webeditorclient.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.
 *
 * 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 "WebKitDLL.h"
#include "WebEditorClient.h"

#include "WebKit.h"
#include "WebLocalizableStrings.h"
#include "WebView.h"
#include "DOMCoreClasses.h"
#pragma warning(push, 0)
#include <WebCore/BString.h>
#include <WebCore/Document.h>
#include <WebCore/EditCommand.h>
#include <WebCore/HTMLElement.h>
#include <WebCore/HTMLInputElement.h>
#include <WebCore/HTMLNames.h>
#include <WebCore/KeyboardEvent.h>
#include <WebCore/PlatformKeyboardEvent.h>
#include <WebCore/NotImplemented.h>
#include <WebCore/Range.h>
#pragma warning(pop)

using namespace WebCore;
using namespace HTMLNames;

// {09A11D2B-FAFB-4ca0-A6F7-791EE8932C88}
static const GUID IID_IWebUndoCommand = 
{ 0x9a11d2b, 0xfafb, 0x4ca0, { 0xa6, 0xf7, 0x79, 0x1e, 0xe8, 0x93, 0x2c, 0x88 } };

class IWebUndoCommand : public IUnknown {
public:
    virtual void execute() = 0;
};

// WebEditorUndoTarget -------------------------------------------------------------

class WebEditorUndoTarget : public IWebUndoTarget
{
public:
    WebEditorUndoTarget();

    // IUnknown
    virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, void** ppvObject);
    virtual ULONG STDMETHODCALLTYPE AddRef(void);
    virtual ULONG STDMETHODCALLTYPE Release(void);

    // IWebUndoTarget
    virtual HRESULT STDMETHODCALLTYPE invoke( 
        /* [in] */ BSTR actionName,
        /* [in] */ IUnknown *obj);

private:
    ULONG m_refCount;
};

WebEditorUndoTarget::WebEditorUndoTarget()
: m_refCount(1)
{
}

HRESULT STDMETHODCALLTYPE WebEditorUndoTarget::QueryInterface(REFIID riid, void** ppvObject)
{
    *ppvObject = 0;
    if (IsEqualGUID(riid, IID_IUnknown))
        *ppvObject = static_cast<IWebUndoTarget*>(this);
    else if (IsEqualGUID(riid, IID_IWebUndoTarget))
        *ppvObject = static_cast<IWebUndoTarget*>(this);
    else
        return E_NOINTERFACE;

    AddRef();
    return S_OK;
}

ULONG STDMETHODCALLTYPE WebEditorUndoTarget::AddRef(void)
{
    return ++m_refCount;
}

ULONG STDMETHODCALLTYPE WebEditorUndoTarget::Release(void)
{
    ULONG newRef = --m_refCount;
    if (!newRef)
        delete(this);

    return newRef;
}

HRESULT STDMETHODCALLTYPE WebEditorUndoTarget::invoke( 
    /* [in] */ BSTR /*actionName*/,
    /* [in] */ IUnknown *obj)
{
    IWebUndoCommand* undoCommand = 0;
    if (SUCCEEDED(obj->QueryInterface(IID_IWebUndoCommand, (void**)&undoCommand))) {
        undoCommand->execute();
        undoCommand->Release();
    }
    return S_OK;
}

// WebEditorClient ------------------------------------------------------------------

WebEditorClient::WebEditorClient(WebView* webView)
    : m_webView(webView)
    , m_undoTarget(0)
{
    m_undoTarget = new WebEditorUndoTarget();
}

WebEditorClient::~WebEditorClient()
{
    if (m_undoTarget)
        m_undoTarget->Release();
}

void WebEditorClient::pageDestroyed()
{
    delete this;
}

bool WebEditorClient::isContinuousSpellCheckingEnabled()
{
    BOOL enabled;
    if (FAILED(m_webView->isContinuousSpellCheckingEnabled(&enabled)))
        return false;
    return !!enabled;
}

void WebEditorClient::toggleContinuousSpellChecking()
{
    m_webView->toggleContinuousSpellChecking(0);
}

bool WebEditorClient::isGrammarCheckingEnabled()
{
    BOOL enabled;
    if (FAILED(m_webView->isGrammarCheckingEnabled(&enabled)))
        return false;
    return !!enabled;
}

