mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
97b02e847e
Add a function to set margins on the viewport that are respected by its absolute containing block. This has the effect of being able to add margins to fixed position content, which will be used on mobile to stop temporarily visible chrome from obscuring content.
1526 lines
56 KiB
C++
1526 lines
56 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This Original Code has been modified by IBM Corporation.
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* Modifications made by IBM described herein are
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* Copyright (c) International Business Machines
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* Corporation, 2000
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*
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* Modifications to Mozilla code or documentation
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* identified per MPL Section 3.3
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*
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* Date Modified by Description of modification
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* 05/03/2000 IBM Corp. Observer related defines for reflow
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*/
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/* a presentation of a document, part 2 */
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#ifndef nsIPresShell_h___
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#define nsIPresShell_h___
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#include "nsTHashtable.h"
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#include "nsHashKeys.h"
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#include "nsISupports.h"
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#include "nsQueryFrame.h"
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#include "nsCoord.h"
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#include "nsColor.h"
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#include "nsEvent.h"
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#include "nsCompatibility.h"
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#include "nsFrameManagerBase.h"
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#include "nsRect.h"
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#include "mozFlushType.h"
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#include "nsWeakReference.h"
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#include <stdio.h> // for FILE definition
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#include "nsChangeHint.h"
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#include "nsGUIEvent.h"
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#include "nsInterfaceHashtable.h"
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#include "nsEventStates.h"
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#include "nsPresArena.h"
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#include "nsIImageLoadingContent.h"
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class nsIContent;
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class nsIDocument;
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class nsIFrame;
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class nsPresContext;
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class nsStyleSet;
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class nsViewManager;
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class nsView;
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class nsRenderingContext;
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class nsIPageSequenceFrame;
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class nsAString;
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class nsCaret;
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class nsFrameSelection;
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class nsFrameManager;
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class nsILayoutHistoryState;
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class nsIReflowCallback;
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class nsIDOMNode;
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class nsIntRegion;
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class nsIStyleSheet;
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class nsCSSFrameConstructor;
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class nsISelection;
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template<class E> class nsCOMArray;
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class nsWeakFrame;
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class nsIScrollableFrame;
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class gfxASurface;
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class gfxContext;
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class nsIDOMEvent;
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class nsDisplayList;
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class nsDisplayListBuilder;
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class nsPIDOMWindow;
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struct nsPoint;
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struct nsIntPoint;
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struct nsIntRect;
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class nsRegion;
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class nsRefreshDriver;
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class nsARefreshObserver;
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#ifdef ACCESSIBILITY
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class nsAccessibilityService;
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namespace mozilla {
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namespace a11y {
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class DocAccessible;
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} // namespace a11y
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} // namespace mozilla
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#endif
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class nsIWidget;
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struct nsArenaMemoryStats;
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typedef short SelectionType;
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typedef uint64_t nsFrameState;
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namespace mozilla {
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class Selection;
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namespace dom {
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class Element;
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} // namespace dom
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namespace layers{
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class LayerManager;
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} // namespace layers
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} // namespace mozilla
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// Flags to pass to SetCapturingContent
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//
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// when assigning capture, ignore whether capture is allowed or not
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#define CAPTURE_IGNOREALLOWED 1
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// true if events should be targeted at the capturing content or its children
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#define CAPTURE_RETARGETTOELEMENT 2
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// true if the current capture wants drags to be prevented
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#define CAPTURE_PREVENTDRAG 4
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// true when the mouse is pointer locked, and events are sent to locked element
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#define CAPTURE_POINTERLOCK 8
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typedef struct CapturingContentInfo {
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// capture should only be allowed during a mousedown event
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bool mAllowed;
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bool mPointerLock;
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bool mRetargetToElement;
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bool mPreventDrag;
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nsIContent* mContent;
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} CapturingContentInfo;
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// bf539e0a-c314-4ea7-ba7c-ebd34e8a4065
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#define NS_IPRESSHELL_IID \
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{ 0xbf539e0a, 0xc314, 0x4ea7, \
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{ 0xba, 0x7c, 0xeb, 0xd3, 0x4e, 0x8a, 0x40, 0x65 } }
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// debug VerifyReflow flags
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#define VERIFY_REFLOW_ON 0x01
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#define VERIFY_REFLOW_NOISY 0x02
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#define VERIFY_REFLOW_ALL 0x04
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#define VERIFY_REFLOW_DUMP_COMMANDS 0x08
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#define VERIFY_REFLOW_NOISY_RC 0x10
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#define VERIFY_REFLOW_REALLY_NOISY_RC 0x20
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#define VERIFY_REFLOW_DURING_RESIZE_REFLOW 0x40
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#undef NOISY_INTERRUPTIBLE_REFLOW
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enum nsRectVisibility {
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nsRectVisibility_kVisible,
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nsRectVisibility_kAboveViewport,
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nsRectVisibility_kBelowViewport,
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nsRectVisibility_kLeftOfViewport,
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nsRectVisibility_kRightOfViewport
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};
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/**
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* Presentation shell interface. Presentation shells are the
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* controlling point for managing the presentation of a document. The
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* presentation shell holds a live reference to the document, the
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* presentation context, the style manager, the style set and the root
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* frame. <p>
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*
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* When this object is Release'd, it will release the document, the
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* presentation context, the style manager, the style set and the root
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* frame.
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*/
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// hack to make egcs / gcc 2.95.2 happy
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class nsIPresShell_base : public nsISupports
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{
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public:
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_IPRESSHELL_IID)
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(nsIPresShell_base, NS_IPRESSHELL_IID)
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class nsIPresShell : public nsIPresShell_base
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{
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protected:
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typedef mozilla::layers::LayerManager LayerManager;
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enum eRenderFlag {
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STATE_IGNORING_VIEWPORT_SCROLLING = 0x1
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};
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typedef uint8_t RenderFlags; // for storing the above flags
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public:
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virtual NS_HIDDEN_(nsresult) Init(nsIDocument* aDocument,
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nsPresContext* aPresContext,
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nsViewManager* aViewManager,
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nsStyleSet* aStyleSet,
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nsCompatibility aCompatMode) = 0;
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/**
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* All callers are responsible for calling |Destroy| after calling
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* |EndObservingDocument|. It needs to be separate only because form
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* controls incorrectly store their data in the frames rather than the
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* content model and printing calls |EndObservingDocument| multiple
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* times to make form controls behave nicely when printed.
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*/
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virtual NS_HIDDEN_(void) Destroy() = 0;
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bool IsDestroying() { return mIsDestroying; }
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/**
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* Make a one-way transition into a "zombie" state. In this state,
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* no reflow is done, no painting is done, and no refresh driver
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* ticks are processed. This is a dangerous state: it can leave
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* areas of the composition target unpainted if callers aren't
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* careful. (Don't let your zombie presshell out of the shed.)
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*
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* This is used in cases where a presshell is created for reasons
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* other than reflow/painting.
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*/
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virtual NS_HIDDEN_(void) MakeZombie() = 0;
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/**
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* All frames owned by the shell are allocated from an arena. They
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* are also recycled using free lists. Separate free lists are
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* maintained for each frame type (aID), which must always correspond
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* to the same aSize value. AllocateFrame returns zero-filled memory.
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* AllocateFrame is fallible, it returns nullptr on out-of-memory.
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*/
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void* AllocateFrame(nsQueryFrame::FrameIID aID, size_t aSize)
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{
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#ifdef DEBUG
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mPresArenaAllocCount++;
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#endif
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void* result = mFrameArena.AllocateByFrameID(aID, aSize);
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memset(result, 0, aSize);
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return result;
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}
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void FreeFrame(nsQueryFrame::FrameIID aID, void* aPtr)
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{
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#ifdef DEBUG
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mPresArenaAllocCount--;
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#endif
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if (PRESARENA_MUST_FREE_DURING_DESTROY || !mIsDestroying)
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mFrameArena.FreeByFrameID(aID, aPtr);
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}
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/**
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* This is for allocating other types of objects (not frames). Separate free
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* lists are maintained for each type (aID), which must always correspond to
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* the same aSize value. AllocateByObjectID returns zero-filled memory.
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* AllocateByObjectID is fallible, it returns nullptr on out-of-memory.
