root/trunk/WebCore/platform/gtk/gtk2drawing.c

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2002
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *  Brian Ryner <bryner@brianryner.com>  (Original Author)
 *  Pierre Chanial <p_ch@verizon.net>
 *  Michael Ventnor <m.ventnor@gmail.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

/*
 * This file contains painting functions for each of the gtk2 widgets.
 * Adapted from the gtkdrawing.c, and gtk+2.0 source.
 */

#include <gtk/gtk.h>
#include <gdk/gdkprivate.h>
#include <string.h>
#include "gtkdrawing.h"

#include <math.h>

#define XTHICKNESS(style) (style->xthickness)
#define YTHICKNESS(style) (style->ythickness)
#define WINDOW_IS_MAPPED(window) ((window) && GDK_IS_WINDOW(window) && gdk_window_is_visible(window))

static GtkWidget* gProtoWindow;
static GtkWidget* gButtonWidget;
static GtkWidget* gToggleButtonWidget;
static GtkWidget* gCheckboxWidget;
static GtkWidget* gRadiobuttonWidget;
static GtkWidget* gHorizScrollbarWidget;
static GtkWidget* gVertScrollbarWidget;
static GtkWidget* gSpinWidget;
static GtkWidget* gHScaleWidget;
static GtkWidget* gVScaleWidget;
static GtkWidget* gEntryWidget;
static GtkWidget* gArrowWidget;
static GtkWidget* gOptionMenuWidget;
static GtkWidget* gComboBoxEntryWidget;
static GtkWidget* gDropdownEntryWidget;
static GtkWidget* gDropdownButtonWidget;
static GtkWidget* gHandleBoxWidget;
static GtkWidget* gToolbarWidget;
static GtkWidget* gFrameWidget;
static GtkWidget* gStatusbarWidget;
static GtkWidget* gProgressWidget;
static GtkWidget* gTabWidget;
static GtkWidget* gTooltipWidget;
static GtkWidget* gMenuBarWidget;
static GtkWidget* gMenuBarItemWidget;
static GtkWidget* gMenuPopupWidget;
static GtkWidget* gMenuItemWidget;
static GtkWidget* gCheckMenuItemWidget;
static GtkWidget* gTreeViewWidget;
static GtkWidget* gTreeHeaderCellWidget;
static GtkWidget* gTreeHeaderSortArrowWidget;
static GtkWidget* gExpanderWidget;
static GtkWidget* gToolbarSeparatorWidget;
static GtkWidget* gMenuSeparatorWidget;
static GtkWidget* gHPanedWidget;
static GtkWidget* gVPanedWidget;

static GtkShadowType gMenuBarShadowType;
static GtkShadowType gToolbarShadowType;

static style_prop_t style_prop_func;
static gboolean have_menu_shadow_type;
static gboolean is_initialized;

gint
moz_gtk_enable_style_props(style_prop_t styleGetProp)
{
    style_prop_func = styleGetProp;
    return MOZ_GTK_SUCCESS;
}

static gint
ensure_window_widget()
{
    if (!gProtoWindow) {
        gProtoWindow = gtk_window_new(GTK_WINDOW_POPUP);
        gtk_widget_realize(gProtoWindow);
    }
    return MOZ_GTK_SUCCESS;
}

static gint
setup_widget_prototype(GtkWidget* widget)
{
    static GtkWidget* protoLayout;
    ensure_window_widget();
    if (!protoLayout) {
        protoLayout = gtk_fixed_new();
        gtk_container_add(GTK_CONTAINER(gProtoWindow), protoLayout);
    }

    gtk_container_add(GTK_CONTAINER(protoLayout), widget);
    gtk_widget_realize(widget);
    return MOZ_GTK_SUCCESS;
}

static gint
ensure_button_widget()
{
    if (!gButtonWidget) {
        gButtonWidget = gtk_button_new_with_label("M");
        setup_widget_prototype(gButtonWidget);
    }
    return MOZ_GTK_SUCCESS;
}

