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fune/widget/gtk/WidgetStyleCache.cpp
Emilio Cobos Álvarez 288890e8bb Bug 1749645 - Remove unused native scrollbar drawing on gtk. r=stransky 
We decided to keep it when initially making scrollbars non-native, but I think
it's time for it to go, since it's pretty much untested.

Nobody has complained about the non-native scrollbars in chrome documents, and
the GTK scrollbar implementation is not suitable for content because it doesn't
support scrollbar-width among other things.

Differential Revision: https://phabricator.services.mozilla.com/D135670
2022-01-12 17:06:12 +00:00

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include <dlfcn.h>
#include <gtk/gtk.h>
#include "WidgetStyleCache.h"
#include "gtkdrawing.h"
#include "mozilla/Assertions.h"
#include "mozilla/PodOperations.h"
#include "mozilla/ScopeExit.h"
#include "nsDebug.h"
#include "nsPrintfCString.h"
#include "nsString.h"
#define STATE_FLAG_DIR_LTR (1U << 7)
#define STATE_FLAG_DIR_RTL (1U << 8)
static_assert(GTK_STATE_FLAG_DIR_LTR == STATE_FLAG_DIR_LTR &&
GTK_STATE_FLAG_DIR_RTL == STATE_FLAG_DIR_RTL,
"incorrect direction state flags");
enum class CSDStyle {
Unknown,
Solid,
Normal,
};
static bool gHeaderBarShouldDrawContainer = false;
static bool gMaximizedHeaderBarShouldDrawContainer = false;
static CSDStyle gCSDStyle = CSDStyle::Unknown;
static GtkWidget* sWidgetStorage[MOZ_GTK_WIDGET_NODE_COUNT];
static GtkStyleContext* sStyleStorage[MOZ_GTK_WIDGET_NODE_COUNT];
static GtkStyleContext* GetWidgetRootStyle(WidgetNodeType aNodeType);
static GtkStyleContext* GetCssNodeStyleInternal(WidgetNodeType aNodeType);
static GtkWidget* CreateWindowWidget() {
GtkWidget* widget = gtk_window_new(GTK_WINDOW_POPUP);
MOZ_RELEASE_ASSERT(widget, "We're missing GtkWindow widget!");
gtk_widget_set_name(widget, "MozillaGtkWidget");
return widget;
}
static GtkWidget* CreateWindowContainerWidget() {
GtkWidget* widget = gtk_fixed_new();
gtk_container_add(GTK_CONTAINER(GetWidget(MOZ_GTK_WINDOW)), widget);
return widget;
}
static void AddToWindowContainer(GtkWidget* widget) {
gtk_container_add(GTK_CONTAINER(GetWidget(MOZ_GTK_WINDOW_CONTAINER)), widget);
}
static GtkWidget* CreateScrollbarWidget(WidgetNodeType aAppearance,
GtkOrientation aOrientation) {
GtkWidget* widget = gtk_scrollbar_new(aOrientation, nullptr);
AddToWindowContainer(widget);
return widget;
}
static GtkWidget* CreateCheckboxWidget() {
GtkWidget* widget = gtk_check_button_new_with_label("M");
AddToWindowContainer(widget);
return widget;
}
static GtkWidget* CreateRadiobuttonWidget() {
GtkWidget* widget = gtk_radio_button_new_with_label(nullptr, "M");
AddToWindowContainer(widget);
return widget;
}
static GtkWidget* CreateMenuBarWidget() {
GtkWidget* widget = gtk_menu_bar_new();
AddToWindowContainer(widget);
return widget;
}
static GtkWidget* CreateMenuPopupWidget() {
GtkWidget* widget = gtk_menu_new();
GtkStyleContext* style = gtk_widget_get_style_context(widget);
gtk_style_context_add_class(style, GTK_STYLE_CLASS_POPUP);
gtk_menu_attach_to_widget(GTK_MENU(widget), GetWidget(MOZ_GTK_WINDOW),
nullptr);
return widget;
}
static GtkWidget* CreateProgressWidget() {
GtkWidget* widget = gtk_progress_bar_new();
AddToWindowContainer(widget);
return widget;
}
static GtkWidget* CreateTooltipWidget() {
MOZ_ASSERT(gtk_check_version(3, 20, 0) != nullptr,
"CreateTooltipWidget should be used for Gtk < 3.20 only.");
GtkWidget* widget = CreateWindowWidget();
GtkStyleContext* style = gtk_widget_get_style_context(widget);
gtk_style_context_add_class(style, GTK_STYLE_CLASS_TOOLTIP);
return widget;
}
static GtkWidget* CreateExpanderWidget() {
GtkWidget* widget = gtk_expander_new("M");
AddToWindowContainer(widget);
return widget;
}
static GtkWidget* CreateFrameWidget() {
GtkWidget* widget = gtk_frame_new(nullptr);
AddToWindowContainer(widget);
return widget;
}
static GtkWidget* CreateGripperWidget() {
GtkWidget* widget = gtk_handle_box_new();
AddToWindowContainer(widget);
return widget;
}
static GtkWidget* CreateToolbarWidget() {
GtkWidget* widget = gtk_toolbar_new();
gtk_container_add(GTK_CONTAINER(GetWidget(MOZ_GTK_GRIPPER)), widget);
return widget;
}
static GtkWidget* CreateToolbarSeparatorWidget() {
GtkWidget* widget = GTK_WIDGET(gtk_separator_tool_item_new());
AddToWindowContainer(widget);
return widget;
}
static GtkWidget* CreateButtonWidget() {
GtkWidget* widget = gtk_button_new_with_label("M");
AddToWindowContainer(widget);
return widget;
}
static GtkWidget* CreateToggleButtonWidget() {
GtkWidget* widget = gtk_toggle_button_new();
AddToWindowContainer(widget);
return widget;
}
static GtkWidget* CreateButtonArrowWidget() {
GtkWidget* widget = gtk_arrow_new(GTK_ARROW_DOWN, GTK_SHADOW_OUT);
gtk_container_add(GTK_CONTAINER(GetWidget(MOZ_GTK_TOGGLE_BUTTON)), widget);
gtk_widget_show(widget);
return widget;
}
static GtkWidget* CreateSpinWidget() {
GtkWidget* widget = gtk_spin_button_new(nullptr, 1, 0);
AddToWindowContainer(widget);
return widget;
}
static GtkWidget* CreateEntryWidget() {
GtkWidget* widget = gtk_entry_new();
AddToWindowContainer(widget);
return widget;
}
static GtkWidget* CreateComboBoxWidget() {
GtkWidget* widget = gtk_combo_box_new();
AddToWindowContainer(widget);
return widget;
}
typedef struct {
GType type;
GtkWidget** widget;
} GtkInnerWidgetInfo;
static void GetInnerWidget(GtkWidget* widget, gpointer client_data) {
auto info = static_cast<GtkInnerWidgetInfo*>(client_data);
if (G_TYPE_CHECK_INSTANCE_TYPE(widget, info->type)) {
*info->widget = widget;
}
}
static GtkWidget* CreateComboBoxButtonWidget() {
GtkWidget* comboBox = GetWidget(MOZ_GTK_COMBOBOX);
GtkWidget* comboBoxButton = nullptr;
/* Get its inner Button */
GtkInnerWidgetInfo info = {GTK_TYPE_TOGGLE_BUTTON, &comboBoxButton};
gtk_container_forall(GTK_CONTAINER(comboBox), GetInnerWidget, &info);
if (!comboBoxButton) {
/* Shouldn't be reached with current internal gtk implementation; we
* use a generic toggle button as last resort fallback to avoid
* crashing. */
comboBoxButton = GetWidget(MOZ_GTK_TOGGLE_BUTTON);
} else {
/* We need to have pointers to the inner widgets (button, separator, arrow)
* of the ComboBox to get the correct rendering from theme engines which
* special cases their look. Since the inner layout can change, we ask GTK
* to NULL our pointers when they are about to become invalid because the
* corresponding widgets don't exist anymore. It's the role of
* g_object_add_weak_pointer().