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*/
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void* AllocateByObjectID(nsPresArena::ObjectID aID, size_t aSize)
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{
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#ifdef DEBUG
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mPresArenaAllocCount++;
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#endif
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void* result = mFrameArena.AllocateByObjectID(aID, aSize);
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memset(result, 0, aSize);
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return result;
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}
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void FreeByObjectID(nsPresArena::ObjectID aID, void* aPtr)
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{
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#ifdef DEBUG
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mPresArenaAllocCount--;
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#endif
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if (PRESARENA_MUST_FREE_DURING_DESTROY || !mIsDestroying)
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mFrameArena.FreeByObjectID(aID, aPtr);
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}
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/**
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* Other objects closely related to the frame tree that are allocated
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* from a separate set of per-size free lists. Note that different types
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* of objects that has the same size are allocated from the same list.
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* AllocateMisc does *not* clear the memory that it returns.
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* AllocateMisc is fallible, it returns nullptr on out-of-memory.
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*
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* @deprecated use AllocateByObjectID/FreeByObjectID instead
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*/
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void* AllocateMisc(size_t aSize)
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{
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#ifdef DEBUG
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mPresArenaAllocCount++;
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#endif
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return mFrameArena.AllocateBySize(aSize);
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}
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void FreeMisc(size_t aSize, void* aPtr)
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{
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#ifdef DEBUG
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mPresArenaAllocCount--;
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#endif
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if (PRESARENA_MUST_FREE_DURING_DESTROY || !mIsDestroying)
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mFrameArena.FreeBySize(aSize, aPtr);
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}
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nsIDocument* GetDocument() const { return mDocument; }
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nsPresContext* GetPresContext() const { return mPresContext; }
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nsViewManager* GetViewManager() const { return mViewManager; }
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#ifdef ACCESSIBILITY
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/**
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* Return the document accessible for this pres shell if there is one.
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*/
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mozilla::a11y::DocAccessible* GetDocAccessible() const
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{
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return mDocAccessible;
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}
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/**
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* Set the document accessible for this pres shell.
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*/
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void SetDocAccessible(mozilla::a11y::DocAccessible* aDocAccessible)
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{
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mDocAccessible = aDocAccessible;
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}
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#endif
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#ifdef _IMPL_NS_LAYOUT
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nsStyleSet* StyleSet() const { return mStyleSet; }
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nsCSSFrameConstructor* FrameConstructor() const { return mFrameConstructor; }
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nsFrameManager* FrameManager() const {
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// reinterpret_cast is valid since nsFrameManager does not add
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// any members over nsFrameManagerBase.
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return reinterpret_cast<nsFrameManager*>
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(const_cast<nsIPresShell*>(this)->mFrameManager);
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}
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#endif
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/* Enable/disable author style level. Disabling author style disables the entire
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* author level of the cascade, including the HTML preshint level.
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*/
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// XXX these could easily be inlined, but there is a circular #include
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// problem with nsStyleSet.
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NS_HIDDEN_(void) SetAuthorStyleDisabled(bool aDisabled);
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NS_HIDDEN_(bool) GetAuthorStyleDisabled() const;
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/*
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* Called when stylesheets are added/removed/enabled/disabled to rebuild
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* all style data for a given pres shell without necessarily reconstructing
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* all of the frames. This will not reconstruct style synchronously; if
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* you need to do that, call FlushPendingNotifications to flush out style
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* reresolves.
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* // XXXbz why do we have this on the interface anyway? The only consumer
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* is calling AddOverrideStyleSheet/RemoveOverrideStyleSheet, and I think
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* those should just handle reconstructing style data...
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*/
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virtual NS_HIDDEN_(void) ReconstructStyleDataExternal();
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NS_HIDDEN_(void) ReconstructStyleDataInternal();
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#ifdef _IMPL_NS_LAYOUT
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void ReconstructStyleData() { ReconstructStyleDataInternal(); }
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#else
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void ReconstructStyleData() { ReconstructStyleDataExternal(); }
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#endif
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/** Setup all style rules required to implement preferences
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* - used for background/text/link colors and link underlining
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* may be extended for any prefs that are implemented via style rules
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* - aForceReflow argument is used to force a full reframe to make the rules show
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* (only used when the current page needs to reflect changed pref rules)
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*
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* - initially created for bugs 31816, 20760, 22963
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*/
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virtual NS_HIDDEN_(nsresult) SetPreferenceStyleRules(bool aForceReflow) = 0;
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/**
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* FrameSelection will return the Frame based selection API.
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* You cannot go back and forth anymore with QI between nsIDOM sel and
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* nsIFrame sel.
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*/
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already_AddRefed<nsFrameSelection> FrameSelection();
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/**
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* ConstFrameSelection returns an object which methods are safe to use for
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* example in nsIFrame code.
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*/
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const nsFrameSelection* ConstFrameSelection() const { return mSelection; }
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// Make shell be a document observer. If called after Destroy() has
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// been called on the shell, this will be ignored.
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virtual NS_HIDDEN_(void) BeginObservingDocument() = 0;
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// Make shell stop being a document observer
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virtual NS_HIDDEN_(void) EndObservingDocument() = 0;
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/**
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* Return whether Initialize() was previously called.
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*/
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bool DidInitialize() const { return mDidInitialize; }
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/**
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* Perform initialization. Constructs the frame for the root content
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* object and then enqueues a reflow of the frame model into the
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* specified width and height.
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*
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* The coordinates for aWidth and aHeight must be in standard nscoords.
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*
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* Callers of this method must hold a reference to this shell that
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* is guaranteed to survive through arbitrary script execution.
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* Calling Initialize can execute arbitrary script.
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*/
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virtual NS_HIDDEN_(nsresult) Initialize(nscoord aWidth, nscoord aHeight) = 0;
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/**
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* Reflow the frame model into a new width and height. The
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* coordinates for aWidth and aHeight must be in standard nscoord's.
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*/
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virtual NS_HIDDEN_(nsresult) ResizeReflow(nscoord aWidth, nscoord aHeight) = 0;
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/**
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* Reflow, and also change presshell state so as to only permit
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* reflowing off calls to ResizeReflowOverride() in the future.
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* ResizeReflow() calls are ignored after ResizeReflowOverride().
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*/
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virtual NS_HIDDEN_(nsresult) ResizeReflowOverride(nscoord aWidth, nscoord aHeight) = 0;
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/**
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* Returns true if ResizeReflowOverride has been called.
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*/
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virtual bool GetIsViewportOverridden() = 0;
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/**
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* Return true if the presshell expects layout flush.
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*/
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virtual bool IsLayoutFlushObserver() = 0;
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/**
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* Reflow the frame model with a reflow reason of eReflowReason_StyleChange
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*/
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virtual NS_HIDDEN_(void) StyleChangeReflow() = 0;
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/**
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* This calls through to the frame manager to get the root frame.
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*/
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virtual NS_HIDDEN_(nsIFrame*) GetRootFrameExternal() const;
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nsIFrame* GetRootFrame() const {
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#ifdef _IMPL_NS_LAYOUT
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return mFrameManager->GetRootFrame();
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#else
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return GetRootFrameExternal();
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#endif
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}
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/*
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* Get root scroll frame from FrameManager()->GetRootFrame().
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|
*/
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nsIFrame* GetRootScrollFrame() const;
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|
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/*
|
|
* The same as GetRootScrollFrame, but returns an nsIScrollableFrame
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|
*/
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nsIScrollableFrame* GetRootScrollFrameAsScrollable() const;
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|
|
/*
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* The same as GetRootScrollFrame, but returns an nsIScrollableFrame.
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|
* Can be called by code not linked into gklayout.
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*/
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virtual nsIScrollableFrame* GetRootScrollFrameAsScrollableExternal() const;
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|
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/*
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* Gets nearest scrollable frame from current focused content or DOM
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* selection if there is no focused content. The frame is scrollable with
|
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* overflow:scroll or overflow:auto in some direction when aDirection is
|
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* eEither. Otherwise, this returns a nearest frame that is scrollable in
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* the specified direction.
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*/
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enum ScrollDirection { eHorizontal, eVertical, eEither };
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nsIScrollableFrame* GetFrameToScrollAsScrollable(ScrollDirection aDirection);
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|
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/**
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* Returns the page sequence frame associated with the frame hierarchy.
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* Returns NULL if not a paginated view.
