// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/renderer/print_web_view_helper.h"
#include <string>
#include "base/auto_reset.h"
#include "base/command_line.h"
#include "base/json/json_writer.h"
#include "base/logging.h"
#include "base/metrics/histogram.h"
#include "base/process_util.h"
#include "base/stringprintf.h"
#include "base/string_number_conversions.h"
#include "base/utf_string_conversions.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/print_messages.h"
#include "chrome/common/render_messages.h"
#include "chrome/renderer/prerender/prerender_helper.h"
#include "content/public/renderer/render_thread.h"
#include "content/public/renderer/render_view.h"
#include "grit/browser_resources.h"
#include "grit/generated_resources.h"
#include "printing/metafile.h"
#include "printing/metafile_impl.h"
#include "printing/units.h"
#include "skia/ext/vector_platform_device_skia.h"
#include "third_party/WebKit/Source/Platform/chromium/public/WebSize.h"
#include "third_party/WebKit/Source/Platform/chromium/public/WebURLRequest.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebConsoleMessage.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebDocument.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebElement.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebPlugin.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebPluginDocument.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebPrintParams.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebPrintScalingOption.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebScriptSource.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebSettings.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/resource/resource_bundle.h"
#include "webkit/glue/webpreferences.h"
namespace {
const double kMinDpi = 1.0;
const char kPageLoadScriptFormat[] =
"document.open(); document.write(%s); document.close();";
const char kPageSetupScriptFormat[] = "setup(%s);";
void ExecuteScript(WebKit::WebFrame* frame,
const char* script_format,
const base::Value& parameters) {
std::string json;
base::JSONWriter::Write(¶meters, &json);
std::string script = StringPrintf(script_format, json.c_str());
frame->executeScript(WebKit::WebString(UTF8ToUTF16(script)));
}
int GetDPI(const PrintMsg_Print_Params* print_params) {
#if defined(OS_MACOSX)
// On the Mac, the printable area is in points, don't do any scaling based
// on dpi.
return printing::kPointsPerInch;
#else
return static_cast<int>(print_params->dpi);
#endif // defined(OS_MACOSX)
}
bool PrintMsg_Print_Params_IsValid(const PrintMsg_Print_Params& params) {
return !params.content_size.IsEmpty() && !params.page_size.IsEmpty() &&
!params.printable_area.IsEmpty() && params.document_cookie &&
params.desired_dpi && params.max_shrink && params.min_shrink &&
params.dpi && (params.margin_top >= 0) && (params.margin_left >= 0);
}
bool PageLayoutIsEqual(const PrintMsg_PrintPages_Params& oldParams,
const PrintMsg_PrintPages_Params& newParams) {
return oldParams.params.content_size == newParams.params.content_size &&
oldParams.params.printable_area == newParams.params.printable_area &&
oldParams.params.page_size == newParams.params.page_size &&
oldParams.params.margin_top == newParams.params.margin_top &&
oldParams.params.margin_left == newParams.params.margin_left &&
oldParams.params.desired_dpi == newParams.params.desired_dpi &&
oldParams.params.dpi == newParams.params.dpi;
}
bool PrintMsg_Print_Params_IsEqual(
const PrintMsg_PrintPages_Params& oldParams,
const PrintMsg_PrintPages_Params& newParams) {
return PageLayoutIsEqual(oldParams, newParams) &&
oldParams.params.max_shrink == newParams.params.max_shrink &&
oldParams.params.min_shrink == newParams.params.min_shrink &&
oldParams.params.selection_only == newParams.params.selection_only &&
oldParams.params.supports_alpha_blend ==
newParams.params.supports_alpha_blend &&
oldParams.pages.size() == newParams.pages.size() &&
oldParams.params.print_to_pdf == newParams.params.print_to_pdf &&
oldParams.params.print_scaling_option ==
newParams.params.print_scaling_option &&
oldParams.params.display_header_footer ==
newParams.params.display_header_footer &&
oldParams.params.date == newParams.params.date &&
oldParams.params.title == newParams.params.title &&
oldParams.params.url == newParams.params.url &&
std::equal(oldParams.pages.begin(), oldParams.pages.end(),
newParams.pages.begin()) &&
oldParams.params.should_print_backgrounds ==
newParams.params.should_print_backgrounds;
}
PrintMsg_Print_Params GetCssPrintParams(
WebKit::WebFrame* frame,
int page_index,
const PrintMsg_Print_Params& page_params) {
PrintMsg_Print_Params page_css_params = page_params;
int dpi = GetDPI(&page_params);
using printing::ConvertUnit;
using printing::kPixelsPerInch;
WebKit::WebSize page_size_in_pixels(
ConvertUnit(page_params.page_size.width(), dpi, kPixelsPerInch),
ConvertUnit(page_params.page_size.height(), dpi, kPixelsPerInch));
int margin_top_in_pixels =
ConvertUnit(page_params.margin_top, dpi, kPixelsPerInch);
int margin_right_in_pixels = ConvertUnit(
page_params.page_size.width() -
page_params.content_size.width() - page_params.margin_left,
dpi, kPixelsPerInch);
int margin_bottom_in_pixels = ConvertUnit(
page_params.page_size.height() -
page_params.content_size.height() - page_params.margin_top,
dpi, kPixelsPerInch);
int margin_left_in_pixels = ConvertUnit(
page_params.margin_left,
dpi, kPixelsPerInch);
WebKit::WebSize original_page_size_in_pixels = page_size_in_pixels;
if (frame) {
frame->pageSizeAndMarginsInPixels(page_index,
page_size_in_pixels,
margin_top_in_pixels,
margin_right_in_pixels,
margin_bottom_in_pixels,
margin_left_in_pixels);
}
int new_content_width = page_size_in_pixels.width -
margin_left_in_pixels - margin_right_in_pixels;
int new_content_height = page_size_in_pixels.height -
margin_top_in_pixels - margin_bottom_in_pixels;
// Invalid page size and/or margins. We just use the default setting.
