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gecko-dev/widget/gtk/nsLookAndFeel.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:expandtab:shiftwidth=2:tabstop=2:
*/
/* 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/. */
// for strtod()
#include <stdlib.h>
#include <dlfcn.h>
#include "nsLookAndFeel.h"
#include <gtk/gtk.h>
#include <gdk/gdk.h>
#include <pango/pango.h>
#include <pango/pango-fontmap.h>
#include <fontconfig/fontconfig.h>
#include "nsGtkUtils.h"
#include "gfxPlatformGtk.h"
#include "mozilla/FontPropertyTypes.h"
#include "mozilla/Preferences.h"
#include "mozilla/RelativeLuminanceUtils.h"
#include "mozilla/StaticPrefs_layout.h"
#include "mozilla/StaticPrefs_widget.h"
#include "mozilla/StaticPrefs_browser.h"
#include "mozilla/AutoRestore.h"
#include "mozilla/Telemetry.h"
#include "mozilla/ScopeExit.h"
#include "mozilla/WidgetUtilsGtk.h"
#include "ScreenHelperGTK.h"
#include "ScrollbarDrawing.h"
#include "gtkdrawing.h"
#include "nsStyleConsts.h"
#include "gfxFontConstants.h"
#include "WidgetUtils.h"
#include "nsWindow.h"
#include "mozilla/gfx/2D.h"
#include <cairo-gobject.h>
#include "WidgetStyleCache.h"
#include "prenv.h"
#include "nsCSSColorUtils.h"
using namespace mozilla;
using namespace mozilla::widget;
#ifdef MOZ_LOGGING
# include "mozilla/Logging.h"
# include "nsTArray.h"
# include "Units.h"
static LazyLogModule gLnfLog("LookAndFeel");
# define LOGLNF(...) MOZ_LOG(gLnfLog, LogLevel::Debug, (__VA_ARGS__))
# define LOGLNF_ENABLED() MOZ_LOG_TEST(gLnfLog, LogLevel::Debug)
#else
# define LOGLNF(args)
# define LOGLNF_ENABLED() false
#endif /* MOZ_LOGGING */
#define GDK_COLOR_TO_NS_RGB(c) \
((nscolor)NS_RGB(c.red >> 8, c.green >> 8, c.blue >> 8))
#define GDK_RGBA_TO_NS_RGBA(c) \
((nscolor)NS_RGBA((int)((c).red * 255), (int)((c).green * 255), \
(int)((c).blue * 255), (int)((c).alpha * 255)))
static bool sIgnoreChangedSettings = false;
static void settings_changed_cb(GtkSettings*, GParamSpec*, void*) {
if (sIgnoreChangedSettings) {
return;
}
// TODO: We could be more granular here, but for now assume everything
// changed.
LookAndFeel::NotifyChangedAllWindows(widget::ThemeChangeKind::StyleAndLayout);
widget::IMContextWrapper::OnThemeChanged();
}
static bool sCSDAvailable;
nsLookAndFeel::nsLookAndFeel() {
static constexpr nsLiteralCString kObservedSettings[] = {
// Affects system font sizes.
"notify::gtk-xft-dpi"_ns,
// Affects mSystemTheme and mAltTheme as expected.
"notify::gtk-theme-name"_ns,
// System fonts?
"notify::gtk-font-name"_ns,
// prefers-reduced-motion
"notify::gtk-enable-animations"_ns,
// CSD media queries, etc.
"notify::gtk-decoration-layout"_ns,
// Text resolution affects system font and widget sizes.
"notify::resolution"_ns,
// These three Affect mCaretBlinkTime
"notify::gtk-cursor-blink"_ns,
"notify::gtk-cursor-blink-time"_ns,
"notify::gtk-cursor-blink-timeout"_ns,
// Affects SelectTextfieldsOnKeyFocus
"notify::gtk-entry-select-on-focus"_ns,
// Affects ScrollToClick
"notify::gtk-primary-button-warps-slider"_ns,
// Affects SubmenuDelay
"notify::gtk-menu-popup-delay"_ns,
// Affects DragThresholdX/Y
"notify::gtk-dnd-drag-threshold"_ns,
};
GtkSettings* settings = gtk_settings_get_default();
for (const auto& setting : kObservedSettings) {
g_signal_connect_after(settings, setting.get(),
G_CALLBACK(settings_changed_cb), nullptr);
}
sCSDAvailable =
nsWindow::GetSystemGtkWindowDecoration() != nsWindow::GTK_DECORATION_NONE;
}
nsLookAndFeel::~nsLookAndFeel() {
g_signal_handlers_disconnect_by_func(
gtk_settings_get_default(), FuncToGpointer(settings_changed_cb), nullptr);
}
#if 0
static void DumpStyleContext(GtkStyleContext* aStyle) {
static auto sGtkStyleContextToString =
reinterpret_cast<char* (*)(GtkStyleContext*, gint)>(
dlsym(RTLD_DEFAULT, "gtk_style_context_to_string"));
char* str = sGtkStyleContextToString(aStyle, ~0);
printf("%s\n", str);
g_free(str);
str = gtk_widget_path_to_string(gtk_style_context_get_path(aStyle));
printf("%s\n", str);
g_free(str);
}
#endif
// Modifies color |*aDest| as if a pattern of color |aSource| was painted with
// CAIRO_OPERATOR_OVER to a surface with color |*aDest|.
static void ApplyColorOver(const GdkRGBA& aSource, GdkRGBA* aDest) {
gdouble sourceCoef = aSource.alpha;
gdouble destCoef = aDest->alpha * (1.0 - sourceCoef);
gdouble resultAlpha = sourceCoef + destCoef;
if (resultAlpha != 0.0) { // don't divide by zero
destCoef /= resultAlpha;
sourceCoef /= resultAlpha;
aDest->red = sourceCoef * aSource.red + destCoef * aDest->red;
aDest->green = sourceCoef * aSource.green + destCoef * aDest->green;
aDest->blue = sourceCoef * aSource.blue + destCoef * aDest->blue;
aDest->alpha = resultAlpha;
}
}
static void GetLightAndDarkness(const GdkRGBA& aColor, double* aLightness,
double* aDarkness) {
double sum = aColor.red + aColor.green + aColor.blue;
*aLightness = sum * aColor.alpha;
*aDarkness = (3.0 - sum) * aColor.alpha;
}
static bool GetGradientColors(const GValue* aValue, GdkRGBA* aLightColor,
GdkRGBA* aDarkColor) {
if (!G_TYPE_CHECK_VALUE_TYPE(aValue, CAIRO_GOBJECT_TYPE_PATTERN)) {
return false;
}
auto pattern = static_cast<cairo_pattern_t*>(g_value_get_boxed(aValue));
if (!pattern) {
return false;
}
// Just picking the lightest and darkest colors as simple samples rather
// than trying to blend, which could get messy if there are many stops.
if (CAIRO_STATUS_SUCCESS !=
cairo_pattern_get_color_stop_rgba(pattern, 0, nullptr, &aDarkColor->red,
&aDarkColor->green, &aDarkColor->blue,
&aDarkColor->alpha)) {
return false;
}
double maxLightness, maxDarkness;
GetLightAndDarkness(*aDarkColor, &maxLightness, &maxDarkness);
*aLightColor = *aDarkColor;
GdkRGBA stop;
for (int index = 1;
CAIRO_STATUS_SUCCESS ==
cairo_pattern_get_color_stop_rgba(pattern, index, nullptr, &stop.red,
&stop.green, &stop.blue, &stop.alpha);
++index) {
double lightness, darkness;
GetLightAndDarkness(stop, &lightness, &darkness);
if (lightness > maxLightness) {
maxLightness = lightness;
*aLightColor = stop;
}
if (darkness > maxDarkness) {
maxDarkness = darkness;
*aDarkColor = stop;
}
}
return true;
}
static bool GetColorFromImagePattern(const GValue* aValue, nscolor* aColor) {
if (!G_TYPE_CHECK_VALUE_TYPE(aValue, CAIRO_GOBJECT_TYPE_PATTERN)) {
return false;
}
auto pattern = static_cast<cairo_pattern_t*>(g_value_get_boxed(aValue));
if (!pattern) {
return false;
}
cairo_surface_t* surface;
if (cairo_pattern_get_surface(pattern, &surface) != CAIRO_STATUS_SUCCESS) {
return false;
}
cairo_format_t format = cairo_image_surface_get_format(surface);
if (format == CAIRO_FORMAT_INVALID) {
return false;
}
int width = cairo_image_surface_get_width(surface);
int height = cairo_image_surface_get_height(surface);
int stride = cairo_image_surface_get_stride(surface);
if (!width || !height) {
return false;
}
// Guesstimate the central pixel would have a sensible color.
int x = width / 2;
int y = height / 2;
unsigned char* data = cairo_image_surface_get_data(surface);
switch (format) {
// Most (all?) GTK images / patterns / etc use ARGB32.
case CAIRO_FORMAT_ARGB32: {
size_t offset = x * 4 + y * stride;
uint32_t* pixel = reinterpret_cast<uint32_t*>(data + offset);
*aColor = gfx::sRGBColor::UnusualFromARGB(*pixel).ToABGR();
return true;
}
default:
break;
}
return false;
}
static bool GetUnicoBorderGradientColors(GtkStyleContext* aContext,
GdkRGBA* aLightColor,
GdkRGBA* aDarkColor) {
// Ubuntu 12.04 has GTK engine Unico-1.0.2, which overrides render_frame,
// providing its own border code. Ubuntu 14.04 has
// Unico-1.0.3+14.04.20140109, which does not override render_frame, and
// so does not need special attention. The earlier Unico can be detected
// by the -unico-border-gradient style property it registers.
