webkitwebview.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

            g_cclosure_marshal_VOID__VOID,
            G_TYPE_NONE, 0);

    /**
     * WebKitWebView::cut-clipboard:
     * @web_view: the object which received the signal
     *
     * The #WebKitWebView::cut-clipboard signal is a keybinding signal which gets emitted to
     * cut the selection to the clipboard.
     *
     * The default bindings for this signal are Ctrl-x and Shift-Delete.
     */
    webkit_web_view_signals[CUT_CLIPBOARD] = g_signal_new("cut-clipboard",
            G_TYPE_FROM_CLASS(webViewClass),
            (GSignalFlags)(G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION),
            G_STRUCT_OFFSET(WebKitWebViewClass, cut_clipboard),
            NULL, NULL,
            g_cclosure_marshal_VOID__VOID,
            G_TYPE_NONE, 0);

    /**
     * WebKitWebView::copy-clipboard:
     * @web_view: the object which received the signal
     *
     * The #WebKitWebView::copy-clipboard signal is a keybinding signal which gets emitted to
     * copy the selection to the clipboard.
     *
     * The default bindings for this signal are Ctrl-c and Ctrl-Insert.
     */
    webkit_web_view_signals[COPY_CLIPBOARD] = g_signal_new("copy-clipboard",
            G_TYPE_FROM_CLASS(webViewClass),
            (GSignalFlags)(G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION),
            G_STRUCT_OFFSET(WebKitWebViewClass, copy_clipboard),
            NULL, NULL,
            g_cclosure_marshal_VOID__VOID,
            G_TYPE_NONE, 0);

    /**
     * WebKitWebView::paste-clipboard:
     * @web_view: the object which received the signal
     *
     * The #WebKitWebView::paste-clipboard signal is a keybinding signal which gets emitted to
     * paste the contents of the clipboard into the Web view.
     *
     * The default bindings for this signal are Ctrl-v and Shift-Insert.
     */
    webkit_web_view_signals[PASTE_CLIPBOARD] = g_signal_new("paste-clipboard",
            G_TYPE_FROM_CLASS(webViewClass),
            (GSignalFlags)(G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION),
            G_STRUCT_OFFSET(WebKitWebViewClass, paste_clipboard),
            NULL, NULL,
            g_cclosure_marshal_VOID__VOID,
            G_TYPE_NONE, 0);

    /*
     * implementations of virtual methods
     */
    webViewClass->create_web_view = webkit_web_view_real_create_web_view;
    webViewClass->web_view_ready = webkit_web_view_real_web_view_ready;
    webViewClass->navigation_requested = webkit_web_view_real_navigation_requested;
    webViewClass->window_object_cleared = webkit_web_view_real_window_object_cleared;
    webViewClass->choose_file = webkit_web_view_real_choose_file;
    webViewClass->script_alert = webkit_web_view_real_script_alert;
    webViewClass->script_confirm = webkit_web_view_real_script_confirm;
    webViewClass->script_prompt = webkit_web_view_real_script_prompt;
    webViewClass->console_message = webkit_web_view_real_console_message;
    webViewClass->select_all = webkit_web_view_real_select_all;
    webViewClass->cut_clipboard = webkit_web_view_real_cut_clipboard;
    webViewClass->copy_clipboard = webkit_web_view_real_copy_clipboard;
    webViewClass->paste_clipboard = webkit_web_view_real_paste_clipboard;

    GObjectClass* objectClass = G_OBJECT_CLASS(webViewClass);
    objectClass->dispose = webkit_web_view_dispose;
    objectClass->finalize = webkit_web_view_finalize;
    objectClass->get_property = webkit_web_view_get_property;
    objectClass->set_property = webkit_web_view_set_property;

    GtkWidgetClass* widgetClass = GTK_WIDGET_CLASS(webViewClass);
    widgetClass->realize = webkit_web_view_realize;
    widgetClass->expose_event = webkit_web_view_expose_event;
    widgetClass->key_press_event = webkit_web_view_key_press_event;
    widgetClass->key_release_event = webkit_web_view_key_release_event;
    widgetClass->button_press_event = webkit_web_view_button_press_event;
    widgetClass->button_release_event = webkit_web_view_button_release_event;
    widgetClass->motion_notify_event = webkit_web_view_motion_event;
    widgetClass->scroll_event = webkit_web_view_scroll_event;
    widgetClass->size_allocate = webkit_web_view_size_allocate;
    widgetClass->popup_menu = webkit_web_view_popup_menu_handler;
    widgetClass->focus_in_event = webkit_web_view_focus_in_event;
    widgetClass->focus_out_event = webkit_web_view_focus_out_event;
    widgetClass->get_accessible = webkit_web_view_get_accessible;

    GtkContainerClass* containerClass = GTK_CONTAINER_CLASS(webViewClass);
    containerClass->add = webkit_web_view_container_add;
    containerClass->remove = webkit_web_view_container_remove;
    containerClass->forall = webkit_web_view_container_forall;

