contextmenu.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, 2007 Apple Inc. All rights reserved.
 * Copyright (C) 2008 Christian Dywan <[e-mail]>
 *
 * 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 "ContextMenu.h"

#include "ContextMenuController.h"
#include "CSSComputedStyleDeclaration.h"
#include "CSSProperty.h"
#include "CSSPropertyNames.h"
#include "CString.h"
#include "Document.h"
#include "DocumentLoader.h"
#include "Editor.h"
#include "Frame.h"
#include "FrameLoader.h"
#include "KURL.h"
#include "LocalizedStrings.h"
#include "Node.h"
#include "Page.h"
#include "ResourceRequest.h"
#include "SelectionController.h"
#include "Settings.h"
#include "TextIterator.h"
#include <memory>

using namespace std;
using namespace WTF;
using namespace Unicode;

namespace WebCore {

ContextMenuController* ContextMenu::controller() const
{
    if (Node* node = m_hitTestResult.innerNonSharedNode())
        if (Frame* frame = node->document()->frame())
            if (Page* page = frame->page())
                return page->contextMenuController();
    return 0;
}

static auto_ptr<ContextMenuItem> separatorItem()
{
    return auto_ptr<ContextMenuItem>(new ContextMenuItem(SeparatorType, ContextMenuItemTagNoAction, String()));
}

static void createAndAppendFontSubMenu(const HitTestResult& result, ContextMenuItem& fontMenuItem)
{
    ContextMenu fontMenu(result);

#if PLATFORM(MAC)
    ContextMenuItem showFonts(ActionType, ContextMenuItemTagShowFonts, contextMenuItemTagShowFonts());
#endif
    ContextMenuItem bold(CheckableActionType, ContextMenuItemTagBold, contextMenuItemTagBold());
    ContextMenuItem italic(CheckableActionType, ContextMenuItemTagItalic, contextMenuItemTagItalic());
    ContextMenuItem underline(CheckableActionType, ContextMenuItemTagUnderline, contextMenuItemTagUnderline());
    ContextMenuItem outline(ActionType, ContextMenuItemTagOutline, contextMenuItemTagOutline());
#if PLATFORM(MAC)
    ContextMenuItem styles(ActionType, ContextMenuItemTagStyles, contextMenuItemTagStyles());
    ContextMenuItem showColors(ActionType, ContextMenuItemTagShowColors, contextMenuItemTagShowColors());
#endif

#if PLATFORM(MAC)
    fontMenu.appendItem(showFonts);
#endif
    fontMenu.appendItem(bold);
    fontMenu.appendItem(italic);
    fontMenu.appendItem(underline);
    fontMenu.appendItem(outline);
#if PLATFORM(MAC)
    fontMenu.appendItem(styles);
    fontMenu.appendItem(*separatorItem());
    fontMenu.appendItem(showColors);
#endif

    fontMenuItem.setSubMenu(&fontMenu);
}

#ifndef BUILDING_ON_TIGER
static void createAndAppendSpellingAndGrammarSubMenu(const HitTestResult& result, ContextMenuItem& spellingAndGrammarMenuItem)
{
    ContextMenu spellingAndGrammarMenu(result);

    ContextMenuItem showSpellingPanel(ActionType, ContextMenuItemTagShowSpellingPanel, 
        contextMenuItemTagShowSpellingPanel(true));
    ContextMenuItem checkSpelling(ActionType, ContextMenuItemTagCheckSpelling, 
        contextMenuItemTagCheckSpelling());
    ContextMenuItem checkAsYouType(CheckableActionType, ContextMenuItemTagCheckSpellingWhileTyping, 
        contextMenuItemTagCheckSpellingWhileTyping());
    ContextMenuItem grammarWithSpelling(CheckableActionType, ContextMenuItemTagCheckGrammarWithSpelling, 
        contextMenuItemTagCheckGrammarWithSpelling());

    spellingAndGrammarMenu.appendItem(showSpellingPanel);
    spellingAndGrammarMenu.appendItem(checkSpelling);
    spellingAndGrammarMenu.appendItem(checkAsYouType);
    spellingAndGrammarMenu.appendItem(grammarWithSpelling);

    spellingAndGrammarMenuItem.setSubMenu(&spellingAndGrammarMenu);
}
#else

static void createAndAppendSpellingSubMenu(const HitTestResult& result, ContextMenuItem& spellingMenuItem)
{
    ContextMenu spellingMenu(result);