static gint
ensure_hpaned_widget()
{
    if (!gHPanedWidget) {
        gHPanedWidget = gtk_hpaned_new();
        setup_widget_prototype(gHPanedWidget);
    }
    return MOZ_GTK_SUCCESS;
}

static gint
ensure_vpaned_widget()
{
    if (!gVPanedWidget) {
        gVPanedWidget = gtk_vpaned_new();
        setup_widget_prototype(gVPanedWidget);
    }
    return MOZ_GTK_SUCCESS;
}

static gint
ensure_toggle_button_widget()
{
    if (!gToggleButtonWidget) {
        gToggleButtonWidget = gtk_toggle_button_new();
        setup_widget_prototype(gToggleButtonWidget);
        /* toggle button must be set active to get the right style on hover. */
        GTK_TOGGLE_BUTTON(gToggleButtonWidget)->active = TRUE;
  }
  return MOZ_GTK_SUCCESS;
}

static gint
ensure_checkbox_widget()
{
    if (!gCheckboxWidget) {
        gCheckboxWidget = gtk_check_button_new_with_label("M");
        setup_widget_prototype(gCheckboxWidget);
    }
    return MOZ_GTK_SUCCESS;
}

static gint
ensure_radiobutton_widget()
{
    if (!gRadiobuttonWidget) {
        gRadiobuttonWidget = gtk_radio_button_new_with_label(NULL, "M");
        setup_widget_prototype(gRadiobuttonWidget);
    }
    return MOZ_GTK_SUCCESS;
}

static gint
ensure_scrollbar_widget()
{
    if (!gVertScrollbarWidget) {
        gVertScrollbarWidget = gtk_vscrollbar_new(NULL);
        setup_widget_prototype(gVertScrollbarWidget);
    }
    if (!gHorizScrollbarWidget) {
        gHorizScrollbarWidget = gtk_hscrollbar_new(NULL);
        setup_widget_prototype(gHorizScrollbarWidget);
    }
    return MOZ_GTK_SUCCESS;
}

static gint
ensure_spin_widget()
{
  if (!gSpinWidget) {
    gSpinWidget = gtk_spin_button_new(NULL, 1, 0);
    setup_widget_prototype(gSpinWidget);
  }
  return MOZ_GTK_SUCCESS;
}

static gint
ensure_scale_widget()
{
  if (!gHScaleWidget) {
    gHScaleWidget = gtk_hscale_new(NULL);
    setup_widget_prototype(gHScaleWidget);
  }
  if (!gVScaleWidget) {
    gVScaleWidget = gtk_vscale_new(NULL);
    setup_widget_prototype(gVScaleWidget);
  }
  return MOZ_GTK_SUCCESS;
}

static gint
ensure_entry_widget()
{
    if (!gEntryWidget) {
        gEntryWidget = gtk_entry_new();
        setup_widget_prototype(gEntryWidget);
    }
    return MOZ_GTK_SUCCESS;
}

static gint
ensure_option_menu_widget()
{
    if (!gOptionMenuWidget) {
        gOptionMenuWidget = gtk_option_menu_new();
        setup_widget_prototype(gOptionMenuWidget);        
    }
    return MOZ_GTK_SUCCESS;
}

static gint
ensure_combo_box_entry_widget()
{
    if (!gComboBoxEntryWidget) {
        gComboBoxEntryWidget = gtk_combo_box_entry_new();
        setup_widget_prototype(gComboBoxEntryWidget);
    }
    return MOZ_GTK_SUCCESS;
}

static gint
ensure_dropdown_entry_widget()
{
    if (!gDropdownEntryWidget) {
        ensure_combo_box_entry_widget();

        gDropdownEntryWidget = GTK_BIN(gComboBoxEntryWidget)->child;
        gtk_widget_realize(gDropdownEntryWidget);
    }
    return MOZ_GTK_SUCCESS;
}

static void
moz_gtk_get_dropdown_button(GtkWidget *widget,
                            gpointer client_data)
{
    if (GTK_IS_TOGGLE_BUTTON(widget))
        gDropdownButtonWidget = widget;
}

