editorclientqt.cpp

linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自WebKit

/*
 * Copyright (C) 2006 Nikolas Zimmermann <[e-mail]>
 * Copyright (C) 2006 Zack Rusin <[e-mail]>
 * Copyright (C) 2006, 2008 Apple Computer, Inc.
 * Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies)
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    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 COMPUTER, INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "config.h"
#include "EditorClientQt.h"

#include "qwebpage.h"
#include "qwebpage_p.h"

#include "Document.h"
#include "EditCommandQt.h"
#include "Page.h"
#include "Editor.h"
#include "FocusController.h"
#include "Frame.h"
#include "KeyboardCodes.h"
#include "KeyboardEvent.h"
#include "Page.h"
#include "PlatformKeyboardEvent.h"
#include "NotImplemented.h"
#include "Node.h"
#include "Range.h"

#include <stdio.h>

#include <QUndoStack>
#define methodDebug() qDebug("EditorClientQt: %s", __FUNCTION__);

static bool dumpEditingCallbacks = false;
static bool acceptsEditing = true;
void QWEBKIT_EXPORT qt_dump_editing_callbacks(bool b)
{
    dumpEditingCallbacks = b;
}

void QWEBKIT_EXPORT qt_dump_set_accepts_editing(bool b)
{
    acceptsEditing = b;
}


static QString dumpPath(WebCore::Node *node)
{
    QString str = node->nodeName();

    WebCore::Node *parent = node->parentNode();
    while (parent) {
        str.append(QLatin1String(" > "));
        str.append(parent->nodeName());
        parent = parent->parentNode();
    }
    return str;
}

static QString dumpRange(WebCore::Range *range)
{
    if (!range)
        return QLatin1String("(null)");
    QString str;
    WebCore::ExceptionCode code;
    str.sprintf("range from %ld of %ls to %ld of %ls",
                range->startOffset(code), dumpPath(range->startContainer(code)).unicode(),
                range->endOffset(code), dumpPath(range->endContainer(code)).unicode());
    return str;
}


namespace WebCore {


bool EditorClientQt::shouldDeleteRange(Range* range)
{
    if (dumpEditingCallbacks)
        printf("EDITING DELEGATE: shouldDeleteDOMRange:%s\n", dumpRange(range).toUtf8().constData());

    return true;
}

bool EditorClientQt::shouldShowDeleteInterface(HTMLElement* element)
{
    if (QWebPagePrivate::drtRun)
        return element->className() == "needsDeletionUI";
    return false;
}

bool EditorClientQt::isContinuousSpellCheckingEnabled()
{
    return false;
}

bool EditorClientQt::isGrammarCheckingEnabled()
{
    return false;
}

int EditorClientQt::spellCheckerDocumentTag()
{
    return 0;
}

bool EditorClientQt::shouldBeginEditing(WebCore::Range* range)
{
    if (dumpEditingCallbacks)
        printf("EDITING DELEGATE: shouldBeginEditingInDOMRange:%s\n", dumpRange(range).toUtf8().constData());
    return true;
}

bool EditorClientQt::shouldEndEditing(WebCore::Range* range)
{
    if (dumpEditingCallbacks)
        printf("EDITING DELEGATE: shouldEndEditingInDOMRange:%s\n", dumpRange(range).toUtf8().constData());
    return true;
}

bool EditorClientQt::shouldInsertText(const String& string, Range* range, EditorInsertAction action)
{
    if (dumpEditingCallbacks) {
        static const char *insertactionstring[] = {
            "WebViewInsertActionTyped",
            "WebViewInsertActionPasted",
            "WebViewInsertActionDropped",
        };

        printf("EDITING DELEGATE: shouldInsertText:%s replacingDOMRange:%s givenAction:%s\n",
               QString(string).toUtf8().constData(), dumpRange(range).toUtf8().constData(), insertactionstring[action]);
    }
    return acceptsEditing;
}

bool EditorClientQt::shouldChangeSelectedRange(Range* currentRange, Range* proposedRange, EAffinity selectionAffinity, bool stillSelecting)
{
    if (dumpEditingCallbacks) {
        static const char *affinitystring[] = {
            "NSSelectionAffinityUpstream",
            "NSSelectionAffinityDownstream"
        };
        static const char *boolstring[] = {
            "FALSE",
            "TRUE"
        };