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*/
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virtual NS_HIDDEN_(nsIPageSequenceFrame*) GetPageSequenceFrame() const = 0;
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|
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/**
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* Gets the real primary frame associated with the content object.
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*
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* In the case of absolutely positioned elements and floated elements,
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* the real primary frame is the frame that is out of the flow and not the
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* placeholder frame.
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*/
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virtual NS_HIDDEN_(nsIFrame*) GetRealPrimaryFrameFor(nsIContent* aContent) const = 0;
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|
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/**
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* Gets the placeholder frame associated with the specified frame. This is
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* a helper frame that forwards the request to the frame manager.
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*/
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virtual NS_HIDDEN_(nsIFrame*) GetPlaceholderFrameFor(nsIFrame* aFrame) const = 0;
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/**
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* Tell the pres shell that a frame needs to be marked dirty and needs
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* Reflow. It's OK if this is an ancestor of the frame needing reflow as
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* long as the ancestor chain between them doesn't cross a reflow root. The
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* bit to add should be either NS_FRAME_IS_DIRTY or
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* NS_FRAME_HAS_DIRTY_CHILDREN (but not both!).
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*/
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enum IntrinsicDirty {
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// XXXldb eResize should be renamed
|
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eResize, // don't mark any intrinsic widths dirty
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eTreeChange, // mark intrinsic widths dirty on aFrame and its ancestors
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eStyleChange // Do eTreeChange, plus all of aFrame's descendants
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};
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virtual NS_HIDDEN_(void) FrameNeedsReflow(nsIFrame *aFrame,
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IntrinsicDirty aIntrinsicDirty,
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nsFrameState aBitToAdd) = 0;
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|
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/**
|
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* Calls FrameNeedsReflow on all fixed position children of the root frame.
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*/
|
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virtual void MarkFixedFramesForReflow(IntrinsicDirty aIntrinsicDirty);
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|
|
/**
|
|
* Tell the presshell that the given frame's reflow was interrupted. This
|
|
* will mark as having dirty children a path from the given frame (inclusive)
|
|
* to the nearest ancestor with a dirty subtree, or to the reflow root
|
|
* currently being reflowed if no such ancestor exists (inclusive). This is
|
|
* to be done immediately after reflow of the current reflow root completes.
|
|
* This method must only be called during reflow, and the frame it's being
|
|
* called on must be in the process of being reflowed when it's called. This
|
|
* method doesn't mark any intrinsic widths dirty and doesn't add any bits
|
|
* other than NS_FRAME_HAS_DIRTY_CHILDREN.
|
|
*/
|
|
virtual NS_HIDDEN_(void) FrameNeedsToContinueReflow(nsIFrame *aFrame) = 0;
|
|
|
|
virtual NS_HIDDEN_(void) CancelAllPendingReflows() = 0;
|
|
|
|
/**
|
|
* Recreates the frames for a node
|
|
*/
|
|
virtual NS_HIDDEN_(nsresult) RecreateFramesFor(nsIContent* aContent) = 0;
|
|
|
|
void PostRecreateFramesFor(mozilla::dom::Element* aElement);
|
|
void RestyleForAnimation(mozilla::dom::Element* aElement,
|
|
nsRestyleHint aHint);
|
|
|
|
/**
|
|
* Determine if it is safe to flush all pending notifications
|
|
* @param aIsSafeToFlush true if it is safe, false otherwise.
|
|
*
|
|
*/
|
|
virtual NS_HIDDEN_(bool) IsSafeToFlush() const = 0;
|
|
|
|
/**
|
|
* Flush pending notifications of the type specified. This method
|
|
* will not affect the content model; it'll just affect style and
|
|
* frames. Callers that actually want up-to-date presentation (other
|
|
* than the document itself) should probably be calling
|
|
* nsIDocument::FlushPendingNotifications.
|
|
*
|
|
* @param aType the type of notifications to flush
|
|
*/
|
|
virtual NS_HIDDEN_(void) FlushPendingNotifications(mozFlushType aType) = 0;
|
|
virtual NS_HIDDEN_(void) FlushPendingNotifications(mozilla::ChangesToFlush aType) = 0;
|
|
|
|
/**
|
|
* Callbacks will be called even if reflow itself fails for
|
|
* some reason.
|
|
*/
|
|
virtual NS_HIDDEN_(nsresult) PostReflowCallback(nsIReflowCallback* aCallback) = 0;
|
|
virtual NS_HIDDEN_(void) CancelReflowCallback(nsIReflowCallback* aCallback) = 0;
|
|
|
|
virtual NS_HIDDEN_(void) ClearFrameRefs(nsIFrame* aFrame) = 0;
|
|
|
|
/**
|
|
* Get a reference rendering context. This is a context that should not
|
|
* be rendered to, but is suitable for measuring text and performing
|
|
* other non-rendering operations.
|
|
*/
|
|
virtual already_AddRefed<nsRenderingContext> GetReferenceRenderingContext() = 0;
|
|
|
|
/**
|
|
* Informs the pres shell that the document is now at the anchor with
|
|
* the given name. If |aScroll| is true, scrolls the view of the
|
|
* document so that the anchor with the specified name is displayed at
|
|
* the top of the window. If |aAnchorName| is empty, then this informs
|
|
* the pres shell that there is no current target, and |aScroll| must
|
|
* be false.
|
|
*/
|
|
virtual NS_HIDDEN_(nsresult) GoToAnchor(const nsAString& aAnchorName, bool aScroll) = 0;
|
|
|
|
/**
|
|
* Tells the presshell to scroll again to the last anchor scrolled to by
|
|
* GoToAnchor, if any. This scroll only happens if the scroll
|
|
* position has not changed since the last GoToAnchor. This is called
|
|
* by nsDocumentViewer::LoadComplete. This clears the last anchor
|
|
* scrolled to by GoToAnchor (we don't want to keep it alive if it's
|
|
* removed from the DOM), so don't call this more than once.
|
|
*/
|
|
virtual NS_HIDDEN_(nsresult) ScrollToAnchor() = 0;
|
|
|
|
enum {
|
|
SCROLL_TOP = 0,
|
|
SCROLL_BOTTOM = 100,
|
|
SCROLL_LEFT = 0,
|
|
SCROLL_RIGHT = 100,
|
|
SCROLL_CENTER = 50,
|
|
SCROLL_MINIMUM = -1
|
|
};
|
|
|
|
enum WhenToScroll {
|
|
SCROLL_ALWAYS,
|
|
SCROLL_IF_NOT_VISIBLE,
|
|
SCROLL_IF_NOT_FULLY_VISIBLE
|
|
};
|
|
typedef struct ScrollAxis {
|
|
int16_t mWhereToScroll;
|
|
WhenToScroll mWhenToScroll : 8;
|
|
bool mOnlyIfPerceivedScrollableDirection : 1;
|
|
/**
|
|
* @param aWhere: Either a percentage or a special value.
|
|
* nsIPresShell defines:
|
|
* * (Default) SCROLL_MINIMUM = -1: The visible area is
|
|
* scrolled to show the entire frame. If the frame is too
|
|
* large, the top and left edges are given precedence.
|
|
* * SCROLL_TOP = 0: The frame's upper edge is aligned with the
|
|
* top edge of the visible area.
|
|
* * SCROLL_BOTTOM = 100: The frame's bottom edge is aligned
|
|
* with the bottom edge of the visible area.
|
|
* * SCROLL_LEFT = 0: The frame's left edge is aligned with the
|
|
* left edge of the visible area.
|
|
* * SCROLL_RIGHT = 100: The frame's right edge is aligned with
|
|
* the right edge of the visible area.
|
|
* * SCROLL_CENTER = 50: The frame is centered along the axis
|
|
* the ScrollAxis is used for.
|
|
*
|
|
* Other values are treated as a percentage, and the point
|
|
* "percent" down the frame is placed at the point "percent"
|
|
* down the visible area.
|
|
* @param aWhen:
|
|
* * (Default) SCROLL_IF_NOT_FULLY_VISIBLE: Move the frame only
|
|
* if it is not fully visible (including if it's not visible
|
|
* at all). Note that in this case if the frame is too large to
|
|
* fit in view, it will only be scrolled if more of it can fit
|
|
* than is already in view.
|
|
* * SCROLL_IF_NOT_VISIBLE: Move the frame only if none of it
|
|
* is visible.