* Note that if we don't find the inner widgets (which shouldn't happen), we
* fallback to use generic "non-inner" widgets, and they don't need that
* kind of weak pointer since they are explicit children of gProtoLayout and
* as such GTK holds a strong reference to them. */
g_object_add_weak_pointer(
G_OBJECT(comboBoxButton),
reinterpret_cast<gpointer*>(sWidgetStorage) + MOZ_GTK_COMBOBOX_BUTTON);
}
return comboBoxButton;
}
static GtkWidget* CreateComboBoxArrowWidget() {
GtkWidget* comboBoxButton = GetWidget(MOZ_GTK_COMBOBOX_BUTTON);
GtkWidget* comboBoxArrow = nullptr;
/* Get the widgets inside the Button */
GtkWidget* buttonChild = gtk_bin_get_child(GTK_BIN(comboBoxButton));
if (GTK_IS_BOX(buttonChild)) {
/* appears-as-list = FALSE, cell-view = TRUE; the button
* contains an hbox. This hbox is there because the ComboBox
* needs to place a cell renderer, a separator, and an arrow in
* the button when appears-as-list is FALSE. */
GtkInnerWidgetInfo info = {GTK_TYPE_ARROW, &comboBoxArrow};
gtk_container_forall(GTK_CONTAINER(buttonChild), GetInnerWidget, &info);
} else if (GTK_IS_ARROW(buttonChild)) {
/* appears-as-list = TRUE, or cell-view = FALSE;
* the button only contains an arrow */
comboBoxArrow = buttonChild;
}
if (!comboBoxArrow) {
/* Shouldn't be reached with current internal gtk implementation;
* we gButtonArrowWidget as last resort fallback to avoid
* crashing. */
comboBoxArrow = GetWidget(MOZ_GTK_BUTTON_ARROW);
} else {
g_object_add_weak_pointer(
G_OBJECT(comboBoxArrow),
reinterpret_cast<gpointer*>(sWidgetStorage) + MOZ_GTK_COMBOBOX_ARROW);
}
return comboBoxArrow;
}
static GtkWidget* CreateComboBoxSeparatorWidget() {
// Ensure to search for separator only once as it can fail
// TODO - it won't initialize after ResetWidgetCache() call
static bool isMissingSeparator = false;
if (isMissingSeparator) return nullptr;
/* Get the widgets inside the Button */
GtkWidget* comboBoxSeparator = nullptr;
GtkWidget* buttonChild =
gtk_bin_get_child(GTK_BIN(GetWidget(MOZ_GTK_COMBOBOX_BUTTON)));
if (GTK_IS_BOX(buttonChild)) {
/* appears-as-list = FALSE, cell-view = TRUE; the button
* contains an hbox. This hbox is there because the ComboBox
* needs to place a cell renderer, a separator, and an arrow in
* the button when appears-as-list is FALSE. */
GtkInnerWidgetInfo info = {GTK_TYPE_SEPARATOR, &comboBoxSeparator};
gtk_container_forall(GTK_CONTAINER(buttonChild), GetInnerWidget, &info);
}
if (comboBoxSeparator) {
g_object_add_weak_pointer(G_OBJECT(comboBoxSeparator),
reinterpret_cast<gpointer*>(sWidgetStorage) +
MOZ_GTK_COMBOBOX_SEPARATOR);
} else {
/* comboBoxSeparator may be NULL
* when "appears-as-list" = TRUE or "cell-view" = FALSE;
* if there is no separator, then we just won't paint it. */
isMissingSeparator = true;
}
return comboBoxSeparator;
}
static GtkWidget* CreateComboBoxEntryWidget() {
GtkWidget* widget = gtk_combo_box_new_with_entry();
AddToWindowContainer(widget);
return widget;
}
static GtkWidget* CreateComboBoxEntryTextareaWidget() {
GtkWidget* comboBoxTextarea = nullptr;
/* Get its inner Entry and Button */
GtkInnerWidgetInfo info = {GTK_TYPE_ENTRY, &comboBoxTextarea};
gtk_container_forall(GTK_CONTAINER(GetWidget(MOZ_GTK_COMBOBOX_ENTRY)),
GetInnerWidget, &info);
if (!comboBoxTextarea) {
comboBoxTextarea = GetWidget(MOZ_GTK_ENTRY);
} else {
g_object_add_weak_pointer(
G_OBJECT(comboBoxTextarea),
reinterpret_cast<gpointer*>(sWidgetStorage) + MOZ_GTK_COMBOBOX_ENTRY);
}
return comboBoxTextarea;
}
static GtkWidget* CreateComboBoxEntryButtonWidget() {
GtkWidget* comboBoxButton = nullptr;
/* Get its inner Entry and Button */
GtkInnerWidgetInfo info = {GTK_TYPE_TOGGLE_BUTTON, &comboBoxButton};
gtk_container_forall(GTK_CONTAINER(GetWidget(MOZ_GTK_COMBOBOX_ENTRY)),
GetInnerWidget, &info);
if (!comboBoxButton) {
comboBoxButton = GetWidget(MOZ_GTK_TOGGLE_BUTTON);
} else {
g_object_add_weak_pointer(G_OBJECT(comboBoxButton),
reinterpret_cast<gpointer*>(sWidgetStorage) +
MOZ_GTK_COMBOBOX_ENTRY_BUTTON);
}
return comboBoxButton;
}
static GtkWidget* CreateComboBoxEntryArrowWidget() {
GtkWidget* comboBoxArrow = nullptr;
/* Get the Arrow inside the Button */
GtkWidget* buttonChild =
gtk_bin_get_child(GTK_BIN(GetWidget(MOZ_GTK_COMBOBOX_ENTRY_BUTTON)));
if (GTK_IS_BOX(buttonChild)) {
/* appears-as-list = FALSE, cell-view = TRUE; the button
* contains an hbox. This hbox is there because the ComboBox
* needs to place a cell renderer, a separator, and an arrow in
* the button when appears-as-list is FALSE. */
GtkInnerWidgetInfo info = {GTK_TYPE_ARROW, &comboBoxArrow};
gtk_container_forall(GTK_CONTAINER(buttonChild), GetInnerWidget, &info);
} else if (GTK_IS_ARROW(buttonChild)) {
/* appears-as-list = TRUE, or cell-view = FALSE;
* the button only contains an arrow */
comboBoxArrow = buttonChild;
}
if (!comboBoxArrow) {
/* Shouldn't be reached with current internal gtk implementation;
* we gButtonArrowWidget as last resort fallback to avoid
* crashing. */
comboBoxArrow = GetWidget(MOZ_GTK_BUTTON_ARROW);
} else {
g_object_add_weak_pointer(G_OBJECT(comboBoxArrow),
reinterpret_cast<gpointer*>(sWidgetStorage) +
MOZ_GTK_COMBOBOX_ENTRY_ARROW);
}
return comboBoxArrow;
}
static GtkWidget* CreateScrolledWindowWidget() {
GtkWidget* widget = gtk_scrolled_window_new(nullptr, nullptr);
AddToWindowContainer(widget);
return widget;
}
static GtkWidget* CreateMenuSeparatorWidget() {
GtkWidget* widget = gtk_separator_menu_item_new();
gtk_menu_shell_append(GTK_MENU_SHELL(GetWidget(MOZ_GTK_MENUPOPUP)), widget);
return widget;
}
static GtkWidget* CreateTreeViewWidget() {
GtkWidget* widget = gtk_tree_view_new();
AddToWindowContainer(widget);
return widget;
}
static GtkWidget* CreateTreeHeaderCellWidget() {
/*
* Some GTK engines paint the first and last cell
* of a TreeView header with a highlight.
* Since we do not know where our widget will be relative
* to the other buttons in the TreeView header, we must
* paint it as a button that is between two others,
* thus ensuring it is neither the first or last button
* in the header.
* GTK doesn't give us a way to do this explicitly,
* so we must paint with a button that is between two
* others.