    /*
     * make us scrollable (e.g. addable to a GtkScrolledWindow)
     */
    webViewClass->set_scroll_adjustments = webkit_web_view_set_scroll_adjustments;
    GTK_WIDGET_CLASS(webViewClass)->set_scroll_adjustments_signal = g_signal_new("set-scroll-adjustments",
            G_TYPE_FROM_CLASS(webViewClass),
            (GSignalFlags)(G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION),
            G_STRUCT_OFFSET(WebKitWebViewClass, set_scroll_adjustments),
            NULL, NULL,
            webkit_marshal_VOID__OBJECT_OBJECT,
            G_TYPE_NONE, 2,
            GTK_TYPE_ADJUSTMENT, GTK_TYPE_ADJUSTMENT);

    /*
     * Key bindings
     */

    binding_set = gtk_binding_set_by_class(webViewClass);

    gtk_binding_entry_add_signal(binding_set, GDK_a, GDK_CONTROL_MASK,
                                 "select_all", 0);

    /* Cut/copy/paste */

    gtk_binding_entry_add_signal(binding_set, GDK_x, GDK_CONTROL_MASK,
                                 "cut_clipboard", 0);
    gtk_binding_entry_add_signal(binding_set, GDK_c, GDK_CONTROL_MASK,
                                 "copy_clipboard", 0);
    gtk_binding_entry_add_signal(binding_set, GDK_v, GDK_CONTROL_MASK,
                                 "paste_clipboard", 0);

    gtk_binding_entry_add_signal(binding_set, GDK_Delete, GDK_SHIFT_MASK,
                                 "cut_clipboard", 0);
    gtk_binding_entry_add_signal(binding_set, GDK_Insert, GDK_CONTROL_MASK,
                                 "copy_clipboard", 0);
    gtk_binding_entry_add_signal(binding_set, GDK_Insert, GDK_SHIFT_MASK,
                                 "paste_clipboard", 0);

    /*
     * properties
     */

#if GTK_CHECK_VERSION(2,10,0)
    /**
    * WebKitWebView:copy-target-list:
    *
    * The list of targets this web view supports for clipboard copying.
    *
    * Since: 1.0.2
    */
    g_object_class_install_property(objectClass, PROP_COPY_TARGET_LIST,
                                    g_param_spec_boxed("copy-target-list",
                                                       "Copy target list",
                                                       "The list of targets this web view supports for clipboard copying",
                                                       GTK_TYPE_TARGET_LIST,
                                                       WEBKIT_PARAM_READABLE));

    /**
    * WebKitWebView:paste-target-list:
    *
    * The list of targets this web view supports for clipboard pasting.
    *
    * Since: 1.0.2
    */
    g_object_class_install_property(objectClass, PROP_PASTE_TARGET_LIST,
                                    g_param_spec_boxed("paste-target-list",
                                                       "Paste target list",
                                                       "The list of targets this web view supports for clipboard pasting",
                                                       GTK_TYPE_TARGET_LIST,
                                                       WEBKIT_PARAM_READABLE));
#endif

    g_object_class_install_property(objectClass, PROP_SETTINGS,
                                    g_param_spec_object("settings",
                                                        "Settings",
                                                        "An associated WebKitWebSettings instance",
                                                        WEBKIT_TYPE_WEB_SETTINGS,
                                                        WEBKIT_PARAM_READWRITE));

    /**
    * WebKitWebView:web-inspector:
    *
    * The associated WebKitWebInspector instance.
    *
    * Since: 1.0.3
    */
    g_object_class_install_property(objectClass, PROP_WEB_INSPECTOR,
                                    g_param_spec_object("web-inspector",
                                                        "Web Inspector",
                                                        "The associated WebKitWebInspector instance",
                                                        WEBKIT_TYPE_WEB_INSPECTOR,
                                                        WEBKIT_PARAM_READABLE));

    /**
    * WebKitWebView:window-features:
    *
    * An associated WebKitWebWindowFeatures instance.
    *
    * Since: 1.0.3
    */
    g_object_class_install_property(objectClass, PROP_WINDOW_FEATURES,
                                    g_param_spec_object("window-features",
                                                        "Window Features",
                                                        "An associated WebKitWebWindowFeatures instance",
                                                        WEBKIT_TYPE_WEB_WINDOW_FEATURES,
                                                        WEBKIT_PARAM_READWRITE));

    g_object_class_install_property(objectClass, PROP_EDITABLE,
                                    g_param_spec_boolean("editable",
                                                         "Editable",
                                                         "Whether content can be modified by the user",
                                                         FALSE,
                                                         WEBKIT_PARAM_READWRITE));

    g_object_class_install_property(objectClass, PROP_TRANSPARENT,
                                    g_param_spec_boolean("transparent",
                                                         "Transparent",
                                                         "Whether content has a transparent background",
                                                         FALSE,
                                                         WEBKIT_PARAM_READWRITE));