    ContextMenuItem showSpellingPanel(ActionType, ContextMenuItemTagShowSpellingPanel, 
        contextMenuItemTagShowSpellingPanel(true));
    ContextMenuItem checkSpelling(ActionType, ContextMenuItemTagCheckSpelling, 
        contextMenuItemTagCheckSpelling());
    ContextMenuItem checkAsYouType(CheckableActionType, ContextMenuItemTagCheckSpellingWhileTyping, 
        contextMenuItemTagCheckSpellingWhileTyping());

    spellingMenu.appendItem(showSpellingPanel);
    spellingMenu.appendItem(checkSpelling);
    spellingMenu.appendItem(checkAsYouType);

    spellingMenuItem.setSubMenu(&spellingMenu);
}
#endif

#if PLATFORM(MAC)
static void createAndAppendSpeechSubMenu(const HitTestResult& result, ContextMenuItem& speechMenuItem)
{
    ContextMenu speechMenu(result);

    ContextMenuItem start(ActionType, ContextMenuItemTagStartSpeaking, contextMenuItemTagStartSpeaking());
    ContextMenuItem stop(ActionType, ContextMenuItemTagStopSpeaking, contextMenuItemTagStopSpeaking());

    speechMenu.appendItem(start);
    speechMenu.appendItem(stop);

    speechMenuItem.setSubMenu(&speechMenu);
}
#endif
 
#if !PLATFORM(GTK)
static void createAndAppendWritingDirectionSubMenu(const HitTestResult& result, ContextMenuItem& writingDirectionMenuItem)
{
    ContextMenu writingDirectionMenu(result);

    ContextMenuItem defaultItem(ActionType, ContextMenuItemTagDefaultDirection, 
        contextMenuItemTagDefaultDirection());
    ContextMenuItem ltr(CheckableActionType, ContextMenuItemTagLeftToRight, contextMenuItemTagLeftToRight());
    ContextMenuItem rtl(CheckableActionType, ContextMenuItemTagRightToLeft, contextMenuItemTagRightToLeft());

    writingDirectionMenu.appendItem(defaultItem);
    writingDirectionMenu.appendItem(ltr);
    writingDirectionMenu.appendItem(rtl);

    writingDirectionMenuItem.setSubMenu(&writingDirectionMenu);
}

static void createAndAppendTextDirectionSubMenu(const HitTestResult& result, ContextMenuItem& textDirectionMenuItem)
{
    ContextMenu textDirectionMenu(result);

    ContextMenuItem defaultItem(ActionType, ContextMenuItemTagTextDirectionDefault, contextMenuItemTagDefaultDirection());
    ContextMenuItem ltr(CheckableActionType, ContextMenuItemTagTextDirectionLeftToRight, contextMenuItemTagLeftToRight());
    ContextMenuItem rtl(CheckableActionType, ContextMenuItemTagTextDirectionRightToLeft, contextMenuItemTagRightToLeft());

    textDirectionMenu.appendItem(defaultItem);
    textDirectionMenu.appendItem(ltr);
    textDirectionMenu.appendItem(rtl);

    textDirectionMenuItem.setSubMenu(&textDirectionMenu);
}
#endif

static bool selectionContainsPossibleWord(Frame* frame)
{
    // Current algorithm: look for a character that's not just a separator.
    for (TextIterator it(frame->selection()->toNormalizedRange().get()); !it.atEnd(); it.advance()) {
        int length = it.length();
        const UChar* characters = it.characters();
        for (int i = 0; i < length; ++i)
            if (!(category(characters[i]) & (Separator_Space | Separator_Line | Separator_Paragraph)))
                return true;
    }
    return false;
}

