зеркало из https://github.com/mozilla/pjs.git
451 строка
13 KiB
C++
451 строка
13 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS"
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* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
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* the License for the specific language governing rights and limitations
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* under the License.
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*
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* The Original Code is Mozilla Communicator client code.
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*
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* The Initial Developer of the Original Code is Netscape Communications
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* Corporation. Portions created by Netscape are Copyright (C) 1998
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* Netscape Communications Corporation. All Rights Reserved.
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*/
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#include "nsBulletFrame.h"
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#include "nsHTMLAtoms.h"
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#include "nsHTMLIIDs.h"
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#include "nsHTMLParts.h"
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#include "nsHTMLValue.h"
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#include "nsHTMLContainerFrame.h"
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#include "nsIFontMetrics.h"
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#include "nsIHTMLContent.h"
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#include "nsIPresContext.h"
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#include "nsIPresShell.h"
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#include "nsIDocument.h"
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#include "nsIReflowCommand.h"
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#include "nsIRenderingContext.h"
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#include "nsIURL.h"
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#include "prprf.h"
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nsBulletFrame::nsBulletFrame()
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{
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}
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nsBulletFrame::~nsBulletFrame()
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{
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}
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NS_IMETHODIMP
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nsBulletFrame::DeleteFrame(nsIPresContext& aPresContext)
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{
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// Release image loader first so that its refcnt can go to zero
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mImageLoader.DestroyLoader();
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return nsFrame::DeleteFrame(aPresContext);
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}
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NS_IMETHODIMP
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nsBulletFrame::GetFrameName(nsString& aResult) const
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{
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return MakeFrameName("Bullet", aResult);
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}
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NS_IMETHODIMP
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nsBulletFrame::List(FILE* out, PRInt32 aIndent) const
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{
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PRInt32 i;
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for (i = aIndent; --i >= 0; ) fputs(" ", out);
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fprintf(out, "Bullet(%d)@%p ", ContentIndexInContainer(this), this);
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nsIView* view;
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GetView(&view);
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if (nsnull != view) {
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fprintf(out, " [view=%p]", view);
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}
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out << mRect;
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if (0 != mState) {
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fprintf(out, " [state=%08x]", mState);
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}
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fputs("<>\n", out);
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return NS_OK;
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}
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NS_METHOD
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nsBulletFrame::Paint(nsIPresContext& aCX,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsFramePaintLayer aWhichLayer)
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{
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if (eFramePaintLayer_Content != aWhichLayer) {
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return NS_OK;
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}
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const nsStyleDisplay* disp =
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(const nsStyleDisplay*)mStyleContext->GetStyleData(eStyleStruct_Display);
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if (disp->mVisible) {
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const nsStyleList* myList =
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(const nsStyleList*)mStyleContext->GetStyleData(eStyleStruct_List);
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if (myList->mListStyleImage.Length() > 0) {
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nsIImage* image = mImageLoader.GetImage();
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if (nsnull == image) {
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if (!mImageLoader.GetLoadImageFailed()) {
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// No image yet
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return NS_OK;
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}
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}
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else {
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nsRect innerArea(mPadding.left, mPadding.top,
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mRect.width - (mPadding.left + mPadding.right),
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mRect.height - (mPadding.top + mPadding.bottom));
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aRenderingContext.DrawImage(image, innerArea);
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return NS_OK;
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}
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}
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const nsStyleFont* myFont =
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(const nsStyleFont*)mStyleContext->GetStyleData(eStyleStruct_Font);
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const nsStyleColor* myColor =
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(const nsStyleColor*)mStyleContext->GetStyleData(eStyleStruct_Color);
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nsIFontMetrics* fm;
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aRenderingContext.SetColor(myColor->mColor);
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nsAutoString text;
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switch (myList->mListStyleType) {
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case NS_STYLE_LIST_STYLE_NONE:
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break;
