зеркало из https://github.com/mozilla/gecko-dev.git
139 строки
5.3 KiB
C++
139 строки
5.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is mozilla.org code.
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Netscape Communications Corporation.
|
|
* Portions created by the Initial Developer are Copyright (C) 1998
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either of the GNU General Public License Version 2 or later (the "GPL"),
|
|
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
/* base class for rendering objects that do not have child lists */
|
|
|
|
#ifndef nsLeafFrame_h___
|
|
#define nsLeafFrame_h___
|
|
|
|
#include "nsFrame.h"
|
|
#include "nsDisplayList.h"
|
|
|
|
/**
|
|
* Abstract class that provides simple fixed-size layout for leaf objects
|
|
* (e.g. images, form elements, etc.). Deriviations provide the implementation
|
|
* of the GetDesiredSize method. The rendering method knows how to render
|
|
* borders and backgrounds.
|
|
*/
|
|
class nsLeafFrame : public nsFrame {
|
|
public:
|
|
NS_DECL_FRAMEARENA_HELPERS
|
|
|
|
// nsIFrame replacements
|
|
NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
|
|
const nsRect& aDirtyRect,
|
|
const nsDisplayListSet& aLists) {
|
|
DO_GLOBAL_REFLOW_COUNT_DSP("nsLeafFrame");
|
|
return DisplayBorderBackgroundOutline(aBuilder, aLists);
|
|
}
|
|
|
|
/**
|
|
* Both GetMinWidth and GetPrefWidth will return whatever GetIntrinsicWidth
|
|
* returns.
|
|
*/
|
|
virtual nscoord GetMinWidth(nsRenderingContext *aRenderingContext);
|
|
virtual nscoord GetPrefWidth(nsRenderingContext *aRenderingContext);
|
|
|
|
/**
|
|
* Our auto size is just intrinsic width and intrinsic height.
|
|
*/
|
|
virtual nsSize ComputeAutoSize(nsRenderingContext *aRenderingContext,
|
|
nsSize aCBSize, nscoord aAvailableWidth,
|
|
nsSize aMargin, nsSize aBorder,
|
|
nsSize aPadding, PRBool aShrinkWrap);
|
|
|
|
/**
|
|
* Reflow our frame. This will use the computed width plus borderpadding for
|
|
* the desired width, and use the return value of GetIntrinsicHeight plus
|
|
* borderpadding for the desired height. Ascent will be set to the height,
|
|
* and descent will be set to 0.
|
|
*/
|
|
NS_IMETHOD Reflow(nsPresContext* aPresContext,
|
|
nsHTMLReflowMetrics& aDesiredSize,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsReflowStatus& aStatus);
|
|
|
|
/**
|
|
* This method does most of the work that Reflow() above need done.
|
|
*/
|
|
NS_IMETHOD DoReflow(nsPresContext* aPresContext,
|
|
nsHTMLReflowMetrics& aDesiredSize,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsReflowStatus& aStatus);
|
|
|
|
virtual PRBool IsFrameOfType(PRUint32 aFlags) const
|
|
{
|
|
// We don't actually contain a block, but we do always want a
|
|
// computed width, so tell a little white lie here.
|
|
return nsFrame::IsFrameOfType(aFlags & ~(nsIFrame::eReplacedContainsBlock));
|
|
}
|
|
|
|
protected:
|
|
nsLeafFrame(nsStyleContext* aContext) : nsFrame(aContext) {}
|
|
virtual ~nsLeafFrame();
|
|
|
|
/**
|
|
* Return the intrinsic width of the frame's content area. Note that this
|
|
* should not include borders or padding and should not depend on the applied
|
|
* styles.
|
|
*/
|
|
virtual nscoord GetIntrinsicWidth() = 0;
|
|
|
|
/**
|
|
* Return the intrinsic height of the frame's content area. This should not
|
|
* include border or padding. This will only matter if the specified height
|
|
* is auto. Note that subclasses must either implement this or override
|
|
* Reflow and ComputeAutoSize; the default Reflow and ComputeAutoSize impls
|
|
* call this method.
|
|
*/
|
|
virtual nscoord GetIntrinsicHeight();
|
|
|
|
/**
|
|
* Subroutine to add in borders and padding
|
|
*/
|
|
void AddBordersAndPadding(const nsHTMLReflowState& aReflowState,
|
|
nsHTMLReflowMetrics& aDesiredSize);
|
|
|
|
/**
|
|
* Set aDesiredSize to be the available size
|
|
*/
|
|
void SizeToAvailSize(const nsHTMLReflowState& aReflowState,
|
|
nsHTMLReflowMetrics& aDesiredSize);
|
|
};
|
|
|
|
#endif /* nsLeafFrame_h___ */
|