Python Qt.QTextCursor类代码示例

    def reformat_blocks(self, position, removed, added):
        doc = self.doc
        if doc is None or self.ignore_requests or not hasattr(self, 'state_map'):
            return

        block = doc.findBlock(position)
        if not block.isValid():
            return
        start_cursor = QTextCursor(block)
        last_block = doc.findBlock(position + added + (1 if removed > 0 else 0))
        if not last_block.isValid():
            last_block = doc.lastBlock()
        end_cursor = QTextCursor(last_block)
        end_cursor.movePosition(end_cursor.EndOfBlock)
        self.requests.append((start_cursor, end_cursor))
        QTimer.singleShot(0, self.do_one_block)

 def set_document(self, doc, doc_name=None):
     old_doc = self.doc
     if old_doc is not None:
         old_doc.contentsChange.disconnect(self.reformat_blocks)
         c = QTextCursor(old_doc)
         c.beginEditBlock()
         blk = old_doc.begin()
         while blk.isValid():
             blk.layout().clearAdditionalFormats()
             blk = blk.next()
         c.endEditBlock()
     self.doc = self.doc_name = None
     if doc is not None:
         self.doc = doc
         self.doc_name = doc_name
         doc.contentsChange.connect(self.reformat_blocks)
         self.rehighlight()

    def createDocument(self, rootFrame):

        # Create empty document
        self.document = QTextDocument()
        self.document.setUndoRedoEnabled(False)
        self.document.setIndentWidth(20)

        # Register a renderer for custom text objects
        mo = CustomObjectRenderer()
        mo.setParent(self.document)
        self.document.documentLayout().registerHandler(QTextCharFormat.UserObject+1, mo);

        self.cursor = QTextCursor(self.document)
        self.listLevel = 0
        self.paraFormat = None

        # add all root paragraphs
        for n in rootFrame.children:
            self.addNode(n)

        # Clean up the first paragraph if document is not empty
        self.cursor.movePosition(QTextCursor.Start)
        b = self.cursor.block()
        if b.length() == 1:
            cursor = QTextCursor(self.document.findBlockByLineNumber(0))
            cursor.select(QTextCursor.BlockUnderCursor)
            cursor.deleteChar()

        return self.document

 def copy_lines(self, lo, hi, cursor):
     ''' Copy specified lines from the syntax highlighted buffer into the
     destination cursor, preserving all formatting created by the syntax
     highlighter. '''
     num = hi - lo
     if num > 0:
         block = self.findBlockByNumber(lo)
         while num > 0:
             num -= 1
             cursor.insertText(block.text())
             dest_block = cursor.block()
             c = QTextCursor(dest_block)
             for af in block.layout().additionalFormats():
                 start = dest_block.position() + af.start
                 c.setPosition(start), c.setPosition(start + af.length, c.KeepAnchor)
                 c.setCharFormat(af.format)
             cursor.insertBlock()
             cursor.setCharFormat(NULL_FMT)
             block = block.next()

    def show_context_menu(self, pos):
        m = QMenu(self)
        a = m.addAction
        c = self.editor.cursorForPosition(pos)
        origc = QTextCursor(c)
        current_cursor = self.editor.textCursor()
        r = origr = self.editor.syntax_range_for_cursor(c)
        if (r is None or not r.format.property(SPELL_PROPERTY)) and c.positionInBlock() > 0 and not current_cursor.hasSelection():
            c.setPosition(c.position() - 1)
            r = self.editor.syntax_range_for_cursor(c)

