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gecko-dev/widget/LookAndFeel.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 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/. */
#ifndef __LookAndFeel
#define __LookAndFeel
#ifndef MOZILLA_INTERNAL_API
# error "This header is only usable from within libxul (MOZILLA_INTERNAL_API)."
#endif
#include "nsDebug.h"
#include "nsColor.h"
#include "nsString.h"
#include "nsTArray.h"
#include "mozilla/widget/ThemeChangeKind.h"
struct gfxFontStyle;
namespace mozilla {
namespace widget {
class LookAndFeelCache;
} // namespace widget
enum class StyleSystemColor : uint8_t;
class LookAndFeel {
public:
using ColorID = StyleSystemColor;
// When modifying this list, also modify nsXPLookAndFeel::sIntPrefs
// in widget/xpwidgts/nsXPLookAndFeel.cpp.
enum class IntID {
// default, may be overriden by OS
CaretBlinkTime,
// pixel width of caret
CaretWidth,
// show the caret when text is selected?
ShowCaretDuringSelection,
// select textfields when focused via tab/accesskey?
SelectTextfieldsOnKeyFocus,
// delay before submenus open
SubmenuDelay,
// can popups overlap menu/task bar?
MenusCanOverlapOSBar,
// should overlay scrollbars be used?
UseOverlayScrollbars,
// allow H and V overlay scrollbars to overlap?
AllowOverlayScrollbarsOverlap,
// show/hide scrollbars based on activity
ShowHideScrollbars,
// skip navigating to disabled menu item?
SkipNavigatingDisabledMenuItem,
// begin a drag if the mouse is moved further than the threshold while the
// button is down
DragThresholdX,
DragThresholdY,
// Accessibility theme being used?
UseAccessibilityTheme,
// position of scroll arrows in a scrollbar
ScrollArrowStyle,
// is scroll thumb proportional or fixed?
ScrollSliderStyle,
// each button can take one of four values:
ScrollButtonLeftMouseButtonAction,
// 0 - scrolls one line, 1 - scrolls one page
ScrollButtonMiddleMouseButtonAction,
// 2 - scrolls to end, 3 - button ignored
ScrollButtonRightMouseButtonAction,
// delay for opening spring loaded folders
TreeOpenDelay,
// delay for closing spring loaded folders
TreeCloseDelay,
// delay for triggering the tree scrolling
TreeLazyScrollDelay,
// delay for scrolling the tree
TreeScrollDelay,
// the maximum number of lines to be scrolled at ones
TreeScrollLinesMax,
// What type of tab-order to use
TabFocusModel,
// Should menu items blink when they're chosen?
ChosenMenuItemsShouldBlink,
/*
* A Boolean value to determine whether the Windows accent color
* should be applied to the title bar.
*
* The value of this metric is not used on other platforms. These platforms
* should return NS_ERROR_NOT_IMPLEMENTED when queried for this metric.
*/
WindowsAccentColorInTitlebar,
/*
* A Boolean value to determine whether the Windows default theme is
* being used.
*
* The value of this metric is not used on other platforms. These platforms
* should return NS_ERROR_NOT_IMPLEMENTED when queried for this metric.
*/
WindowsDefaultTheme,
/*
* A Boolean value to determine whether the DWM compositor is being used
*
* This metric is not used on non-Windows platforms. These platforms
* should return NS_ERROR_NOT_IMPLEMENTED when queried for this metric.
*/
DWMCompositor,
/*
* A Boolean value to determine whether Windows is themed (Classic vs.
* uxtheme)
*
* This is Windows-specific and is not implemented on other platforms
* (will return the default of NS_ERROR_FAILURE).
*/
WindowsClassic,
/*
* A Boolean value to determine whether the current Windows desktop theme
* supports Aero Glass.
*
* This is Windows-specific and is not implemented on other platforms
* (will return the default of NS_ERROR_FAILURE).
*/
WindowsGlass,
/*
* A Boolean value to determine whether the device is a touch enabled
* device. Currently this is only supported by the Windows 7 Touch API.
*
* Platforms that do not support this metric should return
* NS_ERROR_NOT_IMPLEMENTED when queried for this metric.
*/
TouchEnabled,
/*
* A Boolean value to determine whether the Mac graphite theme is
* being used.
*
* The value of this metric is not used on other platforms. These platforms
* should return NS_ERROR_NOT_IMPLEMENTED when queried for this metric.
*/
MacGraphiteTheme,
/*
* A Boolean value to determine whether the macOS Big Sur-specific
* theming should be used.