|
|
* * SCROLL_ALWAYS: Move the frame regardless of its current
|
|
* visibility.
|
|
* @param aOnlyIfPerceivedScrollableDirection:
|
|
* If the direction is not a perceived scrollable direction (i.e.
|
|
* no scrollbar showing and less than one device pixel of
|
|
* scrollable distance), don't scroll. Defaults to false.
|
|
*/
|
|
ScrollAxis(int16_t aWhere = SCROLL_MINIMUM,
|
|
WhenToScroll aWhen = SCROLL_IF_NOT_FULLY_VISIBLE,
|
|
bool aOnlyIfPerceivedScrollableDirection = false) :
|
|
mWhereToScroll(aWhere), mWhenToScroll(aWhen),
|
|
mOnlyIfPerceivedScrollableDirection(aOnlyIfPerceivedScrollableDirection)
|
|
{}
|
|
} ScrollAxis;
|
|
/**
|
|
* Scrolls the view of the document so that the primary frame of the content
|
|
* is displayed in the window. Layout is flushed before scrolling.
|
|
*
|
|
* @param aContent The content object of which primary frame should be
|
|
* scrolled into view.
|
|
* @param aVertical How to align the frame vertically and when to do so.
|
|
* This is a ScrollAxis of Where and When.
|
|
* @param aHorizontal How to align the frame horizontally and when to do so.
|
|
* This is a ScrollAxis of Where and When.
|
|
* @param aFlags If SCROLL_FIRST_ANCESTOR_ONLY is set, only the nearest
|
|
* scrollable ancestor is scrolled, otherwise all
|
|
* scrollable ancestors may be scrolled if necessary.
|
|
* If SCROLL_OVERFLOW_HIDDEN is set then we may scroll in a
|
|
* direction even if overflow:hidden is specified in that
|
|
* direction; otherwise we will not scroll in that direction
|
|
* when overflow:hidden is set for that direction.
|
|
* If SCROLL_NO_PARENT_FRAMES is set then we only scroll
|
|
* nodes in this document, not in any parent documents which
|
|
* contain this document in a iframe or the like.
|
|
*/
|
|
virtual NS_HIDDEN_(nsresult) ScrollContentIntoView(nsIContent* aContent,
|
|
ScrollAxis aVertical,
|
|
ScrollAxis aHorizontal,
|
|
uint32_t aFlags) = 0;
|
|
|
|
enum {
|
|
SCROLL_FIRST_ANCESTOR_ONLY = 0x01,
|
|
SCROLL_OVERFLOW_HIDDEN = 0x02,
|
|
SCROLL_NO_PARENT_FRAMES = 0x04
|
|
};
|
|
/**
|
|
* Scrolls the view of the document so that the given area of a frame
|
|
* is visible, if possible. Layout is not flushed before scrolling.
|
|
*
|
|
* @param aRect relative to aFrame
|
|
* @param aVertical see ScrollContentIntoView and ScrollAxis
|
|
* @param aHorizontal see ScrollContentIntoView and ScrollAxis
|
|
* @param aFlags if SCROLL_FIRST_ANCESTOR_ONLY is set, only the
|
|
* nearest scrollable ancestor is scrolled, otherwise all
|
|
* scrollable ancestors may be scrolled if necessary
|
|
* if SCROLL_OVERFLOW_HIDDEN is set then we may scroll in a direction
|
|
* even if overflow:hidden is specified in that direction; otherwise
|
|
* we will not scroll in that direction when overflow:hidden is
|
|
* set for that direction
|
|
* If SCROLL_NO_PARENT_FRAMES is set then we only scroll
|
|
* nodes in this document, not in any parent documents which
|
|
* contain this document in a iframe or the like.
|
|
* @return true if any scrolling happened, false if no scrolling happened
|
|
*/
|
|
virtual bool ScrollFrameRectIntoView(nsIFrame* aFrame,
|
|
const nsRect& aRect,
|
|
ScrollAxis aVertical,
|
|
ScrollAxis aHorizontal,
|
|
uint32_t aFlags) = 0;
|
|
|
|
/**
|
|
* Determine if a rectangle specified in the frame's coordinate system
|
|
* intersects the viewport "enough" to be considered visible.
|
|
* @param aFrame frame that aRect coordinates are specified relative to
|
|
* @param aRect rectangle in twips to test for visibility
|
|
* @param aMinTwips is the minimum distance in from the edge of the viewport
|
|
* that an object must be to be counted visible
|
|
* @return nsRectVisibility_kVisible if the rect is visible
|
|
* nsRectVisibility_kAboveViewport
|
|
* nsRectVisibility_kBelowViewport
|
|
* nsRectVisibility_kLeftOfViewport
|
|
* nsRectVisibility_kRightOfViewport rectangle is outside the viewport
|
|
* in the specified direction
|
|
*/
|
|
virtual nsRectVisibility GetRectVisibility(nsIFrame *aFrame,
|
|
const nsRect &aRect,
|
|
nscoord aMinTwips) const = 0;
|
|
|
|
/**
|
|
* Suppress notification of the frame manager that frames are
|
|
* being destroyed.
|
|
*/
|
|
virtual NS_HIDDEN_(void) SetIgnoreFrameDestruction(bool aIgnore) = 0;
|
|
|
|
/**
|
|
* Notification sent by a frame informing the pres shell that it is about to
|
|
* be destroyed.
|
|
* This allows any outstanding references to the frame to be cleaned up
|
|
*/
|
|
virtual NS_HIDDEN_(void) NotifyDestroyingFrame(nsIFrame* aFrame) = 0;
|
|
|
|
/**
|
|
* Get the caret, if it exists. AddRefs it.
|
|
*/
|
|
virtual NS_HIDDEN_(already_AddRefed<nsCaret>) GetCaret() const = 0;
|
|
|
|
/**
|
|
* Invalidate the caret's current position if it's outside of its frame's
|
|
* boundaries. This function is useful if you're batching selection
|
|
* notifications and might remove the caret's frame out from under it.
|
|
*/
|
|
virtual NS_HIDDEN_(void) MaybeInvalidateCaretPosition() = 0;
|
|
|
|
/**
|
|
* Set the current caret to a new caret. To undo this, call RestoreCaret.
|
|
*/
|
|
virtual void SetCaret(nsCaret *aNewCaret) = 0;
|
|
|
|
/**
|
|
* Restore the caret to the original caret that this pres shell was created
|
|
* with.
|
|
*/
|
|
virtual void RestoreCaret() = 0;
|
|
|
|
/**
|
|
* Should the images have borders etc. Actual visual effects are determined
|
|
* by the frames. Visual effects may not effect layout, only display.
|
|
* Takes effect on next repaint, does not force a repaint itself.
|
|
*
|
|
* @param aInEnable if true, visual selection effects are enabled
|
|
* if false visual selection effects are disabled
|
|
*/
|
|
NS_IMETHOD SetSelectionFlags(int16_t aInEnable) = 0;
|
|
|
|
/**
|
|
* Gets the current state of non text selection effects
|
|
* @return current state of non text selection,
|
|
* as set by SetDisplayNonTextSelection
|
|
*/
|
|
int16_t GetSelectionFlags() const { return mSelectionFlags; }
|
|
|
|
virtual mozilla::Selection* GetCurrentSelection(SelectionType aType) = 0;
|
|
|
|
/**
|
|
* Interface to dispatch events via the presshell
|
|
* @note The caller must have a strong reference to the PresShell.
|
|
*/
|
|
virtual NS_HIDDEN_(nsresult) HandleEventWithTarget(nsEvent* aEvent,
|
|
nsIFrame* aFrame,
|
|
nsIContent* aContent,
|
|
nsEventStatus* aStatus) = 0;
|
|
|
|
/**
|
|
* Dispatch event to content only (NOT full processing)
|
|
* @note The caller must have a strong reference to the PresShell.
|
|
*/
|
|
virtual NS_HIDDEN_(nsresult) HandleDOMEventWithTarget(nsIContent* aTargetContent,
|
|
nsEvent* aEvent,
|
|
nsEventStatus* aStatus) = 0;
|
|
|
|
/**
|
|
* Dispatch event to content only (NOT full processing)
|
|
* @note The caller must have a strong reference to the PresShell.