*/
GtkTreeViewColumn* firstTreeViewColumn;
GtkTreeViewColumn* middleTreeViewColumn;
GtkTreeViewColumn* lastTreeViewColumn;
GtkWidget* treeView = GetWidget(MOZ_GTK_TREEVIEW);
/* Create and append our three columns */
firstTreeViewColumn = gtk_tree_view_column_new();
gtk_tree_view_column_set_title(firstTreeViewColumn, "M");
gtk_tree_view_append_column(GTK_TREE_VIEW(treeView), firstTreeViewColumn);
middleTreeViewColumn = gtk_tree_view_column_new();
gtk_tree_view_column_set_title(middleTreeViewColumn, "M");
gtk_tree_view_append_column(GTK_TREE_VIEW(treeView), middleTreeViewColumn);
lastTreeViewColumn = gtk_tree_view_column_new();
gtk_tree_view_column_set_title(lastTreeViewColumn, "M");
gtk_tree_view_append_column(GTK_TREE_VIEW(treeView), lastTreeViewColumn);
/* Use the middle column's header for our button */
return gtk_tree_view_column_get_button(middleTreeViewColumn);
}
static GtkWidget* CreateTreeHeaderSortArrowWidget() {
/* TODO, but it can't be NULL */
GtkWidget* widget = gtk_button_new();
AddToWindowContainer(widget);
return widget;
}
static GtkWidget* CreateHPanedWidget() {
GtkWidget* widget = gtk_paned_new(GTK_ORIENTATION_HORIZONTAL);
AddToWindowContainer(widget);
return widget;
}
static GtkWidget* CreateVPanedWidget() {
GtkWidget* widget = gtk_paned_new(GTK_ORIENTATION_VERTICAL);
AddToWindowContainer(widget);
return widget;
}
static GtkWidget* CreateScaleWidget(GtkOrientation aOrientation) {
GtkWidget* widget = gtk_scale_new(aOrientation, nullptr);
AddToWindowContainer(widget);
return widget;
}
static GtkWidget* CreateNotebookWidget() {
GtkWidget* widget = gtk_notebook_new();
AddToWindowContainer(widget);
return widget;
}
static bool HasBackground(GtkStyleContext* aStyle) {
GdkRGBA gdkColor;
gtk_style_context_get_background_color(aStyle, GTK_STATE_FLAG_NORMAL,
&gdkColor);
if (gdkColor.alpha != 0.0) {
return true;
}
GValue value = G_VALUE_INIT;
gtk_style_context_get_property(aStyle, "background-image",
GTK_STATE_FLAG_NORMAL, &value);
auto cleanup = mozilla::MakeScopeExit([&] { g_value_unset(&value); });
return g_value_get_boxed(&value);
}
static void CreateHeaderBarWidget(WidgetNodeType aAppearance) {
GtkWidget* window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
GtkStyleContext* windowStyle = gtk_widget_get_style_context(window);
// Headerbar has to be placed to window with csd or solid-csd style
// to properly draw the decorated.
gtk_style_context_add_class(windowStyle,
IsSolidCSDStyleUsed() ? "solid-csd" : "csd");
GtkWidget* fixed = gtk_fixed_new();
GtkStyleContext* fixedStyle = gtk_widget_get_style_context(fixed);
gtk_style_context_add_class(fixedStyle, "titlebar");
GtkWidget* headerBar = gtk_header_bar_new();
// Emulate what create_titlebar() at gtkwindow.c does.
GtkStyleContext* headerBarStyle = gtk_widget_get_style_context(headerBar);
gtk_style_context_add_class(headerBarStyle, "titlebar");
// TODO: Define default-decoration titlebar style as workaround
// to ensure the titlebar buttons does not overflow outside.
// Recently the titlebar size is calculated as
// tab size + titlebar border/padding (default-decoration has 6px padding
// at default Adwaita theme).
// We need to fix titlebar size calculation to also include
// titlebar button sizes. (Bug 1419442)
gtk_style_context_add_class(headerBarStyle, "default-decoration");
sWidgetStorage[aAppearance] = headerBar;
if (aAppearance == MOZ_GTK_HEADER_BAR_MAXIMIZED) {
MOZ_ASSERT(!sWidgetStorage[MOZ_GTK_HEADERBAR_WINDOW_MAXIMIZED],
"Window widget is already created!");
MOZ_ASSERT(!sWidgetStorage[MOZ_GTK_HEADERBAR_FIXED_MAXIMIZED],
"Fixed widget is already created!");
gtk_style_context_add_class(windowStyle, "maximized");
sWidgetStorage[MOZ_GTK_HEADERBAR_WINDOW_MAXIMIZED] = window;
sWidgetStorage[MOZ_GTK_HEADERBAR_FIXED_MAXIMIZED] = fixed;
} else {
MOZ_ASSERT(!sWidgetStorage[MOZ_GTK_HEADERBAR_WINDOW],
"Window widget is already created!");
MOZ_ASSERT(!sWidgetStorage[MOZ_GTK_HEADERBAR_FIXED],
"Fixed widget is already created!");
sWidgetStorage[MOZ_GTK_HEADERBAR_WINDOW] = window;
sWidgetStorage[MOZ_GTK_HEADERBAR_FIXED] = fixed;
}
gtk_container_add(GTK_CONTAINER(window), fixed);
gtk_container_add(GTK_CONTAINER(fixed), headerBar);
gtk_style_context_invalidate(headerBarStyle);
gtk_style_context_invalidate(fixedStyle);
// Some themes like Elementary's style the container of the headerbar rather
// than the header bar itself.
bool& shouldDrawContainer = aAppearance == MOZ_GTK_HEADER_BAR
? gHeaderBarShouldDrawContainer
: gMaximizedHeaderBarShouldDrawContainer;
shouldDrawContainer = [&] {
const bool headerBarHasBackground = HasBackground(headerBarStyle);
if (headerBarHasBackground && GetBorderRadius(headerBarStyle)) {
return false;
}
if (HasBackground(fixedStyle) &&
(GetBorderRadius(fixedStyle) || !headerBarHasBackground)) {
return true;
}
return false;
}();
}
#define ICON_SCALE_VARIANTS 2
static void LoadWidgetIconPixbuf(GtkWidget* aWidgetIcon) {
GtkStyleContext* style = gtk_widget_get_style_context(aWidgetIcon);
const gchar* iconName;
GtkIconSize gtkIconSize;
gtk_image_get_icon_name(GTK_IMAGE(aWidgetIcon), &iconName, &gtkIconSize);
gint iconWidth, iconHeight;
gtk_icon_size_lookup(gtkIconSize, &iconWidth, &iconHeight);
/* Those are available since Gtk+ 3.10 as well as GtkHeaderBar */
for (int scale = 1; scale < ICON_SCALE_VARIANTS + 1; scale++) {
GtkIconInfo* gtkIconInfo = gtk_icon_theme_lookup_icon_for_scale(
gtk_icon_theme_get_default(), iconName, iconWidth, scale,
(GtkIconLookupFlags)0);
if (!gtkIconInfo) {
// We miss the icon, nothing to do here.
return;
}
gboolean unused;
GdkPixbuf* iconPixbuf = gtk_icon_info_load_symbolic_for_context(
gtkIconInfo, style, &unused, nullptr);
g_object_unref(G_OBJECT(gtkIconInfo));
cairo_surface_t* iconSurface =
gdk_cairo_surface_create_from_pixbuf(iconPixbuf, scale, nullptr);
g_object_unref(iconPixbuf);
nsPrintfCString surfaceName("MozillaIconSurface%d", scale);
g_object_set_data_full(G_OBJECT(aWidgetIcon), surfaceName.get(),
iconSurface, (GDestroyNotify)cairo_surface_destroy);
}
}
cairo_surface_t* GetWidgetIconSurface(GtkWidget* aWidgetIcon, int aScale) {
if (aScale > ICON_SCALE_VARIANTS) {
aScale = ICON_SCALE_VARIANTS;
}
nsPrintfCString surfaceName("MozillaIconSurface%d", aScale);
return (cairo_surface_t*)g_object_get_data(G_OBJECT(aWidgetIcon),
surfaceName.get());
}
static void CreateHeaderBarButton(GtkWidget* aParentWidget,
WidgetNodeType aAppearance) {
GtkWidget* widget = gtk_button_new();
// We have to add button to widget hierarchy now to pick
// right icon style at LoadWidgetIconPixbuf().
if (GTK_IS_BOX(aParentWidget)) {
gtk_box_pack_start(GTK_BOX(aParentWidget), widget, FALSE, FALSE, 0);
} else {
gtk_container_add(GTK_CONTAINER(aParentWidget), widget);
}
// We bypass GetWidget() here because we create all titlebar
// buttons at once when a first one is requested.
