editorclientgtk.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) 2007 Alp Toker <[e-mail]>
 *  Copyright (C) 2008 Nuanti Ltd.
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include "config.h"
#include "EditorClientGtk.h"

#include "CString.h"
#include "EditCommand.h"
#include "Editor.h"
#include "FocusController.h"
#include "Frame.h"
#include "KeyboardCodes.h"
#include "KeyboardEvent.h"
#include "NotImplemented.h"
#include "Page.h"
#include "PlatformKeyboardEvent.h"
#include "markup.h"
#include "webkitprivate.h"

using namespace WebCore;

namespace WebKit {

static void imContextCommitted(GtkIMContext* context, const gchar* str, EditorClient* client)
{
    Frame* targetFrame = core(client->m_webView)->focusController()->focusedOrMainFrame();

    if (!targetFrame || !targetFrame->editor()->canEdit())
        return;

    Editor* editor = targetFrame->editor();

    String commitString = String::fromUTF8(str);
    editor->confirmComposition(commitString);
}

static void imContextPreeditChanged(GtkIMContext* context, EditorClient* client)
{
    Frame* frame = core(client->m_webView)->focusController()->focusedOrMainFrame();
    Editor* editor = frame->editor();

    gchar* preedit = NULL;
    gint cursorPos = 0;
    // We ignore the provided PangoAttrList for now.
    gtk_im_context_get_preedit_string(context, &preedit, NULL, &cursorPos);
    String preeditString = String::fromUTF8(preedit);
    g_free(preedit);

    // setComposition() will replace the user selection if passed an empty
    // preedit. We don't want this to happen.
    if (preeditString.isEmpty() && !editor->hasComposition())
        return;

    Vector<CompositionUnderline> underlines;
    underlines.append(CompositionUnderline(0, preeditString.length(), Color(0, 0, 0), false));
    editor->setComposition(preeditString, underlines, cursorPos, 0);
}

void EditorClient::setInputMethodState(bool active)
{
    WebKitWebViewPrivate* priv = m_webView->priv;

    if (active)
        gtk_im_context_focus_in(priv->imContext);
    else
        gtk_im_context_focus_out(priv->imContext);

#ifdef MAEMO_CHANGES
    if (active)
        hildon_gtk_im_context_show(priv->imContext);
    else
        hildon_gtk_im_context_hide(priv->imContext);
#endif
}

bool EditorClient::shouldDeleteRange(Range*)
{
    notImplemented();
    return true;
}

bool EditorClient::shouldShowDeleteInterface(HTMLElement*)
{
    return false;
}

bool EditorClient::isContinuousSpellCheckingEnabled()
{
    notImplemented();
    return false;
}

bool EditorClient::isGrammarCheckingEnabled()
{
    notImplemented();
    return false;
}

int EditorClient::spellCheckerDocumentTag()
{
    notImplemented();
    return 0;
}

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

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

bool EditorClient::shouldInsertText(const String&, Range*, EditorInsertAction)
{
    notImplemented();
    return true;
}

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

bool EditorClient::shouldApplyStyle(WebCore::CSSStyleDeclaration*, WebCore::Range*)
{
    notImplemented();
    return true;
}

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

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

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

#if GTK_CHECK_VERSION(2,10,0)
static void clipboard_get_contents_cb(GtkClipboard* clipboard, GtkSelectionData* selection_data, guint info, gpointer data)
{
    WebKitWebView* webView = reinterpret_cast<WebKitWebView*>(data);
    Frame* frame = core(webView)->focusController()->focusedOrMainFrame();
    PassRefPtr<Range> selectedRange = frame->selection()->toNormalizedRange();

    if (static_cast<gint>(info) == WEBKIT_WEB_VIEW_TARGET_INFO_HTML) {
        String markup = createMarkup(selectedRange.get(), 0, AnnotateForInterchange);
        gtk_selection_data_set(selection_data, selection_data->target, 8,
                               reinterpret_cast<const guchar*>(markup.utf8().data()), markup.utf8().length());
    } else {
        String text = selectedRange->text();
        gtk_selection_data_set_text(selection_data, text.utf8().data(), text.utf8().length());
    }
}

static void clipboard_clear_contents_cb(GtkClipboard* clipboard, gpointer data)
{
    WebKitWebView* webView = reinterpret_cast<WebKitWebView*>(data);
    Frame* frame = core(webView)->focusController()->focusedOrMainFrame();

    // Collapse the selection without clearing it
    frame->selection()->setBase(frame->selection()->extent(), frame->selection()->affinity());
}
#endif

void EditorClient::respondToChangedSelection()
{
    WebKitWebViewPrivate* priv = m_webView->priv;
    Frame* targetFrame = core(m_webView)->focusController()->focusedOrMainFrame();

    if (!targetFrame)
        return;

    if (targetFrame->editor()->ignoreCompositionSelectionChange())
        return;

#if GTK_CHECK_VERSION(2,10,0)
    GtkClipboard* clipboard = gtk_widget_get_clipboard(GTK_WIDGET(m_webView), GDK_SELECTION_PRIMARY);
    if (targetFrame->selection()->isRange()) {
        GtkTargetList* targetList = webkit_web_view_get_copy_target_list(m_webView);
        gint targetCount;
        GtkTargetEntry* targets = gtk_target_table_new_from_list(targetList, &targetCount);
        gtk_clipboard_set_with_owner(clipboard, targets, targetCount,
                                     clipboard_get_contents_cb, clipboard_clear_contents_cb, G_OBJECT(m_webView));
        gtk_target_table_free(targets, targetCount);
    } else if (gtk_clipboard_get_owner(clipboard) == G_OBJECT(m_webView))
        gtk_clipboard_clear(clipboard);
#endif

    if (!targetFrame->editor()->hasComposition())
        return;

    unsigned start;
    unsigned end;
    if (!targetFrame->editor()->getCompositionSelection(start, end)) {
        // gtk_im_context_reset() clears the composition for us.
        gtk_im_context_reset(priv->imContext);
        targetFrame->editor()->confirmCompositionWithoutDisturbingSelection();
    }
}

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

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

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

bool EditorClient::isEditable()
{
    return webkit_web_view_get_editable(m_webView);
}

void EditorClient::registerCommandForUndo(WTF::PassRefPtr<WebCore::EditCommand>)
{
    notImplemented();
}

void EditorClient::registerCommandForRedo(WTF::PassRefPtr<WebCore::EditCommand>)
{
    notImplemented();
}

void EditorClient::clearUndoRedoOperations()
{
    notImplemented();
}

bool EditorClient::canUndo() const
{
    notImplemented();
    return false;
}

bool EditorClient::canRedo() const
{
    notImplemented();
    return false;
}

void EditorClient::undo()
{
    notImplemented();
}