void WebEditorClient::toggleGrammarChecking()
{
    m_webView->toggleGrammarChecking(0);
}

static void initViewSpecificSpelling(IWebViewEditing* viewEditing)
{
    // we just use this as a flag to indicate that we've spell checked the document
    // and need to close the spell checker out when the view closes.
    int tag;
    viewEditing->spellCheckerDocumentTag(&tag);
}

int WebEditorClient::spellCheckerDocumentTag()
{
    // we don't use the concept of spelling tags
    notImplemented();
    ASSERT_NOT_REACHED();
    return 0;
}

bool WebEditorClient::shouldBeginEditing(Range*)
{
    notImplemented();
    return true;
}

bool WebEditorClient::shouldEndEditing(Range*)
{
    notImplemented();
    return true;
}

void WebEditorClient::didBeginEditing()
{
    notImplemented();
}

void WebEditorClient::respondToChangedContents()
{
    notImplemented();
}

void WebEditorClient::respondToChangedSelection()
{
    m_webView->selectionChanged();
}

void WebEditorClient::didEndEditing()
{
    notImplemented();
}

void WebEditorClient::didWriteSelectionToPasteboard()
{
    notImplemented();
}

void WebEditorClient::didSetSelectionTypesForPasteboard()
{
    notImplemented();
}

bool WebEditorClient::shouldDeleteRange(Range* /*range*/)
{
    notImplemented(); 
    return true; 

    // FIXME: calling m_webView->editingDelegate() will cause an assertion failure so we don't want to enable this code until that's implemented. 
    //BOOL result = false;
    //IWebViewEditingDelegate* editingDelegate;
    //// FIXME: DOMRange needs to be implemented before anything meaningful can be done here
    //IDOMRange* domRange(0);
    //if (SUCCEEDED(m_webView->editingDelegate(&editingDelegate))) {
    //    editingDelegate->shouldDeleteDOMRange(m_webView, domRange, &result);
    //    editingDelegate->Release();
    //}
    //return !!result;
}

bool WebEditorClient::shouldInsertNode(Node* /*node*/, Range* /*replacingRange*/, EditorInsertAction /*givenAction*/)
{ 
    notImplemented(); 
    return true; 
}

bool WebEditorClient::shouldInsertText(const String& /*str*/, Range* /* replacingRange */, EditorInsertAction /*givenAction*/)
{     
    notImplemented(); 
    return true; 

    // FIXME: calling m_webView->editingDelegate() will cause an assertion failure so we don't want to enable this code until that's implemented. 
    //BOOL result = false;
    //IWebViewEditingDelegate* editingDelegate;
    //// FIXME: DOMRange needs to be implemented before anything meaningful can be done here
    //IDOMRange* domRange(0); // make a DOMRange from replacingRange
    //BString text(str);
    //if (SUCCEEDED(m_webView->editingDelegate(&editingDelegate))) {
    //    editingDelegate->shouldInsertText(m_webView, text, domRange, (WebViewInsertAction) givenAction, &result);
    //    editingDelegate->Release();
    //}
    //return !!result;
}

//bool WebEditorClient::shouldChangeSelectedRange(Range *currentRange, Range *toProposedRange, SelectionAffinity selectionAffinity, bool stillSelecting)
//{ notImplemented(); return false; }

bool WebEditorClient::shouldApplyStyle(CSSStyleDeclaration* /*style*/, Range* /*toElementsInDOMRange*/)
{ notImplemented(); return true; }

bool WebEditorClient::shouldMoveRangeAfterDelete(Range* /*range*/, Range* /*rangeToBeReplaced*/)
{ notImplemented(); return true; }

bool WebEditorClient::shouldChangeTypingStyle(CSSStyleDeclaration* /*currentStyle*/, CSSStyleDeclaration* /*toProposedStyle*/)
{ notImplemented(); return false; }

void WebEditorClient::webViewDidChangeTypingStyle(WebNotification* /*notification*/)
{  notImplemented(); }

void WebEditorClient::webViewDidChangeSelection(WebNotification* /*notification*/)
{  notImplemented(); }

