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gecko-dev/widget/LookAndFeel.h
Kathy Brade 61c6a3b383 Bug 232227 - Do not expose system colors to CSS or canvas. r=jmuizelaar r=enndeakin tor-r=arthuredelstein 
--HG--
extra : rebase_source : 54498135a11fb7d7e9f4154ad5d5bfbf87a927bd
2015-09-25 00:59:00 +02:00

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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 "nsTArray.h"
struct gfxFontStyle;
struct LookAndFeelInt
{
int32_t id;
int32_t value;
};
namespace mozilla {
class LookAndFeel
{
public:
// When modifying this list, also modify nsXPLookAndFeel::sColorPrefs
// in widget/xpwidgts/nsXPLookAndFeel.cpp.
enum ColorID {
// WARNING : NO NEGATIVE VALUE IN THIS ENUMERATION
// see patch in bug 57757 for more information
eColorID_WindowBackground,
eColorID_WindowForeground,
eColorID_WidgetBackground,
eColorID_WidgetForeground,
eColorID_WidgetSelectBackground,
eColorID_WidgetSelectForeground,
eColorID_Widget3DHighlight,
eColorID_Widget3DShadow,
eColorID_TextBackground,
eColorID_TextForeground,
eColorID_TextSelectBackground,
eColorID_TextSelectForeground,
eColorID_TextSelectForegroundCustom,
eColorID_TextSelectBackgroundDisabled,
eColorID_TextSelectBackgroundAttention,
eColorID_TextHighlightBackground,
eColorID_TextHighlightForeground,
eColorID_IMERawInputBackground,
eColorID_IMERawInputForeground,
eColorID_IMERawInputUnderline,
eColorID_IMESelectedRawTextBackground,
eColorID_IMESelectedRawTextForeground,
eColorID_IMESelectedRawTextUnderline,
eColorID_IMEConvertedTextBackground,
eColorID_IMEConvertedTextForeground,
eColorID_IMEConvertedTextUnderline,
eColorID_IMESelectedConvertedTextBackground,
eColorID_IMESelectedConvertedTextForeground,
eColorID_IMESelectedConvertedTextUnderline,
eColorID_SpellCheckerUnderline,
// New CSS 2 color definitions
eColorID_activeborder,
eColorID_activecaption,
eColorID_appworkspace,
eColorID_background,
eColorID_buttonface,
eColorID_buttonhighlight,
eColorID_buttonshadow,
eColorID_buttontext,
eColorID_captiontext,
eColorID_graytext,
eColorID_highlight,
eColorID_highlighttext,
eColorID_inactiveborder,
eColorID_inactivecaption,
eColorID_inactivecaptiontext,
eColorID_infobackground,
eColorID_infotext,
eColorID_menu,
eColorID_menutext,
eColorID_scrollbar,
eColorID_threeddarkshadow,
eColorID_threedface,
eColorID_threedhighlight,
eColorID_threedlightshadow,
eColorID_threedshadow,
eColorID_window,
eColorID_windowframe,
eColorID_windowtext,
eColorID__moz_buttondefault,
// Colors which will hopefully become CSS3
eColorID__moz_field,
eColorID__moz_fieldtext,
eColorID__moz_dialog,
eColorID__moz_dialogtext,
// used to highlight valid regions to drop something onto
eColorID__moz_dragtargetzone,
// used to cell text background, selected but not focus
eColorID__moz_cellhighlight,
// used to cell text, selected but not focus
eColorID__moz_cellhighlighttext,
// used to html select cell text background, selected but not focus
eColorID__moz_html_cellhighlight,
// used to html select cell text, selected but not focus
eColorID__moz_html_cellhighlighttext,
// used to button text background, when mouse is over
eColorID__moz_buttonhoverface,
// used to button text, when mouse is over
eColorID__moz_buttonhovertext,
// used to menu item background, when mouse is over
eColorID__moz_menuhover,
// used to menu item text, when mouse is over
eColorID__moz_menuhovertext,
// used to menu bar item text
eColorID__moz_menubartext,
// used to menu bar item text, when mouse is over
eColorID__moz_menubarhovertext,
// On platforms where these colors are the same as
// -moz-field, use -moz-fieldtext as foreground color
eColorID__moz_eventreerow,
eColorID__moz_oddtreerow,
// colors needed by the Mac OS X theme
// foreground color of :hover:active buttons
eColorID__moz_mac_buttonactivetext,
// background color of chrome toolbars in active windows
eColorID__moz_mac_chrome_active,
// background color of chrome toolbars in inactive windows
eColorID__moz_mac_chrome_inactive,
// foreground color of default buttons
eColorID__moz_mac_defaultbuttontext,
//ring around text fields and lists
eColorID__moz_mac_focusring,
//colour used when mouse is over a menu item
eColorID__moz_mac_menuselect,
//colour used to do shadows on menu items
eColorID__moz_mac_menushadow,
// color used to display text for disabled menu items
eColorID__moz_mac_menutextdisable,
//colour used to display text while mouse is over a menu item
eColorID__moz_mac_menutextselect,
// text color of disabled text on toolbars
eColorID__moz_mac_disabledtoolbartext,
//inactive light hightlight
eColorID__moz_mac_secondaryhighlight,
// vista rebars
// media rebar text
eColorID__moz_win_mediatext,
// communications rebar text
eColorID__moz_win_communicationstext,
// Hyperlink color extracted from the system, not affected by the
// browser.anchor_color user pref.