if (new_content_width < 1 || new_content_height < 1) {
CHECK(frame != NULL);
page_css_params = GetCssPrintParams(NULL, page_index, page_params);
return page_css_params;
}
page_css_params.content_size = gfx::Size(
ConvertUnit(new_content_width, kPixelsPerInch, dpi),
ConvertUnit(new_content_height, kPixelsPerInch, dpi));
if (original_page_size_in_pixels != page_size_in_pixels) {
page_css_params.page_size = gfx::Size(
ConvertUnit(page_size_in_pixels.width, kPixelsPerInch, dpi),
ConvertUnit(page_size_in_pixels.height, kPixelsPerInch, dpi));
} else {
// Printing frame doesn't have any page size css. Pixels to dpi conversion
// causes rounding off errors. Therefore use the default page size values
// directly.
page_css_params.page_size = page_params.page_size;
}
page_css_params.margin_top =
ConvertUnit(margin_top_in_pixels, kPixelsPerInch, dpi);
page_css_params.margin_left =
ConvertUnit(margin_left_in_pixels, kPixelsPerInch, dpi);
return page_css_params;
}
double FitPrintParamsToPage(const PrintMsg_Print_Params& page_params,
PrintMsg_Print_Params* params_to_fit) {
double content_width =
static_cast<double>(params_to_fit->content_size.width());
double content_height =
static_cast<double>(params_to_fit->content_size.height());
int default_page_size_height = page_params.page_size.height();
int default_page_size_width = page_params.page_size.width();
int css_page_size_height = params_to_fit->page_size.height();
int css_page_size_width = params_to_fit->page_size.width();
double scale_factor = 1.0f;
if (page_params.page_size == params_to_fit->page_size)
return scale_factor;
if (default_page_size_width < css_page_size_width ||
default_page_size_height < css_page_size_height) {
double ratio_width =
static_cast<double>(default_page_size_width) / css_page_size_width;
double ratio_height =
static_cast<double>(default_page_size_height) / css_page_size_height;
scale_factor = ratio_width < ratio_height ? ratio_width : ratio_height;
content_width *= scale_factor;
content_height *= scale_factor;
}
params_to_fit->margin_top = static_cast<int>(
(default_page_size_height - css_page_size_height * scale_factor) / 2 +
(params_to_fit->margin_top * scale_factor));
params_to_fit->margin_left = static_cast<int>(
(default_page_size_width - css_page_size_width * scale_factor) / 2 +
(params_to_fit->margin_left * scale_factor));
params_to_fit->content_size = gfx::Size(
static_cast<int>(content_width), static_cast<int>(content_height));
params_to_fit->page_size = page_params.page_size;
return scale_factor;
}
void CalculatePageLayoutFromPrintParams(
const PrintMsg_Print_Params& params,
printing::PageSizeMargins* page_layout_in_points) {
int dpi = GetDPI(¶ms);
int content_width = params.content_size.width();
int content_height = params.content_size.height();
int margin_bottom = params.page_size.height() -
content_height - params.margin_top;
int margin_right = params.page_size.width() -
content_width - params.margin_left;
using printing::ConvertUnit;
using printing::kPointsPerInch;
page_layout_in_points->content_width =
ConvertUnit(content_width, dpi, kPointsPerInch);
page_layout_in_points->content_height =
ConvertUnit(content_height, dpi, kPointsPerInch);
page_layout_in_points->margin_top =
ConvertUnit(params.margin_top, dpi, kPointsPerInch);
page_layout_in_points->margin_right =
ConvertUnit(margin_right, dpi, kPointsPerInch);
page_layout_in_points->margin_bottom =
ConvertUnit(margin_bottom, dpi, kPointsPerInch);
page_layout_in_points->margin_left =
ConvertUnit(params.margin_left, dpi, kPointsPerInch);
}
void EnsureOrientationMatches(const PrintMsg_Print_Params& css_params,
PrintMsg_Print_Params* page_params) {
if ((page_params->page_size.width() > page_params->page_size.height()) ==
(css_params.page_size.width() > css_params.page_size.height())) {
return;
}
// Swap the |width| and |height| values.
