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pjs/layout/generic/nsSimplePageSequence.cpp

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/* -*- 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 ***** */
#include "nsCOMPtr.h"
#include "nsReadableUtils.h"
#include "nsSimplePageSequence.h"
#include "nsPresContext.h"
#include "gfxContext.h"
#include "nsRenderingContext.h"
#include "nsGkAtoms.h"
#include "nsIPresShell.h"
#include "nsIPrintSettings.h"
#include "nsPageFrame.h"
#include "nsStyleConsts.h"
#include "nsRegion.h"
#include "nsCSSFrameConstructor.h"
#include "nsContentUtils.h"
#include "nsDisplayList.h"
#include "mozilla/Preferences.h"
// DateTime Includes
#include "nsDateTimeFormatCID.h"
#define OFFSET_NOT_SET -1
// Print Options
#include "nsIPrintSettings.h"
#include "nsIPrintOptions.h"
#include "nsGfxCIID.h"
#include "nsIServiceManager.h"
using namespace mozilla;
static const char sPrintOptionsContractID[] = "@mozilla.org/gfx/printsettings-service;1";
//
#include "prlog.h"
#ifdef PR_LOGGING
PRLogModuleInfo * kLayoutPrintingLogMod = PR_NewLogModule("printing-layout");
#define PR_PL(_p1) PR_LOG(kLayoutPrintingLogMod, PR_LOG_DEBUG, _p1)
#else
#define PR_PL(_p1)
#endif
// This object a shared by all the nsPageFrames
// parented to a SimplePageSequenceFrame
nsSharedPageData::nsSharedPageData() :
mDateTimeStr(nsnull),
mHeadFootFont(nsnull),
mPageNumFormat(nsnull),
mPageNumAndTotalsFormat(nsnull),
mDocTitle(nsnull),
mDocURL(nsnull),
mReflowSize(0,0),
mReflowMargin(0,0,0,0),
mExtraMargin(0,0,0,0),
mEdgePaperMargin(0,0,0,0),
mPageContentXMost(0),
mPageContentSize(0)
{
}
nsSharedPageData::~nsSharedPageData()
{
nsMemory::Free(mDateTimeStr);
delete mHeadFootFont;
nsMemory::Free(mPageNumFormat);
nsMemory::Free(mPageNumAndTotalsFormat);
if (mDocTitle) nsMemory::Free(mDocTitle);
if (mDocURL) nsMemory::Free(mDocURL);
}
nsIFrame*
NS_NewSimplePageSequenceFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
{
return new (aPresShell) nsSimplePageSequenceFrame(aContext);
}
NS_IMPL_FRAMEARENA_HELPERS(nsSimplePageSequenceFrame)
nsSimplePageSequenceFrame::nsSimplePageSequenceFrame(nsStyleContext* aContext) :
nsContainerFrame(aContext),
mTotalPages(-1),
mSelectionHeight(-1),
mYSelOffset(0)
{
nscoord halfInch = PresContext()->CSSTwipsToAppUnits(NS_INCHES_TO_TWIPS(0.5));
mMargin.SizeTo(halfInch, halfInch, halfInch, halfInch);
// XXX Unsafe to assume successful allocation
mPageData = new nsSharedPageData();
mPageData->mHeadFootFont = new nsFont(*PresContext()->GetDefaultFont(kGenericFont_serif));
mPageData->mHeadFootFont->size = nsPresContext::CSSPointsToAppUnits(10);
nsresult rv;
mPageData->mPrintOptions = do_GetService(sPrintOptionsContractID, &rv);
// Doing this here so we only have to go get these formats once
SetPageNumberFormat("pagenumber", "%1$d", true);
SetPageNumberFormat("pageofpages", "%1$d of %2$d", false);
}
nsSimplePageSequenceFrame::~nsSimplePageSequenceFrame()
{
delete mPageData;
}
NS_QUERYFRAME_HEAD(nsSimplePageSequenceFrame)
NS_QUERYFRAME_ENTRY(nsIPageSequenceFrame)
NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
//----------------------------------------------------------------------
void
nsSimplePageSequenceFrame::SetDesiredSize(nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nscoord aWidth,
nscoord aHeight)
{
// Aim to fill the whole size of the document, not only so we
// can act as a background in print preview but also handle overflow
// in child page frames correctly.
