Start work on the check book tool

src/calibre/ebooks/oeb/polish/check/__init__.py

@@ -0,0 +1,10 @@
+#!/usr/bin/env python
+# vim:fileencoding=utf-8
+from __future__ import (unicode_literals, division, absolute_import,
+                        print_function)
+
+__license__ = 'GPL v3'
+__copyright__ = '2013, Kovid Goyal <kovid at kovidgoyal.net>'
+
+
+

src/calibre/ebooks/oeb/polish/check/base.py

@@ -0,0 +1,56 @@
+#!/usr/bin/env python
+# vim:fileencoding=utf-8
+from __future__ import (unicode_literals, division, absolute_import,
+                        print_function)
+
+__license__ = 'GPL v3'
+__copyright__ = '2013, Kovid Goyal <kovid at kovidgoyal.net>'
+
+from multiprocessing.pool import ThreadPool
+from functools import partial
+
+from calibre import detect_ncpus as cpu_count
+
+DEBUG, INFO, WARN, ERROR, CRITICAL = xrange(5)
+
+class BaseError(object):
+
+    HELP = ''
+
+    def __init__(self, msg, name, line=None, col=None):
+        self.msg, self.line, self.col = msg, line, col
+        self.name = name
+        self.level = ERROR
+
+    def __str__(self):
+        return '%s:%s (%s, %s):%s' % (self.__class__.__name__, self.name, self.line, self.col, self.msg)
+
+    __repr__ = __str__
+
+class Worker(object):
+
+    def __init__(self, func):
+        self.func = func
+        self.result = None
+        self.tb = None
+
+def worker(func, args):
+    try:
+        result = func(*args)
+        tb = None
+    except:
+        result = None
+        import traceback
+        tb = traceback.format_exc()
+    return result, tb
+
+def run_checkers(func, args_list):
+    num = cpu_count()
+    pool = ThreadPool(num)
+    ans = []
+    for result, tb in pool.map(partial(worker, func), args_list):
+        if tb is not None:
+            raise Exception('Failed to run worker: \n%s' % tb)
+        ans.extend(result)
+    return ans
+

src/calibre/ebooks/oeb/polish/check/main.py

@@ -0,0 +1,35 @@
+#!/usr/bin/env python
+# vim:fileencoding=utf-8
+from __future__ import (unicode_literals, division, absolute_import,
+                        print_function)
+
+__license__ = 'GPL v3'
+__copyright__ = '2013, Kovid Goyal <kovid at kovidgoyal.net>'
+
+from future_builtins import map
+
+from calibre.ebooks.oeb.base import OEB_DOCS
+from calibre.ebooks.oeb.polish.container import guess_type
+from calibre.ebooks.oeb.polish.check.base import run_checkers
+from calibre.ebooks.oeb.polish.check.parsing import check_xml_parsing
+
+def run_checks(container):
+
+    errors = []
+
+    # Check parsing
+    XML_TYPES = frozenset(map(guess_type, ('a.xml', 'a.svg', 'a.opf', 'a.ncx')))
+    xml_items, html_items = [], []
+    for name, mt in container.mime_map.iteritems():
+        items = None
+        if mt in XML_TYPES:
+            items = xml_items
+        elif mt in OEB_DOCS:
+            items = html_items
+        if items is not None:
+            items.append((name, mt, container.open(name, 'rb').read()))
+    errors.extend(run_checkers(check_xml_parsing, xml_items))
+    errors.extend(run_checkers(check_xml_parsing, html_items))
+
+    return errors
+

