312 lines
10 KiB
C++
312 lines
10 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
|
*
|
|
* The contents of this file are subject to the Netscape 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/NPL/
|
|
*
|
|
* 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 Netscape are
|
|
* Copyright (C) 1998 Netscape Communications Corporation. All
|
|
* Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*/
|
|
#include "nsCOMPtr.h"
|
|
#include "nsHTMLParts.h"
|
|
#include "nsIHTMLContent.h"
|
|
#include "nsLeafFrame.h"
|
|
#include "nsIRenderingContext.h"
|
|
#include "nsIStyleContext.h"
|
|
#include "nsColor.h"
|
|
#include "nsIPresContext.h"
|
|
#include "nsIStyleContext.h"
|
|
#include "nsHTMLIIDs.h"
|
|
#include "nsHTMLAtoms.h"
|
|
#include "nsIFontMetrics.h"
|
|
#include "nsStyleConsts.h"
|
|
#include "nsCSSRendering.h"
|
|
#include "nsIDOMHTMLHRElement.h"
|
|
#include "nsIDeviceContext.h"
|
|
#include "nsStyleUtil.h"
|
|
#include "nsLayoutAtoms.h"
|
|
|
|
|
|
// default hr thickness in pixels
|
|
#define DEFAULT_THICKNESS 3
|
|
|
|
class HRuleFrame : public nsFrame {
|
|
public:
|
|
HRuleFrame();
|
|
|
|
NS_IMETHOD Reflow(nsIPresContext* aPresContext,
|
|
nsHTMLReflowMetrics& aDesiredSize,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsReflowStatus& aStatus);
|
|
NS_IMETHOD Paint(nsIPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
const nsRect& aDirtyRect,
|
|
nsFramePaintLayer aWhichLayer);
|
|
NS_IMETHOD GetFrameType(nsIAtom** aType) const;
|
|
#ifdef DEBUG
|
|
NS_IMETHOD SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const;
|
|
#endif
|
|
|
|
protected:
|
|
PRBool GetNoShade();
|
|
|
|
nsMargin mBorderPadding;
|
|
nscoord mThickness;
|
|
};
|
|
|
|
nsresult
|
|
NS_NewHRFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame)
|
|
{
|
|
NS_PRECONDITION(aNewFrame, "null OUT ptr");
|
|
if (nsnull == aNewFrame) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
HRuleFrame* it = new (aPresShell) HRuleFrame;
|
|
if (nsnull == it) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
*aNewFrame = it;
|
|
return NS_OK;
|
|
}
|
|
|
|
HRuleFrame::HRuleFrame()
|
|
{
|
|
}
|
|
|
|
NS_METHOD
|
|
HRuleFrame::Paint(nsIPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
const nsRect& aDirtyRect,
|
|
nsFramePaintLayer aWhichLayer)
|
|
{
|
|
if (NS_FRAME_PAINT_LAYER_FOREGROUND != aWhichLayer) {
|
|
return NS_OK;
|
|
}
|
|
|
|
const nsStyleDisplay* disp =
|
|
(const nsStyleDisplay*)mStyleContext->GetStyleData(eStyleStruct_Display);
|
|
if (!disp->IsVisible()) {
|
|
return NS_OK;
|
|
}
|
|
|
|
float p2t;
|
|
aPresContext->GetScaledPixelsToTwips(&p2t);
|
|
nscoord thickness = mThickness;
|
|
|
|
// Get style data
|
|
nscoord x0 = mBorderPadding.left;
|
|
nscoord y0 = mBorderPadding.top;
|
|
nscoord width = mRect.width -
|
|
(mBorderPadding.left + mBorderPadding.right);
|
|
nscoord height = mRect.height -
|
|
(mBorderPadding.top + mBorderPadding.bottom);
|
|
|
|
// Center hrule vertically within the available space
|
|
y0 += (height - thickness) / 2;
|
|
height = thickness;
|
|
|
|
// To shade or not to shade, that is the question. Begin by collecting the
|
|
// three decision criteria: rendering to the printer or the display, is the
|
|
// "Beveled Lines" checkbox set in the page setup dialog, and does the tag
|
|
// have the NOSHADE attribute set.