static gint
ensure_arrow_widget()
{
    if (!gArrowWidget) {
        ensure_combo_box_entry_widget();

        gtk_container_forall(GTK_CONTAINER(gComboBoxEntryWidget),
                             moz_gtk_get_dropdown_button,
                             NULL);

        gArrowWidget = gtk_arrow_new(GTK_ARROW_DOWN, GTK_SHADOW_OUT);
        gtk_container_add(GTK_CONTAINER(GTK_BIN(gDropdownButtonWidget)->child),
                          gArrowWidget);
        gtk_widget_realize(gArrowWidget);
    }
    return MOZ_GTK_SUCCESS;
}

static gint
ensure_handlebox_widget()
{
    if (!gHandleBoxWidget) {
        gHandleBoxWidget = gtk_handle_box_new();
        setup_widget_prototype(gHandleBoxWidget);
    }
    return MOZ_GTK_SUCCESS;
}

static gint
ensure_toolbar_widget()
{
    if (!gToolbarWidget) {
        ensure_handlebox_widget();
        gToolbarWidget = gtk_toolbar_new();
        gtk_container_add(GTK_CONTAINER(gHandleBoxWidget), gToolbarWidget);
        gtk_widget_realize(gToolbarWidget);
        gtk_widget_style_get(gToolbarWidget, "shadow_type", &gToolbarShadowType,
                             NULL);
    }
    return MOZ_GTK_SUCCESS;
}

static gint
ensure_toolbar_separator_widget()
{
    if (!gToolbarSeparatorWidget) {
        ensure_toolbar_widget();
        gToolbarSeparatorWidget = GTK_WIDGET(gtk_separator_tool_item_new());
        setup_widget_prototype(gToolbarSeparatorWidget);
    }
    return MOZ_GTK_SUCCESS;
}

static gint
ensure_tooltip_widget()
{
    if (!gTooltipWidget) {
        gTooltipWidget = gtk_window_new(GTK_WINDOW_POPUP);
        gtk_widget_realize(gTooltipWidget);
    }
    return MOZ_GTK_SUCCESS;
}

static gint
ensure_tab_widget()
{
    if (!gTabWidget) {
        gTabWidget = gtk_notebook_new();
        setup_widget_prototype(gTabWidget);
    }
    return MOZ_GTK_SUCCESS;
}

static gint
ensure_progress_widget()
{
    if (!gProgressWidget) {
        gProgressWidget = gtk_progress_bar_new();
        setup_widget_prototype(gProgressWidget);
    }
    return MOZ_GTK_SUCCESS;
}

static gint
ensure_statusbar_widget()
{
    if (!gStatusbarWidget) {
      gStatusbarWidget = gtk_statusbar_new();
      setup_widget_prototype(gStatusbarWidget);
    }
    return MOZ_GTK_SUCCESS;
}

static gint
ensure_frame_widget()
{
    if (!gFrameWidget) {
        ensure_statusbar_widget();
        gFrameWidget = gtk_frame_new(NULL);
        gtk_container_add(GTK_CONTAINER(gStatusbarWidget), gFrameWidget);
        gtk_widget_realize(gFrameWidget);
    }
    return MOZ_GTK_SUCCESS;
}

static gint
ensure_menu_bar_widget()
{
    if (!gMenuBarWidget) {
        gMenuBarWidget = gtk_menu_bar_new();
        setup_widget_prototype(gMenuBarWidget);
       gtk_widget_style_get(gMenuBarWidget, "shadow_type", &gMenuBarShadowType,
                            NULL);
    }
    return MOZ_GTK_SUCCESS;
}

static gint
ensure_menu_bar_item_widget()
{
    if (!gMenuBarItemWidget) {
        ensure_menu_bar_widget();
        gMenuBarItemWidget = gtk_menu_item_new();
        gtk_menu_shell_append(GTK_MENU_SHELL(gMenuBarWidget),
                              gMenuBarItemWidget);
        gtk_widget_realize(gMenuBarItemWidget);
    }
    return MOZ_GTK_SUCCESS;
}