NS_ASSERTION(!sWidgetStorage[aAppearance],
"Titlebar button is already created!");
sWidgetStorage[aAppearance] = widget;
// We need to show the button widget now as GtkBox does not
// place invisible widgets and we'll miss first-child/last-child
// css selectors at the buttons otherwise.
gtk_widget_show(widget);
GtkStyleContext* style = gtk_widget_get_style_context(widget);
gtk_style_context_add_class(style, "titlebutton");
GtkWidget* image = nullptr;
switch (aAppearance) {
case MOZ_GTK_HEADER_BAR_BUTTON_CLOSE:
gtk_style_context_add_class(style, "close");
image = gtk_image_new_from_icon_name("window-close-symbolic",
GTK_ICON_SIZE_MENU);
break;
case MOZ_GTK_HEADER_BAR_BUTTON_MINIMIZE:
gtk_style_context_add_class(style, "minimize");
image = gtk_image_new_from_icon_name("window-minimize-symbolic",
GTK_ICON_SIZE_MENU);
break;
case MOZ_GTK_HEADER_BAR_BUTTON_MAXIMIZE:
gtk_style_context_add_class(style, "maximize");
image = gtk_image_new_from_icon_name("window-maximize-symbolic",
GTK_ICON_SIZE_MENU);
break;
case MOZ_GTK_HEADER_BAR_BUTTON_MAXIMIZE_RESTORE:
gtk_style_context_add_class(style, "maximize");
image = gtk_image_new_from_icon_name("window-restore-symbolic",
GTK_ICON_SIZE_MENU);
break;
default:
break;
}
gtk_widget_set_valign(widget, GTK_ALIGN_CENTER);
g_object_set(image, "use-fallback", TRUE, NULL);
gtk_container_add(GTK_CONTAINER(widget), image);
// We bypass GetWidget() here by explicit sWidgetStorage[] update so
// invalidate the style as well as GetWidget() does.
style = gtk_widget_get_style_context(image);
gtk_style_context_invalidate(style);
LoadWidgetIconPixbuf(image);
}
static bool IsToolbarButtonEnabled(ButtonLayout* aButtonLayout,
size_t aButtonNums,
WidgetNodeType aAppearance) {
for (size_t i = 0; i < aButtonNums; i++) {
if (aButtonLayout[i].mType == aAppearance) {
return true;
}
}
return false;
}
bool IsSolidCSDStyleUsed() {
if (gCSDStyle == CSDStyle::Unknown) {
bool solid;
{
GtkWidget* window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_window_set_titlebar(GTK_WINDOW(window), gtk_header_bar_new());
gtk_widget_realize(window);
GtkStyleContext* windowStyle = gtk_widget_get_style_context(window);
solid = gtk_style_context_has_class(windowStyle, "solid-csd");
gtk_widget_destroy(window);
}
gCSDStyle = solid ? CSDStyle::Solid : CSDStyle::Normal;
}
return gCSDStyle == CSDStyle::Solid;
}
static void CreateHeaderBarButtons() {
GtkWidget* headerBar = sWidgetStorage[MOZ_GTK_HEADER_BAR];
MOZ_ASSERT(headerBar != nullptr, "We're missing header bar widget!");
gint buttonSpacing = 6;
g_object_get(headerBar, "spacing", &buttonSpacing, nullptr);
GtkWidget* buttonBox = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, buttonSpacing);
gtk_container_add(GTK_CONTAINER(GetWidget(MOZ_GTK_HEADER_BAR)), buttonBox);
// We support only LTR headerbar layout for now.
gtk_style_context_add_class(gtk_widget_get_style_context(buttonBox),
GTK_STYLE_CLASS_LEFT);
ButtonLayout buttonLayout[TOOLBAR_BUTTONS];
size_t activeButtons =
GetGtkHeaderBarButtonLayout(mozilla::Span(buttonLayout), nullptr);
if (IsToolbarButtonEnabled(buttonLayout, activeButtons,
MOZ_GTK_HEADER_BAR_BUTTON_MINIMIZE)) {
CreateHeaderBarButton(buttonBox, MOZ_GTK_HEADER_BAR_BUTTON_MINIMIZE);
}
if (IsToolbarButtonEnabled(buttonLayout, activeButtons,
MOZ_GTK_HEADER_BAR_BUTTON_MAXIMIZE)) {
CreateHeaderBarButton(buttonBox, MOZ_GTK_HEADER_BAR_BUTTON_MAXIMIZE);
// We don't pack "restore" headerbar button to box as it's an icon
// placeholder. Pack it only to header bar to get correct style.
CreateHeaderBarButton(GetWidget(MOZ_GTK_HEADER_BAR),
MOZ_GTK_HEADER_BAR_BUTTON_MAXIMIZE_RESTORE);
}
if (IsToolbarButtonEnabled(buttonLayout, activeButtons,
MOZ_GTK_HEADER_BAR_BUTTON_CLOSE)) {
CreateHeaderBarButton(buttonBox, MOZ_GTK_HEADER_BAR_BUTTON_CLOSE);
}
}
static void CreateHeaderBar() {
CreateHeaderBarWidget(MOZ_GTK_HEADER_BAR);
CreateHeaderBarWidget(MOZ_GTK_HEADER_BAR_MAXIMIZED);
CreateHeaderBarButtons();
}
static GtkWidget* CreateWidget(WidgetNodeType aAppearance) {
switch (aAppearance) {
case MOZ_GTK_WINDOW:
return CreateWindowWidget();
case MOZ_GTK_WINDOW_CONTAINER:
return CreateWindowContainerWidget();
case MOZ_GTK_CHECKBUTTON_CONTAINER:
return CreateCheckboxWidget();
case MOZ_GTK_PROGRESSBAR:
return CreateProgressWidget();
case MOZ_GTK_RADIOBUTTON_CONTAINER:
return CreateRadiobuttonWidget();
case MOZ_GTK_SCROLLBAR_VERTICAL:
return CreateScrollbarWidget(aAppearance, GTK_ORIENTATION_VERTICAL);
case MOZ_GTK_MENUBAR:
return CreateMenuBarWidget();
case MOZ_GTK_MENUPOPUP:
return CreateMenuPopupWidget();
case MOZ_GTK_MENUSEPARATOR:
return CreateMenuSeparatorWidget();
case MOZ_GTK_EXPANDER:
return CreateExpanderWidget();
case MOZ_GTK_FRAME:
return CreateFrameWidget();
case MOZ_GTK_GRIPPER:
return CreateGripperWidget();
case MOZ_GTK_TOOLBAR:
return CreateToolbarWidget();
case MOZ_GTK_TOOLBAR_SEPARATOR:
return CreateToolbarSeparatorWidget();
case MOZ_GTK_SPINBUTTON:
return CreateSpinWidget();
case MOZ_GTK_BUTTON:
return CreateButtonWidget();
case MOZ_GTK_TOGGLE_BUTTON:
return CreateToggleButtonWidget();
case MOZ_GTK_BUTTON_ARROW:
return CreateButtonArrowWidget();
case MOZ_GTK_ENTRY:
case MOZ_GTK_DROPDOWN_ENTRY:
return CreateEntryWidget();
case MOZ_GTK_SCROLLED_WINDOW:
return CreateScrolledWindowWidget();
case MOZ_GTK_TREEVIEW:
return CreateTreeViewWidget();
case MOZ_GTK_TREE_HEADER_CELL:
return CreateTreeHeaderCellWidget();
case MOZ_GTK_TREE_HEADER_SORTARROW:
return CreateTreeHeaderSortArrowWidget();
case MOZ_GTK_SPLITTER_HORIZONTAL:
return CreateHPanedWidget();
case MOZ_GTK_SPLITTER_VERTICAL:
return CreateVPanedWidget();
case MOZ_GTK_SCALE_HORIZONTAL:
return CreateScaleWidget(GTK_ORIENTATION_HORIZONTAL);
case MOZ_GTK_SCALE_VERTICAL:
return CreateScaleWidget(GTK_ORIENTATION_VERTICAL);
case MOZ_GTK_NOTEBOOK:
return CreateNotebookWidget();
case MOZ_GTK_COMBOBOX:
return CreateComboBoxWidget();
case MOZ_GTK_COMBOBOX_BUTTON:
return CreateComboBoxButtonWidget();
case MOZ_GTK_COMBOBOX_ARROW:
return CreateComboBoxArrowWidget();
case MOZ_GTK_COMBOBOX_SEPARATOR:
return CreateComboBoxSeparatorWidget();
case MOZ_GTK_COMBOBOX_ENTRY:
return CreateComboBoxEntryWidget();
case MOZ_GTK_COMBOBOX_ENTRY_TEXTAREA:
return CreateComboBoxEntryTextareaWidget();
case MOZ_GTK_COMBOBOX_ENTRY_BUTTON:
return CreateComboBoxEntryButtonWidget();
case MOZ_GTK_COMBOBOX_ENTRY_ARROW:
return CreateComboBoxEntryArrowWidget();
case MOZ_GTK_HEADERBAR_WINDOW:
case MOZ_GTK_HEADERBAR_WINDOW_MAXIMIZED:
case MOZ_GTK_HEADERBAR_FIXED:
case MOZ_GTK_HEADERBAR_FIXED_MAXIMIZED:
case MOZ_GTK_HEADER_BAR:
case MOZ_GTK_HEADER_BAR_MAXIMIZED:
case MOZ_GTK_HEADER_BAR_BUTTON_CLOSE:
case MOZ_GTK_HEADER_BAR_BUTTON_MINIMIZE:
case MOZ_GTK_HEADER_BAR_BUTTON_MAXIMIZE:
case MOZ_GTK_HEADER_BAR_BUTTON_MAXIMIZE_RESTORE:
/* Create header bar widgets once and fill with child elements as we need
the header bar fully configured to get a correct style */
CreateHeaderBar();
return sWidgetStorage[aAppearance];
default:
/* Not implemented */
return nullptr;
}
}
GtkWidget* GetWidget(WidgetNodeType aAppearance) {
GtkWidget* widget = sWidgetStorage[aAppearance];
if (!widget) {
widget = CreateWidget(aAppearance);
// Some widgets (MOZ_GTK_COMBOBOX_SEPARATOR for instance) may not be
// available or implemented.