src/calibre/ebooks/oeb/polish/check/parsing.py

@@ -0,0 +1,46 @@
+#!/usr/bin/env python
+# vim:fileencoding=utf-8
+from __future__ import (unicode_literals, division, absolute_import,
+                        print_function)
+
+__license__ = 'GPL v3'
+__copyright__ = '2013, Kovid Goyal <kovid at kovidgoyal.net>'
+
+from lxml.etree import XMLParser, fromstring, XMLSyntaxError
+
+from calibre.ebooks.oeb.polish.check.base import BaseError
+from calibre.ebooks.oeb.base import OEB_DOCS
+
+class XMLParseError(BaseError):
+
+    HELP = _('A parsing error in an XML file means that the XML syntax in the file is incorrect.'
+             ' Such a file will most probably not open in an ebook reader. These errors can '
+             ' usually be fixed automatically, however, automatic fixing can sometimes '
+             ' "do the wrong thing".')
+
+    def __init__(self, msg, *args, **kwargs):
+        BaseError.__init__(self, 'Parsing failed: ' + msg, *args, **kwargs)
+
+class HTMLParseError(XMLParseError):
+
+    HELP = _('A parsing error in an HTML file means that the HTML syntax is incorrect.'
+             ' Most readers will automatically ignore such errors, but they may result in '
+             ' incorrect display of content. These errors can usually be fixed automatically,'
+             ' however, automatic fixing can sometimes "do the wrong thing".')
+
+def check_xml_parsing(name, mt, raw):
+    parser = XMLParser(recover=False)
+    errcls = HTMLParseError if mt in OEB_DOCS else XMLParseError
+
+    try:
+        fromstring(raw, parser=parser)
+    except XMLSyntaxError as err:
+        try:
+            line, col = err.position
+        except:
+            line = col = None
+        return [errcls(err.message, name, line, col)]
+    except Exception as err:
+        return [errcls(err.message, name)]
+    return []
+

src/calibre/gui2/tweak_book/boss.py

@@ -92,6 +92,8 @@ class Boss(QObject):
         self.gui.preview.split_start_requested.connect(self.split_start_requested)
         self.gui.preview.split_requested.connect(self.split_requested)
         self.gui.preview.link_clicked.connect(self.link_clicked)
+        self.gui.check_book.item_activated.connect(self.check_item_activated)
+        self.gui.check_book.check_requested.connect(self.check_requested)
 
     def preferences(self):
         p = Preferences(self.gui)
@@ -680,6 +682,26 @@ class Boss(QObject):
         if anchor:
             editor.go_to_anchor(anchor)
 
+    @in_thread_job
+    def check_item_activated(self, item):
+        name = item.name
+        if name in editors:
+            editor = editors[name]
+            self.gui.central.show_editor(editor)
+        else:
+            syntax = syntax_from_mime(name, current_container().mime_map[name])
+            editor = self.edit_file(name, syntax)
+        if editor.has_line_numbers:
+            editor.go_to_line(item.line, item.col)
+            editor.set_focus()
+
+    @in_thread_job
+    def check_requested(self, *args):
+        c = self.gui.check_book
+        c.parent().show()
+        c.parent().raise_()
+        c.run_checks(current_container())
+
     @in_thread_job
     def merge_requested(self, category, names, master):
         self.commit_all_editors_to_container()
@@ -733,6 +755,7 @@ class Boss(QObject):
         editor.data_changed.connect(self.editor_data_changed)
         editor.copy_available_state_changed.connect(self.editor_copy_available_state_changed)
         editor.cursor_position_changed.connect(self.sync_preview_to_editor)
+        editor.cursor_position_changed.connect(self.update_cursor_position)
         if data is not None:
             if use_template:
                 editor.init_from_template(data)
@@ -818,6 +841,7 @@ class Boss(QObject):
 
     def apply_current_editor_state(self):
         ed = self.gui.central.current_editor
+        self.gui.cursor_position_widget.update_position()
         if ed is not None:
             actions['editor-undo'].setEnabled(ed.undo_available)
             actions['editor-redo'].setEnabled(ed.redo_available)
@@ -832,9 +856,18 @@ class Boss(QObject):
                     break
             if name is not None and getattr(ed, 'syntax', None) == 'html':
                 self.gui.preview.show(name)
+            if ed.has_line_numbers:
+                self.gui.cursor_position_widget.update_position(*ed.cursor_position)
         else:
             actions['go-to-line-number'].setEnabled(False)
 
