diff options
Diffstat (limited to 'widget/gtk/WidgetStyleCache.cpp')
| -rw-r--r-- | widget/gtk/WidgetStyleCache.cpp | 1434 |
1 files changed, 1434 insertions, 0 deletions
diff --git a/widget/gtk/WidgetStyleCache.cpp b/widget/gtk/WidgetStyleCache.cpp new file mode 100644 index 0000000000..b7c1cf8a9f --- /dev/null +++ b/widget/gtk/WidgetStyleCache.cpp @@ -0,0 +1,1434 @@ +/* -*- 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* 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* CreateMenuBarWidget() { + GtkWidget* widget = gtk_menu_bar_new(); + AddToWindowContainer(widget); + 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* 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* 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* 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, >kIconSize); + + 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, "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(headerBar), 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_MAXIMIZED), + 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_MENUPOPUP: + return CreateMenuPopupWidget(); + case MOZ_GTK_MENUBAR: + return CreateMenuBarWidget(); + case MOZ_GTK_EXPANDER: + return CreateExpanderWidget(); + case MOZ_GTK_FRAME: + return CreateFrameWidget(); + 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_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_MENUITEM: + style = CreateStyleForWidget(gtk_menu_item_new(), MOZ_GTK_MENUPOPUP); + break; + case MOZ_GTK_MENUBARITEM: + style = CreateStyleForWidget(gtk_menu_item_new(), MOZ_GTK_MENUBAR); + 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_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_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_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_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_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; +} |