The Tor Browser / file comparison
comparison: layout/generic/nsViewportFrame.h
layout/generic/nsViewportFrame.h
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:49072d15139e |
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| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 /* | |
| 7 * rendering object that is the root of the frame tree, which contains | |
| 8 * the document's scrollbars and contains fixed-positioned elements | |
| 9 */ | |
| 10 | |
| 11 #ifndef nsViewportFrame_h___ | |
| 12 #define nsViewportFrame_h___ | |
| 13 | |
| 14 #include "mozilla/Attributes.h" | |
| 15 #include "nsContainerFrame.h" | |
| 16 | |
| 17 class nsPresContext; | |
| 18 | |
| 19 /** | |
| 20 * ViewportFrame is the parent of a single child - the doc root frame or a scroll frame | |
| 21 * containing the doc root frame. ViewportFrame stores this child in its primary child | |
| 22 * list. | |
| 23 */ | |
| 24 class ViewportFrame : public nsContainerFrame { | |
| 25 public: | |
| 26 NS_DECL_QUERYFRAME_TARGET(ViewportFrame) | |
| 27 NS_DECL_QUERYFRAME | |
| 28 NS_DECL_FRAMEARENA_HELPERS | |
| 29 | |
| 30 typedef nsContainerFrame Super; | |
| 31 | |
| 32 ViewportFrame(nsStyleContext* aContext) | |
| 33 : nsContainerFrame(aContext) | |
| 34 {} | |
| 35 virtual ~ViewportFrame() { } // useful for debugging | |
| 36 | |
| 37 virtual void Init(nsIContent* aContent, | |
| 38 nsIFrame* aParent, | |
| 39 nsIFrame* asPrevInFlow) MOZ_OVERRIDE; | |
| 40 | |
| 41 virtual nsresult SetInitialChildList(ChildListID aListID, | |
| 42 nsFrameList& aChildList) MOZ_OVERRIDE; | |
| 43 | |
| 44 virtual nsresult AppendFrames(ChildListID aListID, | |
| 45 nsFrameList& aFrameList) MOZ_OVERRIDE; | |
| 46 | |
| 47 virtual nsresult InsertFrames(ChildListID aListID, | |
| 48 nsIFrame* aPrevFrame, | |
| 49 nsFrameList& aFrameList) MOZ_OVERRIDE; | |
| 50 | |
| 51 virtual nsresult RemoveFrame(ChildListID aListID, | |
| 52 nsIFrame* aOldFrame) MOZ_OVERRIDE; | |
| 53 | |
| 54 virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder, | |
| 55 const nsRect& aDirtyRect, | |
| 56 const nsDisplayListSet& aLists) MOZ_OVERRIDE; | |
| 57 | |
| 58 virtual nscoord GetMinWidth(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE; | |
| 59 virtual nscoord GetPrefWidth(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE; | |
| 60 virtual nsresult Reflow(nsPresContext* aPresContext, | |
| 61 nsHTMLReflowMetrics& aDesiredSize, | |
| 62 const nsHTMLReflowState& aReflowState, | |
| 63 nsReflowStatus& aStatus) MOZ_OVERRIDE; | |
| 64 | |
| 65 /** | |
| 66 * Get the "type" of the frame | |
| 67 * | |
| 68 * @see nsGkAtoms::viewportFrame | |
| 69 */ | |
| 70 virtual nsIAtom* GetType() const MOZ_OVERRIDE; | |
| 71 | |
| 72 /** | |
| 73 * Adjust aReflowState to account for scrollbars and pres shell | |
| 74 * GetScrollPositionClampingScrollPortSizeSet and | |
| 75 * GetContentDocumentFixedPositionMargins adjustments. | |
| 76 * @return the rect to use as containing block rect | |
| 77 */ | |
| 78 nsRect AdjustReflowStateAsContainingBlock(nsHTMLReflowState* aReflowState) const; | |
| 79 | |
| 80 #ifdef DEBUG_FRAME_DUMP | |
| 81 virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE; | |
| 82 #endif | |
| 83 | |
| 84 private: | |
| 85 virtual mozilla::layout::FrameChildListID GetAbsoluteListID() const MOZ_OVERRIDE { return kFixedList; } | |
| 86 | |
| 87 protected: | |
| 88 /** | |
| 89 * Calculate how much room is available for fixed frames. That means | |
| 90 * determining if the viewport is scrollable and whether the vertical and/or | |
| 91 * horizontal scrollbars are visible. Adjust the computed width/height and | |
| 92 * available width for aReflowState accordingly. | |
| 93 * @return the current scroll position, or 0,0 if not scrollable | |
| 94 */ | |
| 95 nsPoint AdjustReflowStateForScrollbars(nsHTMLReflowState* aReflowState) const; | |
| 96 }; | |
| 97 | |
| 98 | |
| 99 #endif // nsViewportFrame_h___ |