page_params->page_size.SetSize(page_params->page_size.height(),
page_params->page_size.width());
page_params->content_size.SetSize(page_params->content_size.height(),
page_params->content_size.width());
page_params->printable_area.set_size(
gfx::Size(page_params->printable_area.height(),
page_params->printable_area.width()));
}
void ComputeWebKitPrintParamsInDesiredDpi(
const PrintMsg_Print_Params& print_params,
WebKit::WebPrintParams* webkit_print_params) {
int dpi = GetDPI(&print_params);
webkit_print_params->printerDPI = dpi;
webkit_print_params->printScalingOption = print_params.print_scaling_option;
using printing::ConvertUnit;
webkit_print_params->printContentArea.width =
ConvertUnit(print_params.content_size.width(), dpi,
print_params.desired_dpi);
webkit_print_params->printContentArea.height =
ConvertUnit(print_params.content_size.height(), dpi,
print_params.desired_dpi);
webkit_print_params->printableArea.x =
ConvertUnit(print_params.printable_area.x(), dpi,
print_params.desired_dpi);
webkit_print_params->printableArea.y =
ConvertUnit(print_params.printable_area.y(), dpi,
print_params.desired_dpi);
webkit_print_params->printableArea.width =
ConvertUnit(print_params.printable_area.width(), dpi,
print_params.desired_dpi);
webkit_print_params->printableArea.height =
ConvertUnit(print_params.printable_area.height(),
dpi, print_params.desired_dpi);
webkit_print_params->paperSize.width =
ConvertUnit(print_params.page_size.width(), dpi,
print_params.desired_dpi);
webkit_print_params->paperSize.height =
ConvertUnit(print_params.page_size.height(), dpi,
print_params.desired_dpi);
}
bool PrintingNodeOrPdfFrame(const WebKit::WebFrame* frame,
const WebKit::WebNode& node) {
if (!node.isNull())
return true;
if (!frame->document().isPluginDocument())
return false;
WebKit::WebPlugin* plugin =
frame->document().to<WebKit::WebPluginDocument>().plugin();
return plugin && plugin->supportsPaginatedPrint();
}
bool PrintingFrameHasPageSizeStyle(WebKit::WebFrame* frame,
int total_page_count) {
if (!frame)
return false;
bool frame_has_custom_page_size_style = false;
for (int i = 0; i < total_page_count; ++i) {
if (frame->hasCustomPageSizeStyle(i)) {
frame_has_custom_page_size_style = true;
break;
}
}
return frame_has_custom_page_size_style;
}
printing::MarginType GetMarginsForPdf(WebKit::WebFrame* frame,
const WebKit::WebNode& node) {
if (frame->isPrintScalingDisabledForPlugin(node))
return printing::NO_MARGINS;
else
return printing::PRINTABLE_AREA_MARGINS;
}
bool FitToPageEnabled(const DictionaryValue& job_settings) {
bool fit_to_paper_size = false;
if (!job_settings.GetBoolean(printing::kSettingFitToPageEnabled,
&fit_to_paper_size)) {
NOTREACHED();
}
return fit_to_paper_size;
}
PrintMsg_Print_Params CalculatePrintParamsForCss(
WebKit::WebFrame* frame,
int page_index,
const PrintMsg_Print_Params& page_params,
bool ignore_css_margins,
bool fit_to_page,
double* scale_factor) {
PrintMsg_Print_Params css_params = GetCssPrintParams(frame, page_index,
page_params);
PrintMsg_Print_Params params = page_params;
EnsureOrientationMatches(css_params, ¶ms);
if (ignore_css_margins && fit_to_page)
return params;
PrintMsg_Print_Params result_params = css_params;
if (ignore_css_margins) {
result_params.margin_top = params.margin_top;
result_params.margin_left = params.margin_left;
DCHECK(!fit_to_page);
// Since we are ignoring the margins, the css page size is no longer
// valid.
int default_margin_right = params.page_size.width() -
params.content_size.width() - params.margin_left;
int default_margin_bottom = params.page_size.height() -
params.content_size.height() - params.margin_top;
result_params.content_size = gfx::Size(
result_params.page_size.width() - result_params.margin_left -
default_margin_right,
result_params.page_size.height() - result_params.margin_top -
default_margin_bottom);
}
if (fit_to_page) {
double factor = FitPrintParamsToPage(params, &result_params);
if (scale_factor)
*scale_factor = factor;
}
return result_params;
}
bool IsPrintPreviewEnabled() {
return CommandLine::ForCurrentProcess()->HasSwitch(
switches::kRendererPrintPreview);
}
bool IsPrintThrottlingDisabled() {
return CommandLine::ForCurrentProcess()->HasSwitch(
switches::kDisableScriptedPrintThrottling);
}
} // namespace
// static - Not anonymous so that platform implementations can use it.
void PrintWebViewHelper::PrintHeaderAndFooter(
WebKit::WebCanvas* canvas,
int page_number,
int total_pages,
float webkit_scale_factor,
const printing::PageSizeMargins& page_layout,
const DictionaryValue& header_footer_info,
const PrintMsg_Print_Params& params) {
skia::VectorPlatformDeviceSkia* device =
static_cast<skia::VectorPlatformDeviceSkia*>(canvas->getTopDevice());
device->setDrawingArea(SkPDFDevice::kMargin_DrawingArea);
SkAutoCanvasRestore auto_restore(canvas, true);
canvas->scale(1 / webkit_scale_factor, 1 / webkit_scale_factor);
WebKit::WebSize page_size(page_layout.margin_left + page_layout.margin_right +
page_layout.content_width,
page_layout.margin_top + page_layout.margin_bottom +
page_layout.content_height);
WebKit::WebView* web_view = WebKit::WebView::create(NULL);
web_view->settings()->setJavaScriptEnabled(true);
web_view->initializeMainFrame(NULL);
WebKit::WebFrame* frame = web_view->mainFrame();
base::StringValue html(
ResourceBundle::GetSharedInstance().GetLocalizedString(
IDR_PRINT_PREVIEW_PAGE));
// Load page with script to avoid async operations.