// gtk_style_properties_lookup_property() is checked first to avoid the
// warning from gtk_style_context_get_property() when the property does
// not exist. (gtk_render_frame() of GTK+ 3.16 no longer uses the
// engine.)
const char* propertyName = "-unico-border-gradient";
if (!gtk_style_properties_lookup_property(propertyName, nullptr, nullptr))
return false;
// -unico-border-gradient is used only when the CSS node's engine is Unico.
GtkThemingEngine* engine;
GtkStateFlags state = gtk_style_context_get_state(aContext);
gtk_style_context_get(aContext, state, "engine", &engine, nullptr);
if (strcmp(g_type_name(G_TYPE_FROM_INSTANCE(engine)), "UnicoEngine") != 0)
return false;
// draw_border() of Unico engine uses -unico-border-gradient
// in preference to border-color.
GValue value = G_VALUE_INIT;
gtk_style_context_get_property(aContext, propertyName, state, &value);
bool result = GetGradientColors(&value, aLightColor, aDarkColor);
g_value_unset(&value);
return result;
}
// Sets |aLightColor| and |aDarkColor| to colors from |aContext|. Returns
// true if |aContext| uses these colors to render a visible border.
// If returning false, then the colors returned are a fallback from the
// border-color value even though |aContext| does not use these colors to
// render a border.
static bool GetBorderColors(GtkStyleContext* aContext, GdkRGBA* aLightColor,
GdkRGBA* aDarkColor) {
// Determine whether the border on this style context is visible.
GtkStateFlags state = gtk_style_context_get_state(aContext);
GtkBorderStyle borderStyle;
gtk_style_context_get(aContext, state, GTK_STYLE_PROPERTY_BORDER_STYLE,
&borderStyle, nullptr);
bool visible = borderStyle != GTK_BORDER_STYLE_NONE &&
borderStyle != GTK_BORDER_STYLE_HIDDEN;
if (visible) {
// GTK has an initial value of zero for border-widths, and so themes
// need to explicitly set border-widths to make borders visible.
GtkBorder border;
gtk_style_context_get_border(aContext, state, &border);
visible = border.top != 0 || border.right != 0 || border.bottom != 0 ||
border.left != 0;
}
if (visible &&
GetUnicoBorderGradientColors(aContext, aLightColor, aDarkColor))
return true;
// The initial value for the border-color is the foreground color, and so
// this will usually return a color distinct from the background even if
// there is no visible border detected.
gtk_style_context_get_border_color(aContext, state, aDarkColor);
// TODO GTK3 - update aLightColor
// for GTK_BORDER_STYLE_INSET/OUTSET/GROVE/RIDGE border styles.
// https://bugzilla.mozilla.org/show_bug.cgi?id=978172#c25
*aLightColor = *aDarkColor;
return visible;
}
static bool GetBorderColors(GtkStyleContext* aContext, nscolor* aLightColor,
nscolor* aDarkColor) {
GdkRGBA lightColor, darkColor;
bool ret = GetBorderColors(aContext, &lightColor, &darkColor);
*aLightColor = GDK_RGBA_TO_NS_RGBA(lightColor);
*aDarkColor = GDK_RGBA_TO_NS_RGBA(darkColor);
return ret;
}
// Finds ideal cell highlight colors used for unfocused+selected cells distinct
// from both Highlight, used as focused+selected background, and the listbox
// background which is assumed to be similar to -moz-field
void nsLookAndFeel::PerThemeData::InitCellHighlightColors() {
int32_t minLuminosityDifference = NS_SUFFICIENT_LUMINOSITY_DIFFERENCE_BG;
int32_t backLuminosityDifference =
NS_LUMINOSITY_DIFFERENCE(mMozWindowBackground, mFieldBackground);
if (backLuminosityDifference >= minLuminosityDifference) {
mMozCellHighlightBackground = mMozWindowBackground;
mMozCellHighlightText = mMozWindowText;
return;
}
uint16_t hue, sat, luminance;
uint8_t alpha;
mMozCellHighlightBackground = mFieldBackground;
mMozCellHighlightText = mFieldText;
NS_RGB2HSV(mMozCellHighlightBackground, hue, sat, luminance, alpha);
uint16_t step = 30;
// Lighten the color if the color is very dark
if (luminance <= step) {
luminance += step;
}
// Darken it if it is very light
else if (luminance >= 255 - step) {
luminance -= step;
}
// Otherwise, compute what works best depending on the text luminance.
else {
uint16_t textHue, textSat, textLuminance;
uint8_t textAlpha;
NS_RGB2HSV(mMozCellHighlightText, textHue, textSat, textLuminance,
textAlpha);
// Text is darker than background, use a lighter shade
if (textLuminance < luminance) {
luminance += step;
}
// Otherwise, use a darker shade
else {
luminance -= step;
}
}
NS_HSV2RGB(mMozCellHighlightBackground, hue, sat, luminance, alpha);
}
void nsLookAndFeel::NativeInit() { EnsureInit(); }
void nsLookAndFeel::RefreshImpl() {
mInitialized = false;
moz_gtk_refresh();
nsXPLookAndFeel::RefreshImpl();
}
nsresult nsLookAndFeel::NativeGetColor(ColorID aID, ColorScheme aScheme,
nscolor& aColor) {
EnsureInit();
auto& theme = aScheme == ColorScheme::Light ? LightTheme() : DarkTheme();
return theme.GetColor(aID, aColor);
}
nsresult nsLookAndFeel::PerThemeData::GetColor(ColorID aID,
nscolor& aColor) const {
nsresult res = NS_OK;
switch (aID) {
// These colors don't seem to be used for anything anymore in Mozilla
// The CSS2 colors below are used.
case ColorID::Appworkspace: // MDI background color
case ColorID::Background: // desktop background
case ColorID::Window:
case ColorID::Windowframe:
case ColorID::MozDialog:
case ColorID::MozCombobox:
aColor = mMozWindowBackground;
break;
case ColorID::Windowtext:
case ColorID::MozDialogtext:
aColor = mMozWindowText;
break;
case ColorID::IMESelectedRawTextBackground:
case ColorID::IMESelectedConvertedTextBackground:
case ColorID::MozDragtargetzone:
case ColorID::Highlight: // preference selected item,
aColor = mTextSelectedBackground;
break;
case ColorID::Highlighttext:
if (NS_GET_A(mTextSelectedBackground) < 155) {
aColor = NS_SAME_AS_FOREGROUND_COLOR;
break;
}
[[fallthrough]];
case ColorID::IMESelectedRawTextForeground:
case ColorID::IMESelectedConvertedTextForeground:
aColor = mTextSelectedText;
break;
case ColorID::Selecteditem:
case ColorID::MozAccentColor:
aColor = mAccentColor;
break;
case ColorID::Selecteditemtext:
case ColorID::MozAccentColorForeground:
aColor = mAccentColorForeground;
break;
case ColorID::MozCellhighlight:
aColor = mMozCellHighlightBackground;
break;
case ColorID::MozCellhighlighttext:
aColor = mMozCellHighlightText;
break;
case ColorID::IMERawInputBackground:
case ColorID::IMEConvertedTextBackground:
aColor = NS_TRANSPARENT;
break;
case ColorID::IMERawInputForeground:
case ColorID::IMEConvertedTextForeground:
aColor = NS_SAME_AS_FOREGROUND_COLOR;
break;
case ColorID::IMERawInputUnderline:
case ColorID::IMEConvertedTextUnderline:
aColor = NS_SAME_AS_FOREGROUND_COLOR;
break;
case ColorID::IMESelectedRawTextUnderline:
case ColorID::IMESelectedConvertedTextUnderline:
aColor = NS_TRANSPARENT;
break;
case ColorID::SpellCheckerUnderline:
aColor = NS_RGB(0xff, 0, 0);
break;
case ColorID::ThemedScrollbar:
aColor = mThemedScrollbar;
break;
case ColorID::ThemedScrollbarInactive:
aColor = mThemedScrollbarInactive;
break;
case ColorID::ThemedScrollbarThumb:
aColor = mThemedScrollbarThumb;
break;
case ColorID::ThemedScrollbarThumbHover:
aColor = mThemedScrollbarThumbHover;
break;
case ColorID::ThemedScrollbarThumbActive:
aColor = mThemedScrollbarThumbActive;
break;
case ColorID::ThemedScrollbarThumbInactive:
aColor = mThemedScrollbarThumbInactive;
break;
// css2 http://www.w3.org/TR/REC-CSS2/ui.html#system-colors
case ColorID::Activeborder:
// active window border
aColor = mMozWindowActiveBorder;
break;
case ColorID::Inactiveborder:
// inactive window border
aColor = mMozWindowInactiveBorder;
break;
case ColorID::Graytext: // disabled text in windows, menus, etc.