|
|
*/
|
|
virtual NS_HIDDEN_(nsresult) HandleDOMEventWithTarget(nsIContent* aTargetContent,
|
|
nsIDOMEvent* aEvent,
|
|
nsEventStatus* aStatus) = 0;
|
|
|
|
/**
|
|
* Gets the current target event frame from the PresShell
|
|
*/
|
|
virtual NS_HIDDEN_(nsIFrame*) GetEventTargetFrame() = 0;
|
|
|
|
/**
|
|
* Gets the current target event frame from the PresShell
|
|
*/
|
|
virtual NS_HIDDEN_(already_AddRefed<nsIContent>) GetEventTargetContent(nsEvent* aEvent) = 0;
|
|
|
|
/**
|
|
* Get and set the history state for the current document
|
|
*/
|
|
|
|
virtual NS_HIDDEN_(nsresult) CaptureHistoryState(nsILayoutHistoryState** aLayoutHistoryState) = 0;
|
|
|
|
/**
|
|
* Determine if reflow is currently locked
|
|
* returns true if reflow is locked, false otherwise
|
|
*/
|
|
bool IsReflowLocked() const { return mIsReflowing; }
|
|
|
|
/**
|
|
* Called to find out if painting is suppressed for this presshell. If it is suppressd,
|
|
* we don't allow the painting of any layer but the background, and we don't
|
|
* recur into our children.
|
|
*/
|
|
bool IsPaintingSuppressed() const { return mPaintingSuppressed; }
|
|
|
|
/**
|
|
* Unsuppress painting.
|
|
*/
|
|
virtual NS_HIDDEN_(void) UnsuppressPainting() = 0;
|
|
|
|
/**
|
|
* Called to disable nsITheme support in a specific presshell.
|
|
*/
|
|
void DisableThemeSupport()
|
|
{
|
|
// Doesn't have to be dynamic. Just set the bool.
|
|
mIsThemeSupportDisabled = true;
|
|
}
|
|
|
|
/**
|
|
* Indicates whether theme support is enabled.
|
|
*/
|
|
bool IsThemeSupportEnabled() const { return !mIsThemeSupportDisabled; }
|
|
|
|
/**
|
|
* Get the set of agent style sheets for this presentation
|
|
*/
|
|
virtual nsresult GetAgentStyleSheets(nsCOMArray<nsIStyleSheet>& aSheets) = 0;
|
|
|
|
/**
|
|
* Replace the set of agent style sheets
|
|
*/
|
|
virtual nsresult SetAgentStyleSheets(const nsCOMArray<nsIStyleSheet>& aSheets) = 0;
|
|
|
|
/**
|
|
* Add an override style sheet for this presentation
|
|
*/
|
|
virtual nsresult AddOverrideStyleSheet(nsIStyleSheet *aSheet) = 0;
|
|
|
|
/**
|
|
* Remove an override style sheet
|
|
*/
|
|
virtual nsresult RemoveOverrideStyleSheet(nsIStyleSheet *aSheet) = 0;
|
|
|
|
/**
|
|
* Reconstruct frames for all elements in the document
|
|
*/
|
|
virtual nsresult ReconstructFrames() = 0;
|
|
|
|
/**
|
|
* Notify that a content node's state has changed
|
|
*/
|
|
virtual void ContentStateChanged(nsIDocument* aDocument,
|
|
nsIContent* aContent,
|
|
nsEventStates aStateMask) = 0;
|
|
|
|
/**
|
|
* See if reflow verification is enabled. To enable reflow verification add
|
|
* "verifyreflow:1" to your NSPR_LOG_MODULES environment variable
|
|
* (any non-zero debug level will work). Or, call SetVerifyReflowEnable
|
|
* with true.
|
|
*/
|
|
static bool GetVerifyReflowEnable();
|
|
|
|
/**
|
|
* Set the verify-reflow enable flag.
|
|
*/
|
|
static void SetVerifyReflowEnable(bool aEnabled);
|
|
|
|
virtual nsIFrame* GetAbsoluteContainingBlock(nsIFrame* aFrame);
|
|
|
|
#ifdef MOZ_REFLOW_PERF
|
|
virtual NS_HIDDEN_(void) DumpReflows() = 0;
|
|
virtual NS_HIDDEN_(void) CountReflows(const char * aName, nsIFrame * aFrame) = 0;
|
|
virtual NS_HIDDEN_(void) PaintCount(const char * aName,
|
|
nsRenderingContext* aRenderingContext,
|
|
nsPresContext * aPresContext,
|
|
nsIFrame * aFrame,
|
|
const nsPoint& aOffset,
|
|
uint32_t aColor) = 0;
|
|
virtual NS_HIDDEN_(void) SetPaintFrameCount(bool aOn) = 0;
|
|
virtual bool IsPaintingFrameCounts() = 0;
|
|
#endif
|
|
|
|
#ifdef DEBUG
|
|
// Debugging hooks
|
|
virtual void ListStyleContexts(nsIFrame *aRootFrame, FILE *out,
|
|
int32_t aIndent = 0) = 0;
|
|
|
|
virtual void ListStyleSheets(FILE *out, int32_t aIndent = 0) = 0;
|
|
virtual void VerifyStyleTree() = 0;
|
|
#endif
|
|
|
|
#ifdef ACCESSIBILITY
|
|
/**
|
|
* Return true if accessibility is active.
|
|
*/
|
|
static bool IsAccessibilityActive();
|
|
|
|
/**
|
|
* Return accessibility service if accessibility is active.
|
|
*/
|
|
static nsAccessibilityService* AccService();
|
|
#endif
|
|
|
|
/**
|
|
* Stop all active elements (plugins and the caret) in this presentation and
|
|
* in the presentations of subdocuments. Resets painting to a suppressed state.
|
|
* XXX this should include image animations
|
|
*/
|
|
virtual void Freeze() = 0;
|
|
bool IsFrozen() { return mFrozen; }
|
|
|
|
/**
|
|
* Restarts active elements (plugins) in this presentation and in the
|
|
* presentations of subdocuments, then do a full invalidate of the content area.
|
|
*/
|
|
virtual void Thaw() = 0;
|
|
|
|
virtual void FireOrClearDelayedEvents(bool aFireEvents) = 0;
|
|
|
|
/**
|
|
* When this shell is disconnected from its containing docshell, we
|
|
* lose our container pointer. However, we'd still like to be able to target
|
|
* user events at the docshell's parent. This pointer allows us to do that.
|
|
* It should not be used for any other purpose.
|
|
*/
|
|
void SetForwardingContainer(nsWeakPtr aContainer)
|
|
{
|
|
mForwardingContainer = aContainer;
|
|
}
|
|
|
|
/**
|
|
* Render the document into an arbitrary gfxContext
|
|
* Designed for getting a picture of a document or a piece of a document
|
|
* Note that callers will generally want to call FlushPendingNotifications
|
|
* to get an up-to-date view of the document
|
|
* @param aRect is the region to capture into the offscreen buffer, in the
|
|
* root frame's coordinate system (if aIgnoreViewportScrolling is false)
|
|
* or in the root scrolled frame's coordinate system
|
|
* (if aIgnoreViewportScrolling is true). The coordinates are in appunits.
|
|
* @param aFlags see below;
|
|
* set RENDER_IS_UNTRUSTED if the contents may be passed to malicious
|
|
* agents. E.g. we might choose not to paint the contents of sensitive widgets
|
|
* such as the file name in a file upload widget, and we might choose not
|
|
* to paint themes.
|
|
* set RENDER_IGNORE_VIEWPORT_SCROLLING to ignore
|
|
* clipping/scrolling/scrollbar painting due to scrolling in the viewport
|
|
* set RENDER_CARET to draw the caret if one would be visible
|
|
* (by default the caret is never drawn)
|
|
* set RENDER_USE_LAYER_MANAGER to force rendering to go through
|
|
* the layer manager for the window. This may be unexpectedly slow
|
|
* (if the layer manager must read back data from the GPU) or low-quality
|
|
* (if the layer manager reads back pixel data and scales it
|
|
* instead of rendering using the appropriate scaling). It may also
|
|
* slow everything down if the area rendered does not correspond to the
|
|
* normal visible area of the window.
|
|
* set RENDER_ASYNC_DECODE_IMAGES to avoid having images synchronously
|
|
* decoded during rendering.