if (!widget) {
return nullptr;
}
// In GTK versions prior to 3.18, automatic invalidation of style contexts
// for widgets was delayed until the next resize event. Gecko however,
// typically uses the style context before the resize event runs and so an
// explicit invalidation may be required. This is necessary if a style
// property was retrieved before all changes were made to the style
// context. One such situation is where gtk_button_construct_child()
// retrieves the style property "image-spacing" during construction of the
// GtkButton, before its parent is set to provide inheritance of ancestor
// properties. More recent GTK versions do not need this, but do not
// re-resolve until required and so invalidation does not trigger
// unnecessary resolution in general.
GtkStyleContext* style = gtk_widget_get_style_context(widget);
gtk_style_context_invalidate(style);
sWidgetStorage[aAppearance] = widget;
}
return widget;
}
static void AddStyleClassesFromStyle(GtkStyleContext* aDest,
GtkStyleContext* aSrc) {
GList* classes = gtk_style_context_list_classes(aSrc);
for (GList* link = classes; link; link = link->next) {
gtk_style_context_add_class(aDest, static_cast<gchar*>(link->data));
}
g_list_free(classes);
}
GtkStyleContext* CreateStyleForWidget(GtkWidget* aWidget,
GtkStyleContext* aParentStyle) {
static auto sGtkWidgetClassGetCSSName =
reinterpret_cast<const char* (*)(GtkWidgetClass*)>(
dlsym(RTLD_DEFAULT, "gtk_widget_class_get_css_name"));
GtkWidgetClass* widgetClass = GTK_WIDGET_GET_CLASS(aWidget);
const gchar* name = sGtkWidgetClassGetCSSName
? sGtkWidgetClassGetCSSName(widgetClass)
: nullptr;
GtkStyleContext* context =
CreateCSSNode(name, aParentStyle, G_TYPE_FROM_CLASS(widgetClass));
// Classes are stored on the style context instead of the path so that any
// future gtk_style_context_save() will inherit classes on the head CSS
// node, in the same way as happens when called on a style context owned by
// a widget.
//
// Classes can be stored on a GtkCssNodeDeclaration and/or the path.
// gtk_style_context_save() reuses the GtkCssNodeDeclaration, and appends a
// new object to the path, without copying the classes from the old path
// head. The new head picks up classes from the GtkCssNodeDeclaration, but
// not the path. GtkWidgets store their classes on the
// GtkCssNodeDeclaration, so make sure to add classes there.
//
// Picking up classes from the style context also means that
// https://bugzilla.gnome.org/show_bug.cgi?id=767312, which can stop
// gtk_widget_path_append_for_widget() from finding classes in GTK 3.20,
// is not a problem.
GtkStyleContext* widgetStyle = gtk_widget_get_style_context(aWidget);
AddStyleClassesFromStyle(context, widgetStyle);
// Release any floating reference on aWidget.
g_object_ref_sink(aWidget);
g_object_unref(aWidget);
return context;
}
static GtkStyleContext* CreateStyleForWidget(GtkWidget* aWidget,
WidgetNodeType aParentType) {
return CreateStyleForWidget(aWidget, GetWidgetRootStyle(aParentType));
}
GtkStyleContext* CreateCSSNode(const char* aName, GtkStyleContext* aParentStyle,
GType aType) {
static auto sGtkWidgetPathIterSetObjectName =
reinterpret_cast<void (*)(GtkWidgetPath*, gint, const char*)>(
dlsym(RTLD_DEFAULT, "gtk_widget_path_iter_set_object_name"));
GtkWidgetPath* path;
if (aParentStyle) {
path = gtk_widget_path_copy(gtk_style_context_get_path(aParentStyle));
// Copy classes from the parent style context to its corresponding node in
// the path, because GTK will only match against ancestor classes if they
// are on the path.
GList* classes = gtk_style_context_list_classes(aParentStyle);
for (GList* link = classes; link; link = link->next) {
gtk_widget_path_iter_add_class(path, -1, static_cast<gchar*>(link->data));
}
g_list_free(classes);
} else {
path = gtk_widget_path_new();
}
gtk_widget_path_append_type(path, aType);
if (sGtkWidgetPathIterSetObjectName) {
(*sGtkWidgetPathIterSetObjectName)(path, -1, aName);
}
GtkStyleContext* context = gtk_style_context_new();
gtk_style_context_set_path(context, path);
gtk_style_context_set_parent(context, aParentStyle);
gtk_widget_path_unref(path);
// In GTK 3.4, gtk_render_* functions use |theming_engine| on the style
// context without ensuring any style resolution sets it appropriately
// in style_data_lookup(). e.g.
// https://git.gnome.org/browse/gtk+/tree/gtk/gtkstylecontext.c?h=3.4.4#n3847
//
// That can result in incorrect drawing on first draw. To work around this,
// force a style look-up to set |theming_engine|. It is sufficient to do
// this only on context creation, instead of after every modification to the
// context, because themes typically (Ambiance and oxygen-gtk, at least) set
// the "engine" property with the '*' selector.
if (GTK_MAJOR_VERSION == 3 && gtk_get_minor_version() < 6) {
GdkRGBA unused;
gtk_style_context_get_color(context, GTK_STATE_FLAG_NORMAL, &unused);
}
return context;
}
// Return a style context matching that of the root CSS node of a widget.
// This is used by all GTK versions.
static GtkStyleContext* GetWidgetRootStyle(WidgetNodeType aNodeType) {
GtkStyleContext* style = sStyleStorage[aNodeType];
if (style) return style;
switch (aNodeType) {
case MOZ_GTK_MENUBARITEM:
style = CreateStyleForWidget(gtk_menu_item_new(), MOZ_GTK_MENUBAR);
break;
case MOZ_GTK_MENUITEM:
style = CreateStyleForWidget(gtk_menu_item_new(), MOZ_GTK_MENUPOPUP);
break;
case MOZ_GTK_CHECKMENUITEM:
style =
CreateStyleForWidget(gtk_check_menu_item_new(), MOZ_GTK_MENUPOPUP);
break;
case MOZ_GTK_RADIOMENUITEM:
style = CreateStyleForWidget(gtk_radio_menu_item_new(nullptr),
MOZ_GTK_MENUPOPUP);
break;
case MOZ_GTK_TEXT_VIEW:
style =
CreateStyleForWidget(gtk_text_view_new(), MOZ_GTK_SCROLLED_WINDOW);
break;
case MOZ_GTK_TOOLTIP:
if (gtk_check_version(3, 20, 0) != nullptr) {
// The tooltip style class is added first in CreateTooltipWidget()
// and transfered to style in CreateStyleForWidget().
GtkWidget* tooltipWindow = CreateTooltipWidget();
style = CreateStyleForWidget(tooltipWindow, nullptr);
gtk_widget_destroy(tooltipWindow); // Release GtkWindow self-reference.