// Use availableWidth so we don't cause a needless horizontal scrollbar.
aDesiredSize.width = NS_MAX(aReflowState.availableWidth,
nscoord(aWidth * PresContext()->GetPrintPreviewScale()));
aDesiredSize.height = NS_MAX(aReflowState.ComputedHeight(),
nscoord(aHeight * PresContext()->GetPrintPreviewScale()));
}
NS_IMETHODIMP
nsSimplePageSequenceFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
NS_PRECONDITION(aPresContext->IsRootPaginatedDocument(),
"A Page Sequence is only for real pages");
DO_GLOBAL_REFLOW_COUNT("nsSimplePageSequenceFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
NS_FRAME_TRACE_REFLOW_IN("nsSimplePageSequenceFrame::Reflow");
aStatus = NS_FRAME_COMPLETE; // we're always complete
// Don't do incremental reflow until we've taught tables how to do
// it right in paginated mode.
if (!(GetStateBits() & NS_FRAME_FIRST_REFLOW)) {
// Return our desired size
SetDesiredSize(aDesiredSize, aReflowState, mSize.width, mSize.height);
aDesiredSize.SetOverflowAreasToDesiredBounds();
FinishAndStoreOverflow(&aDesiredSize);
return NS_OK;
}
// See if we can get a Print Settings from the Context
if (!mPageData->mPrintSettings &&
aPresContext->Medium() == nsGkAtoms::print) {
mPageData->mPrintSettings = aPresContext->GetPrintSettings();
}
// now get out margins & edges
if (mPageData->mPrintSettings) {
nsIntMargin unwriteableTwips;
mPageData->mPrintSettings->GetUnwriteableMarginInTwips(unwriteableTwips);
NS_ASSERTION(unwriteableTwips.left >= 0 && unwriteableTwips.top >= 0 &&
unwriteableTwips.right >= 0 && unwriteableTwips.bottom >= 0,
"Unwriteable twips should be non-negative");
nsIntMargin marginTwips;
mPageData->mPrintSettings->GetMarginInTwips(marginTwips);
mMargin = aPresContext->CSSTwipsToAppUnits(marginTwips + unwriteableTwips);
PRInt16 printType;
mPageData->mPrintSettings->GetPrintRange(&printType);
mPrintRangeType = printType;
nsIntMargin edgeTwips;
mPageData->mPrintSettings->GetEdgeInTwips(edgeTwips);
// sanity check the values. three inches are sometimes needed
PRInt32 inchInTwips = NS_INCHES_TO_INT_TWIPS(3.0);
edgeTwips.top = clamped(edgeTwips.top, 0, inchInTwips);
edgeTwips.bottom = clamped(edgeTwips.bottom, 0, inchInTwips);
edgeTwips.left = clamped(edgeTwips.left, 0, inchInTwips);
edgeTwips.right = clamped(edgeTwips.right, 0, inchInTwips);
mPageData->mEdgePaperMargin =
aPresContext->CSSTwipsToAppUnits(edgeTwips + unwriteableTwips);
}
// *** Special Override ***
// If this is a sub-sdoc (meaning it doesn't take the whole page)
// and if this Document is in the upper left hand corner
// we need to suppress the top margin or it will reflow too small
nsSize pageSize = aPresContext->GetPageSize();
mPageData->mReflowSize = pageSize;
// If we're printing a selection, we need to reflow with
// unconstrained height, to make sure we'll get to the selection
// even if it's beyond the first page of content.
