           host=host, port=port, external=external,
                           configurations=configurations)
        return server