} else {
// We create this from the path because GtkTooltipWindow is not public.
style = CreateCSSNode("tooltip", nullptr, GTK_TYPE_TOOLTIP);
gtk_style_context_add_class(style, GTK_STYLE_CLASS_BACKGROUND);
}
break;
case MOZ_GTK_TOOLTIP_BOX:
style = CreateStyleForWidget(gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 0),
MOZ_GTK_TOOLTIP);
break;
case MOZ_GTK_TOOLTIP_BOX_LABEL:
style = CreateStyleForWidget(gtk_label_new(nullptr), MOZ_GTK_TOOLTIP_BOX);
break;
default:
GtkWidget* widget = GetWidget(aNodeType);
MOZ_ASSERT(widget);
return gtk_widget_get_style_context(widget);
}
MOZ_ASSERT(style);
sStyleStorage[aNodeType] = style;
return style;
}
static GtkStyleContext* CreateChildCSSNode(const char* aName,
WidgetNodeType aParentNodeType) {
return CreateCSSNode(aName, GetCssNodeStyleInternal(aParentNodeType));
}
// Create a style context equivalent to a saved root style context of
// |aAppearance| with |aStyleClass| as an additional class. This is used to
// produce a context equivalent to what GTK versions < 3.20 use for many
// internal parts of widgets.
static GtkStyleContext* CreateSubStyleWithClass(WidgetNodeType aAppearance,
const gchar* aStyleClass) {
static auto sGtkWidgetPathIterGetObjectName =
reinterpret_cast<const char* (*)(const GtkWidgetPath*, gint)>(
dlsym(RTLD_DEFAULT, "gtk_widget_path_iter_get_object_name"));
GtkStyleContext* parentStyle = GetWidgetRootStyle(aAppearance);
// Create a new context that behaves like |parentStyle| would after
// gtk_style_context_save(parentStyle).
//
// Avoiding gtk_style_context_save() avoids the need to manage the
// restore, and a new context permits caching style resolution.
//
// gtk_style_context_save(context) changes the node hierarchy of |context|
// to add a new GtkCssNodeDeclaration that is a copy of its original node.
// The new node is a child of the original node, and so the new heirarchy is
// one level deeper. The new node receives the same classes as the
// original, but any changes to the classes on |context| will change only
// the new node. The new node inherits properties from the original node
// (which retains the original heirarchy and classes) and matches CSS rules
// with the new heirarchy and any changes to the classes.
//
// The change in hierarchy can produce some surprises in matching theme CSS
// rules (e.g. https://bugzilla.gnome.org/show_bug.cgi?id=761870#c2), but it
// is important here to produce the same behavior so that rules match the
// same widget parts in Gecko as they do in GTK.
//
// When using public GTK API to construct style contexts, a widget path is
// required. CSS rules are not matched against the style context heirarchy
// but according to the heirarchy in the widget path. The path that matches
// the same CSS rules as a saved context is like the path of |parentStyle|
// but with an extra copy of the head (last) object appended. Setting
// |parentStyle| as the parent context provides the same inheritance of
// properties from the widget root node.
const GtkWidgetPath* parentPath = gtk_style_context_get_path(parentStyle);
const gchar* name = sGtkWidgetPathIterGetObjectName
? sGtkWidgetPathIterGetObjectName(parentPath, -1)
: nullptr;
GType objectType = gtk_widget_path_get_object_type(parentPath);
GtkStyleContext* style = CreateCSSNode(name, parentStyle, objectType);
// Start with the same classes on the new node as were on |parentStyle|.
// GTK puts no regions or junction_sides on widget root nodes, and so there
// is no need to copy these.
AddStyleClassesFromStyle(style, parentStyle);
gtk_style_context_add_class(style, aStyleClass);
return style;
}
/* GetCssNodeStyleInternal is used by Gtk >= 3.20 */
static GtkStyleContext* GetCssNodeStyleInternal(WidgetNodeType aNodeType) {
GtkStyleContext* style = sStyleStorage[aNodeType];
if (style) return style;
switch (aNodeType) {
case MOZ_GTK_SCROLLBAR_CONTENTS_VERTICAL:
style = CreateChildCSSNode("contents", MOZ_GTK_SCROLLBAR_VERTICAL);
break;
case MOZ_GTK_SCROLLBAR_TROUGH_VERTICAL:
style = CreateChildCSSNode(GTK_STYLE_CLASS_TROUGH,
MOZ_GTK_SCROLLBAR_CONTENTS_VERTICAL);
break;
case MOZ_GTK_SCROLLBAR_THUMB_VERTICAL:
style = CreateChildCSSNode(GTK_STYLE_CLASS_SLIDER,
MOZ_GTK_SCROLLBAR_TROUGH_VERTICAL);
break;
case MOZ_GTK_RADIOBUTTON:
style = CreateChildCSSNode(GTK_STYLE_CLASS_RADIO,
MOZ_GTK_RADIOBUTTON_CONTAINER);
break;
case MOZ_GTK_CHECKBUTTON:
style = CreateChildCSSNode(GTK_STYLE_CLASS_CHECK,
MOZ_GTK_CHECKBUTTON_CONTAINER);
break;
case MOZ_GTK_RADIOMENUITEM_INDICATOR:
style = CreateChildCSSNode(GTK_STYLE_CLASS_RADIO, MOZ_GTK_RADIOMENUITEM);
break;
case MOZ_GTK_CHECKMENUITEM_INDICATOR:
style = CreateChildCSSNode(GTK_STYLE_CLASS_CHECK, MOZ_GTK_CHECKMENUITEM);
break;
case MOZ_GTK_PROGRESS_TROUGH:
/* Progress bar background (trough) */
style = CreateChildCSSNode(GTK_STYLE_CLASS_TROUGH, MOZ_GTK_PROGRESSBAR);
break;
case MOZ_GTK_PROGRESS_CHUNK:
style = CreateChildCSSNode("progress", MOZ_GTK_PROGRESS_TROUGH);
break;
case MOZ_GTK_GRIPPER:
// TODO - create from CSS node
style = CreateSubStyleWithClass(MOZ_GTK_GRIPPER, GTK_STYLE_CLASS_GRIP);
break;
case MOZ_GTK_SPINBUTTON_ENTRY:
// TODO - create from CSS node
style =
CreateSubStyleWithClass(MOZ_GTK_SPINBUTTON, GTK_STYLE_CLASS_ENTRY);
break;
case MOZ_GTK_SCROLLED_WINDOW:
// TODO - create from CSS node
style = CreateSubStyleWithClass(MOZ_GTK_SCROLLED_WINDOW,
GTK_STYLE_CLASS_FRAME);
break;
case MOZ_GTK_TEXT_VIEW_TEXT_SELECTION:
style = CreateChildCSSNode("selection", MOZ_GTK_TEXT_VIEW_TEXT);
break;
case MOZ_GTK_TEXT_VIEW_TEXT:
case MOZ_GTK_RESIZER:
style = CreateChildCSSNode("text", MOZ_GTK_TEXT_VIEW);
if (aNodeType == MOZ_GTK_RESIZER) {
// The "grip" class provides the correct builtin icon from
// gtk_render_handle(). The icon is drawn with shaded variants of
// the background color, and so a transparent background would lead to
// a transparent resizer. gtk_render_handle() also uses the
// background color to draw a background, and so this style otherwise
// matches what is used in GtkTextView to match the background with
// textarea elements.