if (nsIPrintSettings::kRangeSelection == mPrintRangeType) {
mPageData->mReflowSize.height = NS_UNCONSTRAINEDSIZE;
}
mPageData->mReflowMargin = mMargin;
// Compute the size of each page and the x coordinate that each page will
// be placed at
nscoord extraThreshold = NS_MAX(pageSize.width, pageSize.height)/10;
PRInt32 gapInTwips = Preferences::GetInt("print.print_extra_margin");
gapInTwips = NS_MAX(0, gapInTwips);
nscoord extraGap = aPresContext->CSSTwipsToAppUnits(gapInTwips);
extraGap = NS_MIN(extraGap, extraThreshold); // clamp to 1/10 of the largest dim of the page
nsMargin extraMargin(0,0,0,0);
if (aPresContext->IsScreen()) {
extraMargin.SizeTo(extraGap, extraGap, extraGap, extraGap);
}
mPageData->mExtraMargin = extraMargin;
// We use the CSS "margin" property on the -moz-page pseudoelement
// to determine the space between each page in print preview.
// Keep a running y-offset for each page.
nscoord y = 0;
nscoord maxXMost = 0;
nsSize availSize(pageSize.width + extraMargin.LeftRight(),
pageSize.height + extraMargin.TopBottom());
// Tile the pages vertically
nsHTMLReflowMetrics kidSize;
for (nsIFrame* kidFrame = mFrames.FirstChild(); nsnull != kidFrame; ) {
// Set the shared data into the page frame before reflow
nsPageFrame * pf = static_cast<nsPageFrame*>(kidFrame);
pf->SetSharedPageData(mPageData);
// Reflow the page
nsHTMLReflowState kidReflowState(aPresContext, aReflowState, kidFrame,
availSize);
nsReflowStatus status;
kidReflowState.SetComputedWidth(kidReflowState.availableWidth);
//kidReflowState.SetComputedHeight(kidReflowState.availableHeight);
PR_PL(("AV W: %d H: %d\n", kidReflowState.availableWidth, kidReflowState.availableHeight));
nsMargin pageCSSMargin = kidReflowState.mComputedMargin;
y += pageCSSMargin.top;
const nscoord x = pageCSSMargin.left;
// Place and size the page. If the page is narrower than our
// max width then center it horizontally
ReflowChild(kidFrame, aPresContext, kidSize, kidReflowState, x, y, 0, status);
FinishReflowChild(kidFrame, aPresContext, nsnull, kidSize, x, y, 0);
y += kidSize.height;
y += pageCSSMargin.bottom;
maxXMost = NS_MAX(maxXMost, x + kidSize.width + pageCSSMargin.right);
// Is the page complete?
nsIFrame* kidNextInFlow = kidFrame->GetNextInFlow();
if (NS_FRAME_IS_FULLY_COMPLETE(status)) {
NS_ASSERTION(!kidNextInFlow, "bad child flow list");
} else if (!kidNextInFlow) {
// The page isn't complete and it doesn't have a next-in-flow, so
// create a continuing page.