ExecuteScript(frame, kPageLoadScriptFormat, html);
scoped_ptr<base::DictionaryValue> options(header_footer_info.DeepCopy());
options->SetDouble("width", page_size.width);
options->SetDouble("height", page_size.height);
options->SetDouble("topMargin", page_layout.margin_top);
options->SetDouble("bottomMargin", page_layout.margin_bottom);
options->SetString("pageNumber",
StringPrintf("%d/%d", page_number, total_pages));
ExecuteScript(frame, kPageSetupScriptFormat, *options);
WebKit::WebPrintParams webkit_params(page_size);
webkit_params.printerDPI = GetDPI(¶ms);
frame->printBegin(webkit_params, WebKit::WebNode(), NULL);
frame->printPage(0, canvas);
frame->printEnd();
web_view->close();
device->setDrawingArea(SkPDFDevice::kContent_DrawingArea);
}
// static - Not anonymous so that platform implementations can use it.
float PrintWebViewHelper::RenderPageContent(WebKit::WebFrame* frame,
int page_number,
const gfx::Rect& canvas_area,
const gfx::Rect& content_area,
double scale_factor,
WebKit::WebCanvas* canvas) {
SkAutoCanvasRestore auto_restore(canvas, true);
if (content_area != canvas_area) {
canvas->translate((content_area.x() - canvas_area.x()) / scale_factor,
(content_area.y() - canvas_area.y()) / scale_factor);
SkRect clip_rect(
SkRect::MakeXYWH(content_area.origin().x() / scale_factor,
content_area.origin().y() / scale_factor,
content_area.size().width() / scale_factor,
content_area.size().height() / scale_factor));
SkIRect clip_int_rect;
clip_rect.roundOut(&clip_int_rect);
SkRegion clip_region(clip_int_rect);
canvas->setClipRegion(clip_region);
}
return frame->printPage(page_number, canvas);
}
PrepareFrameAndViewForPrint::PrepareFrameAndViewForPrint(
const PrintMsg_Print_Params& print_params,
WebKit::WebFrame* frame,
const WebKit::WebNode& node)
: frame_(frame),
node_to_print_(node),
web_view_(frame->view()),
expected_pages_count_(0),
use_browser_overlays_(true),
finished_(false),
should_print_backgrounds_(print_params.should_print_backgrounds) {
WebKit::WebPrintParams webkit_print_params;
ComputeWebKitPrintParamsInDesiredDpi(print_params, &webkit_print_params);
if (WebKit::WebFrame* web_frame = web_view_->mainFrame())
prev_scroll_offset_ = web_frame->scrollOffset();
prev_view_size_ = web_view_->size();
StartPrinting(webkit_print_params);
}
PrepareFrameAndViewForPrint::~PrepareFrameAndViewForPrint() {
FinishPrinting();
}
void PrepareFrameAndViewForPrint::UpdatePrintParams(
const PrintMsg_Print_Params& print_params) {
DCHECK(!finished_);
WebKit::WebPrintParams webkit_print_params;
ComputeWebKitPrintParamsInDesiredDpi(print_params, &webkit_print_params);
should_print_backgrounds_ = print_params.should_print_backgrounds;
if (webkit_print_params.printContentArea ==
web_print_params_.printContentArea &&
webkit_print_params.printableArea == web_print_params_.printableArea &&
webkit_print_params.paperSize == web_print_params_.paperSize &&
webkit_print_params.printScalingOption ==
web_print_params_.printScalingOption) {
return;
}
frame_->printEnd();
StartPrinting(webkit_print_params);
}
gfx::Size PrepareFrameAndViewForPrint::GetPrintCanvasSize() const {
return gfx::Size(web_print_params_.printContentArea.width,
web_print_params_.printContentArea.height);
}
void PrepareFrameAndViewForPrint::StartPrinting(
const WebKit::WebPrintParams& webkit_print_params) {
web_print_params_ = webkit_print_params;
// Layout page according to printer page size. Since WebKit shrinks the
// size of the page automatically (from 125% to 200%) we trick it to
// think the page is 125% larger so the size of the page is correct for
// minimum (default) scaling.
// This is important for sites that try to fill the page.
gfx::Size print_layout_size(web_print_params_.printContentArea.width,
web_print_params_.printContentArea.height);
print_layout_size.set_height(static_cast<int>(
static_cast<double>(print_layout_size.height()) * 1.25));
web_view_->resize(print_layout_size);
expected_pages_count_ = frame_->printBegin(web_print_params_,
node_to_print_,
&use_browser_overlays_);
web_view_->settings()->setShouldPrintBackgrounds(should_print_backgrounds_);
}
void PrepareFrameAndViewForPrint::FinishPrinting() {
if (!finished_) {
finished_ = true;
frame_->printEnd();
web_view_->resize(prev_view_size_);
if (WebKit::WebFrame* web_frame = web_view_->mainFrame())
web_frame->setScrollOffset(prev_scroll_offset_);
web_view_->settings()->setShouldPrintBackgrounds(false);
}
}
PrintWebViewHelper::PrintWebViewHelper(content::RenderView* render_view)
: content::RenderViewObserver(render_view),
content::RenderViewObserverTracker<PrintWebViewHelper>(render_view),
print_web_view_(NULL),
is_preview_enabled_(IsPrintPreviewEnabled()),
is_scripted_print_throttling_disabled_(IsPrintThrottlingDisabled()),
is_print_ready_metafile_sent_(false),
ignore_css_margins_(false),
user_cancelled_scripted_print_count_(0),
is_scripted_printing_blocked_(false),
notify_browser_of_print_failure_(true),
print_for_preview_(false),
print_node_in_progress_(false) {
}
PrintWebViewHelper::~PrintWebViewHelper() {}
bool PrintWebViewHelper::IsScriptInitiatedPrintAllowed(
WebKit::WebFrame* frame, bool user_initiated) {
if (is_scripted_printing_blocked_)
return false;
// If preview is enabled, then the print dialog is tab modal, and the user
// can always close the tab on a mis-behaving page (the system print dialog
// is app modal). If the print was initiated through user action, don't
// throttle. Or, if the command line flag to skip throttling has been set.
if (!is_scripted_print_throttling_disabled_ &&
!is_preview_enabled_ &&
!user_initiated)
return !IsScriptInitiatedPrintTooFrequent(frame);
return true;
}
// Prints |frame| which called window.print().