aColor = mMenuTextInactive;
break;
case ColorID::Activecaption:
aColor = mTitlebarBackground;
break;
case ColorID::Captiontext: // text in active window caption (titlebar)
aColor = mTitlebarText;
break;
case ColorID::Inactivecaption:
// inactive window caption
aColor = mTitlebarInactiveBackground;
break;
case ColorID::Inactivecaptiontext: // text in active window caption
// (titlebar)
aColor = mTitlebarInactiveText;
break;
case ColorID::Infobackground:
// tooltip background color
aColor = mInfoBackground;
break;
case ColorID::Infotext:
// tooltip text color
aColor = mInfoText;
break;
case ColorID::Menu:
// menu background
aColor = mMenuBackground;
break;
case ColorID::Menutext:
// menu text
aColor = mMenuText;
break;
case ColorID::Scrollbar:
// scrollbar gray area
aColor = mMozScrollbar;
break;
case ColorID::Threedface:
case ColorID::Buttonface:
case ColorID::MozButtondisabledface:
// 3-D face color
aColor = mMozWindowBackground;
break;
case ColorID::Buttontext:
// text on push buttons
aColor = mButtonText;
break;
case ColorID::Buttonhighlight:
// 3-D highlighted edge color
case ColorID::Threedhighlight:
// 3-D highlighted outer edge color
aColor = mFrameOuterLightBorder;
break;
case ColorID::Buttonshadow:
// 3-D shadow edge color
case ColorID::Threedshadow:
// 3-D shadow inner edge color
aColor = mFrameInnerDarkBorder;
break;
case ColorID::Threedlightshadow:
case ColorID::MozDisabledfield:
aColor = NS_RGB(0xE0, 0xE0, 0xE0);
break;
case ColorID::Threeddarkshadow:
aColor = NS_RGB(0xDC, 0xDC, 0xDC);
break;
case ColorID::MozEventreerow:
case ColorID::Field:
aColor = mFieldBackground;
break;
case ColorID::Fieldtext:
aColor = mFieldText;
break;
case ColorID::MozButtondefault:
// default button border color
aColor = mButtonDefault;
break;
case ColorID::MozButtonhoverface:
case ColorID::MozButtonactiveface:
aColor = mButtonHoverFace;
break;
case ColorID::MozButtonhovertext:
aColor = mButtonHoverText;
break;
case ColorID::MozButtonactivetext:
aColor = mButtonActiveText;
break;
case ColorID::MozMenuhover:
aColor = mMenuHover;
break;
case ColorID::MozMenuhovertext:
aColor = mMenuHoverText;
break;
case ColorID::MozOddtreerow:
aColor = mOddCellBackground;
break;
case ColorID::MozNativehyperlinktext:
aColor = mNativeHyperLinkText;
break;
case ColorID::MozNativevisitedhyperlinktext:
aColor = mNativeVisitedHyperLinkText;
break;
case ColorID::MozComboboxtext:
aColor = mComboBoxText;
break;
case ColorID::MozMenubartext:
aColor = mMenuBarText;
break;
case ColorID::MozMenubarhovertext:
aColor = mMenuBarHoverText;
break;
case ColorID::MozColheadertext:
aColor = mMozColHeaderText;
break;
case ColorID::MozColheaderhovertext:
aColor = mMozColHeaderHoverText;
break;
default:
/* default color is BLACK */
aColor = 0;
res = NS_ERROR_FAILURE;
break;
}
return res;
}
static int32_t CheckWidgetStyle(GtkWidget* aWidget, const char* aStyle,
int32_t aResult) {
gboolean value = FALSE;
gtk_widget_style_get(aWidget, aStyle, &value, nullptr);
return value ? aResult : 0;
}
static int32_t ConvertGTKStepperStyleToMozillaScrollArrowStyle(
GtkWidget* aWidget) {
if (!aWidget) return mozilla::LookAndFeel::eScrollArrowStyle_Single;
return CheckWidgetStyle(aWidget, "has-backward-stepper",
mozilla::LookAndFeel::eScrollArrow_StartBackward) |
CheckWidgetStyle(aWidget, "has-forward-stepper",
mozilla::LookAndFeel::eScrollArrow_EndForward) |
CheckWidgetStyle(aWidget, "has-secondary-backward-stepper",
mozilla::LookAndFeel::eScrollArrow_EndBackward) |
CheckWidgetStyle(aWidget, "has-secondary-forward-stepper",
mozilla::LookAndFeel::eScrollArrow_StartForward);
}
nsresult nsLookAndFeel::NativeGetInt(IntID aID, int32_t& aResult) {
nsresult res = NS_OK;
// We use delayed initialization by EnsureInit() here
// to make sure mozilla::Preferences is available (Bug 115807).
// IntID::UseAccessibilityTheme is requested before user preferences
// are read, and so EnsureInit(), which depends on preference values,
// is deliberately delayed until required.
switch (aID) {
case IntID::ScrollButtonLeftMouseButtonAction:
aResult = 0;
break;
case IntID::ScrollButtonMiddleMouseButtonAction:
aResult = 1;
break;
case IntID::ScrollButtonRightMouseButtonAction:
aResult = 2;
break;
case IntID::CaretBlinkTime:
EnsureInit();
aResult = mCaretBlinkTime;
break;
case IntID::CaretBlinkCount:
EnsureInit();
aResult = mCaretBlinkCount;
break;
case IntID::CaretWidth:
aResult = 1;
break;
case IntID::ShowCaretDuringSelection:
aResult = 0;
break;
case IntID::SelectTextfieldsOnKeyFocus: {
GtkSettings* settings;
gboolean select_on_focus;
settings = gtk_settings_get_default();
g_object_get(settings, "gtk-entry-select-on-focus", &select_on_focus,
nullptr);
if (select_on_focus)
aResult = 1;
else
aResult = 0;
} break;
case IntID::ScrollToClick: {
GtkSettings* settings;
gboolean warps_slider = FALSE;
settings = gtk_settings_get_default();
if (g_object_class_find_property(G_OBJECT_GET_CLASS(settings),
"gtk-primary-button-warps-slider")) {
g_object_get(settings, "gtk-primary-button-warps-slider", &warps_slider,
nullptr);
}
if (warps_slider)
aResult = 1;
else
aResult = 0;
} break;
case IntID::SubmenuDelay: {
GtkSettings* settings;
gint delay;
settings = gtk_settings_get_default();
g_object_get(settings, "gtk-menu-popup-delay", &delay, nullptr);
aResult = (int32_t)delay;
break;
}
case IntID::TooltipDelay: {
aResult = 500;
break;
}
case IntID::MenusCanOverlapOSBar:
// we want XUL popups to be able to overlap the task bar.