// There is no OS-specified safe background color for this text,
// but it is used regularly within Windows and the Gnome DE on Dialog and
// Window colors.
eColorID__moz_nativehyperlinktext,
// Combo box widgets
eColorID__moz_comboboxtext,
eColorID__moz_combobox,
// GtkInfoBar
eColorID__moz_gtk_info_bar_text,
// keep this one last, please
eColorID_LAST_COLOR
};
// When modifying this list, also modify nsXPLookAndFeel::sIntPrefs
// in widget/xpwidgts/nsXPLookAndFeel.cpp.
enum IntID {
// default, may be overriden by OS
eIntID_CaretBlinkTime,
// pixel width of caret
eIntID_CaretWidth,
// show the caret when text is selected?
eIntID_ShowCaretDuringSelection,
// select textfields when focused via tab/accesskey?
eIntID_SelectTextfieldsOnKeyFocus,
// delay before submenus open
eIntID_SubmenuDelay,
// can popups overlap menu/task bar?
eIntID_MenusCanOverlapOSBar,
// should overlay scrollbars be used?
eIntID_UseOverlayScrollbars,
// allow H and V overlay scrollbars to overlap?
eIntID_AllowOverlayScrollbarsOverlap,
// show/hide scrollbars based on activity
eIntID_ShowHideScrollbars,
// skip navigating to disabled menu item?
eIntID_SkipNavigatingDisabledMenuItem,
// begin a drag if the mouse is moved further than the threshold while the
// button is down
eIntID_DragThresholdX,
eIntID_DragThresholdY,
// Accessibility theme being used?
eIntID_UseAccessibilityTheme,
// position of scroll arrows in a scrollbar
eIntID_ScrollArrowStyle,
// is scroll thumb proportional or fixed?
eIntID_ScrollSliderStyle,
// each button can take one of four values:
eIntID_ScrollButtonLeftMouseButtonAction,
// 0 - scrolls one line, 1 - scrolls one page
eIntID_ScrollButtonMiddleMouseButtonAction,
// 2 - scrolls to end, 3 - button ignored
eIntID_ScrollButtonRightMouseButtonAction,
// delay for opening spring loaded folders
eIntID_TreeOpenDelay,
// delay for closing spring loaded folders
eIntID_TreeCloseDelay,
// delay for triggering the tree scrolling
eIntID_TreeLazyScrollDelay,
// delay for scrolling the tree
eIntID_TreeScrollDelay,
// the maximum number of lines to be scrolled at ones
eIntID_TreeScrollLinesMax,
// What type of tab-order to use
eIntID_TabFocusModel,
// Should menu items blink when they're chosen?
eIntID_ChosenMenuItemsShouldBlink,
/*
* 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.
*/
eIntID_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.
*/
eIntID_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).
*/
eIntID_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).
*/
eIntID_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.
*/
eIntID_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.
*/
eIntID_MacGraphiteTheme,
/*
* A Boolean value to determine whether the Mac OS X Lion-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.
*/
eIntID_MacLionTheme,
/*
* A Boolean value to determine whether the Mac OS X Yosemite-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.
*/
eIntID_MacYosemiteTheme,
/*
* eIntID_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
*/
eIntID_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.
*/
eIntID_ScrollToClick,
/**
* IME and spell checker underline styles, the values should be
* NS_DECORATION_LINE_STYLE_*. They are defined below.
