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gecko-dev/layout/generic/nsSimplePageSequence.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#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 "nsSubDocumentFrame.h"
#include "nsStyleConsts.h"
#include "nsRegion.h"
#include "nsCSSFrameConstructor.h"
#include "nsContentUtils.h"
#include "nsDisplayList.h"
#include "mozilla/Preferences.h"
#include "nsHTMLCanvasFrame.h"
#include "mozilla/dom/HTMLCanvasElement.h"
#include "nsICanvasRenderingContextInternal.h"
#include <algorithm>
// DateTime Includes
#include "nsDateTimeFormatCID.h"
#define OFFSET_NOT_SET -1
// Print Options
#include "nsIPrintOptions.h"
#include "nsGfxCIID.h"
#include "nsIServiceManager.h"
using namespace mozilla;
using namespace mozilla::dom;
static const char sPrintOptionsContractID[] = "@mozilla.org/gfx/printsettings-service;1";
//
#include "prlog.h"
#ifdef PR_LOGGING
PRLogModuleInfo *
GetLayoutPrintingLog()
{
static PRLogModuleInfo *sLog;
if (!sLog)
sLog = PR_NewLogModule("printing-layout");
return sLog;
}
#define PR_PL(_p1) PR_LOG(GetLayoutPrintingLog(), 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(nullptr),
mHeadFootFont(nullptr),
mPageNumFormat(nullptr),
mPageNumAndTotalsFormat(nullptr),
mDocTitle(nullptr),
mDocURL(nullptr),
mReflowSize(0,0),
mReflowMargin(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),
mCalledBeginPage(false),
mCurrentCanvasListSetup(false)
{
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,
aContext->StyleFont()->mLanguage));
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;
ResetPrintCanvasList();
}
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 = std::max(aReflowState.availableWidth,
nscoord(aWidth * PresContext()->GetPrintPreviewScale()));
aDesiredSize.height = std::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);
int16_t printType;
mPageData->mPrintSettings->GetPrintRange(&printType);
mPrintRangeType = printType;
nsIntMargin edgeTwips;
mPageData->mPrintSettings->GetEdgeInTwips(edgeTwips);
// sanity check the values. three inches are sometimes needed
int32_t 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;
// 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;
// Tile the pages vertically
nsHTMLReflowMetrics kidSize;
for (nsIFrame* kidFrame = mFrames.FirstChild(); nullptr != 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,
pageSize);
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, nullptr, kidSize, x, y, 0);
y += kidSize.height;
y += pageCSSMargin.bottom;
maxXMost = std::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 = aPresContext->PresShell()->FrameConstructor()->
CreateContinuingFrame(aPresContext, kidFrame, this);
// Add it to our child list
mFrames.InsertFrame(nullptr, kidFrame, continuingPage);
}
// Get the next page
kidFrame = kidFrame->GetNextSibling();
}
// Get Total Page Count
nsIFrame* page;
int32_t pageTot = 0;
for (page = mFrames.FirstChild(); page; page = page->GetNextSibling()) {
pageTot++;
}
// Set Page Number Info
int32_t pageNum = 1;
for (page = mFrames.FirstChild(); page; page = page->GetNextSibling()) {
nsPageFrame * pf = static_cast<nsPageFrame*>(page);
if (pf != nullptr) {
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(nullptr /* 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(int32_t* aPageNum)
{
NS_ENSURE_ARG_POINTER(aPageNum);
*aPageNum = mPageNum;
return NS_OK;
}
NS_IMETHODIMP
nsSimplePageSequenceFrame::GetNumPages(int32_t* 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(int32_t* aFromPage, int32_t* 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 != nullptr) {
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
int32_t 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;
int32_t 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;
}
void
GetPrintCanvasElementsInFrame(nsIFrame* aFrame, nsTArray<nsRefPtr<HTMLCanvasElement> >* aArr)
{
if (!aFrame) {
return;
}
for (nsIFrame::ChildListIterator childLists(aFrame);
!childLists.IsDone(); childLists.Next()) {
nsFrameList children = childLists.CurrentList();
for (nsFrameList::Enumerator e(children); !e.AtEnd(); e.Next()) {
nsIFrame* child = e.get();
// Check if child is a nsHTMLCanvasFrame.
