widget/LookAndFeel.h
author Chris H-C <chutten@mozilla.com>
Mon, 04 Jul 2016 11:16:05 -0400
changeset 312997 df28918fe2361f0b54ca9ce4773a29c4c0675d06
parent 306909 5e41e5886c0f7e92c8adb338d8c939c0f25807ea
child 314366 c3eb99e7b16d9a12b6624dc47af220bc0b9fd7b2
permissions -rw-r--r--
bug 1218576 - Support remote accumulation via JS histograms. r=gfritzsche The JS histograms, too, need to dispatch their accumulations from child to parent. JSHistograms_Add now only supports histograms that are in gHistogramsMap or that were created in the parent process. After bug 1288745, maybe we'll be able to change this to be less convoluted. MozReview-Commit-ID: 3qTH89YKbGP

/* -*- 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 : uint8_t {

    // 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 */