*
* The value of this metric is not used on non-Mac platforms. These
* platforms should return NS_ERROR_NOT_IMPLEMENTED when queried for this
* metric.
*/
MacBigSurTheme,
/*
* AlertNotificationOrigin indicates from which corner of the
* screen alerts slide in, and from which direction (horizontal/vertical).
* 0, the default, represents bottom right, sliding vertically.
* Use any bitwise combination of the following constants:
* NS_ALERT_HORIZONTAL (1), NS_ALERT_LEFT (2), NS_ALERT_TOP (4).
*
* 6 4
* +-----------+
* 7| |5
* | |
* 3| |1
* +-----------+
* 2 0
*/
AlertNotificationOrigin,
/**
* If true, clicking on a scrollbar (not as in dragging the thumb) defaults
* to scrolling the view corresponding to the clicked point. Otherwise, we
* only do so if the scrollbar is clicked using the middle mouse button or
* if shift is pressed when the scrollbar is clicked.
*/
ScrollToClick,
/**
* IME and spell checker underline styles, the values should be
* NS_DECORATION_LINE_STYLE_*. They are defined below.
*/
IMERawInputUnderlineStyle,
IMESelectedRawTextUnderlineStyle,
IMEConvertedTextUnderlineStyle,
IMESelectedConvertedTextUnderline,
SpellCheckerUnderlineStyle,
/**
* If this metric != 0, support window dragging on the menubar.
*/
MenuBarDrag,
/**
* Return the appropriate WindowsThemeIdentifier for the current theme.
*/
WindowsThemeIdentifier,
/**
* Return an appropriate os version identifier.
*/
OperatingSystemVersionIdentifier,
/**
* 0: scrollbar button repeats to scroll only when cursor is on the button.
* 1: scrollbar button repeats to scroll even if cursor is outside of it.
*/
ScrollbarButtonAutoRepeatBehavior,
/**
* Delay before showing a tooltip.
*/
TooltipDelay,
/*
* A Boolean value to determine whether Mac OS X Lion style swipe animations
* should be used.
*/
SwipeAnimationEnabled,
/*
* Controls whether overlay scrollbars display when the user moves
* the mouse in a scrollable frame.
*/
ScrollbarDisplayOnMouseMove,
/*
* Overlay scrollbar animation constants.
*/
ScrollbarFadeBeginDelay,
ScrollbarFadeDuration,
/**
* Distance in pixels to offset the context menu from the cursor
* on open.
*/
ContextMenuOffsetVertical,
ContextMenuOffsetHorizontal,
/*
* A boolean value indicating whether client-side decorations are
* supported by the user's GTK version.
*/
GTKCSDAvailable,
/*
* A boolean value indicating whether GTK+ system titlebar should be
* disabled by default.
*/
GTKCSDHideTitlebarByDefault,
/*
* A boolean value indicating whether client-side decorations should
* have transparent background.
*/
GTKCSDTransparentBackground,
/*
* A boolean value indicating whether client-side decorations should
* contain a minimize button.
*/
GTKCSDMinimizeButton,
/*
* A boolean value indicating whether client-side decorations should
* contain a maximize button.
*/
GTKCSDMaximizeButton,
/*
* A boolean value indicating whether client-side decorations should
* contain a close button.
*/
GTKCSDCloseButton,
/*
* A boolean value indicating whether titlebar buttons are located
* in left titlebar corner.
*/
GTKCSDReversedPlacement,
/*
* A boolean value indicating whether or not the OS is using a dark theme,
* which we may want to switch to as well if not overridden by the user.
*/
SystemUsesDarkTheme,
/**
* Corresponding to prefers-reduced-motion.
* https://drafts.csswg.org/mediaqueries-5/#prefers-reduced-motion
* 0: no-preference
* 1: reduce
*/
PrefersReducedMotion,
/**
* Corresponding to PointerCapabilities in ServoTypes.h
* 0: None
* 1: Coarse
* 2: Fine
* 4: Hover
*/
PrimaryPointerCapabilities,
/**
* Corresponding to union of PointerCapabilities values in ServoTypes.h
* E.g. if there is a mouse and a digitizer, the value will be
* 'Coarse | Fine | Hover'.
*/
AllPointerCapabilities,
/**
* An Integer value that will represent the position of the Close button
* in GTK Client side decoration header. Its value will be between 0 and 2
* if it is on the left side of the tabbar, otherwise it will be between
* 3 and 5.
*/
GTKCSDCloseButtonPosition,
/**
* An Integer value that will represent the position of the Minimize button
* in GTK Client side decoration header. Its value will be between 0 and 2
* if it is on the left side of the tabbar, otherwise it will be between
* 3 and 5.