|
|
* (by default images decode synchronously with RenderDocument)
|
|
* set RENDER_DOCUMENT_RELATIVE to interpret |aRect| relative to the
|
|
* document instead of the CSS viewport
|
|
* @param aBackgroundColor a background color to render onto
|
|
* @param aRenderedContext the gfxContext to render to. We render so that
|
|
* one CSS pixel in the source document is rendered to one unit in the current
|
|
* transform.
|
|
*/
|
|
enum {
|
|
RENDER_IS_UNTRUSTED = 0x01,
|
|
RENDER_IGNORE_VIEWPORT_SCROLLING = 0x02,
|
|
RENDER_CARET = 0x04,
|
|
RENDER_USE_WIDGET_LAYERS = 0x08,
|
|
RENDER_ASYNC_DECODE_IMAGES = 0x10,
|
|
RENDER_DOCUMENT_RELATIVE = 0x20
|
|
};
|
|
virtual NS_HIDDEN_(nsresult) RenderDocument(const nsRect& aRect, uint32_t aFlags,
|
|
nscolor aBackgroundColor,
|
|
gfxContext* aRenderedContext) = 0;
|
|
|
|
/**
|
|
* Renders a node aNode to a surface and returns it. The aRegion may be used
|
|
* to clip the rendering. This region is measured in CSS pixels from the
|
|
* edge of the presshell area. The aPoint, aScreenRect and aSurface
|
|
* arguments function in a similar manner as RenderSelection.
|
|
*/
|
|
virtual already_AddRefed<gfxASurface> RenderNode(nsIDOMNode* aNode,
|
|
nsIntRegion* aRegion,
|
|
nsIntPoint& aPoint,
|
|
nsIntRect* aScreenRect) = 0;
|
|
|
|
/**
|
|
* Renders a selection to a surface and returns it. This method is primarily
|
|
* intended to create the drag feedback when dragging a selection.
|
|
*
|
|
* aScreenRect will be filled in with the bounding rectangle of the
|
|
* selection area on screen.
|
|
*
|
|
* If the area of the selection is large, the image will be scaled down.
|
|
* The argument aPoint is used in this case as a reference point when
|
|
* determining the new screen rectangle after scaling. Typically, this
|
|
* will be the mouse position, so that the screen rectangle is positioned
|
|
* such that the mouse is over the same point in the scaled image as in
|
|
* the original. When scaling does not occur, the mouse point isn't used
|
|
* as the position can be determined from the displayed frames.
|
|
*/
|
|
virtual already_AddRefed<gfxASurface> RenderSelection(nsISelection* aSelection,
|
|
nsIntPoint& aPoint,
|
|
nsIntRect* aScreenRect) = 0;
|
|
|
|
void AddWeakFrameInternal(nsWeakFrame* aWeakFrame);
|
|
virtual void AddWeakFrameExternal(nsWeakFrame* aWeakFrame);
|
|
|
|
void AddWeakFrame(nsWeakFrame* aWeakFrame)
|
|
{
|
|
#ifdef _IMPL_NS_LAYOUT
|
|
AddWeakFrameInternal(aWeakFrame);
|
|
#else
|
|
AddWeakFrameExternal(aWeakFrame);
|
|
#endif
|
|
}
|
|
|
|
void RemoveWeakFrameInternal(nsWeakFrame* aWeakFrame);
|
|
virtual void RemoveWeakFrameExternal(nsWeakFrame* aWeakFrame);
|
|
|
|
void RemoveWeakFrame(nsWeakFrame* aWeakFrame)
|
|
{
|
|
#ifdef _IMPL_NS_LAYOUT
|
|
RemoveWeakFrameInternal(aWeakFrame);
|
|
#else
|
|
RemoveWeakFrameExternal(aWeakFrame);
|
|
#endif
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
nsIFrame* GetDrawEventTargetFrame() { return mDrawEventTargetFrame; }
|
|
#endif
|
|
|
|
/**
|
|
* Stop or restart non synthetic test mouse event handling on *all*
|
|
* presShells.
|
|
*
|
|
* @param aDisable If true, disable all non synthetic test mouse
|
|
* events on all presShells. Otherwise, enable them.
|
|
*/
|
|
virtual NS_HIDDEN_(void) DisableNonTestMouseEvents(bool aDisable) = 0;
|
|
|
|
/**
|
|
* Record the background color of the most recently drawn canvas. This color
|
|
* is composited on top of the user's default background color and then used
|
|
* to draw the background color of the canvas. See PresShell::Paint,
|
|
* PresShell::PaintDefaultBackground, and nsDocShell::SetupNewViewer;
|
|
* bug 488242, bug 476557 and other bugs mentioned there.
|
|
*/
|
|
void SetCanvasBackground(nscolor aColor) { mCanvasBackgroundColor = aColor; }
|
|
nscolor GetCanvasBackground() { return mCanvasBackgroundColor; }
|
|
|
|
/**
|
|
* Use the current frame tree (if it exists) to update the background
|
|
* color of the most recently drawn canvas.
|
|
*/
|
|
virtual void UpdateCanvasBackground() = 0;
|
|
|
|
/**
|
|
* Add a solid color item to the bottom of aList with frame aFrame and bounds
|
|
* aBounds. Checks first if this needs to be done by checking if aFrame is a
|
|
* canvas frame (if the FORCE_DRAW flag is passed then this check is skipped).
|
|
* aBackstopColor is composed behind the background color of the canvas, it is
|
|
* transparent by default.
|
|
*/
|
|
enum {
|
|
FORCE_DRAW = 0x01
|
|
};
|
|
virtual void AddCanvasBackgroundColorItem(nsDisplayListBuilder& aBuilder,
|
|
nsDisplayList& aList,
|
|
nsIFrame* aFrame,
|
|
const nsRect& aBounds,
|
|
nscolor aBackstopColor = NS_RGBA(0,0,0,0),
|
|
uint32_t aFlags = 0) = 0;
|
|
|
|
|
|
/**
|
|
* Add a solid color item to the bottom of aList with frame aFrame and
|
|
* bounds aBounds representing the dark grey background behind the page of a
|
|
* print preview presentation.
|
|
*/
|
|
virtual void AddPrintPreviewBackgroundItem(nsDisplayListBuilder& aBuilder,
|
|
nsDisplayList& aList,
|
|
nsIFrame* aFrame,
|
|
const nsRect& aBounds) = 0;
|
|
|
|
/**
|
|
* Computes the backstop color for the view: transparent if in a transparent
|
|
* widget, otherwise the PresContext default background color. This color is
|
|
* only visible if the contents of the view as a whole are translucent.
|
|
*/
|
|
virtual nscolor ComputeBackstopColor(nsView* aDisplayRoot) = 0;
|
|
|
|
void ObserveNativeAnonMutationsForPrint(bool aObserve)
|
|
{
|
|
mObservesMutationsForPrint = aObserve;
|
|
}
|
|
bool ObservesNativeAnonMutationsForPrint()
|
|
{
|
|
return mObservesMutationsForPrint;
|
|
}
|
|
|
|
virtual nsresult SetIsActive(bool aIsActive) = 0;
|
|
|
|
bool IsActive()
|
|
{
|
|
return mIsActive;
|
|
}
|
|
|
|
// mouse capturing
|
|
|
|
static CapturingContentInfo gCaptureInfo;
|
|
|
|
static nsInterfaceHashtable<nsUint32HashKey, nsIDOMTouch> gCaptureTouchList;
|
|
static bool gPreventMouseEvents;
|
|
|
|
/**
|
|
* When capturing content is set, it traps all mouse events and retargets
|
|
* them at this content node. If capturing is not allowed
|
|
* (gCaptureInfo.mAllowed is false), then capturing is not set. However, if
|
|
* the CAPTURE_IGNOREALLOWED flag is set, the allowed state is ignored and
|
|
* capturing is set regardless. To disable capture, pass null for the value
|
|
* of aContent.
|
|
*
|
|
* If CAPTURE_RETARGETTOELEMENT is set, all mouse events are targeted at
|
|
* aContent only. Otherwise, mouse events are targeted at aContent or its
|
|
* descendants. That is, descendants of aContent receive mouse events as
|
|
* they normally would, but mouse events outside of aContent are retargeted
|
|
* to aContent.
|
|
*
|
|
* If CAPTURE_PREVENTDRAG is set then drags are prevented from starting while
|
|
* this capture is active.