bool WebEditorClient::shouldShowDeleteInterface(HTMLElement* /*element*/)
{ notImplemented(); return false; }

bool WebEditorClient::smartInsertDeleteEnabled(void)
{ 
    BOOL enabled = FALSE; 
    m_webView->smartInsertDeleteEnabled(&enabled);
    return !!enabled;
}

bool WebEditorClient::isSelectTrailingWhitespaceEnabled(void)
{
    BOOL enabled = FALSE;
    m_webView->isSelectTrailingWhitespaceEnabled(&enabled);
    return !!enabled;
}

bool WebEditorClient::shouldChangeSelectedRange(WebCore::Range*, WebCore::Range*, WebCore::EAffinity, bool)
{ notImplemented(); return true; }

void WebEditorClient::textFieldDidBeginEditing(Element* e)
{
    IWebFormDelegate* formDelegate;
    if (SUCCEEDED(m_webView->formDelegate(&formDelegate)) && formDelegate) {
        IDOMElement* domElement = DOMElement::createInstance(e);
        if (domElement) {
            IDOMHTMLInputElement* domInputElement;
            if (SUCCEEDED(domElement->QueryInterface(IID_IDOMHTMLInputElement, (void**)&domInputElement))) {
                formDelegate->textFieldDidBeginEditing(domInputElement, kit(e->document()->frame()));
                domInputElement->Release();
            }
            domElement->Release();
        }
        formDelegate->Release();
    }
}

void WebEditorClient::textFieldDidEndEditing(Element* e)
{
    IWebFormDelegate* formDelegate;
    if (SUCCEEDED(m_webView->formDelegate(&formDelegate)) && formDelegate) {
        IDOMElement* domElement = DOMElement::createInstance(e);
        if (domElement) {
            IDOMHTMLInputElement* domInputElement;
            if (SUCCEEDED(domElement->QueryInterface(IID_IDOMHTMLInputElement, (void**)&domInputElement))) {
                formDelegate->textFieldDidEndEditing(domInputElement, kit(e->document()->frame()));
                domInputElement->Release();
            }
            domElement->Release();
        }
        formDelegate->Release();
    }
}

void WebEditorClient::textDidChangeInTextField(Element* e)
{
    IWebFormDelegate* formDelegate;
    if (SUCCEEDED(m_webView->formDelegate(&formDelegate)) && formDelegate) {
        IDOMElement* domElement = DOMElement::createInstance(e);
        if (domElement) {
            IDOMHTMLInputElement* domInputElement;
            if (SUCCEEDED(domElement->QueryInterface(IID_IDOMHTMLInputElement, (void**)&domInputElement))) {
                formDelegate->textDidChangeInTextField(domInputElement, kit(e->document()->frame()));
                domInputElement->Release();
            }
            domElement->Release();
        }
        formDelegate->Release();
    }
}

bool WebEditorClient::doTextFieldCommandFromEvent(Element* e, KeyboardEvent* ke)
{
    BOOL result = FALSE;
    IWebFormDelegate* formDelegate;
    if (SUCCEEDED(m_webView->formDelegate(&formDelegate)) && formDelegate) {
        IDOMElement* domElement = DOMElement::createInstance(e);
        if (domElement) {
            IDOMHTMLInputElement* domInputElement;
            if (SUCCEEDED(domElement->QueryInterface(IID_IDOMHTMLInputElement, (void**)&domInputElement))) {
                String command = m_webView->interpretKeyEvent(ke);
                // We allow empty commands here because the app code actually depends on this being called for all key presses.
                // We may want to revisit this later because it doesn't really make sense to send an empty command.
                formDelegate->doPlatformCommand(domInputElement, BString(command), kit(e->document()->frame()), &result);
                domInputElement->Release();
            }
            domElement->Release();
        }
        formDelegate->Release();
    }
    return !!result;
}

void WebEditorClient::textWillBeDeletedInTextField(Element* e)
{
    // We're using the deleteBackward command for all deletion operations since the autofill code treats all deletions the same way.
    IWebFormDelegate* formDelegate;
    if (SUCCEEDED(m_webView->formDelegate(&formDelegate)) && formDelegate) {