widget/nsNativeTheme.h
author cku <cku@mozilla.com>
Fri, 05 May 2017 17:19:43 +0800
changeset 359137 f3460d42d23cb21093146a2ace98009d581bd77a
parent 318907 bd7cb9b5537a75b772693f19e6e0a711456b7fc9
child 371127 4b879e41eae3aa845e77f6ce7336fb9eb4ed35fa
permissions -rw-r--r--
Bug 1351440 - Part 2. Encapsulate DrawResult and imgIContainer::FLAG_* into imgDrawingParams, and pass it to PaintSVG. r=jwatt The DrawResult return was not in fact anything to do with the success or failure of that method, but was actually passing out a very specific piece of information about the success or failure of any imagelib drawing that may not have occurred under the various PaintSVG calls. The signature of PaintSVG is changed from DrawResult PaintSVG(...., uint32 flags); to void PaintSVG(...., imgDrawingParams& aPackage); imgDrawingParams wraps DrawResult and imgIContainer::FLAG_* as a pack, pass through PaintSVG to imagelib draw calls under beneath. MozReview-Commit-ID: IOq2evUAOQF

/* -*- 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/. */

// This defines a common base class for nsITheme implementations, to reduce
// code duplication.

#include "nsAlgorithm.h"
#include "nsIAtom.h"
#include "nsCOMPtr.h"
#include "nsString.h"
#include "nsMargin.h"
#include "nsGkAtoms.h"
#include "nsTArray.h"
#include "nsITimer.h"
#include "nsIContent.h"

class nsIFrame;
class nsIPresShell;
class nsPresContext;

namespace mozilla {
class EventStates;
} // namespace mozilla

class nsNativeTheme : public nsITimerCallback
{
 protected:
  virtual ~nsNativeTheme() {}

  NS_DECL_ISUPPORTS
  NS_DECL_NSITIMERCALLBACK

  enum ScrollbarButtonType {
    eScrollbarButton_UpTop   = 0,
    eScrollbarButton_Down    = 1 << 0,
    eScrollbarButton_Bottom  = 1 << 1
  };

  enum TreeSortDirection {
    eTreeSortDirection_Descending,
    eTreeSortDirection_Natural,
    eTreeSortDirection_Ascending
  };

  nsNativeTheme();

  // Returns the content state (hover, focus, etc), see EventStateManager.h
  mozilla::EventStates GetContentState(nsIFrame* aFrame, uint8_t aWidgetType);

  // Returns whether the widget is already styled by content
  // Normally called from ThemeSupportsWidget to turn off native theming
  // for elements that are already styled.
  bool IsWidgetStyled(nsPresContext* aPresContext, nsIFrame* aFrame,
                        uint8_t aWidgetType);                                              

  // Accessors to widget-specific state information

  bool IsDisabled(nsIFrame* aFrame, mozilla::EventStates aEventStates);

  // RTL chrome direction
  static bool IsFrameRTL(nsIFrame* aFrame);

  bool IsHTMLContent(nsIFrame *aFrame);
  
  // button:
  bool IsDefaultButton(nsIFrame* aFrame) {
    return CheckBooleanAttr(aFrame, nsGkAtoms::_default);
  }

  bool IsButtonTypeMenu(nsIFrame* aFrame);

  // checkbox:
  bool IsChecked(nsIFrame* aFrame) {
    return GetCheckedOrSelected(aFrame, false);
  }

  // radiobutton:
  bool IsSelected(nsIFrame* aFrame) {
    return GetCheckedOrSelected(aFrame, true);
  }

  bool IsFocused(nsIFrame* aFrame) {
    return CheckBooleanAttr(aFrame, nsGkAtoms::focused);
  }

  // scrollbar button:
  int32_t GetScrollbarButtonType(nsIFrame* aFrame);