|
|
*
|
|
* If CAPTURE_POINTERLOCK is set, similar to CAPTURE_RETARGETTOELEMENT, then
|
|
* events are targeted at aContent, but capturing is held more strongly (i.e.,
|
|
* calls to SetCapturingContent won't unlock unless CAPTURE_POINTERLOCK is
|
|
* set again).
|
|
*/
|
|
static void SetCapturingContent(nsIContent* aContent, uint8_t aFlags);
|
|
|
|
/**
|
|
* Return the active content currently capturing the mouse if any.
|
|
*/
|
|
static nsIContent* GetCapturingContent()
|
|
{
|
|
return gCaptureInfo.mContent;
|
|
}
|
|
|
|
/**
|
|
* Allow or disallow mouse capturing.
|
|
*/
|
|
static void AllowMouseCapture(bool aAllowed)
|
|
{
|
|
gCaptureInfo.mAllowed = aAllowed;
|
|
}
|
|
|
|
/**
|
|
* Returns true if there is an active mouse capture that wants to prevent
|
|
* drags.
|
|
*/
|
|
static bool IsMouseCapturePreventingDrag()
|
|
{
|
|
return gCaptureInfo.mPreventDrag && gCaptureInfo.mContent;
|
|
}
|
|
|
|
/**
|
|
* Keep track of how many times this presshell has been rendered to
|
|
* a window.
|
|
*/
|
|
uint64_t GetPaintCount() { return mPaintCount; }
|
|
void IncrementPaintCount() { ++mPaintCount; }
|
|
|
|
/**
|
|
* Get the root DOM window of this presShell.
|
|
*/
|
|
virtual already_AddRefed<nsPIDOMWindow> GetRootWindow() = 0;
|
|
|
|
/**
|
|
* Get the layer manager for the widget of the root view, if it has
|
|
* one.
|
|
*/
|
|
virtual LayerManager* GetLayerManager() = 0;
|
|
|
|
/**
|
|
* Track whether we're ignoring viewport scrolling for the purposes
|
|
* of painting. If we are ignoring, then layers aren't clipped to
|
|
* the CSS viewport and scrollbars aren't drawn.
|
|
*/
|
|
virtual void SetIgnoreViewportScrolling(bool aIgnore) = 0;
|
|
bool IgnoringViewportScrolling() const
|
|
{ return mRenderFlags & STATE_IGNORING_VIEWPORT_SCROLLING; }
|
|
|
|
/**
|
|
* Set a "resolution" for the document, which if not 1.0 will
|
|
* allocate more or fewer pixels for rescalable content by a factor
|
|
* of |resolution| in both dimensions. Return NS_OK iff the
|
|
* resolution bounds are sane, and the resolution of this was
|
|
* actually updated.
|
|
*
|
|
* The resolution defaults to 1.0.
|
|
*/
|
|
virtual nsresult SetResolution(float aXResolution, float aYResolution) = 0;
|
|
gfxSize GetResolution() { return gfxSize(mXResolution, mYResolution); }
|
|
float GetXResolution() { return mXResolution; }
|
|
float GetYResolution() { return mYResolution; }
|
|
|
|
/**
|
|
* Set the isFirstPaint flag.
|
|
*/
|
|
void SetIsFirstPaint(bool aIsFirstPaint) { mIsFirstPaint = aIsFirstPaint; }
|
|
|
|
/**
|
|
* Get the isFirstPaint flag.
|
|
*/
|
|
bool GetIsFirstPaint() const { return mIsFirstPaint; }
|
|
|
|
/**
|
|
* Dispatch a mouse move event based on the most recent mouse position if
|
|
* this PresShell is visible. This is used when the contents of the page
|
|
* moved (aFromScroll is false) or scrolled (aFromScroll is true).
|
|
*/
|
|
virtual void SynthesizeMouseMove(bool aFromScroll) = 0;
|
|
|
|
enum PaintFlags {
|
|
/* Update the layer tree and paint ThebesLayers. If this is not specified,
|
|
* we may still have to do it if the layer tree lost ThebesLayer contents
|
|
* we need for compositing. */
|
|
PAINT_LAYERS = 0x01,
|
|
/* Composite layers to the window. */
|
|
PAINT_COMPOSITE = 0x02,
|
|
};
|
|
virtual void Paint(nsView* aViewToPaint, const nsRegion& aDirtyRegion,
|
|
uint32_t aFlags) = 0;
|
|
virtual nsresult HandleEvent(nsIFrame* aFrame,
|
|
nsGUIEvent* aEvent,
|
|
bool aDontRetargetEvents,
|
|
nsEventStatus* aEventStatus) = 0;
|
|
virtual bool ShouldIgnoreInvalidation() = 0;
|
|
/**
|
|
* Notify that we're going to call Paint with PAINT_LAYERS
|
|
* on the pres shell for a widget (which might not be this one, since
|
|
* WillPaint is called on all presshells in the same toplevel window as the
|
|
* painted widget). This is issued at a time when it's safe to modify
|
|
* widget geometry.
|
|
*/
|
|
virtual void WillPaint() = 0;
|
|
/**
|
|
* Notify that we're going to call Paint with PAINT_COMPOSITE.
|
|
* Fires on the presshell for the painted widget.
|
|
* This is issued at a time when it's safe to modify widget geometry.
|
|
*/
|
|
virtual void WillPaintWindow() = 0;
|
|
/**
|
|
* Notify that we called Paint with PAINT_COMPOSITE.
|
|
* Fires on the presshell for the painted widget.
|
|
* This is issued at a time when it's safe to modify widget geometry.
|
|
*/
|
|
virtual void DidPaintWindow() = 0;
|
|
|
|
/**
|
|
* Ensures that the refresh driver is running, and schedules a view
|
|
* manager flush on the next tick.
|
|
*/
|
|
virtual void ScheduleViewManagerFlush() = 0;
|
|
virtual void ClearMouseCaptureOnView(nsView* aView) = 0;
|
|
virtual bool IsVisible() = 0;
|
|
virtual void DispatchSynthMouseMove(nsGUIEvent *aEvent, bool aFlushOnHoverChange) = 0;
|
|
|
|
virtual void SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf,
|
|
nsArenaMemoryStats *aArenaObjectsSize,
|
|
size_t *aPresShellSize,
|
|
size_t *aStyleSetsSize,
|
|
size_t *aTextRunsSize,
|
|
size_t *aPresContextSize) = 0;
|
|
|
|
/**
|
|
* Methods that retrieve the cached font inflation preferences.
|
|
*/
|
|
uint32_t FontSizeInflationEmPerLine() const {
|
|
return mFontSizeInflationEmPerLine;
|
|
}
|
|
|
|
uint32_t FontSizeInflationMinTwips() const {
|
|
return mFontSizeInflationMinTwips;
|
|
}
|
|
|
|
uint32_t FontSizeInflationLineThreshold() const {
|
|
return mFontSizeInflationLineThreshold;
|
|
}
|
|
|
|
bool FontSizeInflationForceEnabled() const {
|
|
return mFontSizeInflationForceEnabled;
|
|
}
|
|
|
|
bool FontSizeInflationDisabledInMasterProcess() const {
|
|
return mFontSizeInflationDisabledInMasterProcess;
|
|
}
|
|
|
|
virtual void AddInvalidateHiddenPresShellObserver(nsRefreshDriver *aDriver) = 0;
|
|
|
|
void InvalidatePresShellIfHidden();
|
|
|
|
// Schedule an update of the list of visible images.
|
|
virtual void ScheduleImageVisibilityUpdate() = 0;
|
|
|
|
// Clears the current list of visible images on this presshell and replaces it
|
|
// with images that are in the display list aList.
|
|
virtual void RebuildImageVisibility(const nsDisplayList& aList) = 0;
|
|
|
|
// Ensures the image is in the list of visible images.
|
|
virtual void EnsureImageInVisibleList(nsIImageLoadingContent* aImage) = 0;
|
|
|
|
/**
|
|
* Refresh observer management.