        if r is not None and r.format.property(SPELL_PROPERTY):
            word = self.editor.text_for_range(c.block(), r)
            locale = self.editor.spellcheck_locale_for_cursor(c)
            orig_pos = c.position()
            c.setPosition(orig_pos - utf16_length(word))
            found = False
            self.editor.setTextCursor(c)
            if self.editor.find_spell_word([word], locale.langcode, center_on_cursor=False):
                found = True
                fc = self.editor.textCursor()
                if fc.position() < c.position():
                    self.editor.find_spell_word([word], locale.langcode, center_on_cursor=False)
            spell_cursor = self.editor.textCursor()
            if current_cursor.hasSelection():
                # Restore the current cursor so that any selection is preserved
                # for the change case actions
                self.editor.setTextCursor(current_cursor)
            if found:
                suggestions = dictionaries.suggestions(word, locale)[:7]
                if suggestions:
                    for suggestion in suggestions:
                        ac = m.addAction(suggestion, partial(self.editor.simple_replace, suggestion, cursor=spell_cursor))
                        f = ac.font()
                        f.setBold(True), ac.setFont(f)
                    m.addSeparator()
                m.addAction(actions['spell-next'])
                m.addAction(_('Ignore this word'), partial(self._nuke_word, None, word, locale))
                dics = dictionaries.active_user_dictionaries
                if len(dics) > 0:
                    if len(dics) == 1:
                        m.addAction(_('Add this word to the dictionary: {0}').format(dics[0].name), partial(
                            self._nuke_word, dics[0].name, word, locale))
                    else:
                        ac = m.addAction(_('Add this word to the dictionary'))
                        dmenu = QMenu(m)
                        ac.setMenu(dmenu)
                        for dic in dics:
                            dmenu.addAction(dic.name, partial(self._nuke_word, dic.name, word, locale))
                m.addSeparator()

        if origr is not None and origr.format.property(LINK_PROPERTY):
            href = self.editor.text_for_range(origc.block(), origr)
            m.addAction(_('Open %s') % href, partial(self.link_clicked.emit, href))

        if origr is not None and (origr.format.property(TAG_NAME_PROPERTY) or origr.format.property(CSS_PROPERTY)):
            word = self.editor.text_for_range(origc.block(), origr)
            item_type = 'tag_name' if origr.format.property(TAG_NAME_PROPERTY) else 'css_property'
            url = help_url(word, item_type, self.editor.highlighter.doc_name, extra_data=current_container().opf_version)
            if url is not None:
                m.addAction(_('Show help for: %s') % word, partial(open_url, url))

        for x in ('undo', 'redo'):
            ac = actions['editor-%s' % x]
            if ac.isEnabled():
                a(ac)
        m.addSeparator()
        for x in ('cut', 'copy', 'paste'):
            ac = actions['editor-' + x]
            if ac.isEnabled():
                a(ac)
        m.addSeparator()
        m.addAction(_('&Select all'), self.editor.select_all)
        if self.selected_text or self.has_marked_text:
            update_mark_text_action(self)
            m.addAction(actions['mark-selected-text'])
        if self.syntax != 'css' and actions['editor-cut'].isEnabled():
            cm = QMenu(_('Change &case'), m)
            for ac in 'upper lower swap title capitalize'.split():
                cm.addAction(actions['transform-case-' + ac])
            m.addMenu(cm)
        if self.syntax == 'html':
            m.addAction(actions['multisplit'])
        m.exec_(self.editor.viewport().mapToGlobal(pos))

    def resized(self):
        ' Resize images to fit in new view size and adjust all line number references accordingly '
        for v in (self.left, self.right):
            changes = []
            for i, (top, bot, kind) in enumerate(v.changes):
                if top in v.images:
                    img, oldw, oldlines = v.images[top]
                    lines, w = self.get_lines_for_image(img, v)
                    if lines != oldlines:
                        changes.append((i, lines, lines - oldlines, img, w))