static gint
ensure_menu_popup_widget()
{
    if (!gMenuPopupWidget) {
        ensure_menu_bar_item_widget();
        gMenuPopupWidget = gtk_menu_new();
        gtk_menu_item_set_submenu(GTK_MENU_ITEM(gMenuBarItemWidget),
                                  gMenuPopupWidget);
        gtk_widget_realize(gMenuPopupWidget);
    }
    return MOZ_GTK_SUCCESS;
}

static gint
ensure_menu_item_widget()
{
    if (!gMenuItemWidget) {
        ensure_menu_popup_widget();
        gMenuItemWidget = gtk_menu_item_new_with_label("M");
        gtk_menu_shell_append(GTK_MENU_SHELL(gMenuPopupWidget),
                              gMenuItemWidget);
        gtk_widget_realize(gMenuItemWidget);
    }
    return MOZ_GTK_SUCCESS;
}

static gint
ensure_menu_separator_widget()
{
    if (!gMenuSeparatorWidget) {
        ensure_menu_popup_widget();
        gMenuSeparatorWidget = gtk_separator_menu_item_new();
        gtk_menu_shell_append(GTK_MENU_SHELL(gMenuPopupWidget),
                              gMenuSeparatorWidget);
        gtk_widget_realize(gMenuSeparatorWidget);
    }
    return MOZ_GTK_SUCCESS;
}

static gint
ensure_check_menu_item_widget()
{
    if (!gCheckMenuItemWidget) {
        ensure_menu_popup_widget();
        gCheckMenuItemWidget = gtk_check_menu_item_new_with_label("M");
        gtk_menu_shell_append(GTK_MENU_SHELL(gMenuPopupWidget),
                              gCheckMenuItemWidget);
        gtk_widget_realize(gCheckMenuItemWidget);
    }
    return MOZ_GTK_SUCCESS;
}

static gint
ensure_tree_view_widget()
{
    if (!gTreeViewWidget) {
        gTreeViewWidget = gtk_tree_view_new();
        setup_widget_prototype(gTreeViewWidget);
    }
    return MOZ_GTK_SUCCESS;
}

static gint
ensure_tree_header_cell_widget()
{
    if(!gTreeHeaderCellWidget) {
        GtkTreeViewColumn* treeViewColumn;
        ensure_tree_view_widget();

        treeViewColumn = gtk_tree_view_column_new();
        gtk_tree_view_column_set_title(treeViewColumn, "M");

        gtk_tree_view_append_column(GTK_TREE_VIEW(gTreeViewWidget), treeViewColumn);
        gTreeHeaderCellWidget = treeViewColumn->button;
        gtk_tree_view_column_set_sort_indicator(treeViewColumn, TRUE);
        gTreeHeaderSortArrowWidget = treeViewColumn->arrow;
    }
    return MOZ_GTK_SUCCESS;
}

static gint
ensure_expander_widget()
{
    if (!gExpanderWidget) {
        gExpanderWidget = gtk_expander_new("M");
        setup_widget_prototype(gExpanderWidget);
    }
    return MOZ_GTK_SUCCESS;
}

static GtkStateType
ConvertGtkState(GtkWidgetState* state)
{
    if (state->disabled)
        return GTK_STATE_INSENSITIVE;
    else if (state->depressed)
        return (state->inHover ? GTK_STATE_PRELIGHT : GTK_STATE_ACTIVE);
    else if (state->inHover)
        return (state->active ? GTK_STATE_ACTIVE : GTK_STATE_PRELIGHT);
    else
        return GTK_STATE_NORMAL;
}

static gint
TSOffsetStyleGCArray(GdkGC** gcs, gint xorigin, gint yorigin)
{
    int i;
    /* there are 5 gc's in each array, for each of the widget states */
    for (i = 0; i < 5; ++i)
        gdk_gc_set_ts_origin(gcs[i], xorigin, yorigin);
    return MOZ_GTK_SUCCESS;
}