|
|
*/
|
|
protected:
|
|
virtual bool AddRefreshObserverExternal(nsARefreshObserver* aObserver,
|
|
mozFlushType aFlushType);
|
|
bool AddRefreshObserverInternal(nsARefreshObserver* aObserver,
|
|
mozFlushType aFlushType);
|
|
virtual bool RemoveRefreshObserverExternal(nsARefreshObserver* aObserver,
|
|
mozFlushType aFlushType);
|
|
bool RemoveRefreshObserverInternal(nsARefreshObserver* aObserver,
|
|
mozFlushType aFlushType);
|
|
public:
|
|
bool AddRefreshObserver(nsARefreshObserver* aObserver,
|
|
mozFlushType aFlushType) {
|
|
#ifdef _IMPL_NS_LAYOUT
|
|
return AddRefreshObserverInternal(aObserver, aFlushType);
|
|
#else
|
|
return AddRefreshObserverExternal(aObserver, aFlushType);
|
|
#endif
|
|
}
|
|
|
|
bool RemoveRefreshObserver(nsARefreshObserver* aObserver,
|
|
mozFlushType aFlushType) {
|
|
#ifdef _IMPL_NS_LAYOUT
|
|
return RemoveRefreshObserverInternal(aObserver, aFlushType);
|
|
#else
|
|
return RemoveRefreshObserverExternal(aObserver, aFlushType);
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* Initialize and shut down static variables.
|
|
*/
|
|
static void InitializeStatics();
|
|
static void ReleaseStatics();
|
|
|
|
// If a frame in the subtree rooted at aFrame is capturing the mouse then
|
|
// clears that capture.
|
|
static void ClearMouseCapture(nsIFrame* aFrame);
|
|
|
|
void SetScrollPositionClampingScrollPortSize(nscoord aWidth, nscoord aHeight);
|
|
bool IsScrollPositionClampingScrollPortSizeSet() {
|
|
return mScrollPositionClampingScrollPortSizeSet;
|
|
}
|
|
nsSize GetScrollPositionClampingScrollPortSize() {
|
|
NS_ASSERTION(mScrollPositionClampingScrollPortSizeSet, "asking for scroll port when its not set?");
|
|
return mScrollPositionClampingScrollPortSize;
|
|
}
|
|
|
|
void SetContentDocumentFixedPositionMargins(const nsMargin& aMargins);
|
|
const nsMargin& GetContentDocumentFixedPositionMargins() {
|
|
return mContentDocumentFixedPositionMargins;
|
|
}
|
|
|
|
virtual void WindowSizeMoveDone() = 0;
|
|
virtual void SysColorChanged() = 0;
|
|
virtual void ThemeChanged() = 0;
|
|
virtual void BackingScaleFactorChanged() = 0;
|
|
|
|
nscoord MaxLineBoxWidth() {
|
|
return mMaxLineBoxWidth;
|
|
}
|
|
|
|
void SetMaxLineBoxWidth(nscoord aMaxLineBoxWidth);
|
|
|
|
protected:
|
|
friend class nsRefreshDriver;
|
|
|
|
// IMPORTANT: The ownership implicit in the following member variables
|
|
// has been explicitly checked. If you add any members to this class,
|
|
// please make the ownership explicit (pinkerton, scc).
|
|
|
|
// These are the same Document and PresContext owned by the DocViewer.
|
|
// we must share ownership.
|
|
nsIDocument* mDocument; // [STRONG]
|
|
nsPresContext* mPresContext; // [STRONG]
|
|
nsStyleSet* mStyleSet; // [OWNS]
|
|
nsCSSFrameConstructor* mFrameConstructor; // [OWNS]
|
|
nsViewManager* mViewManager; // [WEAK] docViewer owns it so I don't have to
|
|
nsPresArena mFrameArena;
|
|
nsFrameSelection* mSelection;
|
|
// Pointer into mFrameConstructor - this is purely so that FrameManager() and
|
|
// GetRootFrame() can be inlined:
|
|
nsFrameManagerBase* mFrameManager;
|
|
nsWeakPtr mForwardingContainer;
|
|
nsRefreshDriver* mHiddenInvalidationObserverRefreshDriver;
|
|
#ifdef ACCESSIBILITY
|
|
mozilla::a11y::DocAccessible* mDocAccessible;
|
|
#endif
|
|
|
|
#ifdef DEBUG
|
|
nsIFrame* mDrawEventTargetFrame;
|
|
// Ensure that every allocation from the PresArena is eventually freed.
|
|
uint32_t mPresArenaAllocCount;
|
|
#endif
|
|
|
|
// Count of the number of times this presshell has been painted to a window.
|
|
uint64_t mPaintCount;
|
|
|
|
nsSize mScrollPositionClampingScrollPortSize;
|
|
|
|
// This margin is intended to be used when laying out fixed position children
|
|
// on this PresShell's viewport frame. See the documentation of
|
|
// nsIDOMWindowUtils.setContentDocumentFixedPositionMargins for details of
|
|
// their use.
|
|
nsMargin mContentDocumentFixedPositionMargins;
|
|
|
|
// A list of weak frames. This is a pointer to the last item in the list.
|
|
nsWeakFrame* mWeakFrames;
|
|
|
|
// Most recent canvas background color.
|
|
nscolor mCanvasBackgroundColor;
|
|
|
|
// Used to force allocation and rendering of proportionally more or
|
|
// less pixels in the given dimension.
|
|
float mXResolution;
|
|
float mYResolution;
|
|
|
|
int16_t mSelectionFlags;
|
|
|
|
// Flags controlling how our document is rendered. These persist
|
|
// between paints and so are tied with retained layer pixels.
|
|
// PresShell flushes retained layers when the rendering state
|
|
// changes in a way that prevents us from being able to (usefully)
|
|
// re-use old pixels.
|
|
RenderFlags mRenderFlags;
|
|
|
|
// Indicates that the whole document must be restyled. Changes to scoped
|
|
// style sheets are recorded in mChangedScopeStyleRoots rather than here
|
|
// in mStylesHaveChanged.
|
|
bool mStylesHaveChanged : 1;
|
|
bool mDidInitialize : 1;
|
|
bool mIsDestroying : 1;
|
|
bool mIsZombie : 1;
|
|
bool mIsReflowing : 1;
|
|
|
|
// For all documents we initially lock down painting.
|
|
bool mPaintingSuppressed : 1;
|
|
|
|
// Whether or not form controls should use nsITheme in this shell.
|
|
bool mIsThemeSupportDisabled : 1;
|
|
|
|
bool mIsActive : 1;
|
|
bool mFrozen : 1;
|
|
bool mIsFirstPaint : 1;
|
|
bool mObservesMutationsForPrint : 1;
|
|
|
|
// If true, we have a reflow scheduled. Guaranteed to be false if
|
|
// mReflowContinueTimer is non-null.
|
|
bool mReflowScheduled : 1;
|
|
|
|
bool mSuppressInterruptibleReflows : 1;
|
|
bool mScrollPositionClampingScrollPortSizeSet : 1;
|
|
|
|
// List of subtrees rooted at style scope roots that need to be restyled.
|
|
// When a change to a scoped style sheet is made, we add the style scope
|
|
// root to this array rather than setting mStylesHaveChanged = true, since
|
|
// we know we don't need to restyle the whole document. However, if in the
|
|
// same update block we have already had other changes that require
|
|
// the whole document to be restyled (i.e., mStylesHaveChanged is already
|
|
// true), then we don't bother adding the scope root here.
|
|
nsAutoTArray<nsRefPtr<mozilla::dom::Element>,1> mChangedScopeStyleRoots;
|
|
|
|
static nsIContent* gKeyDownTarget;
|
|
|
|
// Cached font inflation values. This is done to prevent changing of font
|
|
// inflation until a page is reloaded.
|
|
uint32_t mFontSizeInflationEmPerLine;
|
|
uint32_t mFontSizeInflationMinTwips;
|
|
uint32_t mFontSizeInflationLineThreshold;
|
|
bool mFontSizeInflationForceEnabled;
|
|
bool mFontSizeInflationDisabledInMasterProcess;
|
|
|
|
// The maximum width of a line box. Text on a single line that exceeds this
|
|
// width will be wrapped. A value of 0 indicates that no limit is enforced.
|
|
nscoord mMaxLineBoxWidth;
|
|
};
|
|
|
|
/**
|
|
* Create a new empty presentation shell. Upon success, call Init
|
|
* before attempting to use the shell.
|
|
*/
|
|
nsresult
|
|
NS_NewPresShell(nsIPresShell** aInstancePtrResult);
|
|
|
|
#endif /* nsIPresShell_h___ */
|