            for i, lines, delta, img, w in changes:
                top, bot, kind = v.changes[i]
                c = QTextCursor(v.document().findBlockByNumber(top+1))
                c.beginEditBlock()
                c.movePosition(c.StartOfBlock)
                if delta > 0:
                    for _ in xrange(delta):
                        c.insertBlock()
                else:
                    c.movePosition(c.NextBlock, c.KeepAnchor, -delta)
                    c.removeSelectedText()
                c.endEditBlock()
                v.images[top] = (img, w, lines)
                def mapnum(x):
                    return x if x <= top else x + delta
                lnm = LineNumberMap()
                lnm.max_width = v.line_number_map.max_width
                for x, val in v.line_number_map.iteritems():
                    dict.__setitem__(lnm, mapnum(x), val)
                v.line_number_map = lnm
                v.changes = [(mapnum(t), mapnum(b), k) for t, b, k in v.changes]
                v.headers = [(mapnum(x), name) for x, name in v.headers]
                v.images = OrderedDict((mapnum(x), v) for x, v in v.images.iteritems())
            v.viewport().update()

 def search(self, query, reverse=False):
     ''' Search for query, also searching the headers. Matches in headers
     are not highlighted as managing the highlight is too much of a pain.'''
     if not query.strip():
         return
     c = self.textCursor()
     lnum = c.block().blockNumber()
     cpos = c.positionInBlock()
     headers = dict(self.headers)
     if lnum in headers:
         cpos = self.search_header_pos
     lines = unicode(self.toPlainText()).splitlines()
     for hn, text in self.headers:
         lines[hn] = text
     prefix, postfix = lines[lnum][:cpos], lines[lnum][cpos:]
     before, after = enumerate(lines[0:lnum]), ((lnum+1+i, x) for i, x in enumerate(lines[lnum+1:]))
     if reverse:
         sl = chain([(lnum, prefix)], reversed(tuple(before)), reversed(tuple(after)), [(lnum, postfix)])
     else:
         sl = chain([(lnum, postfix)], after, before, [(lnum, prefix)])
     flags = regex.REVERSE if reverse else 0
     pat = regex.compile(regex.escape(query, special_only=True), flags=regex.UNICODE|regex.IGNORECASE|flags)
     for num, text in sl:
         try:
             m = next(pat.finditer(text))
         except StopIteration:
             continue
         start, end = m.span()
         length = end - start
         if text is postfix:
             start += cpos
         c = QTextCursor(self.document().findBlockByNumber(num))
         c.setPosition(c.position() + start)
         if num in headers:
             self.search_header_pos = start + length
         else:
             c.setPosition(c.position() + length, c.KeepAnchor)
             self.search_header_pos = 0
         if reverse:
             pos, anchor = c.position(), c.anchor()
             c.setPosition(pos), c.setPosition(anchor, c.KeepAnchor)
         self.setTextCursor(c)
         self.centerCursor()
         self.scrolled.emit()
         break
     else:
         info_dialog(self, _('No matches found'), _(
             'No matches found for query: %s' % query), show=True)

class DocumentFactory:
    
    def __init__(self, contentPath, formatManager):
        self.formatManager = formatManager
        self.contentPath = contentPath


    def createDocument(self, rootFrame):

        # Create empty document
        self.document = QTextDocument()
        self.document.setUndoRedoEnabled(False)
        self.document.setIndentWidth(20)

        # Register a renderer for custom text objects
        mo = CustomObjectRenderer()
        mo.setParent(self.document)
        self.document.documentLayout().registerHandler(QTextCharFormat.UserObject+1, mo);

        self.cursor = QTextCursor(self.document)
        self.listLevel = 0
        self.paraFormat = None

        # add all root paragraphs
        for n in rootFrame.children:
            self.addNode(n)

        # Clean up the first paragraph if document is not empty
        self.cursor.movePosition(QTextCursor.Start)
        b = self.cursor.block()
        if b.length() == 1:
            cursor = QTextCursor(self.document.findBlockByLineNumber(0))
            cursor.select(QTextCursor.BlockUnderCursor)
            cursor.deleteChar()

        return self.document


    def addNode(self, node):
        if type(node) == Paragraph:
            self.paraFormat = self.formatManager.getFormat(node.style)