aResult = 1;
break;
case IntID::SkipNavigatingDisabledMenuItem:
aResult = 1;
break;
case IntID::DragThresholdX:
case IntID::DragThresholdY: {
gint threshold = 0;
g_object_get(gtk_settings_get_default(), "gtk-dnd-drag-threshold",
&threshold, nullptr);
aResult = threshold;
} break;
case IntID::ScrollArrowStyle: {
GtkWidget* scrollbar = GetWidget(MOZ_GTK_SCROLLBAR_HORIZONTAL);
aResult = ConvertGTKStepperStyleToMozillaScrollArrowStyle(scrollbar);
break;
}
case IntID::ScrollSliderStyle:
aResult = eScrollThumbStyle_Proportional;
break;
case IntID::TreeOpenDelay:
aResult = 1000;
break;
case IntID::TreeCloseDelay:
aResult = 1000;
break;
case IntID::TreeLazyScrollDelay:
aResult = 150;
break;
case IntID::TreeScrollDelay:
aResult = 100;
break;
case IntID::TreeScrollLinesMax:
aResult = 3;
break;
case IntID::DWMCompositor:
case IntID::WindowsClassic:
case IntID::WindowsDefaultTheme:
case IntID::OperatingSystemVersionIdentifier:
aResult = 0;
res = NS_ERROR_NOT_IMPLEMENTED;
break;
case IntID::AlertNotificationOrigin:
aResult = NS_ALERT_TOP;
break;
case IntID::IMERawInputUnderlineStyle:
case IntID::IMEConvertedTextUnderlineStyle:
aResult = NS_STYLE_TEXT_DECORATION_STYLE_SOLID;
break;
case IntID::IMESelectedRawTextUnderlineStyle:
case IntID::IMESelectedConvertedTextUnderline:
aResult = NS_STYLE_TEXT_DECORATION_STYLE_NONE;
break;
case IntID::SpellCheckerUnderlineStyle:
aResult = NS_STYLE_TEXT_DECORATION_STYLE_WAVY;
break;
case IntID::MenuBarDrag:
EnsureInit();
aResult = mSystemTheme.mMenuSupportsDrag;
break;
case IntID::ScrollbarButtonAutoRepeatBehavior:
aResult = 1;
break;
case IntID::SwipeAnimationEnabled:
aResult = 0;
break;
case IntID::ContextMenuOffsetVertical:
case IntID::ContextMenuOffsetHorizontal:
aResult = 2;
break;
case IntID::GTKCSDAvailable:
aResult = sCSDAvailable;
break;
case IntID::GTKCSDMaximizeButton:
EnsureInit();
aResult = mCSDMaximizeButton;
break;
case IntID::GTKCSDMinimizeButton:
EnsureInit();
aResult = mCSDMinimizeButton;
break;
case IntID::GTKCSDCloseButton:
EnsureInit();
aResult = mCSDCloseButton;
break;
case IntID::GTKCSDReversedPlacement:
EnsureInit();
aResult = mCSDReversedPlacement;
break;
case IntID::PrefersReducedMotion: {
aResult = mPrefersReducedMotion;
break;
}
case IntID::SystemUsesDarkTheme: {
EnsureInit();
aResult = mSystemTheme.mIsDark;
break;
}
case IntID::GTKCSDMaximizeButtonPosition:
aResult = mCSDMaximizeButtonPosition;
break;
case IntID::GTKCSDMinimizeButtonPosition:
aResult = mCSDMinimizeButtonPosition;
break;
case IntID::GTKCSDCloseButtonPosition:
aResult = mCSDCloseButtonPosition;
break;
case IntID::UseAccessibilityTheme: {
EnsureInit();
aResult = mSystemTheme.mHighContrast;
break;
}
case IntID::TitlebarRadius: {
EnsureInit();
aResult = EffectiveTheme().mTitlebarRadius;
break;
}
case IntID::GtkMenuRadius: {
EnsureInit();
aResult = EffectiveTheme().mMenuRadius;
break;
}
case IntID::AllowOverlayScrollbarsOverlap: {
aResult = 1;
break;
}
case IntID::ScrollbarFadeBeginDelay: {
aResult = 1000;
break;
}
case IntID::ScrollbarFadeDuration: {
aResult = 400;
break;
}
case IntID::ScrollbarDisplayOnMouseMove: {
aResult = 1;
break;
}
case IntID::TouchDeviceSupportPresent:
aResult = widget::WidgetUtilsGTK::IsTouchDeviceSupportPresent() ? 1 : 0;
break;
default:
aResult = 0;
res = NS_ERROR_FAILURE;
}
return res;
}
nsresult nsLookAndFeel::NativeGetFloat(FloatID aID, float& aResult) {
nsresult rv = NS_OK;
switch (aID) {
case FloatID::IMEUnderlineRelativeSize:
aResult = 1.0f;
break;
case FloatID::SpellCheckerUnderlineRelativeSize:
aResult = 1.0f;
break;
case FloatID::CaretAspectRatio:
EnsureInit();
aResult = mSystemTheme.mCaretRatio;
break;
case FloatID::TextScaleFactor:
aResult = gfxPlatformGtk::GetFontScaleFactor();
break;
default:
aResult = -1.0;
rv = NS_ERROR_FAILURE;
}
return rv;
}
static void GetSystemFontInfo(GtkStyleContext* aStyle, nsString* aFontName,
gfxFontStyle* aFontStyle) {
aFontStyle->style = FontSlantStyle::Normal();
// As in
// https://git.gnome.org/browse/gtk+/tree/gtk/gtkwidget.c?h=3.22.19#n10333
PangoFontDescription* desc;
gtk_style_context_get(aStyle, gtk_style_context_get_state(aStyle), "font",
&desc, nullptr);
aFontStyle->systemFont = true;
constexpr auto quote = u"\""_ns;
NS_ConvertUTF8toUTF16 family(pango_font_description_get_family(desc));
*aFontName = quote + family + quote;
aFontStyle->weight = FontWeight(pango_font_description_get_weight(desc));
// FIXME: Set aFontStyle->stretch correctly!
aFontStyle->stretch = FontStretch::Normal();
float size = float(pango_font_description_get_size(desc)) / PANGO_SCALE;
// |size| is now either pixels or pango-points (not Mozilla-points!)
if (!pango_font_description_get_size_is_absolute(desc)) {
// |size| is in pango-points, so convert to pixels.
size *= float(gfxPlatformGtk::GetFontScaleDPI()) / POINTS_PER_INCH_FLOAT;
}
// |size| is now pixels but not scaled for the hidpi displays,
aFontStyle->size = size;
pango_font_description_free(desc);
}
bool nsLookAndFeel::NativeGetFont(FontID aID, nsString& aFontName,
gfxFontStyle& aFontStyle) {
return mSystemTheme.GetFont(aID, aFontName, aFontStyle);
}
bool nsLookAndFeel::PerThemeData::GetFont(FontID aID, nsString& aFontName,
gfxFontStyle& aFontStyle) const {
switch (aID) {
case FontID::Menu: // css2
case FontID::MozPullDownMenu: // css3
aFontName = mMenuFontName;
aFontStyle = mMenuFontStyle;
break;
case FontID::MozField: // css3
case FontID::MozList: // css3
aFontName = mFieldFontName;
aFontStyle = mFieldFontStyle;
break;
case FontID::MozButton: // css3
aFontName = mButtonFontName;
aFontStyle = mButtonFontStyle;
break;
case FontID::Caption: // css2
case FontID::Icon: // css2
case FontID::MessageBox: // css2
case FontID::SmallCaption: // css2
case FontID::StatusBar: // css2
case FontID::MozWindow: // css3
case FontID::MozDocument: // css3
case FontID::MozWorkspace: // css3
case FontID::MozDesktop: // css3
case FontID::MozInfo: // css3
case FontID::MozDialog: // css3
default:
aFontName = mDefaultFontName;
aFontStyle = mDefaultFontStyle;
break;
}
// Scale the font for the current monitor
double scaleFactor = StaticPrefs::layout_css_devPixelsPerPx();
if (scaleFactor > 0) {
aFontStyle.size *=
widget::ScreenHelperGTK::GetGTKMonitorScaleFactor() / scaleFactor;
} else {
// Convert gdk pixels to CSS pixels.
aFontStyle.size /= gfxPlatformGtk::GetFontScaleFactor();
}
return true;
}
// Check color contrast according to
// https://www.w3.org/TR/AERT/#color-contrast
static bool HasGoodContrastVisibility(GdkRGBA& aColor1, GdkRGBA& aColor2) {
int32_t luminosityDifference = NS_LUMINOSITY_DIFFERENCE(
GDK_RGBA_TO_NS_RGBA(aColor1), GDK_RGBA_TO_NS_RGBA(aColor2));
if (luminosityDifference < NS_SUFFICIENT_LUMINOSITY_DIFFERENCE) {
return false;
}
double colorDifference = std::abs(aColor1.red - aColor2.red) +
std::abs(aColor1.green - aColor2.green) +
std::abs(aColor1.blue - aColor2.blue);
return (colorDifference * 255.0 > 500.0);
}
// Check if the foreground/background colors match with default white/black
// html page colors.
static bool IsGtkThemeCompatibleWithHTMLColors() {
GdkRGBA white = {1.0, 1.0, 1.0};
GdkRGBA black = {0.0, 0.0, 0.0};
GtkStyleContext* style = GetStyleContext(MOZ_GTK_WINDOW);
GdkRGBA textColor;
gtk_style_context_get_color(style, GTK_STATE_FLAG_NORMAL, &textColor);
// Theme text color and default white html page background
if (!HasGoodContrastVisibility(textColor, white)) {
return false;
}
GdkRGBA backgroundColor;
gtk_style_context_get_background_color(style, GTK_STATE_FLAG_NORMAL,
&backgroundColor);
// Theme background color and default white html page background
if (HasGoodContrastVisibility(backgroundColor, white)) {
return false;
}
// Theme background color and default black text color
return HasGoodContrastVisibility(backgroundColor, black);
}
static nsCString GetGtkSettingsStringKey(const char* aKey) {
MOZ_DIAGNOSTIC_ASSERT(NS_IsMainThread());
nsCString ret;
GtkSettings* settings = gtk_settings_get_default();
char* value = nullptr;
g_object_get(settings, aKey, &value, nullptr);
if (value) {
ret.Assign(value);
g_free(value);
}
return ret;
}
static nsCString GetGtkTheme() {
return GetGtkSettingsStringKey("gtk-theme-name");
}
static bool GetPreferDarkTheme() {
GtkSettings* settings = gtk_settings_get_default();
gboolean preferDarkTheme = FALSE;
g_object_get(settings, "gtk-application-prefer-dark-theme", &preferDarkTheme,
nullptr);
return preferDarkTheme == TRUE;
}
// It seems GTK doesn't have an API to query if the current theme is "light" or
// "dark", so we synthesize it from the CSS2 Window/WindowText colors instead,
// by comparing their luminosity.
static bool GetThemeIsDark() {
GdkRGBA bg, fg;
GtkStyleContext* style = GetStyleContext(MOZ_GTK_WINDOW);
gtk_style_context_get_background_color(style, GTK_STATE_FLAG_NORMAL, &bg);
gtk_style_context_get_color(style, GTK_STATE_FLAG_NORMAL, &fg);
return RelativeLuminanceUtils::Compute(GDK_RGBA_TO_NS_RGBA(bg)) <
RelativeLuminanceUtils::Compute(GDK_RGBA_TO_NS_RGBA(fg));
}
void nsLookAndFeel::ConfigureTheme(const LookAndFeelTheme& aTheme) {
MOZ_ASSERT(XRE_IsContentProcess());
GtkSettings* settings = gtk_settings_get_default();
g_object_set(settings, "gtk-theme-name", aTheme.themeName().get(),
"gtk-application-prefer-dark-theme",
aTheme.preferDarkTheme() ? TRUE : FALSE, nullptr);
}
void nsLookAndFeel::RestoreSystemTheme() {
LOGLNF("RestoreSystemTheme(%s, %d)\n", mSystemTheme.mName.get(),
mSystemTheme.mPreferDarkTheme);
// Available on Gtk 3.20+.
static auto sGtkSettingsResetProperty =
(void (*)(GtkSettings*, const gchar*))dlsym(
RTLD_DEFAULT, "gtk_settings_reset_property");
GtkSettings* settings = gtk_settings_get_default();
if (sGtkSettingsResetProperty) {
sGtkSettingsResetProperty(settings, "gtk-theme-name");
sGtkSettingsResetProperty(settings, "gtk-application-prefer-dark-theme");
} else {
g_object_set(settings, "gtk-theme-name", mSystemTheme.mName.get(),
"gtk-application-prefer-dark-theme",
mSystemTheme.mPreferDarkTheme, nullptr);
}
moz_gtk_refresh();
}
template <typename Callback>
void nsLookAndFeel::WithAltThemeConfigured(const Callback& aFn) {
GtkSettings* settings = gtk_settings_get_default();
bool fellBackToDefaultTheme = false;
// Try to select the opposite variant of the current theme first...