*/
eIntID_IMERawInputUnderlineStyle,
eIntID_IMESelectedRawTextUnderlineStyle,
eIntID_IMEConvertedTextUnderlineStyle,
eIntID_IMESelectedConvertedTextUnderline,
eIntID_SpellCheckerUnderlineStyle,
/**
* If this metric != 0, show icons in menus.
*/
eIntID_ImagesInMenus,
/**
* If this metric != 0, show icons in buttons.
*/
eIntID_ImagesInButtons,
/**
* If this metric != 0, support window dragging on the menubar.
*/
eIntID_MenuBarDrag,
/**
* Return the appropriate WindowsThemeIdentifier for the current theme.
*/
eIntID_WindowsThemeIdentifier,
/**
* Return an appropriate os version identifier.
*/
eIntID_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.
*/
eIntID_ScrollbarButtonAutoRepeatBehavior,
/**
* Delay before showing a tooltip.
*/
eIntID_TooltipDelay,
/*
* A Boolean value to determine whether Mac OS X Lion style swipe animations
* should be used.
*/
eIntID_SwipeAnimationEnabled,
/*
* A Boolean value to determine whether we have a color picker available
* for <input type="color"> to hook into.
*
* This lets us selectively enable the style for <input type="color">
* based on whether it's functional or not.
*/
eIntID_ColorPickerAvailable,
/*
* A boolean value indicating whether or not the device has a hardware
* home button. Used on gaia to determine whether a home button
* is shown.
*/
eIntID_PhysicalHomeButton,
/*
* Controls whether overlay scrollbars display when the user moves
* the mouse in a scrollable frame.
*/
eIntID_ScrollbarDisplayOnMouseMove,
/*
* Overlay scrollbar animation constants.
*/
eIntID_ScrollbarFadeBeginDelay,
eIntID_ScrollbarFadeDuration,
/**
* Distance in pixels to offset the context menu from the cursor
* on open.
*/
eIntID_ContextMenuOffsetVertical,
eIntID_ContextMenuOffsetHorizontal
};
/**
* 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 OperatingSystemVersion {
eOperatingSystemVersion_WindowsXP = 0,
eOperatingSystemVersion_WindowsVista,
eOperatingSystemVersion_Windows7,
eOperatingSystemVersion_Windows8,
eOperatingSystemVersion_Windows10,
eOperatingSystemVersion_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/xpwidgts/nsXPLookAndFeel.cpp.
enum FloatID {
eFloatID_IMEUnderlineRelativeSize,
eFloatID_SpellCheckerUnderlineRelativeSize,
// The width/height ratio of the cursor. If used, the CaretWidth int metric
// should be added to the calculated caret width.
eFloatID_CaretAspectRatio
};
// These constants must be kept in 1:1 correspondence with the
// NS_STYLE_FONT_* system font constants.
enum FontID {
eFont_Caption = 1, // css2
eFont_Icon,
eFont_Menu,
eFont_MessageBox,
eFont_SmallCaption,
eFont_StatusBar,
eFont_Window, // css3
eFont_Document,
eFont_Workspace,
eFont_Desktop,
eFont_Info,
eFont_Dialog,
eFont_Button,
eFont_PullDownMenu,
eFont_List,
eFont_Field,
eFont_Tooltips, // moz
eFont_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:
* eColorID_TextSelectForeground might return NS_DONT_CHANGE_COLOR.
* eColorID_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 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.
*
* @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.
* @param aDevPixPerCSSPixel Ratio of device pixels to CSS pixels
*/
static bool GetFont(FontID aID, nsString& aName, gfxFontStyle& aStyle,
float aDevPixPerCSSPixel);
/**
* 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();
/**
* If the implementation is caching values, these accessors allow the
* cache to be exported and imported.
*/
static nsTArray<LookAndFeelInt> GetIntCache();
static void SetIntCache(const nsTArray<LookAndFeelInt>& aLookAndFeelIntCache);
};
} // namespace mozilla
// On the Mac, GetColor(eColorID_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 eColorID_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 eColorID_IME* and eColorID_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 eIntID_AlertNotificationOrigin
// ------------------------------------------
#define NS_ALERT_HORIZONTAL 1
#define NS_ALERT_LEFT 2
#define NS_ALERT_TOP 4
#endif /* __LookAndFeel */
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