            # NOTE: "The block char format is the format used when inserting 
            #        text at the beginning of an empty block."
            #       See also below.
            self.cursor.insertBlock(self.paraFormat.getBlockFormat(), self.paraFormat.getCharFormat())
            # self.cursor.insertFragment(QTextDocumentFragment.fromPlainText(''))

            if self.listLevel > 0:
                # TODO: use list style from list node - requires a stack, though ...
                listStyle = ('itemizedlist', 'level', str(self.listLevel))
                newList = self.cursor.createList(self.formatManager.getFormat(listStyle).getListFormat())
            for n in node.children:
                self.addNode(n)

        elif type(node) == List:
            self.listLevel += 1
            for n in node.children:
                self.addNode(n)
            self.listLevel -= 1

        elif type(node) is ImageFragment:
            imageObject = ImageObject()
            imagePath = os.path.join(self.contentPath, node.image)
            imageObject.setName(imagePath)

            imageObjectFormat = QTextCharFormat()
            imageObjectFormat.setObjectType(QTextFormat.UserObject + 1)
            imageObjectFormat.setProperty(QTextFormat.UserProperty + 1, imageObject)
            self.cursor.insertText('\ufffc', imageObjectFormat);

        elif type(node) is MathFragment:
            mathFormula = MathFormulaObject()
            mathFormula.setFormula(node.text)
            mathFormula.image = node.image #  renderFormula()

            mathObjectFormat = QTextCharFormat()
            mathObjectFormat.setObjectType(QTextFormat.UserObject + 1)
            mathObjectFormat.setVerticalAlignment(QTextCharFormat.AlignMiddle)
            mathObjectFormat.setProperty(QTextFormat.UserProperty + 1, mathFormula)
            self.cursor.insertText('\ufffc', mathObjectFormat);
        elif type(node) is TextFragment:
            text = node.text.replace('\n', '\u2028')
            if node.href is not None:
                fmt = self.formatManager.getFormat(('link', None, None))   # TODO!
                charFmt = fmt.getCharFormat()
                charFmt.setAnchorHref(node.href)
                self.cursor.insertText(text, charFmt)
            else:
                # "The block char format is the format used when inserting text at the beginning of an empty block.
                # Hence, the block char format is only useful for the first fragment -
                # once a fragment is inserted with a different style, and afterwards
                # another fragment is inserted with no specific style, we need to reset
                # the char format to the block's char format explicitly!
    
                if node.style is not None:
                    fmt = self.formatManager.getFormat(node.style)
                else:
                    fmt = self.paraFormat

#.........这里部分代码省略.........

 def goto_loc(self, loc, operation=QTextCursor.Right, mode=QTextCursor.KeepAnchor, n=0):
     cursor = QTextCursor(self.preview.document())
     cursor.setPosition(loc)
     if n:
         cursor.movePosition(operation, mode, n)
     self.preview.setTextCursor(cursor)

    def find_text(self, pat, cursor):
        from calibre.gui2.tweak_book.text_search import find_text_in_chunks
        chunks = []

        cstart = min(cursor.position(), cursor.anchor())
        cend = max(cursor.position(), cursor.anchor())
        c = QTextCursor(cursor)
        c.setPosition(cstart)
        block = c.block()
        in_text = find_tag_definition(block, 0)[0] is None
        if in_text:
            # Check if we are in comment/PI/etc.
            pb = block.previous()
            while pb.isValid():
                boundaries = pb.userData().non_tag_structures
                if boundaries:
                    if boundaries[-1].is_start:
                        in_text = False
                    break
                pb = pb.previous()

        def append(text, start):
            text = text.replace(PARAGRAPH_SEPARATOR, '\n')
            after = start + len(text)
            if start <= cend and cstart < after:
                extra = after - (cend + 1)
                if extra > 0:
                    text = text[:-extra]
                extra = cstart - start
                if extra > 0:
                    text = text[extra:]
                chunks.append((text, start + max(extra, 0)))