  // tab:
  bool IsSelectedTab(nsIFrame* aFrame) {
    return CheckBooleanAttr(aFrame, nsGkAtoms::visuallyselected);
  }
  
  bool IsNextToSelectedTab(nsIFrame* aFrame, int32_t aOffset);
  
  bool IsBeforeSelectedTab(nsIFrame* aFrame) {
    return IsNextToSelectedTab(aFrame, -1);
  }
  
  bool IsAfterSelectedTab(nsIFrame* aFrame) {
    return IsNextToSelectedTab(aFrame, 1);
  }

  bool IsLeftToSelectedTab(nsIFrame* aFrame) {
    return IsFrameRTL(aFrame) ? IsAfterSelectedTab(aFrame) : IsBeforeSelectedTab(aFrame);
  }

  bool IsRightToSelectedTab(nsIFrame* aFrame) {
    return IsFrameRTL(aFrame) ? IsBeforeSelectedTab(aFrame) : IsAfterSelectedTab(aFrame);
  }

  // button / toolbarbutton:
  bool IsCheckedButton(nsIFrame* aFrame) {
    return CheckBooleanAttr(aFrame, nsGkAtoms::checked);
  }

  bool IsSelectedButton(nsIFrame* aFrame) {
    return CheckBooleanAttr(aFrame, nsGkAtoms::checked) ||
           CheckBooleanAttr(aFrame, nsGkAtoms::selected);
  }

  bool IsOpenButton(nsIFrame* aFrame) {
    return CheckBooleanAttr(aFrame, nsGkAtoms::open);
  }

  bool IsPressedButton(nsIFrame* aFrame);

  // treeheadercell:
  TreeSortDirection GetTreeSortDirection(nsIFrame* aFrame);
  bool IsLastTreeHeaderCell(nsIFrame* aFrame);

  // tab:
  bool IsBottomTab(nsIFrame* aFrame);
  bool IsFirstTab(nsIFrame* aFrame);
  
  bool IsHorizontal(nsIFrame* aFrame);

  // progressbar:
  bool IsIndeterminateProgress(nsIFrame* aFrame,
                               mozilla::EventStates aEventStates);
  bool IsVerticalProgress(nsIFrame* aFrame);

  // meter:
  bool IsVerticalMeter(nsIFrame* aFrame);

  // textfield:
  bool IsReadOnly(nsIFrame* aFrame) {
      return CheckBooleanAttr(aFrame, nsGkAtoms::readonly);
  }

  // menupopup:
  bool IsSubmenu(nsIFrame* aFrame, bool* aLeftOfParent);

  // True if it's not a menubar item or menulist item
  bool IsRegularMenuItem(nsIFrame *aFrame);

  bool IsMenuListEditable(nsIFrame *aFrame);

  nsIPresShell *GetPresShell(nsIFrame* aFrame);
  static bool CheckBooleanAttr(nsIFrame* aFrame, nsIAtom* aAtom);
  static int32_t CheckIntAttr(nsIFrame* aFrame, nsIAtom* aAtom, int32_t defaultValue);

  // Helpers for progressbar.
  static double GetProgressValue(nsIFrame* aFrame);
  static double GetProgressMaxValue(nsIFrame* aFrame);

  bool GetCheckedOrSelected(nsIFrame* aFrame, bool aCheckSelected);
  bool GetIndeterminate(nsIFrame* aFrame);

  bool QueueAnimatedContentForRefresh(nsIContent* aContent,
                                        uint32_t aMinimumFrameRate);

  nsIFrame* GetAdjacentSiblingFrameWithSameAppearance(nsIFrame* aFrame,
                                                      bool aNextSibling);

  bool IsRangeHorizontal(nsIFrame* aFrame);

  // scrollbar
  bool IsDarkBackground(nsIFrame* aFrame);

 private:
  uint32_t mAnimatedContentTimeout;
  nsCOMPtr<nsITimer> mAnimatedContentTimer;
  AutoTArray<nsCOMPtr<nsIContent>, 20> mAnimatedContentList;
};