GdkRGBA color;
gtk_style_context_get_background_color(style, GTK_STATE_FLAG_NORMAL,
&color);
if (color.alpha == 0.0) {
g_object_unref(style);
style = CreateStyleForWidget(gtk_text_view_new(),
MOZ_GTK_SCROLLED_WINDOW);
}
gtk_style_context_add_class(style, GTK_STYLE_CLASS_GRIP);
}
break;
case MOZ_GTK_FRAME_BORDER:
style = CreateChildCSSNode("border", MOZ_GTK_FRAME);
break;
case MOZ_GTK_TREEVIEW_VIEW:
// TODO - create from CSS node
style = CreateSubStyleWithClass(MOZ_GTK_TREEVIEW, GTK_STYLE_CLASS_VIEW);
break;
case MOZ_GTK_TREEVIEW_EXPANDER:
// TODO - create from CSS node
style =
CreateSubStyleWithClass(MOZ_GTK_TREEVIEW, GTK_STYLE_CLASS_EXPANDER);
break;
case MOZ_GTK_SPLITTER_SEPARATOR_HORIZONTAL:
style = CreateChildCSSNode("separator", MOZ_GTK_SPLITTER_HORIZONTAL);
break;
case MOZ_GTK_SPLITTER_SEPARATOR_VERTICAL:
style = CreateChildCSSNode("separator", MOZ_GTK_SPLITTER_VERTICAL);
break;
case MOZ_GTK_SCALE_CONTENTS_HORIZONTAL:
style = CreateChildCSSNode("contents", MOZ_GTK_SCALE_HORIZONTAL);
break;
case MOZ_GTK_SCALE_CONTENTS_VERTICAL:
style = CreateChildCSSNode("contents", MOZ_GTK_SCALE_VERTICAL);
break;
case MOZ_GTK_SCALE_TROUGH_HORIZONTAL:
style = CreateChildCSSNode(GTK_STYLE_CLASS_TROUGH,
MOZ_GTK_SCALE_CONTENTS_HORIZONTAL);
break;
case MOZ_GTK_SCALE_TROUGH_VERTICAL:
style = CreateChildCSSNode(GTK_STYLE_CLASS_TROUGH,
MOZ_GTK_SCALE_CONTENTS_VERTICAL);
break;
case MOZ_GTK_SCALE_THUMB_HORIZONTAL:
style = CreateChildCSSNode(GTK_STYLE_CLASS_SLIDER,
MOZ_GTK_SCALE_TROUGH_HORIZONTAL);
break;
case MOZ_GTK_SCALE_THUMB_VERTICAL:
style = CreateChildCSSNode(GTK_STYLE_CLASS_SLIDER,
MOZ_GTK_SCALE_TROUGH_VERTICAL);
break;
case MOZ_GTK_TAB_TOP: {
// TODO - create from CSS node
style = CreateSubStyleWithClass(MOZ_GTK_NOTEBOOK, GTK_STYLE_CLASS_TOP);
gtk_style_context_add_region(style, GTK_STYLE_REGION_TAB,
static_cast<GtkRegionFlags>(0));
break;
}
case MOZ_GTK_TAB_BOTTOM: {
// TODO - create from CSS node
style = CreateSubStyleWithClass(MOZ_GTK_NOTEBOOK, GTK_STYLE_CLASS_BOTTOM);
gtk_style_context_add_region(style, GTK_STYLE_REGION_TAB,
static_cast<GtkRegionFlags>(0));
break;
}
case MOZ_GTK_NOTEBOOK:
case MOZ_GTK_NOTEBOOK_HEADER:
case MOZ_GTK_TABPANELS:
case MOZ_GTK_TAB_SCROLLARROW: {
// TODO - create from CSS node
GtkWidget* widget = GetWidget(MOZ_GTK_NOTEBOOK);
return gtk_widget_get_style_context(widget);
}
case MOZ_GTK_HEADER_BAR_BUTTON_MAXIMIZE_RESTORE: {
NS_ASSERTION(
false, "MOZ_GTK_HEADER_BAR_BUTTON_RESTORE is used as an icon only!");
return nullptr;
}
case MOZ_GTK_MENUPOPUP_DECORATION: {
GtkStyleContext* parentStyle =
CreateSubStyleWithClass(MOZ_GTK_MENUPOPUP, "csd");
style = CreateCSSNode("decoration", parentStyle);
g_object_unref(parentStyle);
break;
}
case MOZ_GTK_WINDOW_DECORATION: {
GtkStyleContext* parentStyle =
CreateSubStyleWithClass(MOZ_GTK_WINDOW, "csd");
style = CreateCSSNode("decoration", parentStyle);
g_object_unref(parentStyle);
break;
}
case MOZ_GTK_WINDOW_DECORATION_SOLID: {
GtkStyleContext* parentStyle =
CreateSubStyleWithClass(MOZ_GTK_WINDOW, "solid-csd");
style = CreateCSSNode("decoration", parentStyle);
g_object_unref(parentStyle);
break;
}
default:
return GetWidgetRootStyle(aNodeType);
}
MOZ_ASSERT(style, "missing style context for node type");
sStyleStorage[aNodeType] = style;
return style;
}
/* GetWidgetStyleInternal is used by Gtk < 3.20 */
static GtkStyleContext* GetWidgetStyleInternal(WidgetNodeType aNodeType) {
GtkStyleContext* style = sStyleStorage[aNodeType];
if (style) return style;
switch (aNodeType) {
case MOZ_GTK_SCROLLBAR_TROUGH_VERTICAL:
style = CreateSubStyleWithClass(MOZ_GTK_SCROLLBAR_VERTICAL,
GTK_STYLE_CLASS_TROUGH);
break;
case MOZ_GTK_SCROLLBAR_THUMB_VERTICAL:
style = CreateSubStyleWithClass(MOZ_GTK_SCROLLBAR_VERTICAL,
GTK_STYLE_CLASS_SLIDER);
break;
case MOZ_GTK_RADIOBUTTON:
style = CreateSubStyleWithClass(MOZ_GTK_RADIOBUTTON_CONTAINER,
GTK_STYLE_CLASS_RADIO);
break;
case MOZ_GTK_CHECKBUTTON:
style = CreateSubStyleWithClass(MOZ_GTK_CHECKBUTTON_CONTAINER,
GTK_STYLE_CLASS_CHECK);
break;
case MOZ_GTK_RADIOMENUITEM_INDICATOR:
style =
CreateSubStyleWithClass(MOZ_GTK_RADIOMENUITEM, GTK_STYLE_CLASS_RADIO);
break;
case MOZ_GTK_CHECKMENUITEM_INDICATOR:
style =
CreateSubStyleWithClass(MOZ_GTK_CHECKMENUITEM, GTK_STYLE_CLASS_CHECK);
break;
case MOZ_GTK_PROGRESS_TROUGH:
style =
CreateSubStyleWithClass(MOZ_GTK_PROGRESSBAR, GTK_STYLE_CLASS_TROUGH);
break;
case MOZ_GTK_PROGRESS_CHUNK:
style = CreateSubStyleWithClass(MOZ_GTK_PROGRESSBAR,
GTK_STYLE_CLASS_PROGRESSBAR);
gtk_style_context_remove_class(style, GTK_STYLE_CLASS_TROUGH);
break;
case MOZ_GTK_GRIPPER:
style = CreateSubStyleWithClass(MOZ_GTK_GRIPPER, GTK_STYLE_CLASS_GRIP);
break;
case MOZ_GTK_SPINBUTTON_ENTRY:
style =
CreateSubStyleWithClass(MOZ_GTK_SPINBUTTON, GTK_STYLE_CLASS_ENTRY);
break;
case MOZ_GTK_SCROLLED_WINDOW:
style = CreateSubStyleWithClass(MOZ_GTK_SCROLLED_WINDOW,
GTK_STYLE_CLASS_FRAME);
break;
case MOZ_GTK_TEXT_VIEW_TEXT:
case MOZ_GTK_RESIZER:
// GTK versions prior to 3.20 do not have the view class on the root
// node, but add this to determine the background for the text window.
style = CreateSubStyleWithClass(MOZ_GTK_TEXT_VIEW, GTK_STYLE_CLASS_VIEW);
if (aNodeType == MOZ_GTK_RESIZER) {
// The "grip" class provides the correct builtin icon from
// gtk_render_handle(). The icon is drawn with shaded variants of
// the background color, and so a transparent background would lead to
// a transparent resizer. gtk_render_handle() also uses the
// background color to draw a background, and so this style otherwise
// matches MOZ_GTK_TEXT_VIEW_TEXT to match the background with
// textarea elements. GtkTextView creates a separate text window and
// so the background should not be transparent.