        while block.isValid() and block.position() <= cend:
            ud = block.userData()
            boundaries = sorted(chain(ud.tags, ud.non_tag_structures), key=get_offset)
            if not boundaries:
                # Add the whole line
                if in_text:
                    text = block.text() + '\n'
                    append(text, block.position())
            else:
                start = block.position()
                c.setPosition(start)
                for b in boundaries:
                    if in_text:
                        c.setPosition(start + b.offset, c.KeepAnchor)
                        if c.hasSelection():
                            append(c.selectedText(), c.anchor())
                    in_text = not b.is_start
                    c.setPosition(start + b.offset + 1)
                if in_text:
                    # Add remaining text in block
                    c.setPosition(block.position() + boundaries[-1].offset + 1)
                    c.movePosition(c.EndOfBlock, c.KeepAnchor)
                    if c.hasSelection():
                        append(c.selectedText() + '\n', c.anchor())
            block = block.next()
        s, e = find_text_in_chunks(pat, chunks)
        return s != -1 and e != -1, s, e

    def find_text(self, pat, cursor):
        from calibre.gui2.tweak_book.text_search import find_text_in_chunks
        chunks = []

        cstart = min(cursor.position(), cursor.anchor())
        cend = max(cursor.position(), cursor.anchor())
        c = QTextCursor(cursor)
        c.setPosition(cstart)
        block = c.block()
        in_text = find_tag_definition(block, 0)[0] is None

        def append(text, start):
            after = start + len(text)
            if start <= cend and cstart < after:
                extra = after - (cend + 1)
                if extra > 0:
                    text = text[:-extra]
                extra = cstart - start
                if extra > 0:
                    text = text[extra:]
                chunks.append((text, start + max(extra, 0)))

        while block.isValid() and block.position() <= cend:
            boundaries = sorted(block.userData().tags, key=get_offset)
            if not boundaries:
                # Add the whole line
                if in_text:
                    text = block.text()
                    if text:
                        append(text, block.position())
            else:
                start = block.position()
                c.setPosition(start)
                for b in boundaries:
                    if in_text:
                        c.setPosition(start + b.offset, c.KeepAnchor)
                        if c.hasSelection():
                            append(c.selectedText(), c.anchor())
                    in_text = not b.is_start
                    c.setPosition(start + b.offset + 1)
                if in_text:
                    # Add remaining text in block
                    c.setPosition(block.position() + boundaries[-1].offset + 1)
                    c.movePosition(c.EndOfBlock, c.KeepAnchor)
                    if c.hasSelection():
                        append(c.selectedText(), c.anchor())
            block = block.next()
        s, e = find_text_in_chunks(pat, chunks)
        return s != -1 and e != -1, s, e

def apply_smart_comment(editor, opening='/*', closing='*/', line_comment=None):
    doc = editor.document()
    c = QTextCursor(editor.textCursor())
    c.clearSelection()
    before_opening = doc.find(opening, c, doc.FindBackward | doc.FindCaseSensitively)
    before_closing = doc.find(closing, c, doc.FindBackward | doc.FindCaseSensitively)
    after_opening = doc.find(opening, c, doc.FindCaseSensitively)
    after_closing = doc.find(closing, c, doc.FindCaseSensitively)
    in_block_comment = (not before_opening.isNull() and (before_closing.isNull() or before_opening.position() >= before_closing.position())) and \
        (not after_closing.isNull() and (after_opening.isNull() or after_closing.position() <= after_opening.position()))
    if in_block_comment:
        before_opening.removeSelectedText(), after_closing.removeSelectedText()
        return
    c = QTextCursor(editor.textCursor())
    left, right = min(c.position(), c.anchor()), max(c.position(), c.anchor())
    c.beginEditBlock()
    c.setPosition(right), c.insertText(closing)
    c.setPosition(left), c.insertText(opening)
    c.endEditBlock()