void PrintWebViewHelper::PrintPage(WebKit::WebFrame* frame,
bool user_initiated) {
DCHECK(frame);
// Allow Prerendering to cancel this print request if necessary.
if (prerender::PrerenderHelper::IsPrerendering(render_view())) {
Send(new ChromeViewHostMsg_CancelPrerenderForPrinting(routing_id()));
return;
}
if (!IsScriptInitiatedPrintAllowed(frame, user_initiated))
return;
IncrementScriptedPrintCount();
if (is_preview_enabled_) {
print_preview_context_.InitWithFrame(frame);
RequestPrintPreview(PRINT_PREVIEW_SCRIPTED);
} else {
Print(frame, WebKit::WebNode());
}
}
bool PrintWebViewHelper::OnMessageReceived(const IPC::Message& message) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(PrintWebViewHelper, message)
IPC_MESSAGE_HANDLER(PrintMsg_PrintPages, OnPrintPages)
IPC_MESSAGE_HANDLER(PrintMsg_PrintForSystemDialog, OnPrintForSystemDialog)
IPC_MESSAGE_HANDLER(PrintMsg_InitiatePrintPreview, OnInitiatePrintPreview)
IPC_MESSAGE_HANDLER(PrintMsg_PrintNodeUnderContextMenu,
OnPrintNodeUnderContextMenu)
IPC_MESSAGE_HANDLER(PrintMsg_PrintPreview, OnPrintPreview)
IPC_MESSAGE_HANDLER(PrintMsg_PrintForPrintPreview, OnPrintForPrintPreview)
IPC_MESSAGE_HANDLER(PrintMsg_PrintingDone, OnPrintingDone)
IPC_MESSAGE_HANDLER(PrintMsg_ResetScriptedPrintCount,
ResetScriptedPrintCount)
IPC_MESSAGE_HANDLER(PrintMsg_SetScriptedPrintingBlocked,
SetScriptedPrintBlocked)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
void PrintWebViewHelper::OnPrintForPrintPreview(
const DictionaryValue& job_settings) {
DCHECK(is_preview_enabled_);
// If still not finished with earlier print request simply ignore.
if (print_web_view_)
return;
if (!render_view()->GetWebView())
return;
WebKit::WebFrame* main_frame = render_view()->GetWebView()->mainFrame();
if (!main_frame)
return;
WebKit::WebDocument document = main_frame->document();
// <object> with id="pdf-viewer" is created in
// chrome/browser/resources/print_preview/print_preview.js
WebKit::WebElement pdf_element = document.getElementById("pdf-viewer");
if (pdf_element.isNull()) {
NOTREACHED();
return;
}
// Set |print_for_preview_| flag and autoreset it to back to original
// on return.
base::AutoReset<bool> set_printing_flag(&print_for_preview_, true);
WebKit::WebFrame* pdf_frame = pdf_element.document().frame();
if (!UpdatePrintSettings(pdf_frame, pdf_element, job_settings)) {
LOG(ERROR) << "UpdatePrintSettings failed";
DidFinishPrinting(FAIL_PRINT);
return;
}
// Print page onto entire page not just printable area. Preview PDF already
// has content in correct position taking into account page size and printable
// area.
// TODO(vitalybuka) : Make this consistent on all platform. This change
// affects Windows only. On Linux and OSX RenderPagesForPrint does not use
// printable_area. Also we can't change printable_area deeper inside
// RenderPagesForPrint for Windows, because it's used also by native
// printing and it expects real printable_area value.
// See http://crbug.com/123408
PrintMsg_Print_Params& print_params = print_pages_params_->params;
print_params.printable_area = gfx::Rect(print_params.page_size);
// Render Pages for printing.
if (!RenderPagesForPrint(pdf_frame, pdf_element)) {
LOG(ERROR) << "RenderPagesForPrint failed";
DidFinishPrinting(FAIL_PRINT);
}
}
bool PrintWebViewHelper::GetPrintFrame(WebKit::WebFrame** frame) {
DCHECK(frame);
DCHECK(render_view()->GetWebView());
if (!render_view()->GetWebView())
return false;
// If the user has selected text in the currently focused frame we print
// only that frame (this makes print selection work for multiple frames).
*frame = render_view()->GetWebView()->focusedFrame()->hasSelection() ?