|
|
PRBool noShadeAttribute = GetNoShade();
|
|
|
|
// Now that we have the data to make the shading criteria, we next
|
|
// collect the decision criteria for rending in solid black:
|
|
// printing (which we already have) and the "Black Lines" setting in
|
|
// the page setup dialog
|
|
|
|
const nsStyleColor* color;
|
|
// Draw a "shadowed" box around the rule area
|
|
if (!noShadeAttribute) {
|
|
nsRect rect(x0, y0, width, height);
|
|
|
|
const nsStyleSpacing* spacing =
|
|
(nsStyleSpacing*)mStyleContext->GetStyleData(eStyleStruct_Spacing);
|
|
color = (nsStyleColor*)mStyleContext->GetStyleData(eStyleStruct_Color);
|
|
|
|
nsCSSRendering::PaintBackground(aPresContext, aRenderingContext,
|
|
this,aDirtyRect, rect, *color,
|
|
*spacing, 0, 0);
|
|
nsCSSRendering::PaintBorder(aPresContext, aRenderingContext,
|
|
this,aDirtyRect, rect, *spacing,
|
|
mStyleContext, 0);
|
|
} else {
|
|
nscolor colors[2];
|
|
// Get the background color that applies to this HR
|
|
color = nsStyleUtil::FindNonTransparentBackground(mStyleContext);
|
|
NS_Get3DColors(colors, color->mBackgroundColor);
|
|
|
|
// When a rule is not shaded, then we use a uniform color and
|
|
// draw half-circles on the end points.
|
|
aRenderingContext.SetColor (colors[0]);
|
|
nscoord diameter = height;
|
|
if ((diameter > width) || (diameter < NSIntPixelsToTwips(3, p2t))) {
|
|
// The half-circles on the ends of the rule aren't going to
|
|
// look right so don't bother drawing them.
|
|
aRenderingContext.FillRect(x0, y0, width, height);
|
|
} else {
|
|
aRenderingContext.FillArc(x0, y0, diameter, diameter, 90.0f, 270.0f);
|
|
aRenderingContext.FillArc(x0 + width - diameter, y0,
|
|
diameter, diameter, 270.0f, 180.0f);
|
|
aRenderingContext.FillRect(x0 + diameter/2, y0,
|
|
width - diameter, height);
|
|
}
|
|
}
|
|
return nsFrame::Paint(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
HRuleFrame::Reflow(nsIPresContext* aPresContext,
|
|
nsHTMLReflowMetrics& aDesiredSize,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsReflowStatus& aStatus)
|
|
{
|
|
DO_GLOBAL_REFLOW_COUNT("HRuleFrame", aReflowState.reason);
|
|
NS_PRECONDITION(mState & NS_FRAME_IN_REFLOW, "frame is not in reflow");
|
|
|
|
// bug 18754: In compat mode, we treat HR's as inline elements
|
|
// with break-before and break-after semantics
|
|
// achieved in quirks.css using :before and :after
|
|
// In standard mode, HR is still just a block, no special handling
|
|
nsCompatibility mode;
|
|
aPresContext->GetCompatibilityMode(&mode);
|
|
|
|
// Compute the width
|
|
float p2t;
|
|
aPresContext->GetScaledPixelsToTwips(&p2t);
|
|
nscoord onePixel = NSIntPixelsToTwips(1, p2t); // get the rounding right
|
|
nscoord twoPixels= NSIntPixelsToTwips(2, p2t); // get the rounding right
|
|
if (NS_UNCONSTRAINEDSIZE != aReflowState.mComputedWidth) {
|
|
aDesiredSize.width = aReflowState.mComputedWidth;
|
|
}
|
|
else {
|
|
if (NS_UNCONSTRAINEDSIZE == aReflowState.availableWidth) {
|
|
aDesiredSize.width = onePixel;
|
|
}
|
|
else {
|
|
aDesiredSize.width = aReflowState.availableWidth;
|
|
}
|
|
}
|
|
|
|
|
|
// Get the thickness of the rule. Note that this specifies the
|
|
// height of the rule, not the height of the frame.
