editorcommand.cpp

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    return true;
}

static bool executeCut(Frame* frame, Event*, EditorCommandSource, const String&)
{
    frame->editor()->cut();
    return true;
}

static bool executeDelete(Frame* frame, Event*, EditorCommandSource source, const String&)
{
    switch (source) {
        case CommandFromMenuOrKeyBinding:
            // Doesn't modify the text if the current selection isn't a range.
            frame->editor()->performDelete();
            return true;
        case CommandFromDOM:
        case CommandFromDOMWithUserInterface:
            // If the current selection is a caret, delete the preceding character. IE performs forwardDelete, but we currently side with Firefox.
            // Doesn't scroll to make the selection visible, or modify the kill ring (this time, siding with IE, not Firefox).
            TypingCommand::deleteKeyPressed(frame->document(), frame->selectionGranularity() == WordGranularity);
            return true;
    }
    ASSERT_NOT_REACHED();
    return false;
}

static bool executeDeleteBackward(Frame* frame, Event*, EditorCommandSource, const String&)
{
    frame->editor()->deleteWithDirection(SelectionController::BACKWARD, CharacterGranularity, false, true);
    return true;
}

static bool executeDeleteBackwardByDecomposingPreviousCharacter(Frame* frame, Event*, EditorCommandSource, const String&)
{
    LOG_ERROR("DeleteBackwardByDecomposingPreviousCharacter is not implemented, doing DeleteBackward instead");
    frame->editor()->deleteWithDirection(SelectionController::BACKWARD, CharacterGranularity, false, true);
    return true;
}

static bool executeDeleteForward(Frame* frame, Event*, EditorCommandSource, const String&)
{
    frame->editor()->deleteWithDirection(SelectionController::FORWARD, CharacterGranularity, false, true);
    return true;
}

static bool executeDeleteToBeginningOfLine(Frame* frame, Event*, EditorCommandSource, const String&)
{
    frame->editor()->deleteWithDirection(SelectionController::BACKWARD, LineBoundary, true, false);
    return true;
}

static bool executeDeleteToBeginningOfParagraph(Frame* frame, Event*, EditorCommandSource, const String&)
{
    frame->editor()->deleteWithDirection(SelectionController::BACKWARD, ParagraphBoundary, true, false);
    return true;
}

static bool executeDeleteToEndOfLine(Frame* frame, Event*, EditorCommandSource, const String&)
{
    // Despite its name, this command should delete the newline at the end of
    // a paragraph if you are at the end of a paragraph (like DeleteToEndOfParagraph).
    frame->editor()->deleteWithDirection(SelectionController::FORWARD, LineBoundary, true, false);
    return true;
}

static bool executeDeleteToEndOfParagraph(Frame* frame, Event*, EditorCommandSource, const String&)
{
    // Despite its name, this command should delete the newline at the end of
    // a paragraph if you are at the end of a paragraph.
    frame->editor()->deleteWithDirection(SelectionController::FORWARD, ParagraphBoundary, true, false);
    return true;
}

static bool executeDeleteToMark(Frame* frame, Event*, EditorCommandSource, const String&)
{
    RefPtr<Range> mark = frame->mark().toNormalizedRange();
    if (mark) {
        SelectionController* selection = frame->selection();
        bool selected = selection->setSelectedRange(unionDOMRanges(mark.get(), frame->editor()->selectedRange().get()).get(), DOWNSTREAM, true);
        ASSERT(selected);
        if (!selected)
            return false;
    }
    frame->editor()->performDelete();
    frame->setMark(frame->selection()->selection());
    return true;
}

static bool executeDeleteWordBackward(Frame* frame, Event*, EditorCommandSource, const String&)
{
    frame->editor()->deleteWithDirection(SelectionController::BACKWARD, WordGranularity, true, false);
    return true;
}

static bool executeDeleteWordForward(Frame* frame, Event*, EditorCommandSource, const String&)
{
    frame->editor()->deleteWithDirection(SelectionController::FORWARD, WordGranularity, true, false);
    return true;
}

static bool executeFindString(Frame* frame, Event*, EditorCommandSource, const String& value)
{
    return frame->findString(value, true, false, true, false);
}

static bool executeFontName(Frame* frame, Event*, EditorCommandSource source, const String& value)
{
    return executeApplyStyle(frame, source, EditActionSetFont, CSSPropertyFontFamily, value);
}

static bool executeFontSize(Frame* frame, Event*, EditorCommandSource source, const String& value)
{
    int size;
    if (!HTMLFontElement::cssValueFromFontSizeNumber(value, size))
        return false;
    return executeApplyStyle(frame, source, EditActionChangeAttributes, CSSPropertyFontSize, size);
}

static bool executeFontSizeDelta(Frame* frame, Event*, EditorCommandSource source, const String& value)
{
    return executeApplyStyle(frame, source, EditActionChangeAttributes, CSSPropertyWebkitFontSizeDelta, value);
}

static bool executeForeColor(Frame* frame, Event*, EditorCommandSource source, const String& value)
{
    return executeApplyStyle(frame, source, EditActionSetColor, CSSPropertyColor, value);
}