*/
GTKCSDMinimizeButtonPosition,
/**
* An Integer value that will represent the position of the Maximize button
* in GTK Client side decoration header. Its value will be between 0 and 2
* if it is on the left side of the tabbar, otherwise it will be between
* 3 and 5.
*/
GTKCSDMaximizeButtonPosition,
/*
* Not an ID; used to define the range of valid IDs. Must be last.
*/
End,
};
/**
* Windows themes we currently detect.
*/
enum WindowsTheme {
eWindowsTheme_Generic = 0, // unrecognized theme
eWindowsTheme_Classic,
eWindowsTheme_Aero,
eWindowsTheme_LunaBlue,
eWindowsTheme_LunaOlive,
eWindowsTheme_LunaSilver,
eWindowsTheme_Royale,
eWindowsTheme_Zune,
eWindowsTheme_AeroLite
};
/**
* Operating system versions.
*/
enum class OperatingSystemVersion {
Windows7 = 2,
Windows8,
Windows10,
Unknown
};
enum {
eScrollArrow_None = 0,
eScrollArrow_StartBackward = 0x1000,
eScrollArrow_StartForward = 0x0100,
eScrollArrow_EndBackward = 0x0010,
eScrollArrow_EndForward = 0x0001
};
enum {
// single arrow at each end
eScrollArrowStyle_Single =
eScrollArrow_StartBackward | eScrollArrow_EndForward,
// both arrows at bottom/right, none at top/left
eScrollArrowStyle_BothAtBottom =
eScrollArrow_EndBackward | eScrollArrow_EndForward,
// both arrows at both ends
eScrollArrowStyle_BothAtEachEnd =
eScrollArrow_EndBackward | eScrollArrow_EndForward |
eScrollArrow_StartBackward | eScrollArrow_StartForward,
// both arrows at top/left, none at bottom/right
eScrollArrowStyle_BothAtTop =
eScrollArrow_StartBackward | eScrollArrow_StartForward
};
enum { eScrollThumbStyle_Normal, eScrollThumbStyle_Proportional };
// When modifying this list, also modify nsXPLookAndFeel::sFloatPrefs
// in widget/nsXPLookAndFeel.cpp.
enum class FloatID {
IMEUnderlineRelativeSize,
SpellCheckerUnderlineRelativeSize,
// The width/height ratio of the cursor. If used, the CaretWidth int metric
// should be added to the calculated caret width.
CaretAspectRatio,
};
// These constants must be kept in 1:1 correspondence with the
// NS_STYLE_FONT_* system font constants.
enum class FontID {
Caption = 1, // css2
MINIMUM = Caption,
Icon,
Menu,
MessageBox,
SmallCaption,
StatusBar,
Window, // css3
Document,
Workspace,
Desktop,
Info,
Dialog,
Button,
PullDownMenu,
List,
Field,
Tooltips, // moz
Widget,
MAXIMUM = Widget,
};
/**
* GetColor() return a native color value (might be overwritten by prefs) for
* aID. Some platforms don't return an error even if the index doesn't
* match any system colors. And also some platforms may initialize the
* return value even when it returns an error. Therefore, if you want to
* use a color for the default value, you should use the other GetColor()
* which returns nscolor directly.
*
* NOTE:
* ColorID::TextSelectForeground might return NS_DONT_CHANGE_COLOR.
* ColorID::IME* might return NS_TRANSPARENT, NS_SAME_AS_FOREGROUND_COLOR or
* NS_40PERCENT_FOREGROUND_COLOR.
* These values have particular meaning. Then, they are not an actual
* color value.
*/
static nsresult GetColor(ColorID aID, nscolor* aResult);
/**
* This variant of GetColor() takes an extra Boolean parameter that allows
* the caller to ask that hard-coded color values be substituted for
* native colors (used when it is desireable to hide system colors to
* avoid system fingerprinting).
*/
static nsresult GetColor(ColorID aID, bool aUseStandinsForNativeColors,
nscolor* aResult);
/**
* GetInt() and GetFloat() return a int or float value for aID. The result
* might be distance, time, some flags or a int value which has particular
* meaning. See each document at definition of each ID for the detail.
* The result is always 0 when they return error. Therefore, if you want to
* use a value for the default value, you should use the other method which
* returns int or float directly.