+    def update_cursor_position(self):
+        ed = self.gui.central.current_editor
+        if getattr(ed, 'has_line_numbers', False):
+            self.gui.cursor_position_widget.update_position(*ed.cursor_position)
+        else:
+            self.gui.cursor_position_widget.update_position()
+
     def editor_close_requested(self, editor):
         name = None
         for n, ed in editors.iteritems():

src/calibre/gui2/tweak_book/check.py

@@ -0,0 +1,126 @@
+#!/usr/bin/env python
+# vim:fileencoding=utf-8
+from __future__ import (unicode_literals, division, absolute_import,
+                        print_function)
+
+__license__ = 'GPL v3'
+__copyright__ = '2013, Kovid Goyal <kovid at kovidgoyal.net>'
+
+import sys
+
+from PyQt4.Qt import (
+     QIcon, Qt, QHBoxLayout, QListWidget, QTextBrowser, QWidget,
+    QListWidgetItem, pyqtSignal, QApplication)
+
+from calibre.ebooks.oeb.polish.check.base import WARN, INFO, DEBUG, ERROR, CRITICAL
+from calibre.ebooks.oeb.polish.check.main import run_checks
+
+def icon_for_level(level):
+    if level > WARN:
+        icon = 'dialog_error.png'
+    elif level == WARN:
+        icon = 'dialog_warning.png'
+    elif level == INFO:
+        icon = 'dialog_information.png'
+    else:
+        icon = None
+    return QIcon(I(icon)) if icon else QIcon()
+
+class Check(QWidget):
+
+    item_activated = pyqtSignal(object)
+    check_requested = pyqtSignal()
+
+    def __init__(self, parent=None):
+        QWidget.__init__(self, parent)
+
+        self.l = l = QHBoxLayout(self)
+        self.setLayout(l)
+        self.items = i = QListWidget(self)
+        self.items.setSpacing(2)
+        self.items.itemDoubleClicked.connect(self.current_item_activated)
+        self.items.currentItemChanged.connect(self.current_item_changed)
+        l.addWidget(i)
+        self.help = h = QTextBrowser(self)
+        h.anchorClicked.connect(self.link_clicked)
+        h.setOpenLinks(False)
+        l.addWidget(h)
+        h.setMaximumWidth(250)
+        self.clear_help(_('Check has not been run'))
+
+    def clear_help(self, msg):
+        self.help.setText('<h2>%s</h2><p><a href="run:check">%s</a></p>' % (
+            msg, _('Run check')))
+
+    def link_clicked(self, url):
+        url = unicode(url.toString())
+        if url == 'activate:item':
+            self.current_item_activated()
+        elif url == 'run:check':
+            self.check_requested.emit()
+
+    def current_item_activated(self, *args):
+        i = self.items.currentItem()
+        if i is not None:
+            err = i.data(Qt.UserRole).toPyObject()
+            self.item_activated.emit(err)
+
+    def current_item_changed(self, *args):
+        i = self.items.currentItem()
+        self.help.setText('')
+        if i is not None:
+            err = i.data(Qt.UserRole).toPyObject()
+            header = {DEBUG:_('Debug'), INFO:_('Information'), WARN:_('Warning'), ERROR:_('Error'), CRITICAL:_('Error')}[err.level]
+            loc = ''
+            if err.line is not None:
+                loc = _('line: %d') % err.line
+            if err.col is not None:
+                loc += ' column: %d' % err.col
+            if loc:
+                loc = ' (%s)' % loc
+            self.help.setText(
+                '''<h2 style="text-align:center">%s</h2>
+                <p>%s</p>
+                <div><a style="text-decoration:none" href="activate:item">%s %s</a></div>
+                ''' % (header, err.msg, err.name, loc))
+
+    def run_checks(self, container):
+        from calibre.gui2.tweak_book.boss import BusyCursor
+        with BusyCursor():
+            self.show_busy()
+            QApplication.processEvents()
+            errors = run_checks(container)
+            self.hide_busy()
+
+        for err in sorted(errors, key=lambda e:(100 - e.level, e.name)):
+            i = QListWidgetItem(err.msg, self.items)
+            i.setData(Qt.UserRole, err)
+            i.setIcon(icon_for_level(err.level))
+        if errors:
+            self.items.item(0).setSelected(True)
+            self.items.setCurrentRow(0)
+            self.current_item_changed()
+        else:
+            self.clear_help(_('No problems found'))
+
+    def show_busy(self, msg=_('Running checks, please wait...')):
+        self.help.setText(msg)
+        self.items.clear()
+
+    def hide_busy(self):
+        self.help.setText('')
+        self.items.clear()
+
+def main():
+    from calibre.gui2 import Application
+    from calibre.gui2.tweak_book.boss import get_container
+    app = Application([])  # noqa
+    path = sys.argv[-1]
+    container = get_container(path)
+    d = Check()
+    d.run_checks(container)
+    d.show()
+    app.exec_()
+
+if __name__ == '__main__':
+    main()