static gint
TSOffsetStyleGCs(GtkStyle* style, gint xorigin, gint yorigin)
{
    TSOffsetStyleGCArray(style->fg_gc, xorigin, yorigin);
    TSOffsetStyleGCArray(style->bg_gc, xorigin, yorigin);
    TSOffsetStyleGCArray(style->light_gc, xorigin, yorigin);
    TSOffsetStyleGCArray(style->dark_gc, xorigin, yorigin);
    TSOffsetStyleGCArray(style->mid_gc, xorigin, yorigin);
    TSOffsetStyleGCArray(style->text_gc, xorigin, yorigin);
    TSOffsetStyleGCArray(style->base_gc, xorigin, yorigin);
    gdk_gc_set_ts_origin(style->black_gc, xorigin, yorigin);
    gdk_gc_set_ts_origin(style->white_gc, xorigin, yorigin);
    return MOZ_GTK_SUCCESS;
}

static gint
moz_gtk_button_paint(GdkDrawable* drawable, GdkRectangle* rect,
                     GdkRectangle* cliprect, GtkWidgetState* state,
                     GtkReliefStyle relief, GtkWidget* widget,
                     GtkTextDirection direction)
{
    GtkShadowType shadow_type;
    GtkStyle* style = widget->style;
    GtkStateType button_state = ConvertGtkState(state);
    gint x = rect->x, y=rect->y, width=rect->width, height=rect->height;

    gboolean interior_focus;
    gint focus_width, focus_pad;

    moz_gtk_widget_get_focus(widget, &interior_focus, &focus_width, &focus_pad);

    if (WINDOW_IS_MAPPED(drawable)) {
        gdk_window_set_back_pixmap(drawable, NULL, TRUE);
        gdk_window_clear_area(drawable, cliprect->x, cliprect->y,
                              cliprect->width, cliprect->height);
    }

    gtk_widget_set_state(widget, button_state);
    gtk_widget_set_direction(widget, direction);

    if (state->isDefault)
        GTK_WIDGET_SET_FLAGS(widget, GTK_HAS_DEFAULT);

    if (!interior_focus && state->focused) {
        x += focus_width + focus_pad;
        y += focus_width + focus_pad;
        width -= 2 * (focus_width + focus_pad);
        height -= 2 * (focus_width + focus_pad);
    }

    shadow_type = button_state == GTK_STATE_ACTIVE ||
                      state->depressed ? GTK_SHADOW_IN : GTK_SHADOW_OUT;
 
    if (state->isDefault && GTK_BUTTON(widget)->relief == GTK_RELIEF_NORMAL) {
        gtk_paint_box(style, drawable, button_state, shadow_type, cliprect,
                      widget, "buttondefault", x, y, width, height);                   
    }
 
    if (relief != GTK_RELIEF_NONE || state->depressed ||
           (button_state != GTK_STATE_NORMAL &&
            button_state != GTK_STATE_INSENSITIVE)) {
        TSOffsetStyleGCs(style, x, y);
        /* the following line can trigger an assertion (Crux theme)
           file ../../gdk/gdkwindow.c: line 1846 (gdk_window_clear_area):
           assertion `GDK_IS_WINDOW (window)' failed */
        gtk_paint_box(style, drawable, button_state, shadow_type, cliprect,
                      widget, "button", x, y, width, height);
    }

    if (state->focused) {
        if (interior_focus) {
            x += widget->style->xthickness + focus_pad;
            y += widget->style->ythickness + focus_pad;
            width -= 2 * (widget->style->xthickness + focus_pad);
            height -= 2 * (widget->style->ythickness + focus_pad);
        } else {
            x -= focus_width + focus_pad;
            y -= focus_width + focus_pad;
            width += 2 * (focus_width + focus_pad);
            height += 2 * (focus_width + focus_pad);
        }

        TSOffsetStyleGCs(style, x, y);
        gtk_paint_focus(style, drawable, button_state, cliprect,
                        widget, "button", x, y, width, height);
    }

    GTK_WIDGET_UNSET_FLAGS(widget, GTK_HAS_DEFAULT);
    return MOZ_GTK_SUCCESS;
}

gint