nsHTMLCanvasFrame* canvasFrame = do_QueryFrame(child);
// If there is a canvasFrame, try to get actual canvas element.
if (canvasFrame) {
HTMLCanvasElement* canvas =
HTMLCanvasElement::FromContentOrNull(canvasFrame->GetContent());
nsCOMPtr<nsIPrintCallback> printCallback;
if (canvas &&
NS_SUCCEEDED(canvas->GetMozPrintCallback(getter_AddRefs(printCallback))) &&
printCallback) {
aArr->AppendElement(canvas);
continue;
}
}
if (!child->GetFirstPrincipalChild()) {
nsSubDocumentFrame* subdocumentFrame = do_QueryFrame(child);
if (subdocumentFrame) {
// Descend into the subdocument
nsIFrame* root = subdocumentFrame->GetSubdocumentRootFrame();
child = root;
}
}
// The current child is not a nsHTMLCanvasFrame OR it is but there is
// no HTMLCanvasElement on it. Check if children of `child` might
// contain a HTMLCanvasElement.
GetPrintCanvasElementsInFrame(child, aArr);
}
}
}
void
nsSimplePageSequenceFrame::DetermineWhetherToPrintPage()
{
// See whether we should print this page
mPrintThisPage = true;
bool printEvenPages, printOddPages;
mPageData->mPrintSettings->GetPrintOptions(nsIPrintSettings::kPrintEvenPages, &printEvenPages);
mPageData->mPrintSettings->GetPrintOptions(nsIPrintSettings::kPrintOddPages, &printOddPages);
// 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 = nullptr;
mPrintThisPage = false;
return;
} else {
int32_t length = mPageRanges.Length();
// Page ranges are pairs (start, end)
if (length && (length % 2 == 0)) {
mPrintThisPage = false;
int32_t 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;
}
}
NS_IMETHODIMP
nsSimplePageSequenceFrame::PrePrintNextPage(nsITimerCallback* aCallback, bool* aDone)
{
if (!mCurrentPageFrame) {
*aDone = true;
return NS_ERROR_FAILURE;
}
DetermineWhetherToPrintPage();
// Nothing to do if the current page doesn't get printed OR rendering to
// preview. For preview, the `CallPrintCallback` is called from within the
// HTMLCanvasElement::HandlePrintCallback.
if (!mPrintThisPage || !PresContext()->IsRootPaginatedDocument()) {
*aDone = true;
return NS_OK;
}
// If the canvasList is null, then generate it and start the render
// process for all the canvas.
if (!mCurrentCanvasListSetup) {
mCurrentCanvasListSetup = true;
GetPrintCanvasElementsInFrame(mCurrentPageFrame, &mCurrentCanvasList);
if (mCurrentCanvasList.Length() != 0) {
nsresult rv = NS_OK;
// Begin printing of the document
nsDeviceContext *dc = PresContext()->DeviceContext();
PR_PL(("\n"));
PR_PL(("***************** BeginPage *****************\n"));
rv = dc->BeginPage();
NS_ENSURE_SUCCESS(rv, rv);
mCalledBeginPage = true;
nsRefPtr<nsRenderingContext> renderingContext;
dc->CreateRenderingContext(*getter_AddRefs(renderingContext));
NS_ENSURE_TRUE(renderingContext, NS_ERROR_OUT_OF_MEMORY);
nsRefPtr<gfxASurface> renderingSurface =
renderingContext->ThebesContext()->CurrentSurface();
NS_ENSURE_TRUE(renderingSurface, NS_ERROR_OUT_OF_MEMORY);
for (int32_t i = mCurrentCanvasList.Length() - 1; i >= 0 ; i--) {
HTMLCanvasElement* canvas = mCurrentCanvasList[i];
nsIntSize size = canvas->GetSize();
nsRefPtr<gfxASurface> printSurface = renderingSurface->
CreateSimilarSurface(
gfxASurface::CONTENT_COLOR_ALPHA,
size
);
if (!printSurface) {
continue;
}
nsICanvasRenderingContextInternal* ctx = canvas->GetContextAtIndex(0);
if (!ctx) {
continue;
}
// Initialize the context with the new printSurface.
ctx->InitializeWithSurface(NULL, printSurface, size.width, size.height);
// Start the rendering process.
nsWeakFrame weakFrame = this;
canvas->DispatchPrintCallback(aCallback);
NS_ENSURE_STATE(weakFrame.IsAlive());
}
}
}
uint32_t doneCounter = 0;
for (int32_t i = mCurrentCanvasList.Length() - 1; i >= 0 ; i--) {
HTMLCanvasElement* canvas = mCurrentCanvasList[i];
if (canvas->IsPrintCallbackDone()) {
doneCounter++;
}
}
// If all canvas have finished rendering, return true, otherwise false.