nsIFrame* continuingPage;
nsresult rv = aPresContext->PresShell()->FrameConstructor()->
CreateContinuingFrame(aPresContext, kidFrame, this, &continuingPage);
if (NS_FAILED(rv)) {
break;
}
// Add it to our child list
mFrames.InsertFrame(nsnull, kidFrame, continuingPage);
}
// Get the next page
kidFrame = kidFrame->GetNextSibling();
}
// Get Total Page Count
nsIFrame* page;
PRInt32 pageTot = 0;
for (page = mFrames.FirstChild(); page; page = page->GetNextSibling()) {
pageTot++;
}
// Set Page Number Info
PRInt32 pageNum = 1;
for (page = mFrames.FirstChild(); page; page = page->GetNextSibling()) {
nsPageFrame * pf = static_cast<nsPageFrame*>(page);
if (pf != nsnull) {
pf->SetPageNumInfo(pageNum, pageTot);
}
pageNum++;
}
// Create current Date/Time String
if (!mDateFormatter)
mDateFormatter = do_CreateInstance(NS_DATETIMEFORMAT_CONTRACTID);
NS_ENSURE_TRUE(mDateFormatter, NS_ERROR_FAILURE);
nsAutoString formattedDateString;
time_t ltime;
time( &ltime );
if (NS_SUCCEEDED(mDateFormatter->FormatTime(nsnull /* nsILocale* locale */,
kDateFormatShort,
kTimeFormatNoSeconds,
ltime,
formattedDateString))) {
PRUnichar * uStr = ToNewUnicode(formattedDateString);
SetDateTimeStr(uStr); // memory will be freed
}
// Return our desired size
// Adjust the reflow size by PrintPreviewScale so the scrollbars end up the
// correct size
SetDesiredSize(aDesiredSize, aReflowState, maxXMost, y);
aDesiredSize.SetOverflowAreasToDesiredBounds();
FinishAndStoreOverflow(&aDesiredSize);
// cache the size so we can set the desired size
// for the other reflows that happen
mSize.width = maxXMost;
mSize.height = y;
NS_FRAME_TRACE_REFLOW_OUT("nsSimplePageSequeceFrame::Reflow", aStatus);
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
return NS_OK;
}
//----------------------------------------------------------------------
#ifdef DEBUG
NS_IMETHODIMP
nsSimplePageSequenceFrame::GetFrameName(nsAString& aResult) const
{
return MakeFrameName(NS_LITERAL_STRING("SimplePageSequence"), aResult);
}
#endif
//====================================================================
//== Asynch Printing
//====================================================================
NS_IMETHODIMP
nsSimplePageSequenceFrame::GetCurrentPageNum(PRInt32* aPageNum)
{
NS_ENSURE_ARG_POINTER(aPageNum);
*aPageNum = mPageNum;
return NS_OK;
}
NS_IMETHODIMP
nsSimplePageSequenceFrame::GetNumPages(PRInt32* aNumPages)
{
NS_ENSURE_ARG_POINTER(aNumPages);
*aNumPages = mTotalPages;
return NS_OK;
}
NS_IMETHODIMP
nsSimplePageSequenceFrame::IsDoingPrintRange(bool* aDoing)
{
NS_ENSURE_ARG_POINTER(aDoing);
*aDoing = mDoingPageRange;
return NS_OK;
}
NS_IMETHODIMP
nsSimplePageSequenceFrame::GetPrintRange(PRInt32* aFromPage, PRInt32* aToPage)
{
NS_ENSURE_ARG_POINTER(aFromPage);
NS_ENSURE_ARG_POINTER(aToPage);
*aFromPage = mFromPageNum;
*aToPage = mToPageNum;
return NS_OK;
}
// Helper Function
void
nsSimplePageSequenceFrame::SetPageNumberFormat(const char* aPropName, const char* aDefPropVal, bool aPageNumOnly)
{
// Doing this here so we only have to go get these formats once
nsXPIDLString pageNumberFormat;
// Now go get the Localized Page Formating String
nsresult rv =
nsContentUtils::GetLocalizedString(nsContentUtils::ePRINTING_PROPERTIES,
aPropName, pageNumberFormat);
if (NS_FAILED(rv)) { // back stop formatting
pageNumberFormat.AssignASCII(aDefPropVal);
}
// Sets the format into a static data member which will own the memory and free it
PRUnichar* uStr = ToNewUnicode(pageNumberFormat);
if (uStr != nsnull) {
SetPageNumberFormat(uStr, aPageNumOnly); // nsPageFrame will own the memory
}
}
NS_IMETHODIMP
nsSimplePageSequenceFrame::StartPrint(nsPresContext* aPresContext,
nsIPrintSettings* aPrintSettings,
PRUnichar* aDocTitle,
PRUnichar* aDocURL)
{
NS_ENSURE_ARG_POINTER(aPresContext);
NS_ENSURE_ARG_POINTER(aPrintSettings);
if (!mPageData->mPrintSettings) {
mPageData->mPrintSettings = aPrintSettings;
}
// Only set them if they are not null