render_view()->GetWebView()->focusedFrame() :
render_view()->GetWebView()->mainFrame();
return true;
}
void PrintWebViewHelper::OnPrintPages() {
WebKit::WebFrame* frame;
if (GetPrintFrame(&frame))
Print(frame, WebKit::WebNode());
}
void PrintWebViewHelper::OnPrintForSystemDialog() {
WebKit::WebFrame* frame = print_preview_context_.frame();
if (!frame) {
NOTREACHED();
return;
}
Print(frame, print_preview_context_.node());
}
void PrintWebViewHelper::GetPageSizeAndContentAreaFromPageLayout(
const printing::PageSizeMargins& page_layout_in_points,
gfx::Size* page_size,
gfx::Rect* content_area) {
*page_size = gfx::Size(
page_layout_in_points.content_width +
page_layout_in_points.margin_right +
page_layout_in_points.margin_left,
page_layout_in_points.content_height +
page_layout_in_points.margin_top +
page_layout_in_points.margin_bottom);
*content_area = gfx::Rect(page_layout_in_points.margin_left,
page_layout_in_points.margin_top,
page_layout_in_points.content_width,
page_layout_in_points.content_height);
}
void PrintWebViewHelper::UpdateFrameMarginsCssInfo(
const DictionaryValue& settings) {
int margins_type = 0;
if (!settings.GetInteger(printing::kSettingMarginsType, &margins_type))
margins_type = printing::DEFAULT_MARGINS;
ignore_css_margins_ = (margins_type != printing::DEFAULT_MARGINS);
}
bool PrintWebViewHelper::IsPrintToPdfRequested(
const DictionaryValue& job_settings) {
bool print_to_pdf = false;
if (!job_settings.GetBoolean(printing::kSettingPrintToPDF, &print_to_pdf))
NOTREACHED();
return print_to_pdf;
}
WebKit::WebPrintScalingOption PrintWebViewHelper::GetPrintScalingOption(
bool source_is_html, const DictionaryValue& job_settings,
const PrintMsg_Print_Params& params) {
DCHECK(!print_for_preview_);
if (params.print_to_pdf)
return WebKit::WebPrintScalingOptionSourceSize;
if (!source_is_html) {
if (!FitToPageEnabled(job_settings))
return WebKit::WebPrintScalingOptionNone;
bool no_plugin_scaling =
print_preview_context_.frame()->isPrintScalingDisabledForPlugin(
print_preview_context_.node());
if (params.is_first_request && no_plugin_scaling)
return WebKit::WebPrintScalingOptionNone;
}
return WebKit::WebPrintScalingOptionFitToPrintableArea;
}
void PrintWebViewHelper::OnPrintPreview(const DictionaryValue& settings) {
DCHECK(is_preview_enabled_);
print_preview_context_.OnPrintPreview();
if (!UpdatePrintSettings(print_preview_context_.frame(),
print_preview_context_.node(), settings)) {
if (print_preview_context_.last_error() != PREVIEW_ERROR_BAD_SETTING) {
Send(new PrintHostMsg_PrintPreviewInvalidPrinterSettings(
routing_id(), print_pages_params_->params.document_cookie));
notify_browser_of_print_failure_ = false; // Already sent.
}
DidFinishPrinting(FAIL_PREVIEW);
return;
}
if (!print_pages_params_->params.is_first_request &&
old_print_pages_params_.get() &&
PrintMsg_Print_Params_IsEqual(*old_print_pages_params_,
*print_pages_params_)) {
PrintHostMsg_DidPreviewDocument_Params preview_params;
preview_params.reuse_existing_data = true;
preview_params.data_size = 0;
preview_params.document_cookie =
print_pages_params_->params.document_cookie;
preview_params.expected_pages_count =
print_preview_context_.total_page_count();
preview_params.modifiable = print_preview_context_.IsModifiable();
preview_params.preview_request_id =
print_pages_params_->params.preview_request_id;
Send(new PrintHostMsg_MetafileReadyForPrinting(routing_id(),
preview_params));
return;
}
// If we are previewing a pdf and the print scaling is disabled, send a
// message to browser.
if (print_pages_params_->params.is_first_request &&
!print_preview_context_.IsModifiable() &&
print_preview_context_.frame()->isPrintScalingDisabledForPlugin(
print_preview_context_.node())) {
Send(new PrintHostMsg_PrintPreviewScalingDisabled(routing_id()));
}
// Always clear |old_print_pages_params_| before rendering the pages.
old_print_pages_params_.reset();
is_print_ready_metafile_sent_ = false;
// PDF printer device supports alpha blending.
print_pages_params_->params.supports_alpha_blend = true;
bool generate_draft_pages = false;
if (!settings.GetBoolean(printing::kSettingGenerateDraftData,
&generate_draft_pages)) {
NOTREACHED();
}
print_preview_context_.set_generate_draft_pages(generate_draft_pages);
if (CreatePreviewDocument()) {
DidFinishPrinting(OK);
} else {
if (notify_browser_of_print_failure_)
LOG(ERROR) << "CreatePreviewDocument failed";
DidFinishPrinting(FAIL_PREVIEW);
}
}
bool PrintWebViewHelper::CreatePreviewDocument() {
const PrintMsg_Print_Params& print_params = print_pages_params_->params;
const std::vector<int>& pages = print_pages_params_->pages;
if (!print_preview_context_.CreatePreviewDocument(print_params, pages,
ignore_css_margins_)) {
return false;
}
printing::PageSizeMargins default_page_layout;
ComputePageLayoutInPointsForCss(print_preview_context_.frame(), 0,
print_params, ignore_css_margins_, NULL,
&default_page_layout);
if (!old_print_pages_params_.get() ||
!PageLayoutIsEqual(*old_print_pages_params_, *print_pages_params_)) {
bool has_page_size_style = PrintingFrameHasPageSizeStyle(
print_preview_context_.frame(),
print_preview_context_.total_page_count());
int dpi = GetDPI(&print_params);
using printing::ConvertUnit;
using printing::kPointsPerInch;
gfx::Rect printable_area_in_points(
ConvertUnit(print_params.printable_area.x(), dpi, kPointsPerInch),
ConvertUnit(print_params.printable_area.y(), dpi, kPointsPerInch),
ConvertUnit(print_params.printable_area.width(), dpi, kPointsPerInch),
ConvertUnit(print_params.printable_area.height(), dpi, kPointsPerInch));
// Margins: Send default page layout to browser process.