*aDone = doneCounter == mCurrentCanvasList.Length();
return NS_OK;
}
NS_IMETHODIMP
nsSimplePageSequenceFrame::ResetPrintCanvasList()
{
for (int32_t i = mCurrentCanvasList.Length() - 1; i >= 0 ; i--) {
HTMLCanvasElement* canvas = mCurrentCanvasList[i];
canvas->ResetPrintCallback();
}
mCurrentCanvasList.Clear();
mCurrentCanvasListSetup = false;
return NS_OK;
}
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) {
return NS_ERROR_FAILURE;
}
nsresult rv = NS_OK;
DetermineWhetherToPrintPage();
if (mPrintThisPage) {
// Begin printing of the document
nsDeviceContext* dc = PresContext()->DeviceContext();
// 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);
int32_t printedPageNum = 1;
while (continuePrinting) {
if (PresContext()->IsRootPaginatedDocument()) {
if (!mCalledBeginPage) {
PR_PL(("\n"));
PR_PL(("***************** BeginPage *****************\n"));
rv = dc->BeginPage();
NS_ENSURE_SUCCESS(rv, rv);
} else {
mCalledBeginPage = false;
}
}
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);
}
ResetPrintCanvasList();
mPageNum++;
if (mCurrentPageFrame) {
mCurrentPageFrame = mCurrentPageFrame->GetNextSibling();
}
return rv;
}
static gfx3DMatrix
ComputePageSequenceTransform(nsIFrame* aFrame, float aAppUnitsPerPixel)
{
float scale = aFrame->PresContext()->GetPrintPreviewScale();
return gfx3DMatrix::ScalingMatrix(scale, scale, 1);
}
void
nsSimplePageSequenceFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists)
{
DisplayBorderBackgroundOutline(aBuilder, aLists);
nsDisplayList content;
{
// Clear clip state while we construct the children of the
// nsDisplayTransform, since they'll be in a different coordinate system.
DisplayListClipState::AutoSaveRestore clipState(aBuilder);
clipState.Clear();
nsIFrame* child = GetFirstPrincipalChild();
while (child) {
child->BuildDisplayListForStackingContext(aBuilder,
child->GetVisualOverflowRectRelativeToSelf(), &content);
child = child->GetNextSibling();
}
}
content.AppendNewToTop(new (aBuilder)
nsDisplayTransform(aBuilder, this, &content, ::ComputePageSequenceTransform));
aLists.Content()->AppendToTop(&content);
}
nsIAtom*
nsSimplePageSequenceFrame::GetType() const
{
return nsGkAtoms::sequenceFrame;
}
//------------------------------------------------------------------------------
void
nsSimplePageSequenceFrame::SetPageNumberFormat(PRUnichar * aFormatStr, bool aForPageNumOnly)
{
NS_ASSERTION(aFormatStr != nullptr, "Format string cannot be null!");
NS_ASSERTION(mPageData != nullptr, "mPageData string cannot be null!");
if (aForPageNumOnly) {
if (mPageData->mPageNumFormat != nullptr) {
nsMemory::Free(mPageData->mPageNumFormat);
}
mPageData->mPageNumFormat = aFormatStr;
} else {
if (mPageData->mPageNumAndTotalsFormat != nullptr) {
nsMemory::Free(mPageData->mPageNumAndTotalsFormat);
}
mPageData->mPageNumAndTotalsFormat = aFormatStr;
}
}
//------------------------------------------------------------------------------
void
nsSimplePageSequenceFrame::SetDateTimeStr(PRUnichar * aDateTimeStr)
{
NS_ASSERTION(aDateTimeStr != nullptr, "DateTime string cannot be null!");
NS_ASSERTION(mPageData != nullptr, "mPageData string cannot be null!");
if (mPageData->mDateTimeStr != nullptr) {
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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