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default:
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case NS_STYLE_LIST_STYLE_BASIC:
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case NS_STYLE_LIST_STYLE_DISC:
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aRenderingContext.FillEllipse(mPadding.left, mPadding.top,
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mRect.width - (mPadding.left + mPadding.right),
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mRect.height - (mPadding.top + mPadding.bottom));
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break;
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case NS_STYLE_LIST_STYLE_CIRCLE:
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aRenderingContext.DrawEllipse(mPadding.left, mPadding.top,
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mRect.width - (mPadding.left + mPadding.right),
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mRect.height - (mPadding.top + mPadding.bottom));
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break;
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case NS_STYLE_LIST_STYLE_SQUARE:
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aRenderingContext.FillRect(mPadding.left, mPadding.top,
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mRect.width - (mPadding.left + mPadding.right),
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mRect.height - (mPadding.top + mPadding.bottom));
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break;
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case NS_STYLE_LIST_STYLE_DECIMAL:
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case NS_STYLE_LIST_STYLE_LOWER_ROMAN:
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case NS_STYLE_LIST_STYLE_UPPER_ROMAN:
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case NS_STYLE_LIST_STYLE_LOWER_ALPHA:
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case NS_STYLE_LIST_STYLE_UPPER_ALPHA:
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fm = aCX.GetMetricsFor(myFont->mFont);
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GetListItemText(aCX, *myList, text);
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aRenderingContext.SetFont(fm);
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aRenderingContext.DrawString(text, mPadding.left, mPadding.top);
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NS_RELEASE(fm);
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break;
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}
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}
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return NS_OK;
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}
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PRInt32
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nsBulletFrame::SetListItemOrdinal(PRInt32 aNextOrdinal)
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{
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// Assume that the ordinal comes from the block reflow state
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mOrdinal = aNextOrdinal;
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// Try to get value directly from the list-item, if it specifies a
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// value attribute. Note: we do this with our parent's content
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// because our parent is the list-item.
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nsHTMLValue value;
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nsIContent* parentContent;
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mParent->GetContent(&parentContent);
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nsIHTMLContent* hc;
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if (NS_OK == parentContent->QueryInterface(kIHTMLContentIID, (void**) &hc)) {
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if (NS_CONTENT_ATTR_HAS_VALUE ==
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hc->GetHTMLAttribute(nsHTMLAtoms::value, value)) {
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if (eHTMLUnit_Integer == value.GetUnit()) {
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// Use ordinal specified by the value attribute
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mOrdinal = value.GetIntValue();
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if (mOrdinal <= 0) {
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mOrdinal = 1;
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}
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}
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}
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NS_RELEASE(hc);
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}
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NS_RELEASE(parentContent);
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return mOrdinal + 1;
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}
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static const char* gLowerRomanCharsA = "ixcm";
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static const char* gUpperRomanCharsA = "IXCM";
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static const char* gLowerRomanCharsB = "vld?";
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static const char* gUpperRomanCharsB = "VLD?";
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static const char* gLowerAlphaChars = "abcdefghijklmnopqrstuvwxyz";
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static const char* gUpperAlphaChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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// XXX change roman/alpha to use unsigned math so that maxint and
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// maxnegint will work
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void
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nsBulletFrame::GetListItemText(nsIPresContext& aCX,
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const nsStyleList& aListStyle,
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nsString& result)
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{
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PRInt32 ordinal = mOrdinal;
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char cbuf[40];
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switch (aListStyle.mListStyleType) {
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case NS_STYLE_LIST_STYLE_DECIMAL:
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PR_snprintf(cbuf, sizeof(cbuf), "%ld", ordinal);
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result.Append(cbuf);
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break;
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case NS_STYLE_LIST_STYLE_LOWER_ROMAN:
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case NS_STYLE_LIST_STYLE_UPPER_ROMAN:
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{
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if (ordinal <= 0) {
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ordinal = 1;
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}
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nsAutoString addOn, decStr;
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decStr.Append(ordinal, 10);
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PRIntn len = decStr.Length();
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const PRUnichar* dp = decStr.GetUnicode();
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const PRUnichar* end = dp + len;
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PRIntn romanPos = len;
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PRIntn n;
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const char* achars;
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const char* bchars;
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if (aListStyle.mListStyleType == NS_STYLE_LIST_STYLE_LOWER_ROMAN) {
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achars = gLowerRomanCharsA;
