Source/core/paint/DeprecatedPaintLayer.h - Issue 1199673003: Have enclosingPositionedAncestor() detect whether it walked past a certain ancestor.

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Issue 1199673003: Have enclosingPositionedAncestor() detect whether it walked past a certain ancestor. (Closed) Base URL: svn://svn.chromium.org/blink/trunk

Patch Set: code review Created 5 years, 6 months ago

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1 /*	1 /*

2 * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved.	2 * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved.

3 * Copyright (C) 2013 Intel Corporation. All rights reserved.	3 * Copyright (C) 2013 Intel Corporation. All rights reserved.

4 *	4 *

5 * Portions are Copyright (C) 1998 Netscape Communications Corporation.	5 * Portions are Copyright (C) 1998 Netscape Communications Corporation.

6 *	6 *

7 * Other contributors:	7 * Other contributors:

8 * Robert O'Callahan <roc+@cs.cmu.edu>	8 * Robert O'Callahan <roc+@cs.cmu.edu>

9 * David Baron <dbaron@fas.harvard.edu>	9 * David Baron <dbaron@fas.harvard.edu>

10 * Christian Biesinger <cbiesinger@web.de>	10 * Christian Biesinger <cbiesinger@web.de>

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188 bool hasBoxDecorationsOrBackground() const;	188 bool hasBoxDecorationsOrBackground() const;

189 bool hasVisibleBoxDecorations() const;	189 bool hasVisibleBoxDecorations() const;

190 // True if this layer container layoutObjects that paint.	190 // True if this layer container layoutObjects that paint.

191 bool hasNonEmptyChildLayoutObjects() const;	191 bool hasNonEmptyChildLayoutObjects() const;

192	192

193 // Will ensure that hasNonCompositiedChild are up to date.	193 // Will ensure that hasNonCompositiedChild are up to date.

194 void updateScrollingStateAfterCompositingChange();	194 void updateScrollingStateAfterCompositingChange();

195 bool hasVisibleNonLayerContent() const { return m_hasVisibleNonLayerContent; }	195 bool hasVisibleNonLayerContent() const { return m_hasVisibleNonLayerContent; }

196 bool hasNonCompositedChild() const { ASSERT(isAllowedToQueryCompositingState ()); return m_hasNonCompositedChild; }	196 bool hasNonCompositedChild() const { ASSERT(isAllowedToQueryCompositingState ()); return m_hasNonCompositedChild; }

197	197

198 // Gets the nearest enclosing positioned ancestor layer (also includes	198 // Gets the ancestor layer that serves as the containing block of this layer . It is assumed

199 // the <html> layer and the root layer).	199 // that this layer is established by an out-of-flow positioned layout object (i.e. either

200 DeprecatedPaintLayer* enclosingPositionedAncestor() const;	200 // absolutely or fixed positioned).

	201 // If \|ancestor\| is specified, \|*skippedAncestor\| will be set to true if \|an cestor\| is found in

	202 // the ancestry chain between this layer and the containing block layer; if not found, it will

	203 // be set to false. Either both \|ancestor\| and \|skippedAncestor\| should be n ullptr, or none of

	204 // them should.

	205 DeprecatedPaintLayer* enclosingPositionedAncestor(const DeprecatedPaintLayer * ancestor = nullptr, bool* skippedAncestor = nullptr) const;

201	206

202 bool isPaintInvalidationContainer() const;	207 bool isPaintInvalidationContainer() const;

203	208

204 // Do not call this method unless you know what you are dooing. You probab ly want to call enclosingCompositingLayerForPaintInvalidation() instead.	209 // Do not call this method unless you know what you are dooing. You probab ly want to call enclosingCompositingLayerForPaintInvalidation() instead.

205 // If includeSelf is true, may return this.	210 // If includeSelf is true, may return this.

206 DeprecatedPaintLayer* enclosingLayerWithCompositedDeprecatedPaintLayerMappin g(IncludeSelfOrNot) const;	211 DeprecatedPaintLayer* enclosingLayerWithCompositedDeprecatedPaintLayerMappin g(IncludeSelfOrNot) const;

207	212

208 // Returns the enclosing layer root into which this layer paints, inclusive of this one. Note that the enclosing layer may or may not have its own	213 // Returns the enclosing layer root into which this layer paints, inclusive of this one. Note that the enclosing layer may or may not have its own

209 // GraphicsLayer backing, but is nevertheless the root for a call to the Lay er::paint*() methods.	214 // GraphicsLayer backing, but is nevertheless the root for a call to the Lay er::paint*() methods.

210 DeprecatedPaintLayer* enclosingLayerForPaintInvalidation() const;	215 DeprecatedPaintLayer* enclosingLayerForPaintInvalidation() const;

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710	715

711 } // namespace blink	716 } // namespace blink

712	717

713 #ifndef NDEBUG	718 #ifndef NDEBUG

714 // Outside the WebCore namespace for ease of invocation from gdb.	719 // Outside the WebCore namespace for ease of invocation from gdb.

715 void showLayerTree(const blink::DeprecatedPaintLayer*);	720 void showLayerTree(const blink::DeprecatedPaintLayer*);

716 void showLayerTree(const blink::LayoutObject*);	721 void showLayerTree(const blink::LayoutObject*);

717 #endif	722 #endif

718	723

719 #endif // Layer_h	724 #endif // Layer_h

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