PluginProjectWeb.py

# -*- coding: utf-8 -*-

# Copyright (c) 2014 - 2016 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
Module implementing the Web project plugin.
"""

from __future__ import unicode_literals

import os

from PyQt5.QtCore import QObject, QTranslator
from PyQt5.QtWidgets import QMenu

from E5Gui.E5Application import e5App

import Preferences

try:
    from bs4 import BeautifulSoup   # __IGNORE_EXCEPTION__
    BeautifulSoupAvailable = True
except ImportError:
    BeautifulSoup = None
    BeautifulSoupAvailable = False

# Start-Of-Header
name = "Generic Web Project Plug-in"
author = "Detlev Offenbach <detlev@die-offenbachs.de>"
autoactivate = True
deactivateable = True
version = "1.1.2"
className = "ProjectWebPlugin"
packageName = "ProjectWeb"
shortDescription = "Support for Web projects and web related tools."
longDescription = (
    """This plug-in provides support for ordinary web projects and some web"""
    """ related tools.\n\nIt requires BeautifulSoup4 for some of its"""
    """ functionality."""
)
needsRestart = False
pyqtApi = 2
python2Compatible = True
# End-Of-Header

error = ""
    

class ProjectWebPlugin(QObject):
    """
    Class implementing the Web project plugin.
    """
    def __init__(self, ui):
        """
        Constructor
        
        @param ui reference to the user interface object (UI.UserInterface)
        """
        super(ProjectWebPlugin, self).__init__(ui)
        self.__ui = ui
        self.__initialize()
        
        self.__translator = None
        self.__loadTranslator()
        
        self.__initMenu()
    
    def __initialize(self):
        """
        Private slot to (re)initialize the plugin.
        """
        self.__e5project = e5App().getObject("Project")
        
        self.__editors = {}
        self.__mainActions = []
    
    def activate(self):
        """
        Public method to activate this plugin.
        
        @return tuple of None and activation status (boolean)
        """
        global error
        error = ""     # clear previous error
        
        # it is not registered for a specific programming language
        self.__e5project.registerProjectType(
            "Web", self.tr("Web"),
            self.fileTypesCallback)
        
        from Project.ProjectBrowser import SourcesBrowserFlag, \
            FormsBrowserFlag, OthersBrowserFlag
        Preferences.setProjectBrowserFlagsDefault(
            "Web",
            SourcesBrowserFlag | FormsBrowserFlag | OthersBrowserFlag,
        )
        
        self.__ui.showMenu.connect(self.__populateMenu)
        
        menu = self.__ui.getMenu("plugin_tools")
        if menu is not None:
            if not menu.isEmpty():
                act = menu.addSeparator()
                self.__mainActions.append(act)
            act = menu.addMenu(self.__menu)
            self.__mainActions.append(act)
        
        e5App().getObject("ViewManager").editorOpenedEd.connect(
            self.__editorOpened)
        e5App().getObject("ViewManager").editorClosedEd.connect(
            self.__editorClosed)
        
        for editor in e5App().getObject("ViewManager").getOpenEditors():
            self.__editorOpened(editor)
        
        return None, True
    
    def deactivate(self):
        """
        Public method to deactivate this plugin.
        """
        self.__e5project.unregisterProjectType("Web")
        
        self.__ui.showMenu.disconnect(self.__populateMenu)
        
        menu = self.__ui.getMenu("plugin_tools")
        if menu is not None:
            for act in self.__mainActions:
                menu.removeAction(act)
        self.__mainActions = []

        e5App().getObject("ViewManager").editorOpenedEd.disconnect(
            self.__editorOpened)
        e5App().getObject("ViewManager").editorClosedEd.disconnect(
            self.__editorClosed)
        
        for editor, acts in self.__editors.items():
            editor.showMenu.disconnect(self.__editorShowMenu)
            menu = editor.getMenu("Tools")
            if menu is not None:
                for act in acts:
                    menu.removeAction(act)
        
        self.__initialize()
    
    def __loadTranslator(self):
        """
        Private method to load the translation file.
        """
        if self.__ui is not None:
            loc = self.__ui.getLocale()
            if loc and loc != "C":
                locale_dir = os.path.join(
                    os.path.dirname(__file__), "ProjectWeb", "i18n")
                translation = "web_%s" % loc
                translator = QTranslator(None)
                loaded = translator.load(translation, locale_dir)
                if loaded:
                    self.__translator = translator
                    e5App().installTranslator(self.__translator)
                else:
                    print("Warning: translation file '{0}' could not be"
                          " loaded.".format(translation))
                    print("Using default.")
    
    def fileTypesCallback(self):
        """
        Public method to get the filetype associations of the Web project type.
        