void ContextMenu::populate()
{
    ContextMenuItem OpenLinkItem(ActionType, ContextMenuItemTagOpenLink, contextMenuItemTagOpenLink());
    ContextMenuItem OpenLinkInNewWindowItem(ActionType, ContextMenuItemTagOpenLinkInNewWindow, 
        contextMenuItemTagOpenLinkInNewWindow());
    ContextMenuItem DownloadFileItem(ActionType, ContextMenuItemTagDownloadLinkToDisk, 
        contextMenuItemTagDownloadLinkToDisk());
    ContextMenuItem CopyLinkItem(ActionType, ContextMenuItemTagCopyLinkToClipboard, 
        contextMenuItemTagCopyLinkToClipboard());
    ContextMenuItem OpenImageInNewWindowItem(ActionType, ContextMenuItemTagOpenImageInNewWindow, 
        contextMenuItemTagOpenImageInNewWindow());
    ContextMenuItem DownloadImageItem(ActionType, ContextMenuItemTagDownloadImageToDisk, 
        contextMenuItemTagDownloadImageToDisk());
    ContextMenuItem CopyImageItem(ActionType, ContextMenuItemTagCopyImageToClipboard, 
        contextMenuItemTagCopyImageToClipboard());
#if PLATFORM(MAC)
    ContextMenuItem SearchSpotlightItem(ActionType, ContextMenuItemTagSearchInSpotlight, 
        contextMenuItemTagSearchInSpotlight());
    ContextMenuItem LookInDictionaryItem(ActionType, ContextMenuItemTagLookUpInDictionary, 
        contextMenuItemTagLookUpInDictionary());
#endif
    ContextMenuItem SearchWebItem(ActionType, ContextMenuItemTagSearchWeb, contextMenuItemTagSearchWeb());
    ContextMenuItem CopyItem(ActionType, ContextMenuItemTagCopy, contextMenuItemTagCopy());
    ContextMenuItem BackItem(ActionType, ContextMenuItemTagGoBack, contextMenuItemTagGoBack());
    ContextMenuItem ForwardItem(ActionType, ContextMenuItemTagGoForward,  contextMenuItemTagGoForward());
    ContextMenuItem StopItem(ActionType, ContextMenuItemTagStop, contextMenuItemTagStop());
    ContextMenuItem ReloadItem(ActionType, ContextMenuItemTagReload, contextMenuItemTagReload());
    ContextMenuItem OpenFrameItem(ActionType, ContextMenuItemTagOpenFrameInNewWindow, 
        contextMenuItemTagOpenFrameInNewWindow());
    ContextMenuItem NoGuessesItem(ActionType, ContextMenuItemTagNoGuessesFound, 
        contextMenuItemTagNoGuessesFound());
    ContextMenuItem IgnoreSpellingItem(ActionType, ContextMenuItemTagIgnoreSpelling, 
        contextMenuItemTagIgnoreSpelling());
    ContextMenuItem LearnSpellingItem(ActionType, ContextMenuItemTagLearnSpelling, 
        contextMenuItemTagLearnSpelling());
    ContextMenuItem IgnoreGrammarItem(ActionType, ContextMenuItemTagIgnoreGrammar, 
        contextMenuItemTagIgnoreGrammar());
    ContextMenuItem CutItem(ActionType, ContextMenuItemTagCut, contextMenuItemTagCut());
    ContextMenuItem PasteItem(ActionType, ContextMenuItemTagPaste, contextMenuItemTagPaste());
#if PLATFORM(GTK)
    ContextMenuItem DeleteItem(ActionType, ContextMenuItemTagDelete, contextMenuItemTagDelete());
    ContextMenuItem SelectAllItem(ActionType, ContextMenuItemTagSelectAll, contextMenuItemTagSelectAll());
#endif
    
    HitTestResult result = hitTestResult();
    
    Node* node = m_hitTestResult.innerNonSharedNode();
    if (!node)
        return;
#if PLATFORM(GTK)
    if (!result.isContentEditable() && (node->isElementNode() && static_cast<Element*>(node)->isFormControlElement()))
        return;
#endif
    Frame* frame = node->document()->frame();
    if (!frame)
        return;

    if (!result.isContentEditable()) {
        FrameLoader* loader = frame->loader();
        KURL linkURL = result.absoluteLinkURL();
        if (!linkURL.isEmpty()) {
            if (loader->canHandleRequest(ResourceRequest(linkURL))) {
                appendItem(OpenLinkItem);
                appendItem(OpenLinkInNewWindowItem);
                appendItem(DownloadFileItem);
            }
            appendItem(CopyLinkItem);
        }

        KURL imageURL = result.absoluteImageURL();
        if (!imageURL.isEmpty()) {
            if (!linkURL.isEmpty())
                appendItem(*separatorItem());

            appendItem(OpenImageInNewWindowItem);
            appendItem(DownloadImageItem);
            if (imageURL.isLocalFile() || m_hitTestResult.image())
                appendItem(CopyImageItem);
        }

        if (imageURL.isEmpty() && linkURL.isEmpty()) {
            if (result.isSelected()) {
                if (selectionContainsPossibleWord(frame)) {
#if PLATFORM(MAC)
                    appendItem(SearchSpotlightItem);
#endif
                    appendItem(SearchWebItem);
                    appendItem(*separatorItem());
#if PLATFORM(MAC)
                    appendItem(LookInDictionaryItem);
                    appendItem(*separatorItem());
#endif
                }
                appendItem(CopyItem);
            } else {
#if PLATFORM(GTK)
                appendItem(BackItem);
                appendItem(ForwardItem);
                appendItem(StopItem);
                appendItem(ReloadItem);
#else
                if (loader->canGoBackOrForward(-1))
                    appendItem(BackItem);

                if (loader->canGoBackOrForward(1))
                    appendItem(ForwardItem);

                // use isLoadingInAPISense rather than isLoading because Stop/Reload are
                // intended to match WebKit's API, not WebCore's internal notion of loading status
                if (loader->documentLoader()->isLoadingInAPISense())
                    appendItem(StopItem);
                else
                    appendItem(ReloadItem);
#endif

                if (frame->page() && frame != frame->page()->mainFrame())
                    appendItem(OpenFrameItem);
            }
        }
    } else { // Make an editing context menu
        SelectionController* selection = frame->selection();
        bool inPasswordField = selection->isInPasswordField();
        
        if (!inPasswordField) {