*/
static nsresult GetInt(IntID aID, int32_t* aResult);
static nsresult GetFloat(FloatID aID, float* aResult);
static nscolor GetColor(ColorID aID, nscolor aDefault = NS_RGB(0, 0, 0)) {
nscolor result = NS_RGB(0, 0, 0);
if (NS_FAILED(GetColor(aID, &result))) {
return aDefault;
}
return result;
}
static nscolor GetColorUsingStandins(ColorID aID,
nscolor aDefault = NS_RGB(0, 0, 0)) {
nscolor result = NS_RGB(0, 0, 0);
if (NS_FAILED(GetColor(aID,
true, // aUseStandinsForNativeColors
&result))) {
return aDefault;
}
return result;
}
static int32_t GetInt(IntID aID, int32_t aDefault = 0) {
int32_t result;
if (NS_FAILED(GetInt(aID, &result))) {
return aDefault;
}
return result;
}
static float GetFloat(FloatID aID, float aDefault = 0.0f) {
float result;
if (NS_FAILED(GetFloat(aID, &result))) {
return aDefault;
}
return result;
}
/**
* Retrieve the name and style of a system-theme font. Returns true
* if the system theme specifies this font, false if a default should
* be used. In the latter case neither aName nor aStyle is modified.
*
* Size of the font should be in CSS pixels, not device pixels.
*
* @param aID Which system-theme font is wanted.
* @param aName The name of the font to use.
* @param aStyle Styling to apply to the font.
*/
static bool GetFont(FontID aID, nsString& aName, gfxFontStyle& aStyle);
/**
* GetPasswordCharacter() returns a unicode character which should be used
* for a masked character in password editor. E.g., '*'.
*/
static char16_t GetPasswordCharacter();
/**
* If the latest character in password field shouldn't be hidden by the
* result of GetPasswordCharacter(), GetEchoPassword() returns TRUE.
* Otherwise, FALSE.
*/
static bool GetEchoPassword();
/**
* The millisecond to mask password value.
* This value is only valid when GetEchoPassword() returns true.
*/
static uint32_t GetPasswordMaskDelay();
/**
* When system look and feel is changed, Refresh() must be called. Then,
* cached data would be released.
*/
static void Refresh();
/**
* GTK's initialization code can't be run off main thread, call this
* if you plan on using LookAndFeel off main thread later.
*
* This initialized state may get reset due to theme changes, so it
* must be called prior to each potential off-main-thread LookAndFeel
* call, not just once.
*/
static void NativeInit();
/**
* If the implementation is caching values, these accessors allow the
* cache to be exported and imported.
*/
static widget::LookAndFeelCache GetCache();
static void SetCache(const widget::LookAndFeelCache& aCache);
static void NotifyChangedAllWindows(widget::ThemeChangeKind);
};
} // namespace mozilla
// On the Mac, GetColor(ColorID::TextSelectForeground, color) returns this
// constant to specify that the foreground color should not be changed
// (ie. a colored text keeps its colors when selected).
// Of course if other plaforms work like the Mac, they can use it too.
#define NS_DONT_CHANGE_COLOR NS_RGB(0x01, 0x01, 0x01)
// Similar with NS_DONT_CHANGE_COLOR, except NS_DONT_CHANGE_COLOR would returns
// complementary color if fg color is same as bg color.
// NS_CHANGE_COLOR_IF_SAME_AS_BG would returns
// ColorID::TextSelectForegroundCustom if fg and bg color are the same.
#define NS_CHANGE_COLOR_IF_SAME_AS_BG NS_RGB(0x02, 0x02, 0x02)
// ---------------------------------------------------------------------
// Special colors for ColorID::IME* and ColorID::SpellCheckerUnderline
// ---------------------------------------------------------------------
// For background color only.
#define NS_TRANSPARENT NS_RGBA(0x01, 0x00, 0x00, 0x00)
// For foreground color only.
#define NS_SAME_AS_FOREGROUND_COLOR NS_RGBA(0x02, 0x00, 0x00, 0x00)
#define NS_40PERCENT_FOREGROUND_COLOR NS_RGBA(0x03, 0x00, 0x00, 0x00)
#define NS_IS_SELECTION_SPECIAL_COLOR(c) \
((c) == NS_TRANSPARENT || (c) == NS_SAME_AS_FOREGROUND_COLOR || \
(c) == NS_40PERCENT_FOREGROUND_COLOR)
// ------------------------------------------
// Bits for IntID::AlertNotificationOrigin
// ------------------------------------------
#define NS_ALERT_HORIZONTAL 1
#define NS_ALERT_LEFT 2
#define NS_ALERT_TOP 4
#endif /* __LookAndFeel */
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