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bchars = gLowerRomanCharsB;
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}
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else {
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achars = gUpperRomanCharsA;
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bchars = gUpperRomanCharsB;
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}
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for (; dp < end; dp++) {
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romanPos--;
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addOn.SetLength(0);
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switch(*dp) {
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case '3': addOn.Append(achars[romanPos]);
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case '2': addOn.Append(achars[romanPos]);
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case '1': addOn.Append(achars[romanPos]);
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break;
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case '4':
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addOn.Append(achars[romanPos]);
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// FALLTHROUGH
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case '5': case '6':
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case '7': case '8':
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addOn.Append(bchars[romanPos]);
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for(n=0;n<(*dp-'5');n++) {
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addOn.Append(achars[romanPos]);
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}
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break;
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case '9':
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addOn.Append(achars[romanPos]);
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addOn.Append(achars[romanPos+1]);
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break;
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default:
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break;
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}
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result.Append(addOn);
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}
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}
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break;
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case NS_STYLE_LIST_STYLE_LOWER_ALPHA:
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case NS_STYLE_LIST_STYLE_UPPER_ALPHA:
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{
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PRInt32 anOffset = -1;
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PRInt32 aBase = 26;
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PRInt32 ndex=0;
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PRInt32 root=1;
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PRInt32 next=aBase;
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PRInt32 expn=1;
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const char* chars =
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(aListStyle.mListStyleType == NS_STYLE_LIST_STYLE_LOWER_ALPHA)
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? gLowerAlphaChars : gUpperAlphaChars;
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// must be positive here...
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if (ordinal <= 0) {
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ordinal = 1;
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}
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ordinal--; // a == 0
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// scale up in baseN; exceed current value.
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while (next<=ordinal) {
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root=next;
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next*=aBase;
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expn++;
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}
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while (0!=(expn--)) {
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ndex = ((root<=ordinal) && (0!=root)) ? (ordinal/root): 0;
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ordinal %= root;
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if (root>1)
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result.Append(chars[ndex+anOffset]);
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else
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result.Append(chars[ndex]);
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root /= aBase;
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}
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}
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break;
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}
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result.Append(".");
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}
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#define MIN_BULLET_SIZE 5 // from laytext.c
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static nsresult
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UpdateBulletCB(nsIPresContext& aPresContext, nsIFrame* aFrame, PRIntn aStatus)
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{
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nsresult rv = NS_OK;
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if (NS_IMAGE_LOAD_STATUS_SIZE_AVAILABLE & aStatus) {
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// Now that the size is available, trigger a reflow of the bullet
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// frame.
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nsIPresShell* shell;
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shell = aPresContext.GetShell();
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if (nsnull != shell) {
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nsIReflowCommand* cmd;
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rv = NS_NewHTMLReflowCommand(&cmd, aFrame,
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nsIReflowCommand::ContentChanged);
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if (NS_OK == rv) {
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shell->EnterReflowLock();
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shell->AppendReflowCommand(cmd);
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NS_RELEASE(cmd);
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shell->ExitReflowLock();
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}
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NS_RELEASE(shell);
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}
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}
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return rv;
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}
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void
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nsBulletFrame::GetDesiredSize(nsIPresContext* aCX,
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const nsHTMLReflowState& aReflowState,
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nsHTMLReflowMetrics& aMetrics)
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{
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const nsStyleList* myList =
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(const nsStyleList*)mStyleContext->GetStyleData(eStyleStruct_List);
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nscoord ascent;
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if (myList->mListStyleImage.Length() > 0) {
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mImageLoader.SetURLSpec(myList->mListStyleImage);
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nsIURL* baseURL = nsnull;