    /**
    * WebKitWebView:zoom-level:
    *
    * The level of zoom of the content.
    *
    * Since: 1.0.1
    */
    g_object_class_install_property(objectClass, PROP_ZOOM_LEVEL,
                                    g_param_spec_float("zoom-level",
                                                       "Zoom level",
                                                       "The level of zoom of the content",
                                                       G_MINFLOAT,
                                                       G_MAXFLOAT,
                                                       1.0f,
                                                       WEBKIT_PARAM_READWRITE));

    /**
    * WebKitWebView:full-content-zoom:
    *
    * Whether the full content is scaled when zooming.
    *
    * Since: 1.0.1
    */
    g_object_class_install_property(objectClass, PROP_FULL_CONTENT_ZOOM,
                                    g_param_spec_boolean("full-content-zoom",
                                                         "Full content zoom",
                                                         "Whether the full content is scaled when zooming",
                                                         FALSE,
                                                         WEBKIT_PARAM_READWRITE));

    /**
     * WebKitWebView:encoding:
     *
     * The default encoding of the web view.
     *
     * Since: 1.1.2
     */
    g_object_class_install_property(objectClass, PROP_ENCODING,
                                    g_param_spec_string("encoding",
                                                        "Encoding",
                                                        "The default encoding of the web view",
                                                        NULL,
                                                        WEBKIT_PARAM_READABLE));

    /**
     * WebKitWebView:custom-encoding:
     *
     * The custom encoding of the web view.
     *
     * Since: 1.1.2
     */
    g_object_class_install_property(objectClass, PROP_CUSTOM_ENCODING,
                                    g_param_spec_string("custom-encoding",
                                                        "Custom Encoding",
                                                        "The custom encoding of the web view",
                                                        NULL,
                                                        WEBKIT_PARAM_READWRITE));

    g_type_class_add_private(webViewClass, sizeof(WebKitWebViewPrivate));
}

static gdouble webViewGetDPI(WebKitWebView* webView)
{
    WebKitWebViewPrivate* priv = webView->priv;
    WebKitWebSettings* webSettings = priv->webSettings;
    gboolean enforce96DPI;
    g_object_get(webSettings, "enforce-96-dpi", &enforce96DPI, NULL);
    if (enforce96DPI)
        return 96.0;

    gdouble DPI = defaultDPI;
#if GTK_CHECK_VERSION(2,10,0)
    GdkScreen* screen = gtk_widget_has_screen(GTK_WIDGET(webView)) ? gtk_widget_get_screen(GTK_WIDGET(webView)) : gdk_screen_get_default();
    if (screen) {
        DPI = gdk_screen_get_resolution(screen);
        // gdk_screen_get_resolution() returns -1 when no DPI is set.
        if (DPI == -1)
            DPI = defaultDPI;
    }
#endif
    ASSERT(DPI > 0);
    return DPI;
}

static void webkit_web_view_screen_changed(WebKitWebView* webView, GdkScreen* previousScreen, gpointer userdata)
{
    WebKitWebViewPrivate* priv = webView->priv;
    WebKitWebSettings* webSettings = priv->webSettings;
    Settings* settings = core(webView)->settings();
    gdouble DPI = webViewGetDPI(webView);

    guint defaultFontSize, defaultMonospaceFontSize, minimumFontSize, minimumLogicalFontSize;

    g_object_get(webSettings,
                 "default-font-size", &defaultFontSize,
                 "default-monospace-font-size", &defaultMonospaceFontSize,
                 "minimum-font-size", &minimumFontSize,
                 "minimum-logical-font-size", &minimumLogicalFontSize,
                 NULL);

    settings->setDefaultFontSize(defaultFontSize / 72.0 * DPI);
    settings->setDefaultFixedFontSize(defaultMonospaceFontSize / 72.0 * DPI);
    settings->setMinimumFontSize(minimumFontSize / 72.0 * DPI);
    settings->setMinimumLogicalFontSize(minimumLogicalFontSize / 72.0 * DPI);
}

static void webkit_web_view_update_settings(WebKitWebView* webView)
{
    WebKitWebViewPrivate* priv = webView->priv;
    WebKitWebSettings* webSettings = priv->webSettings;
    Settings* settings = core(webView)->settings();

    gchar* defaultEncoding, *cursiveFontFamily, *defaultFontFamily, *fantasyFontFamily, *monospaceFontFamily, *sansSerifFontFamily, *serifFontFamily, *userStylesheetUri;
    gboolean autoLoadImages, autoShrinkImages, printBackgrounds, enableScripts, enablePlugins, enableDeveloperExtras, resizableTextAreas;

    g_object_get(webSettings,
                 "default-encoding", &defaultEncoding,
                 "cursive-font-family", &cursiveFontFamily,
                 "default-font-family", &defaultFontFamily,
                 "fantasy-font-family", &fantasyFontFamily,
                 "monospace-font-family", &monospaceFontFamily,
                 "sans-serif-font-family", &sansSerifFontFamily,
                 "serif-font-famil