static bool executeFormatBlock(Frame* frame, Event*, EditorCommandSource, const String& value)
{
    String tagName = value.lower();
    if (tagName[0] == '<' && tagName[tagName.length() - 1] == '>')
        tagName = tagName.substring(1, tagName.length() - 2);
    if (!validBlockTag(tagName))
        return false;
    applyCommand(FormatBlockCommand::create(frame->document(), tagName));
    return true;
}

static bool executeForwardDelete(Frame* frame, Event*, EditorCommandSource source, const String&)
{
    switch (source) {
        case CommandFromMenuOrKeyBinding:
            frame->editor()->deleteWithDirection(SelectionController::FORWARD, CharacterGranularity, false, true);
            return true;
        case CommandFromDOM:
        case CommandFromDOMWithUserInterface:
            // Doesn't scroll to make the selection visible, or modify the kill ring.
            // ForwardDelete is not implemented in IE or Firefox, so this behavior is only needed for
            // backward compatibility with ourselves, and for consistency with Delete.
            TypingCommand::forwardDeleteKeyPressed(frame->document());
            return true;
    }
    ASSERT_NOT_REACHED();
    return false;
}

static bool executeIgnoreSpelling(Frame* frame, Event*, EditorCommandSource, const String&)
{
    frame->editor()->ignoreSpelling();
    return true;
}

static bool executeIndent(Frame* frame, Event*, EditorCommandSource, const String&)
{
    applyCommand(IndentOutdentCommand::create(frame->document(), IndentOutdentCommand::Indent));
    return true;
}

static bool executeInsertBacktab(Frame* frame, Event* event, EditorCommandSource, const String&)
{
    return targetFrame(frame, event)->eventHandler()->handleTextInputEvent("\t", event, false, true);
}

static bool executeInsertHorizontalRule(Frame* frame, Event*, EditorCommandSource, const String& value)
{
    RefPtr<HTMLElement> hr = new HTMLElement(hrTag, frame->document());
    if (!value.isEmpty())
        hr->setId(value);
    return executeInsertNode(frame, hr.release());
}

static bool executeInsertHTML(Frame* frame, Event*, EditorCommandSource, const String& value)
{
    return executeInsertFragment(frame, createFragmentFromMarkup(frame->document(), value, ""));
}

static bool executeInsertImage(Frame* frame, Event*, EditorCommandSource, const String& value)
{
    // FIXME: If userInterface is true, we should display a dialog box and let the user choose a local image.
    RefPtr<HTMLImageElement> image = new HTMLImageElement(imgTag, frame->document());
    image->setSrc(value);
    return executeInsertNode(frame, image.release());
}

static bool executeInsertLineBreak(Frame* frame, Event* event, EditorCommandSource source, const String&)
{
    switch (source) {
        case CommandFromMenuOrKeyBinding:
            return targetFrame(frame, event)->eventHandler()->handleTextInputEvent("\n", event, true);
        case CommandFromDOM:
        case CommandFromDOMWithUserInterface:
            // Doesn't scroll to make the selection visible, or modify the kill ring.
            // InsertLineBreak is not implemented in IE or Firefox, so this behavior is only needed for
            // backward compatibility with ourselves, and for consistency with other commands.
            TypingCommand::insertLineBreak(frame->document());
            return true;
    }
    ASSERT_NOT_REACHED();
    return false;
}

static bool executeInsertNewline(Frame* frame, Event* event, EditorCommandSource, const String&)
{
    Frame* targetFrame = WebCore::targetFrame(frame, event);
    return targetFrame->eventHandler()->handleTextInputEvent("\n", event, !targetFrame->editor()->canEditRichly());
}

static bool executeInsertNewlineInQuotedContent(Frame* frame, Event*, EditorCommandSource, const String&)
{
    TypingCommand::insertParagraphSeparatorInQuotedContent(frame->document());
    return true;
}

static bool executeInsertOrderedList(Frame* frame, Event*, EditorCommandSource, const String&)
{
    applyCommand(InsertListCommand::create(frame->document(), InsertListCommand::OrderedList));
    return true;
}

static bool executeInsertParagraph(Frame* frame, Event*, EditorCommandSource, const String&)
{
    TypingCommand::insertParagraphSeparator(frame->document());
    return true;
}

static bool executeInsertTab(Frame* frame, Event* event, EditorCommandSource, const String&)
{
    return targetFrame(frame, event)->eventHandler()->handleTextInputEvent("\t", event, false, false);
}

static bool executeInsertText(Frame* frame, Event*, EditorCommandSource, const String& value)
{
    TypingCommand::insertText(frame->document(), value);
    return true;
}

static bool executeInsertUnorderedList(Frame* frame, Event*, EditorCommandSource, const String&)
{
    applyCommand(InsertListCommand::create(frame->document(), InsertListCommand::UnorderedList));
    return true;
}

static bool executeJustifyCenter(Frame* frame, Event*, EditorCommandSource source, const String&)
{
    return executeApplyParagraphStyle(frame, source, EditActionCenter, CSSPropertyTextAlign, "center");
}

static bool executeJustifyFull(Frame* frame, Event*, EditorCommandSource source, const String&)
{
    return executeApplyParagraphStyle(frame, source, EditActionJustify, CSSPropertyTextAlign, "justify");
}

static bool executeJustifyLeft(Frame* frame, Event*, EditorCommandSource source, const String&)
{
    return executeApplyParagraphStyle(frame, source, EditActionAlignLeft, CSSPropertyTextAlign, "left");
}