LOGLNF(" toggling gtk-application-prefer-dark-theme\n");
g_object_set(settings, "gtk-application-prefer-dark-theme",
!mSystemTheme.mIsDark, nullptr);
moz_gtk_refresh();
// Toggling gtk-application-prefer-dark-theme is not enough generally to
// switch from dark to light theme. If the theme didn't change, and we have
// a dark theme, try to first remove -Dark{,er,est} from the theme name to
// find the light variant.
if (mSystemTheme.mIsDark && mSystemTheme.mIsDark == GetThemeIsDark()) {
nsCString potentialLightThemeName = mSystemTheme.mName;
// clang-format off
constexpr nsLiteralCString kSubstringsToRemove[] = {
"-darkest"_ns, "-darker"_ns, "-dark"_ns,
"-Darkest"_ns, "-Darker"_ns, "-Dark"_ns,
"_darkest"_ns, "_darker"_ns, "_dark"_ns,
"_Darkest"_ns, "_Darker"_ns, "_Dark"_ns,
};
// clang-format on
bool found = false;
for (auto& s : kSubstringsToRemove) {
potentialLightThemeName = mSystemTheme.mName;
potentialLightThemeName.ReplaceSubstring(s, ""_ns);
if (potentialLightThemeName.Length() != mSystemTheme.mName.Length()) {
found = true;
break;
}
}
if (found) {
g_object_set(settings, "gtk-theme-name", potentialLightThemeName.get(),
nullptr);
moz_gtk_refresh();
}
}
if (mSystemTheme.mIsDark == GetThemeIsDark()) {
// If the theme still didn't change enough, fall back to either Adwaita or
// Adwaita-dark.
g_object_set(settings, "gtk-theme-name",
mSystemTheme.mIsDark ? "Adwaita" : "Adwaita-dark", nullptr);
moz_gtk_refresh();
fellBackToDefaultTheme = true;
}
aFn(fellBackToDefaultTheme);
// Restore the system theme.
RestoreSystemTheme();
}
static bool AnyColorChannelIsDifferent(nscolor aColor) {
return NS_GET_R(aColor) != NS_GET_G(aColor) ||
NS_GET_R(aColor) != NS_GET_B(aColor);
}
void nsLookAndFeel::InitializeAltTheme() {
WithAltThemeConfigured([&](bool aFellBackToDefaultTheme) {
mAltTheme.Init();
// Some of the alt theme colors we can grab from the system theme, if we
// fell back to the default light / dark themes.
if (aFellBackToDefaultTheme) {
if (StaticPrefs::widget_gtk_alt_theme_selection()) {
mAltTheme.mTextSelectedText = mSystemTheme.mTextSelectedText;
mAltTheme.mTextSelectedBackground =
mSystemTheme.mTextSelectedBackground;
}
if (StaticPrefs::widget_gtk_alt_theme_scrollbar()) {
mAltTheme.mThemedScrollbar = mSystemTheme.mThemedScrollbar;
mAltTheme.mThemedScrollbarInactive =
mSystemTheme.mThemedScrollbarInactive;
mAltTheme.mThemedScrollbarThumb = mSystemTheme.mThemedScrollbarThumb;
mAltTheme.mThemedScrollbarThumbHover =
mSystemTheme.mThemedScrollbarThumbHover;
mAltTheme.mThemedScrollbarThumbInactive =
mSystemTheme.mThemedScrollbarThumbInactive;
}
if (StaticPrefs::widget_gtk_alt_theme_scrollbar_active()) {
mAltTheme.mThemedScrollbarThumbActive =
mSystemTheme.mThemedScrollbarThumbActive;
}
if (StaticPrefs::widget_gtk_alt_theme_selection()) {
mAltTheme.mAccentColor = mSystemTheme.mAccentColor;
mAltTheme.mAccentColorForeground = mSystemTheme.mAccentColorForeground;
}
}
});
}
void nsLookAndFeel::EnsureInit() {
if (mInitialized) {
return;
}
LOGLNF("nsLookAndFeel::EnsureInit");
AutoRestore<bool> restoreIgnoreSettings(sIgnoreChangedSettings);
sIgnoreChangedSettings = true;
// Gtk manages a screen's CSS in the settings object so we
// ask Gtk to create it explicitly. Otherwise we may end up
// with wrong color theme, see Bug 972382
GtkSettings* settings = gtk_settings_get_default();
if (MOZ_UNLIKELY(!settings)) {
NS_WARNING("EnsureInit: No settings");
return;
}
mInitialized = true;
if (mSystemThemeOverridden) {
// Our current theme may be different from the system theme if we're
// matching the firefox theme. Make sure to restore the original system
// theme.
RestoreSystemTheme();
mSystemThemeOverridden = false;
}
// gtk does non threadsafe refcounting
MOZ_ASSERT(NS_IsMainThread());
gboolean enableAnimations = false;
g_object_get(settings, "gtk-enable-animations", &enableAnimations, nullptr);
mPrefersReducedMotion = !enableAnimations;
gint blink_time = 0; // In milliseconds
gint blink_timeout = 0; // in seconds
gboolean blink;
g_object_get(settings, "gtk-cursor-blink-time", &blink_time,
"gtk-cursor-blink-timeout", &blink_timeout, "gtk-cursor-blink",
&blink, nullptr);
// From
// https://docs.gtk.org/gtk3/property.Settings.gtk-cursor-blink-timeout.html:
//
// Setting this to zero has the same effect as setting
// GtkSettings:gtk-cursor-blink to FALSE.
//
mCaretBlinkTime = blink && blink_timeout ? (int32_t)blink_time : 0;
if (mCaretBlinkTime) {
// blink_time * 2 because blink count is a full blink cycle.
mCaretBlinkCount =
std::max(1, int32_t(std::ceil(float(blink_timeout * 1000) /
(float(blink_time) * 2.0f))));
} else {
mCaretBlinkCount = -1;
}
mSystemTheme.Init();
mCSDCloseButton = false;
mCSDMinimizeButton = false;
mCSDMaximizeButton = false;
mCSDCloseButtonPosition = 0;
mCSDMinimizeButtonPosition = 0;
mCSDMaximizeButtonPosition = 0;
// We need to initialize whole CSD config explicitly because it's queried
// as -moz-gtk* media features.
ButtonLayout buttonLayout[TOOLBAR_BUTTONS];
size_t activeButtons =
GetGtkHeaderBarButtonLayout(Span(buttonLayout), &mCSDReversedPlacement);
for (size_t i = 0; i < activeButtons; i++) {
// We check if a button is represented on the right side of the tabbar.
// Then we assign it a value from 3 to 5, instead of 0 to 2 when it is on
// the left side.
const ButtonLayout& layout = buttonLayout[i];
int32_t* pos = nullptr;
switch (layout.mType) {
case MOZ_GTK_HEADER_BAR_BUTTON_MINIMIZE:
mCSDMinimizeButton = true;
pos = &mCSDMinimizeButtonPosition;
break;
case MOZ_GTK_HEADER_BAR_BUTTON_MAXIMIZE:
mCSDMaximizeButton = true;
pos = &mCSDMaximizeButtonPosition;
break;
case MOZ_GTK_HEADER_BAR_BUTTON_CLOSE:
mCSDCloseButton = true;
pos = &mCSDCloseButtonPosition;
break;
default:
break;
}
if (pos) {
*pos = i;
}
}
// Switching themes on startup has some performance cost, so until we use the
// dark colors, keep it pref'd off.
if (mSystemTheme.mIsDark || StaticPrefs::widget_gtk_alt_theme_dark()) {
InitializeAltTheme();
} else {
mAltTheme = mSystemTheme;
}
LOGLNF("System Theme: %s. Alt Theme: %s\n", mSystemTheme.mName.get(),
mAltTheme.mName.get());
MatchFirefoxThemeIfNeeded();
RecordTelemetry();
}
bool nsLookAndFeel::MatchFirefoxThemeIfNeeded() {
AutoRestore<bool> restoreIgnoreSettings(sIgnoreChangedSettings);
sIgnoreChangedSettings = true;
const bool matchesSystem = [&] {
// NOTE: We can't call ColorSchemeForChrome directly because this might run
// while we're computing it.