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nsIHTMLContent* htmlContent;
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if (NS_SUCCEEDED(mContent->QueryInterface(kIHTMLContentIID, (void**)&htmlContent))) {
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htmlContent->GetBaseURL(baseURL);
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NS_RELEASE(htmlContent);
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}
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else {
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nsIDocument* doc;
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if (NS_SUCCEEDED(mContent->GetDocument(doc))) {
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doc->GetBaseURL(baseURL);
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NS_RELEASE(doc);
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}
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}
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mImageLoader.SetBaseURL(baseURL);
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NS_IF_RELEASE(baseURL);
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mImageLoader.GetDesiredSize(aCX, aReflowState, this, UpdateBulletCB,
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aMetrics);
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if (!mImageLoader.GetLoadImageFailed()) {
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nsHTMLContainerFrame::CreateViewForFrame(*aCX, this, mStyleContext,
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PR_FALSE);
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aMetrics.ascent = aMetrics.height;
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aMetrics.descent = 0;
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return;
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}
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}
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const nsStyleFont* myFont =
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(const nsStyleFont*)mStyleContext->GetStyleData(eStyleStruct_Font);
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nsIFontMetrics* fm = aCX->GetMetricsFor(myFont->mFont);
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nscoord bulletSize;
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float p2t;
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float t2p;
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nsAutoString text;
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switch (myList->mListStyleType) {
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case NS_STYLE_LIST_STYLE_NONE:
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aMetrics.width = 0;
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aMetrics.height = 0;
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aMetrics.ascent = 0;
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aMetrics.descent = 0;
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break;
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default:
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case NS_STYLE_LIST_STYLE_DISC:
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case NS_STYLE_LIST_STYLE_CIRCLE:
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case NS_STYLE_LIST_STYLE_BASIC:
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case NS_STYLE_LIST_STYLE_SQUARE:
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t2p = aCX->GetTwipsToPixels();
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fm->GetMaxAscent(ascent);
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bulletSize = NSTwipsToIntPixels(
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(nscoord)NSToIntRound(0.8f * (float(ascent) / 2.0f)), t2p);
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if (bulletSize < 1) {
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bulletSize = MIN_BULLET_SIZE;
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}
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p2t = aCX->GetPixelsToTwips();
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bulletSize = NSIntPixelsToTwips(bulletSize, p2t);
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mPadding.bottom = ascent / 8;
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aMetrics.width = mPadding.right + bulletSize;
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aMetrics.height = mPadding.bottom + bulletSize;
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aMetrics.ascent = mPadding.bottom + bulletSize;
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aMetrics.descent = 0;
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break;
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case NS_STYLE_LIST_STYLE_DECIMAL:
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case NS_STYLE_LIST_STYLE_LOWER_ROMAN:
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case NS_STYLE_LIST_STYLE_UPPER_ROMAN:
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case NS_STYLE_LIST_STYLE_LOWER_ALPHA:
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case NS_STYLE_LIST_STYLE_UPPER_ALPHA:
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GetListItemText(*aCX, *myList, text);
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fm->GetHeight(aMetrics.height);
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aReflowState.rendContext->SetFont(fm);
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aReflowState.rendContext->GetWidth(text, aMetrics.width);
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aMetrics.width += mPadding.right;
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fm->GetMaxAscent(aMetrics.ascent);
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fm->GetMaxDescent(aMetrics.descent);
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break;
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}
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NS_RELEASE(fm);
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}
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NS_IMETHODIMP
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nsBulletFrame::Reflow(nsIPresContext& aPresContext,
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nsHTMLReflowMetrics& aMetrics,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus)
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{
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// Get the base size
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GetDesiredSize(&aPresContext, aReflowState, aMetrics);
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// Add in the border and padding; split the top/bottom between the
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// ascent and descent to make things look nice
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nsMargin borderPadding;
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nsHTMLReflowState::ComputeBorderPaddingFor(this,
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aReflowState.parentReflowState,
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borderPadding);
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aMetrics.width += borderPadding.left + borderPadding.right;
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aMetrics.height += borderPadding.top + borderPadding.bottom;
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aMetrics.ascent += borderPadding.top;
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aMetrics.descent += borderPadding.bottom;
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if (nsnull != aMetrics.maxElementSize) {
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aMetrics.maxElementSize->width = aMetrics.width;
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aMetrics.maxElementSize->height = aMetrics.height;
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}
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aStatus = NS_FRAME_COMPLETE;
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return NS_OK;
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}
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