        @return dictionary with file type associations
        """
        if self.__e5project.getProjectType() == "Web":
            fileTypes = {
                "*.html": "FORMS",
                "*.htm": "FORMS",
                "*.js": "SOURCES",
            }
        else:
            fileTypes = {}
        return fileTypes
    
    def __initMenu(self):
        """
        Private method to initialize the web tools menu.
        """
        self.__menu = QMenu(self.tr("Web"))
        
        self.__html5ToCss3Act = self.__menu.addAction(self.tr(
            "HTML5 to CSS3"), self.__html5ToCss3)
        self.__html5ToJsAct = self.__menu.addAction(self.tr(
            "HTML5 to JavaScript"), self.__html5ToJs)
        self.__menu.addSeparator()
        self.__html5PrettifyAct = self.__menu.addAction(self.tr(
            "Prettify HTML"), self.__html5Prettify)
        
        self.__menu.aboutToShow.connect(self.__menuAboutToShow)
    
    def __menuAboutToShow(self):
        """
        Private slot to prepare the menu before it is shown.
        """
        editor = e5App().getObject("ViewManager").activeWindow()
        selectionAvailable = bool(editor and editor.selectedText() != "")
        isHtml = bool(editor and
                      editor.getLanguage().lower().startswith("html"))
        
        self.__html5ToCss3Act.setEnabled(
            selectionAvailable and BeautifulSoupAvailable and isHtml)
        self.__html5ToJsAct.setEnabled(
            selectionAvailable and BeautifulSoupAvailable and isHtml)
        self.__html5PrettifyAct.setEnabled(
            BeautifulSoupAvailable and isHtml)
    
    def __populateMenu(self, name, menu):
        """
        Private slot to populate the tools menu with our entries.
        
        @param name name of the menu (string)
        @param menu reference to the menu to be populated (QMenu)
        """
        if name not in ["Tools", "PluginTools"]:
            return
        
        if name == "Tools":
            if not menu.isEmpty():
                menu.addSeparator()
            menu.addMenu(self.__menu)
    
    def __editorOpened(self, editor):
        """
        Private slot called, when a new editor was opened.
        
        @param editor reference to the new editor (QScintilla.Editor)
        """
        menu = editor.getMenu("Tools")
        if menu is not None:
            self.__editors[editor] = []
            if not menu.isEmpty():
                act = menu.addSeparator()
                self.__editors[editor].append(act)
            act = menu.addMenu(self.__menu)
            self.__editors[editor].append(act)
            editor.showMenu.connect(self.__editorShowMenu)
    
    def __editorClosed(self, editor):
        """
        Private slot called, when an editor was closed.
        
        @param editor reference to the editor (QScintilla.Editor)
        """
        try:
            del self.__editors[editor]
        except KeyError:
            pass
    
    def __editorShowMenu(self, menuName, menu, editor):
        """
        Private slot called, when the the editor context menu or a submenu is
        about to be shown.
        
        @param menuName name of the menu to be shown (string)
        @param menu reference to the menu (QMenu)
        @param editor reference to the editor
        """
        if menuName == "Tools":
            if self.__menu.menuAction() not in menu.actions():
                # Re-add our menu
                self.__editors[editor] = []
                if not menu.isEmpty():
                    act = menu.addSeparator()
                    self.__editors[editor].append(act)
                act = menu.addMenu(self.__menu)
                self.__editors[editor].append(act)
    
    def __html5ToCss3(self):
        """
        Private slot handling the HTML5 to CSS3 conversion.
        """
        from ProjectWeb.Html5ToCss3Converter import Html5ToCss3Converter
        vm = e5App().getObject("ViewManager")
        editor = vm.activeWindow()
        html = editor.selectedText()
        
        converter = Html5ToCss3Converter(html)
        css3 = converter.getCss3()
        
        if css3:
            vm.newEditor()
            newEditor = vm.activeWindow()
            newEditor.setText(css3)
            newEditor.setLanguage("dummy.css")
    
    def __html5ToJs(self):
        """
        Private slot handling the HTML5 to JavaScript conversion.
        """
        from ProjectWeb.Html5ToJsConverter import Html5ToJsConverter
        vm = e5App().getObject("ViewManager")
        editor = vm.activeWindow()
        html = editor.selectedText()
        
        converter = Html5ToJsConverter(html)
        js = converter.getJavaScript()
        
        if js:
            vm.newEditor()
            newEditor = vm.activeWindow()
            newEditor.setText(js)
            newEditor.setLanguage("dummy.js")
    
    def __html5Prettify(self):
        """
        Private slot handling the Prettify HTML action.
        """
        from ProjectWeb.Html5Prettifier import Html5Prettifier
        editor = e5App().getObject("ViewManager").activeWindow()
        html = editor.text()
        
        prettifier = Html5Prettifier(html)
        newHtml = prettifier.getPrettifiedHtml()
        
        if newHtml and newHtml != html:
            cursorLine, cursorIndex = editor.getCursorPosition()
            
            editor.beginUndoAction()
            editor.selectAll()
            editor.replaceSelectedText(newHtml)
            editor.endUndoAction()
            
            editor.setCursorPosition(cursorLine, cursorIndex)