        printf("EDITING DELEGATE: shouldChangeSelectedDOMRange:%s toDOMRange:%s affinity:%s stillSelecting:%s\n",
               dumpRange(currentRange).toUtf8().constData(),
               dumpRange(proposedRange).toUtf8().constData(),
               affinitystring[selectionAffinity], boolstring[stillSelecting]);
    }
    return acceptsEditing;
}

bool EditorClientQt::shouldApplyStyle(WebCore::CSSStyleDeclaration* style,
                                      WebCore::Range* range)
{
    if (dumpEditingCallbacks)
        printf("EDITING DELEGATE: shouldApplyStyle:%s toElementsInDOMRange:%s\n",
               QString(style->cssText()).toUtf8().constData(), dumpRange(range).toUtf8().constData());
    return acceptsEditing;
}

bool EditorClientQt::shouldMoveRangeAfterDelete(WebCore::Range*, WebCore::Range*)
{
    notImplemented();
    return true;
}

void EditorClientQt::didBeginEditing()
{
    if (dumpEditingCallbacks)
        printf("EDITING DELEGATE: webViewDidBeginEditing:WebViewDidBeginEditingNotification\n");
    m_editing = true;
}

void EditorClientQt::respondToChangedContents()
{
    if (dumpEditingCallbacks)
        printf("EDITING DELEGATE: webViewDidChange:WebViewDidChangeNotification\n");
    m_page->d->updateEditorActions();

    emit m_page->contentsChanged();
}

void EditorClientQt::respondToChangedSelection()
{
    if (dumpEditingCallbacks)
        printf("EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification\n");
//     const Selection &selection = m_page->d->page->selection();
//     char buffer[1024];
//     selection.formatForDebugger(buffer, sizeof(buffer));
//     printf("%s\n", buffer);

    m_page->d->updateEditorActions();
    emit m_page->selectionChanged();
    emit m_page->microFocusChanged();
}

void EditorClientQt::didEndEditing()
{
    if (dumpEditingCallbacks)
        printf("EDITING DELEGATE: webViewDidEndEditing:WebViewDidEndEditingNotification\n");
    m_editing = false;
}

void EditorClientQt::didWriteSelectionToPasteboard()
{
}

void EditorClientQt::didSetSelectionTypesForPasteboard()
{
}

bool EditorClientQt::selectWordBeforeMenuEvent()
{
    notImplemented();
    return false;
}

bool EditorClientQt::isEditable()
{ 
    return m_page->isContentEditable();
}

void EditorClientQt::registerCommandForUndo(WTF::PassRefPtr<WebCore::EditCommand> cmd)
{
#ifndef QT_NO_UNDOSTACK
    Frame* frame = m_page->d->page->focusController()->focusedOrMainFrame();
    if (m_inUndoRedo || (frame && !frame->editor()->lastEditCommand() /* HACK!! Don't recreate undos */)) {
        return;
    }
    m_page->undoStack()->push(new EditCommandQt(cmd));
#endif // QT_NO_UNDOSTACK
}

void EditorClientQt::registerCommandForRedo(WTF::PassRefPtr<WebCore::EditCommand>)
{
}

void EditorClientQt::clearUndoRedoOperations()
{
#ifndef QT_NO_UNDOSTACK
    return m_page->undoStack()->clear();
#endif
}

bool EditorClientQt::canUndo() const
{
#ifdef QT_NO_UNDOSTACK
    return false;
#else
    return m_page->undoStack()->canUndo();
#endif
}

bool EditorClientQt::canRedo() const
{
#ifdef QT_NO_UNDOSTACK
    return false;
#else
    return m_page->undoStack()->canRedo();
#endif
}

void EditorClientQt::undo()
{
#ifndef QT_NO_UNDOSTACK
    m_inUndoRedo = true;
    m_page->undoStack()->undo();
    m_inUndoRedo = false;
#endif
}

void EditorClientQt::redo()
{
#ifndef QT_NO_UNDOSTACK