Send(new PrintHostMsg_DidGetDefaultPageLayout(routing_id(),
default_page_layout,
printable_area_in_points,
has_page_size_style));
}
PrintHostMsg_DidGetPreviewPageCount_Params params;
params.page_count = print_preview_context_.total_page_count();
params.is_modifiable = print_preview_context_.IsModifiable();
params.document_cookie = print_params.document_cookie;
params.preview_request_id = print_params.preview_request_id;
params.clear_preview_data = print_preview_context_.generate_draft_pages();
Send(new PrintHostMsg_DidGetPreviewPageCount(routing_id(), params));
if (CheckForCancel())
return false;
while (!print_preview_context_.IsFinalPageRendered()) {
int page_number = print_preview_context_.GetNextPageNumber();
DCHECK_GE(page_number, 0);
if (!RenderPreviewPage(page_number, print_params))
return false;
if (CheckForCancel())
return false;
// We must call PrepareFrameAndViewForPrint::FinishPrinting() (by way of
// print_preview_context_.AllPagesRendered()) before calling
// FinalizePrintReadyDocument() when printing a PDF because the plugin
// code does not generate output until we call FinishPrinting(). We do not
// generate draft pages for PDFs, so IsFinalPageRendered() and
// IsLastPageOfPrintReadyMetafile() will be true in the same iteration of
// the loop.
if (print_preview_context_.IsFinalPageRendered())
print_preview_context_.AllPagesRendered();
if (print_preview_context_.IsLastPageOfPrintReadyMetafile()) {
DCHECK(print_preview_context_.IsModifiable() ||
print_preview_context_.IsFinalPageRendered());
if (!FinalizePrintReadyDocument())
return false;
}
}
print_preview_context_.Finished();
return true;
}
bool PrintWebViewHelper::FinalizePrintReadyDocument() {
DCHECK(!is_print_ready_metafile_sent_);
print_preview_context_.FinalizePrintReadyDocument();
// Get the size of the resulting metafile.
printing::PreviewMetafile* metafile = print_preview_context_.metafile();
uint32 buf_size = metafile->GetDataSize();
DCHECK_GT(buf_size, 0u);
PrintHostMsg_DidPreviewDocument_Params preview_params;
preview_params.reuse_existing_data = false;
preview_params.data_size = buf_size;
preview_params.document_cookie = print_pages_params_->params.document_cookie;
preview_params.expected_pages_count =
print_preview_context_.total_page_count();
preview_params.modifiable = print_preview_context_.IsModifiable();
preview_params.preview_request_id =
print_pages_params_->params.preview_request_id;
// Ask the browser to create the shared memory for us.
if (!CopyMetafileDataToSharedMem(metafile,
&(preview_params.metafile_data_handle))) {
LOG(ERROR) << "CopyMetafileDataToSharedMem failed";
print_preview_context_.set_error(PREVIEW_ERROR_METAFILE_COPY_FAILED);
return false;
}
is_print_ready_metafile_sent_ = true;
Send(new PrintHostMsg_MetafileReadyForPrinting(routing_id(), preview_params));
return true;
}
void PrintWebViewHelper::OnPrintingDone(bool success) {
notify_browser_of_print_failure_ = false;
if (!success)
LOG(ERROR) << "Failure in OnPrintingDone";
DidFinishPrinting(success ? OK : FAIL_PRINT);
}
void PrintWebViewHelper::SetScriptedPrintBlocked(bool blocked) {
is_scripted_printing_blocked_ = blocked;
}
void PrintWebViewHelper::OnPrintNodeUnderContextMenu() {
PrintNode(render_view()->GetContextMenuNode());
}
void PrintWebViewHelper::OnInitiatePrintPreview() {
DCHECK(is_preview_enabled_);
WebKit::WebFrame* frame;
if (GetPrintFrame(&frame)) {
print_preview_context_.InitWithFrame(frame);
RequestPrintPreview(PRINT_PREVIEW_USER_INITIATED_ENTIRE_FRAME);
} else {
// This should not happen. Let's add a CHECK here to see how often this
// gets hit.
// TODO(thestig) Remove this later when we have sufficient usage of this
// code on the M19 stable channel.
CHECK(false);
}
}
void PrintWebViewHelper::PrintNode(const WebKit::WebNode& node) {
if (node.isNull() || !node.document().frame()) {
// This can occur when the context menu refers to an invalid WebNode.
// See http://crbug.com/100890#c17 for a repro case.
return;
}
if (print_node_in_progress_) {
// This can happen as a result of processing sync messages when printing
// from ppapi plugins. It's a rare case, so its OK to just fail here.
// See http://crbug.com/159165.
return;
}
print_node_in_progress_ = true;
// Make a copy of the node, in case RenderView::OnContextMenuClosed resets
// its |context_menu_node_|.
if (is_preview_enabled_) {
print_preview_context_.InitWithNode(node);
RequestPrintPreview(PRINT_PREVIEW_USER_INITIATED_CONTEXT_NODE);
} else {
WebKit::WebNode duplicate_node(node);
Print(duplicate_node.document().frame(), duplicate_node);
}
print_node_in_progress_ = false;
}
void PrintWebViewHelper::Print(WebKit::WebFrame* frame,
const WebKit::WebNode& node) {
// If still not finished with earlier print request simply ignore.
if (print_web_view_)
return;
// Initialize print settings.
scoped_ptr<PrepareFrameAndViewForPrint> prepare;
if (!InitPrintSettingsAndPrepareFrame(frame, node, &prepare)) {
DidFinishPrinting(FAIL_PRINT_INIT);
return; // Failed to init print page settings.