src/calibre/gui2/tweak_book/editor/text.py

@@ -181,7 +181,7 @@ class TextEdit(QPlainTextEdit):
         self.setTextCursor(c)
         self.ensureCursorVisible()
 
-    def go_to_line(self, lnum):
+    def go_to_line(self, lnum, col=None):
         lnum = max(1, min(self.blockCount(), lnum))
         c = self.textCursor()
         c.clearSelection()
@@ -190,10 +190,16 @@ class TextEdit(QPlainTextEdit):
         c.movePosition(c.StartOfLine)
         c.movePosition(c.EndOfLine, c.KeepAnchor)
         text = unicode(c.selectedText())
-        c.movePosition(c.StartOfLine)
-        lt = text.lstrip()
-        if text and lt and lt != text:
-            c.movePosition(c.NextWord)
+        if col is None:
+            c.movePosition(c.StartOfLine)
+            lt = text.lstrip()
+            if text and lt and lt != text:
+                c.movePosition(c.NextWord)
+        else:
+            c.setPosition(c.block().position() + col)
+            if c.blockNumber() + 1 > lnum:
+                c.movePosition(c.PreviousBlock)
+                c.movePosition(c.EndOfBlock)
         self.setTextCursor(c)
         self.ensureCursorVisible()
 

src/calibre/gui2/tweak_book/editor/widget.py

@@ -176,12 +176,20 @@ class Editor(QMainWindow):
     def _cursor_position_changed(self, *args):
         self.cursor_position_changed.emit()
 
+    @property
+    def cursor_position(self):
+        c = self.editor.textCursor()
+        return (c.blockNumber() + 1, c.positionInBlock())
+
     def cut(self):
         self.editor.cut()
 
     def copy(self):
         self.editor.copy()
 
+    def go_to_line(self, line, col=None):
+        self.editor.go_to_line(line, col=col)
+
     def paste(self):
         if not self.editor.canPaste():
             return error_dialog(self, _('No text'), _(

src/calibre/gui2/tweak_book/ui.py

@@ -10,7 +10,8 @@ from functools import partial
 
 from PyQt4.Qt import (
     QDockWidget, Qt, QLabel, QIcon, QAction, QApplication, QWidget, QEvent,
-    QVBoxLayout, QStackedWidget, QTabWidget, QImage, QPixmap, pyqtSignal, QMenu)
+    QVBoxLayout, QStackedWidget, QTabWidget, QImage, QPixmap, pyqtSignal,
+    QMenu, QHBoxLayout)
 
 from calibre.constants import __appname__, get_version
 from calibre.gui2 import elided_text
@@ -22,6 +23,7 @@ from calibre.gui2.tweak_book.job import BlockingJob
 from calibre.gui2.tweak_book.boss import Boss
 from calibre.gui2.tweak_book.preview import Preview
 from calibre.gui2.tweak_book.search import SearchPanel
+from calibre.gui2.tweak_book.check import Check
 
 class Central(QStackedWidget):
 