if (aDocTitle) mPageData->mDocTitle = aDocTitle;
if (aDocURL) mPageData->mDocURL = aDocURL;
aPrintSettings->GetStartPageRange(&mFromPageNum);
aPrintSettings->GetEndPageRange(&mToPageNum);
aPrintSettings->GetPageRanges(mPageRanges);
mDoingPageRange = nsIPrintSettings::kRangeSpecifiedPageRange == mPrintRangeType ||
nsIPrintSettings::kRangeSelection == mPrintRangeType;
// If printing a range of pages make sure at least the starting page
// number is valid
PRInt32 totalPages = mFrames.GetLength();
if (mDoingPageRange) {
if (mFromPageNum > totalPages) {
return NS_ERROR_INVALID_ARG;
}
}
// Begin printing of the document
nsresult rv = NS_OK;
// Determine if we are rendering only the selection
aPresContext->SetIsRenderingOnlySelection(nsIPrintSettings::kRangeSelection == mPrintRangeType);
if (mDoingPageRange) {
// XXX because of the hack for making the selection all print on one page
// we must make sure that the page is sized correctly before printing.
nscoord height = aPresContext->GetPageSize().height;
PRInt32 pageNum = 1;
nscoord y = 0;//mMargin.top;
for (nsIFrame* page = mFrames.FirstChild(); page;
page = page->GetNextSibling()) {
if (pageNum >= mFromPageNum && pageNum <= mToPageNum) {
nsRect rect = page->GetRect();
rect.y = y;
rect.height = height;
page->SetRect(rect);
y += rect.height + mMargin.top + mMargin.bottom;
}
pageNum++;
}
// adjust total number of pages
if (nsIPrintSettings::kRangeSelection != mPrintRangeType) {
totalPages = pageNum - 1;
}
}
mPageNum = 1;
mCurrentPageFrame = mFrames.FirstChild();
if (mTotalPages == -1) {
mTotalPages = totalPages;
}
return rv;
}
NS_IMETHODIMP
nsSimplePageSequenceFrame::PrintNextPage()
{
// Print each specified page
// pageNum keeps track of the current page and what pages are printing
//
// printedPageNum keeps track of the current page number to be printed
// Note: When print al the pages or a page range the printed page shows the
// actual page number, when printing selection it prints the page number starting
// with the first page of the selection. For example if the user has a
// selection that starts on page 2 and ends on page 3, the page numbers when
// print are 1 and then two (which is different than printing a page range, where
// the page numbers would have been 2 and then 3)
if (mCurrentPageFrame == nsnull) {
return NS_ERROR_FAILURE;
}
bool printEvenPages, printOddPages;
mPageData->mPrintSettings->GetPrintOptions(nsIPrintSettings::kPrintEvenPages, &printEvenPages);
mPageData->mPrintSettings->GetPrintOptions(nsIPrintSettings::kPrintOddPages, &printOddPages);
// Begin printing of the document
nsDeviceContext *dc = PresContext()->DeviceContext();
nsresult rv = NS_OK;
// See whether we should print this page
mPrintThisPage = true;
// If printing a range of pages check whether the page number is in the
// range of pages to print
if (mDoingPageRange) {
if (mPageNum < mFromPageNum) {
mPrintThisPage = false;
} else if (mPageNum > mToPageNum) {
mPageNum++;
mCurrentPageFrame = nsnull;
return NS_OK;
} else {
PRInt32 length = mPageRanges.Length();
// Page ranges are pairs (start, end)
if (length && (length % 2 == 0)) {
mPrintThisPage = false;
PRInt32 i;
for (i = 0; i < length; i += 2) {
if (mPageRanges[i] <= mPageNum && mPageNum <= mPageRanges[i+1]) {
mPrintThisPage = true;
break;
}
}
}
}
}
// Check for printing of odd and even pages
if (mPageNum & 0x1) {
if (!printOddPages) {
mPrintThisPage = false; // don't print odd numbered page
}
} else {
if (!printEvenPages) {
mPrintThisPage = false; // don't print even numbered page
}
}
if (nsIPrintSettings::kRangeSelection == mPrintRangeType) {
mPrintThisPage = true;
}
if (mPrintThisPage) {
// XXX This is temporary fix for printing more than one page of a selection
// This does a poor man's "dump" pagination (see Bug 89353)
// It has laid out as one long page and now we are just moving or view up/down
// one page at a time and printing the contents of what is exposed by the rect.