switch (ColorSchemeSettingForChrome()) {
case ChromeColorSchemeSetting::Light:
return !mSystemTheme.mIsDark;
case ChromeColorSchemeSetting::Dark:
return mSystemTheme.mIsDark;
case ChromeColorSchemeSetting::System:
break;
};
return true;
}();
const bool usingSystem = !mSystemThemeOverridden;
LOGLNF("MatchFirefoxThemeIfNeeded(matchesSystem=%d, usingSystem=%d)\n",
matchesSystem, usingSystem);
if (usingSystem == matchesSystem) {
return false;
}
mSystemThemeOverridden = !matchesSystem;
if (matchesSystem) {
RestoreSystemTheme();
} else {
LOGLNF("Setting theme %s, %d\n", mAltTheme.mName.get(),
mAltTheme.mPreferDarkTheme);
GtkSettings* settings = gtk_settings_get_default();
if (mSystemTheme.mName == mAltTheme.mName) {
// Prefer setting only gtk-application-prefer-dark-theme, so we can still
// get notified from notify::gtk-theme-name if the user changes the theme.
g_object_set(settings, "gtk-application-prefer-dark-theme",
mAltTheme.mPreferDarkTheme, nullptr);
} else {
g_object_set(settings, "gtk-theme-name", mAltTheme.mName.get(),
"gtk-application-prefer-dark-theme",
mAltTheme.mPreferDarkTheme, nullptr);
}
moz_gtk_refresh();
}
return true;
}
void nsLookAndFeel::GetGtkContentTheme(LookAndFeelTheme& aTheme) {
if (NS_SUCCEEDED(Preferences::GetCString("widget.content.gtk-theme-override",
aTheme.themeName()))) {
return;
}
auto& theme = StaticPrefs::widget_content_allow_gtk_dark_theme()
? mSystemTheme
: LightTheme();
aTheme.preferDarkTheme() = theme.mPreferDarkTheme;
aTheme.themeName() = theme.mName;
}
static nscolor GetBackgroundColor(
GtkStyleContext* aStyle, nscolor aForForegroundColor,
GtkStateFlags aState = GTK_STATE_FLAG_NORMAL) {
GdkRGBA gdkColor;
gtk_style_context_get_background_color(aStyle, aState, &gdkColor);
nscolor color = GDK_RGBA_TO_NS_RGBA(gdkColor);
if (NS_GET_A(color)) {
return color;
}
// Try to synthesize a color from a background-image.
GValue value = G_VALUE_INIT;
gtk_style_context_get_property(aStyle, "background-image", aState, &value);
auto cleanup = MakeScopeExit([&] { g_value_unset(&value); });
if (GetColorFromImagePattern(&value, &color)) {
return color;
}
{
GdkRGBA light, dark;
if (GetGradientColors(&value, &light, &dark)) {
nscolor l = GDK_RGBA_TO_NS_RGBA(light);
nscolor d = GDK_RGBA_TO_NS_RGBA(dark);
// Return the one with more contrast.
// TODO(emilio): This could do interpolation or what not but seems
// overkill.
return NS_LUMINOSITY_DIFFERENCE(l, aForForegroundColor) >
NS_LUMINOSITY_DIFFERENCE(d, aForForegroundColor)
? l
: d;
}
}
return NS_TRANSPARENT;
}
static int32_t 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);
auto unset = MakeScopeExit([&] { g_value_unset(&value); });
auto type = G_VALUE_TYPE(&value);
if (type == G_TYPE_INT) {
return g_value_get_int(&value);
}
NS_WARNING(nsPrintfCString("Unknown value type %lu for titlebar radius", type)
.get());
return 0;
}
void nsLookAndFeel::PerThemeData::Init() {
mName = GetGtkTheme();
GtkStyleContext* style;
mHighContrast = StaticPrefs::widget_content_gtk_high_contrast_enabled() &&
mName.Find("HighContrast"_ns) >= 0;
mPreferDarkTheme = GetPreferDarkTheme();
mIsDark = GetThemeIsDark();
mCompatibleWithHTMLLightColors =
!mIsDark && IsGtkThemeCompatibleWithHTMLColors();
GdkRGBA color;
// Some themes style the <trough>, while others style the <scrollbar>
// itself, so we look at both and compose the colors.
style = GetStyleContext(MOZ_GTK_SCROLLBAR_VERTICAL);
gtk_style_context_get_background_color(style, GTK_STATE_FLAG_NORMAL, &color);
mThemedScrollbar = GDK_RGBA_TO_NS_RGBA(color);
gtk_style_context_get_background_color(style, GTK_STATE_FLAG_BACKDROP,
&color);
mThemedScrollbarInactive = GDK_RGBA_TO_NS_RGBA(color);
style = GetStyleContext(MOZ_GTK_SCROLLBAR_TROUGH_VERTICAL);
gtk_style_context_get_background_color(style, GTK_STATE_FLAG_NORMAL, &color);
mThemedScrollbar =
NS_ComposeColors(mThemedScrollbar, GDK_RGBA_TO_NS_RGBA(color));
gtk_style_context_get_background_color(style, GTK_STATE_FLAG_BACKDROP,
&color);
mThemedScrollbarInactive =
NS_ComposeColors(mThemedScrollbarInactive, GDK_RGBA_TO_NS_RGBA(color));
mMozScrollbar = mThemedScrollbar;
style = GetStyleContext(MOZ_GTK_SCROLLBAR_THUMB_VERTICAL);
gtk_style_context_get_background_color(style, GTK_STATE_FLAG_NORMAL, &color);
mThemedScrollbarThumb = GDK_RGBA_TO_NS_RGBA(color);
gtk_style_context_get_background_color(style, GTK_STATE_FLAG_PRELIGHT,
&color);
mThemedScrollbarThumbHover = GDK_RGBA_TO_NS_RGBA(color);
gtk_style_context_get_background_color(
style, GtkStateFlags(GTK_STATE_FLAG_PRELIGHT | GTK_STATE_FLAG_ACTIVE),
&color);
mThemedScrollbarThumbActive = GDK_RGBA_TO_NS_RGBA(color);
gtk_style_context_get_background_color(style, GTK_STATE_FLAG_BACKDROP,
&color);
mThemedScrollbarThumbInactive = GDK_RGBA_TO_NS_RGBA(color);
// Make sure that the thumb is visible, at least.
const bool fallbackToUnthemedColors = [&] {
if (!ShouldHonorThemeScrollbarColors()) {
return true;
}
// If any of the scrollbar thumb colors are fully transparent, fall back to
// non-native ones.
if (!NS_GET_A(mThemedScrollbarThumb) ||
!NS_GET_A(mThemedScrollbarThumbHover) ||
!NS_GET_A(mThemedScrollbarThumbActive)) {
return true;
}
// If the thumb and track are the same color and opaque, fall back to
// non-native colors as well.
if (mThemedScrollbar == mThemedScrollbarThumb &&
NS_GET_A(mThemedScrollbar) == 0xff) {
return true;
}
return false;
}();
if (fallbackToUnthemedColors) {
mMozScrollbar = mThemedScrollbar = widget::sScrollbarColor.ToABGR();
mThemedScrollbarInactive = widget::sScrollbarColor.ToABGR();
mThemedScrollbarThumb = widget::sScrollbarThumbColor.ToABGR();
mThemedScrollbarThumbHover = ThemeColors::AdjustUnthemedScrollbarThumbColor(
mThemedScrollbarThumb, NS_EVENT_STATE_HOVER);
mThemedScrollbarThumbActive =
ThemeColors::AdjustUnthemedScrollbarThumbColor(mThemedScrollbarThumb,
NS_EVENT_STATE_ACTIVE);
mThemedScrollbarThumbInactive = mThemedScrollbarThumb;
}
// The label is not added to a parent widget, but shared for constructing
// different style contexts. The node hierarchy is constructed only on
// the label style context.