|
|
nscoord thickness;
|
|
if (NS_UNCONSTRAINEDSIZE != aReflowState.mComputedHeight)
|
|
{
|
|
thickness = aReflowState.mComputedHeight;
|
|
// fix up thickness based on noshade and mode. see bug 53568 and 54980
|
|
if (eCompatibility_NavQuirks == mode)
|
|
{
|
|
nscoord adjustment = aReflowState.mComputedBorderPadding.top +
|
|
aReflowState.mComputedBorderPadding.bottom;
|
|
thickness += adjustment; // adjust for -moz-bg-inset
|
|
PRBool noShadeAttribute = GetNoShade();
|
|
if (thickness != onePixel)
|
|
{
|
|
if (!noShadeAttribute) { // this makes us compatible with Nav4, and one pixel taller than IE5
|
|
thickness += onePixel;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
thickness = NSIntPixelsToTwips(DEFAULT_THICKNESS, p2t);
|
|
}
|
|
|
|
// remember the computed thickness
|
|
mThickness = thickness;
|
|
NS_ASSERTION(mThickness>=0, "negative height calculated for HR");
|
|
|
|
// Compute height of "line" that hrule will layout within. Use the
|
|
// font-size to do this.
|
|
nscoord minLineHeight = thickness + twoPixels;
|
|
const nsStyleFont* font;
|
|
GetStyleData(eStyleStruct_Font, (const nsStyleStruct*&) font);
|
|
const nsFont& f = font->mFont;
|
|
nsCOMPtr<nsIFontMetrics> fm;
|
|
aPresContext->GetMetricsFor(f, getter_AddRefs(fm));
|
|
nscoord fontHeight;
|
|
fm->GetHeight(fontHeight);
|
|
|
|
aDesiredSize.height =
|
|
(minLineHeight < fontHeight ? fontHeight : minLineHeight) +
|
|
aReflowState.mComputedBorderPadding.top +
|
|
aReflowState.mComputedBorderPadding.bottom;
|
|
aDesiredSize.ascent = aDesiredSize.height;
|
|
aDesiredSize.descent = 0;
|
|
|
|
// HR's do not impact the max-element-size, unless a width is
|
|
// specified otherwise tables behave badly. This makes sense -- they
|
|
// are springy.
|
|
if (nsnull != aDesiredSize.maxElementSize) {
|
|
if (NS_UNCONSTRAINEDSIZE != aReflowState.mComputedWidth) {
|
|
nsStyleUnit widthUnit = aReflowState.mStylePosition->mWidth.GetUnit();
|
|
if ((eStyleUnit_Percent == widthUnit) ||
|
|
(eStyleUnit_Auto == widthUnit)) {
|
|
// When the HR is using an 'auto' or percentage width, make sure it
|
|
// remains springy.
|
|
aDesiredSize.maxElementSize->width = onePixel;
|
|
}
|
|
else {
|
|
aDesiredSize.maxElementSize->width = aReflowState.mComputedWidth;
|
|
}
|
|
}
|
|
else {
|
|
aDesiredSize.maxElementSize->width = onePixel;
|
|
}
|
|
NS_ASSERTION(aDesiredSize.maxElementSize->width <= aDesiredSize.width, "bad max-element-size width");
|
|
aDesiredSize.maxElementSize->height = aDesiredSize.height;
|
|
}
|
|
|
|
aStatus = NS_FRAME_COMPLETE;
|
|
return NS_OK;
|
|
}
|
|
|
|
PRBool
|
|
HRuleFrame::GetNoShade()
|
|
{
|
|
PRBool result = PR_FALSE;
|
|
nsIDOMHTMLHRElement* hr = nsnull;
|
|
mContent->QueryInterface(NS_GET_IID(nsIDOMHTMLHRElement), (void**) &hr);
|
|
if (nsnull != hr) {
|
|
hr->GetNoShade(&result);
|
|
NS_RELEASE(hr);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
HRuleFrame::GetFrameType(nsIAtom** aType) const
|
|
{
|
|
NS_PRECONDITION(nsnull != aType, "null OUT parameter pointer");
|
|
*aType = nsLayoutAtoms::hrFrame;
|
|
NS_ADDREF(*aType);
|
|
return NS_OK;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
NS_IMETHODIMP
|
|
HRuleFrame::SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const
|
|
{
|
|
if (!aResult) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
*aResult = sizeof(*this);
|
|
return NS_OK;
|
|
}
|
|
#endif
|