gtk_style_context_add_class(style, GTK_STYLE_CLASS_GRIP);
}
break;
case MOZ_GTK_FRAME_BORDER:
return GetWidgetRootStyle(MOZ_GTK_FRAME);
case MOZ_GTK_TREEVIEW_VIEW:
style = CreateSubStyleWithClass(MOZ_GTK_TREEVIEW, GTK_STYLE_CLASS_VIEW);
break;
case MOZ_GTK_TREEVIEW_EXPANDER:
style =
CreateSubStyleWithClass(MOZ_GTK_TREEVIEW, GTK_STYLE_CLASS_EXPANDER);
break;
case MOZ_GTK_SPLITTER_SEPARATOR_HORIZONTAL:
style = CreateSubStyleWithClass(MOZ_GTK_SPLITTER_HORIZONTAL,
GTK_STYLE_CLASS_PANE_SEPARATOR);
break;
case MOZ_GTK_SPLITTER_SEPARATOR_VERTICAL:
style = CreateSubStyleWithClass(MOZ_GTK_SPLITTER_VERTICAL,
GTK_STYLE_CLASS_PANE_SEPARATOR);
break;
case MOZ_GTK_SCALE_TROUGH_HORIZONTAL:
style = CreateSubStyleWithClass(MOZ_GTK_SCALE_HORIZONTAL,
GTK_STYLE_CLASS_TROUGH);
break;
case MOZ_GTK_SCALE_TROUGH_VERTICAL:
style = CreateSubStyleWithClass(MOZ_GTK_SCALE_VERTICAL,
GTK_STYLE_CLASS_TROUGH);
break;
case MOZ_GTK_SCALE_THUMB_HORIZONTAL:
style = CreateSubStyleWithClass(MOZ_GTK_SCALE_HORIZONTAL,
GTK_STYLE_CLASS_SLIDER);
break;
case MOZ_GTK_SCALE_THUMB_VERTICAL:
style = CreateSubStyleWithClass(MOZ_GTK_SCALE_VERTICAL,
GTK_STYLE_CLASS_SLIDER);
break;
case MOZ_GTK_TAB_TOP:
style = CreateSubStyleWithClass(MOZ_GTK_NOTEBOOK, GTK_STYLE_CLASS_TOP);
gtk_style_context_add_region(style, GTK_STYLE_REGION_TAB,
static_cast<GtkRegionFlags>(0));
break;
case MOZ_GTK_TAB_BOTTOM:
style = CreateSubStyleWithClass(MOZ_GTK_NOTEBOOK, GTK_STYLE_CLASS_BOTTOM);
gtk_style_context_add_region(style, GTK_STYLE_REGION_TAB,
static_cast<GtkRegionFlags>(0));
break;
case MOZ_GTK_NOTEBOOK:
case MOZ_GTK_NOTEBOOK_HEADER:
case MOZ_GTK_TABPANELS:
case MOZ_GTK_TAB_SCROLLARROW: {
GtkWidget* widget = GetWidget(MOZ_GTK_NOTEBOOK);
return gtk_widget_get_style_context(widget);
}
default:
return GetWidgetRootStyle(aNodeType);
}
MOZ_ASSERT(style);
sStyleStorage[aNodeType] = style;
return style;
}
void ResetWidgetCache() {
for (int i = 0; i < MOZ_GTK_WIDGET_NODE_COUNT; i++) {
if (sStyleStorage[i]) g_object_unref(sStyleStorage[i]);
}
mozilla::PodArrayZero(sStyleStorage);
gCSDStyle = CSDStyle::Unknown;
/* This will destroy all of our widgets */
if (sWidgetStorage[MOZ_GTK_WINDOW]) {
gtk_widget_destroy(sWidgetStorage[MOZ_GTK_WINDOW]);
}
if (sWidgetStorage[MOZ_GTK_HEADERBAR_WINDOW]) {
gtk_widget_destroy(sWidgetStorage[MOZ_GTK_HEADERBAR_WINDOW]);
}
if (sWidgetStorage[MOZ_GTK_HEADERBAR_WINDOW_MAXIMIZED]) {
gtk_widget_destroy(sWidgetStorage[MOZ_GTK_HEADERBAR_WINDOW_MAXIMIZED]);
}
/* Clear already freed arrays */
mozilla::PodArrayZero(sWidgetStorage);
}
GtkStyleContext* GetStyleContext(WidgetNodeType aNodeType, int aScale,
GtkTextDirection aDirection,
GtkStateFlags aStateFlags) {
GtkStyleContext* style;
if (gtk_check_version(3, 20, 0) != nullptr) {
style = GetWidgetStyleInternal(aNodeType);
} else {
style = GetCssNodeStyleInternal(aNodeType);
StyleContextSetScale(style, aScale);
}
bool stateChanged = false;
bool stateHasDirection = gtk_get_minor_version() >= 8;
GtkStateFlags oldState = gtk_style_context_get_state(style);
MOZ_ASSERT(!(aStateFlags & (STATE_FLAG_DIR_LTR | STATE_FLAG_DIR_RTL)));
unsigned newState = aStateFlags;
if (stateHasDirection) {
switch (aDirection) {
case GTK_TEXT_DIR_LTR:
newState |= STATE_FLAG_DIR_LTR;
break;
case GTK_TEXT_DIR_RTL:
newState |= STATE_FLAG_DIR_RTL;
break;
default:
MOZ_FALLTHROUGH_ASSERT("Bad GtkTextDirection");
case GTK_TEXT_DIR_NONE:
// GtkWidget uses a default direction if neither is explicitly
// specified, but here DIR_NONE is interpreted as meaning the
// direction is not important, so don't change the direction
// unnecessarily.
newState |= oldState & (STATE_FLAG_DIR_LTR | STATE_FLAG_DIR_RTL);
}
} else if (aDirection != GTK_TEXT_DIR_NONE) {
GtkTextDirection oldDirection = gtk_style_context_get_direction(style);
if (aDirection != oldDirection) {
gtk_style_context_set_direction(style, aDirection);
stateChanged = true;
}
}
if (oldState != newState) {
gtk_style_context_set_state(style, static_cast<GtkStateFlags>(newState));
stateChanged = true;
}
// This invalidate is necessary for unsaved style contexts from GtkWidgets
// in pre-3.18 GTK, because automatic invalidation of such contexts
// was delayed until a resize event runs.
//
// https://bugzilla.mozilla.org/show_bug.cgi?id=1272194#c7
//
// Avoid calling invalidate on contexts that are not owned and constructed
// by widgets to avoid performing build_properties() (in 3.16 stylecontext.c)
// unnecessarily early.
if (stateChanged && sWidgetStorage[aNodeType]) {
gtk_style_context_invalidate(style);
}
return style;
}
GtkStyleContext* CreateStyleContextWithStates(WidgetNodeType aNodeType,
int aScale,
GtkTextDirection aDirection,
GtkStateFlags aStateFlags) {
GtkStyleContext* style =
GetStyleContext(aNodeType, aScale, aDirection, aStateFlags);
GtkWidgetPath* path = gtk_widget_path_copy(gtk_style_context_get_path(style));
static auto sGtkWidgetPathIterGetState =
(GtkStateFlags(*)(const GtkWidgetPath*, gint))dlsym(
RTLD_DEFAULT, "gtk_widget_path_iter_get_state");
static auto sGtkWidgetPathIterSetState =
(void (*)(GtkWidgetPath*, gint, GtkStateFlags))dlsym(
RTLD_DEFAULT, "gtk_widget_path_iter_set_state");
int pathLength = gtk_widget_path_length(path);
for (int i = 0; i < pathLength; i++) {
unsigned state = aStateFlags | sGtkWidgetPathIterGetState(path, i);
sGtkWidgetPathIterSetState(path, i, GtkStateFlags(state));
}
style = gtk_style_context_new();
gtk_style_context_set_path(style, path);
gtk_widget_path_unref(path);
return style;
}
void StyleContextSetScale(GtkStyleContext* style, gint aScaleFactor) {
// Support HiDPI styles on Gtk 3.20+
static auto sGtkStyleContextSetScalePtr =
(void (*)(GtkStyleContext*, gint))dlsym(RTLD_DEFAULT,
"gtk_style_context_set_scale");
if (sGtkStyleContextSetScalePtr && style) {
sGtkStyleContextSetScalePtr(style, aScaleFactor);
}
}
bool HeaderBarShouldDrawContainer(WidgetNodeType aNodeType) {
MOZ_ASSERT(aNodeType == MOZ_GTK_HEADER_BAR ||
aNodeType == MOZ_GTK_HEADER_BAR_MAXIMIZED);
mozilla::Unused << GetWidget(aNodeType);
return aNodeType == MOZ_GTK_HEADER_BAR
? gHeaderBarShouldDrawContainer
: gMaximizedHeaderBarShouldDrawContainer;
}
gint GetBorderRadius(GtkStyleContext* aStyle) {
GValue value = G_VALUE_INIT;
// NOTE(emilio): In an ideal world, we'd query the two longhands
// (border-top-left-radius and border-top-right-radius) separately. However,
// that doesn't work (GTK rejects the query with:
//
// Style property "border-top-left-radius" is not gettable
//
// However! Getting border-radius does work, and it does return the
// border-top-left-radius as a gint:
//
// https://docs.gtk.org/gtk3/const.STYLE_PROPERTY_BORDER_RADIUS.html
// https://gitlab.gnome.org/GNOME/gtk/-/blob/gtk-3-20/gtk/gtkcssshorthandpropertyimpl.c#L961-977
//
// So we abuse this fact, and make the assumption here that the
// border-top-{left,right}-radius are the same, and roll with it.
gtk_style_context_get_property(aStyle, "border-radius", GTK_STATE_FLAG_NORMAL,
&value);
gint result = 0;
auto type = G_VALUE_TYPE(&value);
if (type == G_TYPE_INT) {
result = g_value_get_int(&value);
} else {
NS_WARNING(nsPrintfCString("Unknown value type %lu for border-radius", type)
.get());
}
g_value_unset(&value);
return result;
}
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