// currently this does not work for IFrames
// I will soon improve this to work with IFrames
bool continuePrinting = true;
nscoord width, height;
width = PresContext()->GetPageSize().width;
height = PresContext()->GetPageSize().height;
height -= mMargin.top + mMargin.bottom;
width -= mMargin.left + mMargin.right;
nscoord selectionY = height;
nsIFrame* conFrame = mCurrentPageFrame->GetFirstPrincipalChild();
if (mSelectionHeight >= 0) {
conFrame->SetPosition(conFrame->GetPosition() + nsPoint(0, -mYSelOffset));
nsContainerFrame::PositionChildViews(conFrame);
}
// cast the frame to be a page frame
nsPageFrame * pf = static_cast<nsPageFrame*>(mCurrentPageFrame);
pf->SetPageNumInfo(mPageNum, mTotalPages);
pf->SetSharedPageData(mPageData);
PRInt32 printedPageNum = 1;
while (continuePrinting) {
if (PresContext()->IsRootPaginatedDocument()) {
PR_PL(("\n"));
PR_PL(("***************** BeginPage *****************\n"));
rv = dc->BeginPage();
NS_ENSURE_SUCCESS(rv, rv);
}
PR_PL(("SeqFr::PrintNextPage -> %p PageNo: %d", pf, mPageNum));
nsRefPtr<nsRenderingContext> renderingContext;
dc->CreateRenderingContext(*getter_AddRefs(renderingContext));
NS_ENSURE_TRUE(renderingContext, NS_ERROR_OUT_OF_MEMORY);
nsRect drawingRect(nsPoint(0, 0),
mCurrentPageFrame->GetSize());
nsRegion drawingRegion(drawingRect);
nsLayoutUtils::PaintFrame(renderingContext, mCurrentPageFrame,
drawingRegion, NS_RGBA(0,0,0,0),
nsLayoutUtils::PAINT_SYNC_DECODE_IMAGES);
if (mSelectionHeight >= 0 && selectionY < mSelectionHeight) {
selectionY += height;
printedPageNum++;
pf->SetPageNumInfo(printedPageNum, mTotalPages);
conFrame->SetPosition(conFrame->GetPosition() + nsPoint(0, -height));
nsContainerFrame::PositionChildViews(conFrame);
PR_PL(("***************** End Page (PrintNextPage) *****************\n"));
rv = dc->EndPage();
NS_ENSURE_SUCCESS(rv, rv);
} else {
continuePrinting = false;
}
}
}
return rv;
}
NS_IMETHODIMP
nsSimplePageSequenceFrame::DoPageEnd()
{
nsresult rv = NS_OK;
if (PresContext()->IsRootPaginatedDocument() && mPrintThisPage) {
PR_PL(("***************** End Page (DoPageEnd) *****************\n"));
rv = PresContext()->DeviceContext()->EndPage();
NS_ENSURE_SUCCESS(rv, rv);
}
mPageNum++;
if (mCurrentPageFrame) {
mCurrentPageFrame = mCurrentPageFrame->GetNextSibling();
}
return rv;
}
static void PaintPageSequence(nsIFrame* aFrame, nsRenderingContext* aCtx,
const nsRect& aDirtyRect, nsPoint aPt)
{
static_cast<nsSimplePageSequenceFrame*>(aFrame)->PaintPageSequence(*aCtx, aDirtyRect, aPt);
}
//------------------------------------------------------------------------------
void
nsSimplePageSequenceFrame::PaintPageSequence(nsRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsPoint aPt) {
nsRect rect = aDirtyRect;
float scale = PresContext()->GetPrintPreviewScale();
aRenderingContext.PushState();
nsPoint framePos = aPt;
aRenderingContext.Translate(framePos);
rect -= framePos;
aRenderingContext.Scale(scale, scale);
rect.ScaleRoundOut(1.0f / scale);
// Now the rect and the rendering coordinates are are relative to this frame.
