TextInsertionBaseCommand.cpp   [plain text]


/*
 * Copyright (C) 2012 Apple Inc. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
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 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
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 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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#include "config.h"
#include "TextInsertionBaseCommand.h"

#include "BeforeTextInsertedEvent.h"
#include "Document.h"
#include "Element.h"
#include "Frame.h"
#include "FrameSelection.h"
#include "Node.h"

namespace WebCore {

TextInsertionBaseCommand::TextInsertionBaseCommand(Document& document)
    : CompositeEditCommand(document)
{
}

void TextInsertionBaseCommand::applyTextInsertionCommand(Frame* frame, PassRefPtr<TextInsertionBaseCommand> command, const VisibleSelection& selectionForInsertion, const VisibleSelection& endingSelection)
{
    bool changeSelection = selectionForInsertion != endingSelection;
    if (changeSelection) {
        command->setStartingSelection(selectionForInsertion);
        command->setEndingSelection(selectionForInsertion);
    }
    applyCommand(command);
    if (changeSelection) {
        command->setEndingSelection(endingSelection);
        frame->selection().setSelection(endingSelection);
    }
}

String dispatchBeforeTextInsertedEvent(const String& text, const VisibleSelection& selectionForInsertion, bool insertionIsForUpdatingComposition)
{
    if (insertionIsForUpdatingComposition)
        return text;

    String newText = text;
    if (Node* startNode = selectionForInsertion.start().containerNode()) {
        if (startNode->rootEditableElement()) {
            // Send BeforeTextInsertedEvent. The event handler will update text if necessary.
            RefPtr<BeforeTextInsertedEvent> evt = BeforeTextInsertedEvent::create(text);
            startNode->rootEditableElement()->dispatchEvent(evt, IGNORE_EXCEPTION);
            newText = evt->text();
        }
    }
    return newText;
}

bool canAppendNewLineFeedToSelection(const VisibleSelection& selection)
{
    Node* node = selection.rootEditableElement();
    if (!node)
        return false;
    
    RefPtr<BeforeTextInsertedEvent> event = BeforeTextInsertedEvent::create(String("\n"));
    node->dispatchEvent(event, IGNORE_EXCEPTION);
    return event->text().length();
}

}