layout/generic/nsLeafFrame.h@6474c204b198 (annotated)
layout/generic/nsLeafFrame.h
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | /* base class for rendering objects that do not have child lists */ |
| michael@0 | 7 | |
| michael@0 | 8 | #ifndef nsLeafFrame_h___ |
| michael@0 | 9 | #define nsLeafFrame_h___ |
| michael@0 | 10 | |
| michael@0 | 11 | #include "mozilla/Attributes.h" |
| michael@0 | 12 | #include "nsFrame.h" |
| michael@0 | 13 | #include "nsDisplayList.h" |
| michael@0 | 14 | |
| michael@0 | 15 | /** |
| michael@0 | 16 | * Abstract class that provides simple fixed-size layout for leaf objects |
| michael@0 | 17 | * (e.g. images, form elements, etc.). Deriviations provide the implementation |
| michael@0 | 18 | * of the GetDesiredSize method. The rendering method knows how to render |
| michael@0 | 19 | * borders and backgrounds. |
| michael@0 | 20 | */ |
| michael@0 | 21 | class nsLeafFrame : public nsFrame { |
| michael@0 | 22 | public: |
| michael@0 | 23 | NS_DECL_FRAMEARENA_HELPERS |
| michael@0 | 24 | |
| michael@0 | 25 | // nsIFrame replacements |
| michael@0 | 26 | virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder, |
| michael@0 | 27 | const nsRect& aDirtyRect, |
| michael@0 | 28 | const nsDisplayListSet& aLists) MOZ_OVERRIDE { |
| michael@0 | 29 | DO_GLOBAL_REFLOW_COUNT_DSP("nsLeafFrame"); |
| michael@0 | 30 | DisplayBorderBackgroundOutline(aBuilder, aLists); |
| michael@0 | 31 | } |
| michael@0 | 32 | |
| michael@0 | 33 | /** |
| michael@0 | 34 | * Both GetMinWidth and GetPrefWidth will return whatever GetIntrinsicWidth |
| michael@0 | 35 | * returns. |
| michael@0 | 36 | */ |
| michael@0 | 37 | virtual nscoord GetMinWidth(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE; |
| michael@0 | 38 | virtual nscoord GetPrefWidth(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE; |
| michael@0 | 39 | |
| michael@0 | 40 | /** |
| michael@0 | 41 | * Our auto size is just intrinsic width and intrinsic height. |
| michael@0 | 42 | */ |
| michael@0 | 43 | virtual nsSize ComputeAutoSize(nsRenderingContext *aRenderingContext, |
| michael@0 | 44 | nsSize aCBSize, nscoord aAvailableWidth, |
| michael@0 | 45 | nsSize aMargin, nsSize aBorder, |
| michael@0 | 46 | nsSize aPadding, bool aShrinkWrap) MOZ_OVERRIDE; |
| michael@0 | 47 | |
| michael@0 | 48 | /** |
| michael@0 | 49 | * Reflow our frame. This will use the computed width plus borderpadding for |
| michael@0 | 50 | * the desired width, and use the return value of GetIntrinsicHeight plus |
| michael@0 | 51 | * borderpadding for the desired height. Ascent will be set to the height, |
| michael@0 | 52 | * and descent will be set to 0. |
| michael@0 | 53 | */ |
| michael@0 | 54 | virtual nsresult Reflow(nsPresContext* aPresContext, |
| michael@0 | 55 | nsHTMLReflowMetrics& aDesiredSize, |
| michael@0 | 56 | const nsHTMLReflowState& aReflowState, |
| michael@0 | 57 | nsReflowStatus& aStatus) MOZ_OVERRIDE; |
| michael@0 | 58 | |
| michael@0 | 59 | /** |
| michael@0 | 60 | * This method does most of the work that Reflow() above need done. |
| michael@0 | 61 | */ |
| michael@0 | 62 | virtual nsresult DoReflow(nsPresContext* aPresContext, |
| michael@0 | 63 | nsHTMLReflowMetrics& aDesiredSize, |
| michael@0 | 64 | const nsHTMLReflowState& aReflowState, |
| michael@0 | 65 | nsReflowStatus& aStatus); |
| michael@0 | 66 | |
| michael@0 | 67 | virtual bool IsFrameOfType(uint32_t aFlags) const MOZ_OVERRIDE |
| michael@0 | 68 | { |
| michael@0 | 69 | // We don't actually contain a block, but we do always want a |
| michael@0 | 70 | // computed width, so tell a little white lie here. |
| michael@0 | 71 | return nsFrame::IsFrameOfType(aFlags & ~(nsIFrame::eReplacedContainsBlock)); |
| michael@0 | 72 | } |
| michael@0 | 73 | |
| michael@0 | 74 | protected: |
| michael@0 | 75 | nsLeafFrame(nsStyleContext* aContext) : nsFrame(aContext) {} |
| michael@0 | 76 | virtual ~nsLeafFrame(); |
| michael@0 | 77 | |
| michael@0 | 78 | /** |
| michael@0 | 79 | * Return the intrinsic width of the frame's content area. Note that this |
| michael@0 | 80 | * should not include borders or padding and should not depend on the applied |
| michael@0 | 81 | * styles. |
| michael@0 | 82 | */ |
| michael@0 | 83 | virtual nscoord GetIntrinsicWidth() = 0; |
| michael@0 | 84 | |
| michael@0 | 85 | /** |
| michael@0 | 86 | * Return the intrinsic height of the frame's content area. This should not |
| michael@0 | 87 | * include border or padding. This will only matter if the specified height |
| michael@0 | 88 | * is auto. Note that subclasses must either implement this or override |
| michael@0 | 89 | * Reflow and ComputeAutoSize; the default Reflow and ComputeAutoSize impls |
| michael@0 | 90 | * call this method. |
| michael@0 | 91 | */ |
| michael@0 | 92 | virtual nscoord GetIntrinsicHeight(); |
| michael@0 | 93 | |
| michael@0 | 94 | /** |
| michael@0 | 95 | * Subroutine to add in borders and padding |
| michael@0 | 96 | */ |
| michael@0 | 97 | void AddBordersAndPadding(const nsHTMLReflowState& aReflowState, |
| michael@0 | 98 | nsHTMLReflowMetrics& aDesiredSize); |
| michael@0 | 99 | |
| michael@0 | 100 | /** |
| michael@0 | 101 | * Set aDesiredSize to be the available size |
| michael@0 | 102 | */ |
| michael@0 | 103 | void SizeToAvailSize(const nsHTMLReflowState& aReflowState, |
| michael@0 | 104 | nsHTMLReflowMetrics& aDesiredSize); |
| michael@0 | 105 | }; |
| michael@0 | 106 | |
| michael@0 | 107 | #endif /* nsLeafFrame_h___ */ |