@@ -155,6 +157,25 @@ class Central(QStackedWidget):
 
         return True
 
+class CursorPositionWidget(QWidget):
+
+    def __init__(self, parent):
+        QWidget.__init__(self, parent)
+        self.l = QHBoxLayout(self)
+        self.setLayout(self.l)
+        self.la = QLabel('')
+        self.l.addWidget(self.la)
+        self.l.setContentsMargins(0, 0, 0, 0)
+        f = self.la.font()
+        f.setBold(False)
+        self.la.setFont(f)
+
+    def update_position(self, line=None, col=None):
+        if line is None:
+            self.la.setText('')
+        else:
+            self.la.setText(_('Line: {0} : {1}').format(line, col))
+
 class Main(MainWindow):
 
     APP_NAME = _('Tweak Book')
@@ -182,6 +203,8 @@ class Main(MainWindow):
 
         self.status_bar = self.statusBar()
         self.status_bar.addPermanentWidget(self.boss.save_manager.status_widget)
+        self.cursor_position_widget = CursorPositionWidget(self)
+        self.status_bar.addPermanentWidget(self.cursor_position_widget)
         self.status_bar.addWidget(QLabel(_('{0} {1} created by {2}').format(__appname__, get_version(), 'Kovid Goyal')))
         f = self.status_bar.font()
         f.setBold(True)
@@ -259,6 +282,7 @@ class Main(MainWindow):
                                            _('Beautify current file'))
         self.action_pretty_all = reg('format-justify-fill.png', _('&Beautify all files'), partial(self.boss.pretty_print, False), 'pretty-all', (),
                                        _('Beautify all files'))
+        self.action_check_book = reg('debug.png', _('&Check Book'), self.boss.check_requested, 'check-book', ('F7'), _('Check book for errors'))
 
         # Polish actions
         group = _('Polish Book')
@@ -355,6 +379,7 @@ class Main(MainWindow):
         e.addAction(self.action_smarten_punctuation)
         e.addAction(self.action_fix_html_all)
         e.addAction(self.action_pretty_all)
+        e.addAction(self.action_check_book)
 
         e = b.addMenu(_('&View'))
         t = e.addMenu(_('Tool&bars'))
@@ -403,7 +428,7 @@ class Main(MainWindow):
             return b
 
         a = create(_('Book tool bar'), 'global').addAction
-        for x in ('new_file', 'open_book', 'global_undo', 'global_redo', 'save', 'create_checkpoint', 'toc'):
+        for x in ('new_file', 'open_book', 'global_undo', 'global_redo', 'save', 'create_checkpoint', 'toc', 'check_book'):
             a(getattr(self, 'action_' + x))
 
         a = create(_('Polish book tool bar'), 'polish').addAction
@@ -436,6 +461,13 @@ class Main(MainWindow):
         d.setWidget(self.preview)
         self.addDockWidget(Qt.RightDockWidgetArea, d)
 
+        d = create(_('Check Book'), 'check-book')
+        d.setAllowedAreas(Qt.LeftDockWidgetArea | Qt.RightDockWidgetArea | Qt.BottomDockWidgetArea | Qt.TopDockWidgetArea)
+        self.check_book = Check(self)
+        d.setWidget(self.check_book)
+        self.addDockWidget(Qt.TopDockWidgetArea, d)
+        d.close()  # By default the check window is closed
+
         d = create(_('Inspector'), 'inspector')
         d.setAllowedAreas(Qt.LeftDockWidgetArea | Qt.RightDockWidgetArea | Qt.BottomDockWidgetArea | Qt.TopDockWidgetArea)
         d.setWidget(self.preview.inspector)