// Loop over the pages and paint them.
nsIFrame* child = GetFirstPrincipalChild();
while (child) {
nsPoint pt = child->GetPosition();
// The rendering context has to be translated before each call to PaintFrame
aRenderingContext.PushState();
aRenderingContext.Translate(pt);
nsLayoutUtils::PaintFrame(&aRenderingContext, child,
nsRegion(rect - pt), NS_RGBA(0,0,0,0),
nsLayoutUtils::PAINT_SYNC_DECODE_IMAGES);
aRenderingContext.PopState();
child = child->GetNextSibling();
}
aRenderingContext.PopState();
}
NS_IMETHODIMP
nsSimplePageSequenceFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists)
{
nsresult rv = DisplayBorderBackgroundOutline(aBuilder, aLists);
NS_ENSURE_SUCCESS(rv, rv);
rv = aLists.Content()->AppendNewToTop(new (aBuilder)
nsDisplayGeneric(aBuilder, this, ::PaintPageSequence, "PageSequence",
nsDisplayItem::TYPE_PAGE_SEQUENCE));
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
nsIAtom*
nsSimplePageSequenceFrame::GetType() const
{
return nsGkAtoms::sequenceFrame;
}
//------------------------------------------------------------------------------
void
nsSimplePageSequenceFrame::SetPageNumberFormat(PRUnichar * aFormatStr, bool aForPageNumOnly)
{
NS_ASSERTION(aFormatStr != nsnull, "Format string cannot be null!");
NS_ASSERTION(mPageData != nsnull, "mPageData string cannot be null!");
if (aForPageNumOnly) {
if (mPageData->mPageNumFormat != nsnull) {
nsMemory::Free(mPageData->mPageNumFormat);
}
mPageData->mPageNumFormat = aFormatStr;
} else {
if (mPageData->mPageNumAndTotalsFormat != nsnull) {
nsMemory::Free(mPageData->mPageNumAndTotalsFormat);
}
mPageData->mPageNumAndTotalsFormat = aFormatStr;
}
}
//------------------------------------------------------------------------------
void
nsSimplePageSequenceFrame::SetDateTimeStr(PRUnichar * aDateTimeStr)
{
NS_ASSERTION(aDateTimeStr != nsnull, "DateTime string cannot be null!");
NS_ASSERTION(mPageData != nsnull, "mPageData string cannot be null!");
if (mPageData->mDateTimeStr != nsnull) {
nsMemory::Free(mPageData->mDateTimeStr);
}
mPageData->mDateTimeStr = aDateTimeStr;
}
//------------------------------------------------------------------------------
// For Shrink To Fit
//
// Return the percentage that the page needs to shrink to
//
NS_IMETHODIMP
nsSimplePageSequenceFrame::GetSTFPercent(float& aSTFPercent)
{
NS_ENSURE_TRUE(mPageData, NS_ERROR_UNEXPECTED);
aSTFPercent = 1.0f;
if (mPageData && (mPageData->mPageContentXMost > mPageData->mPageContentSize)) {
aSTFPercent = float(mPageData->mPageContentSize) / float(mPageData->mPageContentXMost);
}
return NS_OK;
}
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