GtkWidget* labelWidget = gtk_label_new("M");
g_object_ref_sink(labelWidget);
// Window colors
style = GetStyleContext(MOZ_GTK_WINDOW);
gtk_style_context_get_color(style, GTK_STATE_FLAG_NORMAL, &color);
mMozWindowText = GDK_RGBA_TO_NS_RGBA(color);
mMozWindowBackground = GetBackgroundColor(style, mMozWindowText);
gtk_style_context_get_border_color(style, GTK_STATE_FLAG_NORMAL, &color);
mMozWindowActiveBorder = GDK_RGBA_TO_NS_RGBA(color);
gtk_style_context_get_border_color(style, GTK_STATE_FLAG_INSENSITIVE, &color);
mMozWindowInactiveBorder = GDK_RGBA_TO_NS_RGBA(color);
style = GetStyleContext(MOZ_GTK_WINDOW_CONTAINER);
{
GtkStyleContext* labelStyle = CreateStyleForWidget(labelWidget, style);
GetSystemFontInfo(labelStyle, &mDefaultFontName, &mDefaultFontStyle);
g_object_unref(labelStyle);
}
// tooltip foreground and background
style = GetStyleContext(MOZ_GTK_TOOLTIP_BOX_LABEL);
gtk_style_context_get_color(style, GTK_STATE_FLAG_NORMAL, &color);
mInfoText = GDK_RGBA_TO_NS_RGBA(color);
style = GetStyleContext(MOZ_GTK_TOOLTIP);
mInfoBackground = GetBackgroundColor(style, mInfoText);
style = GetStyleContext(MOZ_GTK_MENUITEM);
{
GtkStyleContext* accelStyle =
CreateStyleForWidget(gtk_accel_label_new("M"), style);
GetSystemFontInfo(accelStyle, &mMenuFontName, &mMenuFontStyle);
gtk_style_context_get_color(accelStyle, GTK_STATE_FLAG_NORMAL, &color);
mMenuText = GDK_RGBA_TO_NS_RGBA(color);
gtk_style_context_get_color(accelStyle, GTK_STATE_FLAG_INSENSITIVE, &color);
mMenuTextInactive = GDK_RGBA_TO_NS_RGBA(color);
g_object_unref(accelStyle);
}
style = GetStyleContext(MOZ_GTK_HEADER_BAR);
{
gtk_style_context_get_color(style, GTK_STATE_FLAG_NORMAL, &color);
mTitlebarText = GDK_RGBA_TO_NS_RGBA(color);
mTitlebarBackground = GetBackgroundColor(style, mTitlebarText);
gtk_style_context_get_color(style, GTK_STATE_FLAG_BACKDROP, &color);
mTitlebarInactiveText = GDK_RGBA_TO_NS_RGBA(color);
mTitlebarInactiveBackground =
GetBackgroundColor(style, mTitlebarText, GTK_STATE_FLAG_BACKDROP);
mTitlebarRadius = IsSolidCSDStyleUsed() ? 0 : GetBorderRadius(style);
}
style = GetStyleContext(MOZ_GTK_MENUPOPUP);
mMenuBackground = [&] {
nscolor color = GetBackgroundColor(style, mMenuText);
if (NS_GET_A(color)) {
return color;
}
// Some themes only style menupopups with the backdrop pseudo-class. Since a
// context / popup menu always seems to match that, try that before giving
// up.
color = GetBackgroundColor(style, mMenuText, GTK_STATE_FLAG_BACKDROP);
if (NS_GET_A(color)) {
return color;
}
// If we get here we couldn't figure out the right color to use. Rather than
// falling back to transparent, fall back to the window background.
NS_WARNING(
"Couldn't find menu background color, falling back to window "
"background");
return mMozWindowBackground;
}();
mMenuRadius = 0;
if (!IsSolidCSDStyleUsed()) {
mMenuRadius = GetBorderRadius(style);
if (!mMenuRadius) {
mMenuRadius =
GetBorderRadius(GetStyleContext(MOZ_GTK_MENUPOPUP_DECORATION));
}
}
style = GetStyleContext(MOZ_GTK_MENUITEM);
gtk_style_context_get_color(style, GTK_STATE_FLAG_PRELIGHT, &color);
mMenuHoverText = GDK_RGBA_TO_NS_RGBA(color);
mMenuHover =
GetBackgroundColor(style, mMenuHoverText, GTK_STATE_FLAG_PRELIGHT);
GtkWidget* parent = gtk_fixed_new();
GtkWidget* window = gtk_window_new(GTK_WINDOW_POPUP);
GtkWidget* treeView = gtk_tree_view_new();
GtkWidget* linkButton = gtk_link_button_new("http://example.com/");
GtkWidget* menuBar = gtk_menu_bar_new();
GtkWidget* menuBarItem = gtk_menu_item_new();
GtkWidget* entry = gtk_entry_new();
GtkWidget* textView = gtk_text_view_new();
gtk_container_add(GTK_CONTAINER(parent), treeView);
gtk_container_add(GTK_CONTAINER(parent), linkButton);
gtk_container_add(GTK_CONTAINER(parent), menuBar);
gtk_menu_shell_append(GTK_MENU_SHELL(menuBar), menuBarItem);
gtk_container_add(GTK_CONTAINER(window), parent);
gtk_container_add(GTK_CONTAINER(parent), entry);
gtk_container_add(GTK_CONTAINER(parent), textView);
// Text colors
GdkRGBA bgColor;
// If the text window background is translucent, then the background of
// the textview root node is visible.
style = GetStyleContext(MOZ_GTK_TEXT_VIEW);
gtk_style_context_get_background_color(style, GTK_STATE_FLAG_NORMAL,
&bgColor);
style = GetStyleContext(MOZ_GTK_TEXT_VIEW_TEXT);
gtk_style_context_get_background_color(style, GTK_STATE_FLAG_NORMAL, &color);
ApplyColorOver(color, &bgColor);
mFieldBackground = GDK_RGBA_TO_NS_RGBA(bgColor);
gtk_style_context_get_color(style, GTK_STATE_FLAG_NORMAL, &color);
mFieldText = GDK_RGBA_TO_NS_RGBA(color);
// Selected text and background
{
GtkStyleContext* selectionStyle =
GetStyleContext(MOZ_GTK_TEXT_VIEW_TEXT_SELECTION);
auto GrabSelectionColors = [&](GtkStyleContext* style) {
gtk_style_context_get_background_color(
style,
static_cast<GtkStateFlags>(GTK_STATE_FLAG_FOCUSED |
GTK_STATE_FLAG_SELECTED),
&color);
mTextSelectedBackground = GDK_RGBA_TO_NS_RGBA(color);
gtk_style_context_get_color(
style,
static_cast<GtkStateFlags>(GTK_STATE_FLAG_FOCUSED |
GTK_STATE_FLAG_SELECTED),
&color);
mTextSelectedText = GDK_RGBA_TO_NS_RGBA(color);
};
GrabSelectionColors(selectionStyle);
if (mTextSelectedBackground == mTextSelectedText) {
// Some old distros/themes don't properly use the .selection style, so
// fall back to the regular text view style.
GrabSelectionColors(style);
}
// Default accent color is the selection background / foreground colors.
mAccentColor = mTextSelectedBackground;
mAccentColorForeground = mTextSelectedText;
// But prefer named colors, as those are more general purpose than the
// actual selection style, which might e.g. be too-transparent.
//
// NOTE(emilio): It's unclear which one of the theme_selected_* or the
// selected_* pairs should we prefer, in all themes that define both that
// I've found, they're always the same.
{
GdkRGBA bg, fg;
const bool found =
(gtk_style_context_lookup_color(style, "selected_bg_color", &bg) &&
gtk_style_context_lookup_color(style, "selected_fg_color", &fg)) ||
(gtk_style_context_lookup_color(style, "theme_selected_bg_color",
&bg) &&
gtk_style_context_lookup_color(style, "theme_selected_fg_color",
&fg));
if (found) {
mAccentColor = GDK_RGBA_TO_NS_RGBA(bg);
mAccentColorForeground = GDK_RGBA_TO_NS_RGBA(fg);
// If the accent colors are semi-transparent and the theme provides a
// background color, blend with them to get the "final" color, see
// bug 1717077.
if (NS_GET_A(mAccentColor) != 255 &&
(gtk_style_context_lookup_color(style, "bg_color", &bg) ||
gtk_style_context_lookup_color(style, "theme_bg_color", &bg))) {
mAccentColor =
NS_ComposeColors(GDK_RGBA_TO_NS_RGBA(bg), mAccentColor);
}
// A semi-transparent foreground color would be kinda silly, but is done
// for symmetry.
if (NS_GET_A(mAccentColorForeground) != 255 &&
(gtk_style_context_lookup_color(style, "fg_color", &fg) ||
gtk_style_context_lookup_color(style, "theme_fg_color", &fg))) {
mAccentColorForeground =
NS_ComposeColors(GDK_RGBA_TO_NS_RGBA(fg), mAccentColorForeground);
}
}
}
// Accent is the darker one, unless the foreground isn't really a color (is
// all white / black / gray) and the background is, in which case we stick
// to what we have.
if (RelativeLuminanceUtils::Compute(mAccentColor) >
RelativeLuminanceUtils::Compute(mAccentColorForeground) &&
(AnyColorChannelIsDifferent(mAccentColorForeground) ||
!AnyColorChannelIsDifferent(mAccentColor))) {
std::swap(mAccentColor, mAccentColorForeground);
}
// Blend with white, ensuring the color is opaque, so that the UI doesn't
// have to care about alpha.
mAccentColorForeground =
NS_ComposeColors(NS_RGB(0xff, 0xff, 0xff), mAccentColorForeground);
mAccentColor = NS_ComposeColors(NS_RGB(0xff, 0xff, 0xff), mAccentColor);
}
// Button text color
style = GetStyleContext(MOZ_GTK_BUTTON);
{
GtkStyleContext* labelStyle = CreateStyleForWidget(labelWidget, style);
GetSystemFontInfo(labelStyle, &mButtonFontName, &mButtonFontStyle);
g_object_unref(labelStyle);
}
gtk_style_context_get_border_color(style, GTK_STATE_FLAG_NORMAL, &color);
mButtonDefault = GDK_RGBA_TO_NS_RGBA(color);
gtk_style_context_get_color(style, GTK_STATE_FLAG_NORMAL, &color);
mButtonText = GDK_RGBA_TO_NS_RGBA(color);
gtk_style_context_get_color(style, GTK_STATE_FLAG_PRELIGHT, &color);
mButtonHoverText = GDK_RGBA_TO_NS_RGBA(color);
gtk_style_context_get_color(style, GTK_STATE_FLAG_ACTIVE, &color);
mButtonActiveText = GDK_RGBA_TO_NS_RGBA(color);
gtk_style_context_get_background_color(style, GTK_STATE_FLAG_PRELIGHT,
&color);
mButtonHoverFace = GDK_RGBA_TO_NS_RGBA(color);
if (!NS_GET_A(mButtonHoverFace)) {
mButtonHoverFace = mMozWindowBackground;
}
// Combobox text color
style = GetStyleContext(MOZ_GTK_COMBOBOX_ENTRY_TEXTAREA);
gtk_style_context_get_color(style, GTK_STATE_FLAG_NORMAL, &color);
mComboBoxText = GDK_RGBA_TO_NS_RGBA(color);
// Menubar text and hover text colors
style = GetStyleContext(MOZ_GTK_MENUBARITEM);
gtk_style_context_get_color(style, GTK_STATE_FLAG_NORMAL, &color);
mMenuBarText = GDK_RGBA_TO_NS_RGBA(color);
gtk_style_context_get_color(style, GTK_STATE_FLAG_PRELIGHT, &color);
mMenuBarHoverText = GDK_RGBA_TO_NS_RGBA(color);
// GTK's guide to fancy odd row background colors:
// 1) Check if a theme explicitly defines an odd row color
// 2) If not, check if it defines an even row color, and darken it
// slightly by a hardcoded value (gtkstyle.c)
// 3) If neither are defined, take the base background color and
// darken that by a hardcoded value
style = GetStyleContext(MOZ_GTK_TREEVIEW);
// Get odd row background color
gtk_style_context_save(style);
gtk_style_context_add_region(style, GTK_STYLE_REGION_ROW, GTK_REGION_ODD);
gtk_style_context_get_background_color(style, GTK_STATE_FLAG_NORMAL, &color);
mOddCellBackground = GDK_RGBA_TO_NS_RGBA(color);
gtk_style_context_restore(style);
// Column header colors
style = GetStyleContext(MOZ_GTK_TREE_HEADER_CELL);
gtk_style_context_get_color(style, GTK_STATE_FLAG_NORMAL, &color);
mMozColHeaderText = GDK_RGBA_TO_NS_RGBA(color);
gtk_style_context_get_color(style, GTK_STATE_FLAG_PRELIGHT, &color);
mMozColHeaderHoverText = GDK_RGBA_TO_NS_RGBA(color);
// Compute cell highlight colors
InitCellHighlightColors();
// GtkFrame has a "border" subnode on which Adwaita draws the border.
// Some themes do not draw on this node but draw a border on the widget
// root node, so check the root node if no border is found on the border
// node.
style = GetStyleContext(MOZ_GTK_FRAME_BORDER);
bool themeUsesColors =
GetBorderColors(style, &mFrameOuterLightBorder, &mFrameInnerDarkBorder);
if (!themeUsesColors) {
style = GetStyleContext(MOZ_GTK_FRAME);
GetBorderColors(style, &mFrameOuterLightBorder, &mFrameInnerDarkBorder);
}
// Some themes have a unified menu bar, and support window dragging on it
gboolean supports_menubar_drag = FALSE;
GParamSpec* param_spec = gtk_widget_class_find_style_property(
GTK_WIDGET_GET_CLASS(menuBar), "window-dragging");
if (param_spec) {
if (g_type_is_a(G_PARAM_SPEC_VALUE_TYPE(param_spec), G_TYPE_BOOLEAN)) {
gtk_widget_style_get(menuBar, "window-dragging", &supports_menubar_drag,
nullptr);
}
}
mMenuSupportsDrag = supports_menubar_drag;
// TODO: It returns wrong color for themes which
// sets link color for GtkLabel only as we query
// GtkLinkButton style here.
style = gtk_widget_get_style_context(linkButton);
gtk_style_context_get_color(style, GTK_STATE_FLAG_LINK, &color);
mNativeHyperLinkText = GDK_RGBA_TO_NS_RGBA(color);
gtk_style_context_get_color(style, GTK_STATE_FLAG_VISITED, &color);
mNativeVisitedHyperLinkText = GDK_RGBA_TO_NS_RGBA(color);
// invisible character styles
guint value;
g_object_get(entry, "invisible-char", &value, nullptr);
mInvisibleCharacter = char16_t(value);
// caret styles
gtk_widget_style_get(entry, "cursor-aspect-ratio", &mCaretRatio, nullptr);
GetSystemFontInfo(gtk_widget_get_style_context(entry), &mFieldFontName,
&mFieldFontStyle);
gtk_widget_destroy(window);
g_object_unref(labelWidget);
if (LOGLNF_ENABLED()) {
LOGLNF("Initialized theme %s (%d)\n", mName.get(), mPreferDarkTheme);
for (auto id : MakeEnumeratedRange(ColorID::End)) {
nscolor color;
nsresult rv = GetColor(id, color);
LOGLNF(" * color %d: pref=%s success=%d value=%x\n", int(id),
GetColorPrefName(id), NS_SUCCEEDED(rv),
NS_SUCCEEDED(rv) ? color : 0);
}
LOGLNF(" * titlebar-radius: %d\n", mTitlebarRadius);
LOGLNF(" * menu-radius: %d\n", mMenuRadius);
}
}
// virtual
char16_t nsLookAndFeel::GetPasswordCharacterImpl() {
EnsureInit();
return mSystemTheme.mInvisibleCharacter;
}
bool nsLookAndFeel::GetEchoPasswordImpl() { return false; }
bool nsLookAndFeel::GetDefaultDrawInTitlebar() {
static bool drawInTitlebar = []() {
// When user defined widget.default-hidden-titlebar don't do any
// heuristics and just follow it.
if (Preferences::HasUserValue("widget.default-hidden-titlebar")) {
return Preferences::GetBool("widget.default-hidden-titlebar", false);
}
// Don't hide titlebar when it's disabled on current desktop.
const char* currentDesktop = getenv("XDG_CURRENT_DESKTOP");
if (!currentDesktop || !sCSDAvailable) {
return false;
}
// We hide system titlebar on Gnome/ElementaryOS without any restriction.
return strstr(currentDesktop, "GNOME-Flashback:GNOME") ||
strstr(currentDesktop, "GNOME") ||
strstr(currentDesktop, "Pantheon");
}();
return drawInTitlebar;
}
void nsLookAndFeel::GetThemeInfo(nsACString& aInfo) {
aInfo.Append(mSystemTheme.mName);
aInfo.Append(" / ");
aInfo.Append(mAltTheme.mName);
}
bool nsLookAndFeel::WidgetUsesImage(WidgetNodeType aNodeType) {
static constexpr GtkStateFlags sFlagsToCheck[]{
GTK_STATE_FLAG_NORMAL, GTK_STATE_FLAG_PRELIGHT,
GtkStateFlags(GTK_STATE_FLAG_PRELIGHT | GTK_STATE_FLAG_ACTIVE),
GTK_STATE_FLAG_BACKDROP, GTK_STATE_FLAG_INSENSITIVE};
GtkStyleContext* style = GetStyleContext(aNodeType);
GValue value = G_VALUE_INIT;
for (GtkStateFlags state : sFlagsToCheck) {
gtk_style_context_get_property(style, "background-image", state, &value);
bool hasPattern = G_VALUE_TYPE(&value) == CAIRO_GOBJECT_TYPE_PATTERN &&
g_value_get_boxed(&value);
g_value_unset(&value);
if (hasPattern) {
return true;
}
}
return false;
}
void nsLookAndFeel::RecordLookAndFeelSpecificTelemetry() {
// Gtk version we're on.
nsString version;
version.AppendPrintf("%d.%d", gtk_major_version, gtk_minor_version);
Telemetry::ScalarSet(Telemetry::ScalarID::WIDGET_GTK_VERSION, version);
// Whether the current Gtk theme has scrollbar buttons.
bool hasScrollbarButtons =
GetInt(LookAndFeel::IntID::ScrollArrowStyle) != eScrollArrow_None;
mozilla::Telemetry::ScalarSet(
mozilla::Telemetry::ScalarID::WIDGET_GTK_THEME_HAS_SCROLLBAR_BUTTONS,
hasScrollbarButtons);
// Whether the current Gtk theme uses something other than a solid color
// background for scrollbar parts.
bool scrollbarUsesImage = !ShouldHonorThemeScrollbarColors();
mozilla::Telemetry::ScalarSet(
mozilla::Telemetry::ScalarID::WIDGET_GTK_THEME_SCROLLBAR_USES_IMAGES,
scrollbarUsesImage);
}
bool nsLookAndFeel::ShouldHonorThemeScrollbarColors() {
// If the Gtk theme uses anything other than solid color backgrounds for Gtk
// scrollbar parts, this is a good indication that painting XUL scrollbar part
// elements using colors extracted from the theme won't provide good results.
return !WidgetUsesImage(MOZ_GTK_SCROLLBAR_VERTICAL) &&
!WidgetUsesImage(MOZ_GTK_SCROLLBAR_CONTENTS_VERTICAL) &&
!WidgetUsesImage(MOZ_GTK_SCROLLBAR_TROUGH_VERTICAL) &&
!WidgetUsesImage(MOZ_GTK_SCROLLBAR_THUMB_VERTICAL);
}
#undef LOGLNF
#undef LOGLNF_ENABLED
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