}
int expected_page_count = 0;
bool use_browser_overlays = true;
expected_page_count = prepare->GetExpectedPageCount();
if (expected_page_count)
use_browser_overlays = prepare->ShouldUseBrowserOverlays();
// Release the prepare before going any further, since we are going to
// show UI and wait for the user.
prepare.reset();
// Some full screen plugins can say they don't want to print.
if (!expected_page_count) {
DidFinishPrinting(FAIL_PRINT);
return;
}
// Ask the browser to show UI to retrieve the final print settings.
if (!GetPrintSettingsFromUser(frame, node, expected_page_count,
use_browser_overlays)) {
DidFinishPrinting(OK); // Release resources and fail silently.
return;
}
// Render Pages for printing.
if (!RenderPagesForPrint(frame, node)) {
LOG(ERROR) << "RenderPagesForPrint failed";
DidFinishPrinting(FAIL_PRINT);
}
ResetScriptedPrintCount();
}
void PrintWebViewHelper::DidFinishPrinting(PrintingResult result) {
bool store_print_pages_params = true;
switch (result) {
case OK:
break;
case FAIL_PRINT_INIT:
DCHECK(!notify_browser_of_print_failure_);
break;
case FAIL_PRINT:
if (notify_browser_of_print_failure_ && print_pages_params_.get()) {
int cookie = print_pages_params_->params.document_cookie;
Send(new PrintHostMsg_PrintingFailed(routing_id(), cookie));
}
break;
case FAIL_PREVIEW:
DCHECK(is_preview_enabled_);
store_print_pages_params = false;
int cookie = print_pages_params_.get() ?
print_pages_params_->params.document_cookie : 0;
if (notify_browser_of_print_failure_)
Send(new PrintHostMsg_PrintPreviewFailed(routing_id(), cookie));
else
Send(new PrintHostMsg_PrintPreviewCancelled(routing_id(), cookie));
print_preview_context_.Failed(notify_browser_of_print_failure_);
break;
}
if (print_web_view_) {
print_web_view_->close();
print_web_view_ = NULL;
}
if (store_print_pages_params) {
old_print_pages_params_.reset(print_pages_params_.release());
} else {
print_pages_params_.reset();
old_print_pages_params_.reset();
}
notify_browser_of_print_failure_ = true;
}
bool PrintWebViewHelper::CopyAndPrint(WebKit::WebFrame* web_frame) {
// Create a new WebView with the same settings as the current display one.
// Except that we disable javascript (don't want any active content running
// on the page).
webkit_glue::WebPreferences prefs = render_view()->GetWebkitPreferences();
prefs.javascript_enabled = false;
prefs.java_enabled = false;
print_web_view_ = WebKit::WebView::create(this);
prefs.Apply(print_web_view_);
print_web_view_->initializeMainFrame(this);
print_pages_params_->pages.clear(); // Print all pages of selection.
std::string html = web_frame->selectionAsMarkup().utf8();
std::string url_str = "data:text/html;charset=utf-8,";
url_str.append(html);
GURL url(url_str);
// When loading is done this will call didStopLoading() and that will do the
// actual printing.
print_web_view_->mainFrame()->loadRequest(WebKit::WebURLRequest(url));
return true;
}
#if defined(OS_MACOSX) || defined(OS_WIN)
bool PrintWebViewHelper::PrintPages(WebKit::WebFrame* frame,
const WebKit::WebNode& node) {
const PrintMsg_PrintPages_Params& params = *print_pages_params_;
const PrintMsg_Print_Params& print_params = params.params;
PrepareFrameAndViewForPrint prep_frame_view(print_params, frame, node);
UpdateFrameAndViewFromCssPageLayout(frame, node, &prep_frame_view,
print_params, ignore_css_margins_);
int page_count = prep_frame_view.GetExpectedPageCount();
if (!page_count)
return false;
// TODO(vitalybuka): should be page_count or valid pages from params.pages.
// See http://crbug.com/161576
Send(new PrintHostMsg_DidGetPrintedPagesCount(routing_id(),
print_params.document_cookie,
page_count));
const gfx::Size& canvas_size = prep_frame_view.GetPrintCanvasSize();
PrintMsg_PrintPage_Params page_params;
page_params.params = print_params;
if (params.pages.empty()) {
for (int i = 0; i < page_count; ++i) {
page_params.page_number = i;
PrintPageInternal(page_params, canvas_size, frame);
}
} else {
for (size_t i = 0; i < params.pages.size(); ++i) {
if (params.pages[i] >= page_count)
break;
page_params.page_number = params.pages[i];
PrintPageInternal(page_params, canvas_size, frame);
}
}
return true;
}
#endif // OS_MACOSX || OS_WIN
void PrintWebViewHelper::didStopLoading() {
PrintPages(print_web_view_->mainFrame(), WebKit::WebNode());
}
// static - Not anonymous so that platform implementations can use it.
void PrintWebViewHelper::ComputePageLayoutInPointsForCss(
WebKit::WebFrame* frame,
int page_index,
const PrintMsg_Print_Params& page_params,
bool ignore_css_margins,
double* scale_factor,
printing::PageSizeMargins* page_layout_in_points) {
PrintMsg_Print_Params params = CalculatePrintParamsForCss(
frame, page_index, page_params, ignore_css_margins,
page_params.print_scaling_option ==
WebKit::WebPrintScalingOptionFitToPrintableArea,
scale_factor);
CalculatePageLayoutFromPrintParams(params, page_layout_in_points);
}
// static - Not anonymous so that platform implementations can use it.
void PrintWebViewHelper::UpdateFrameAndViewFromCssPageLayout(
WebKit::WebFrame* frame,
const WebKit::WebNode& node,
PrepareFrameAndViewForPrint* prepare,
const PrintMsg_Print_Params& params,
bool ignore_css_margins) {
if (PrintingNodeOrPdfFrame(frame, node))
return;
bool fit_to_page = ignore_css_margins &&
params.print_scaling_option ==
WebKit::WebPrintScalingOptionFitToPrintableArea;
PrintMsg_Print_Params print_params = CalculatePrintParamsForCss(
frame, 0, params, ignore_css_margins, fit_to_page, NULL);
prepare->UpdatePrintParams(print_params);
}
bool PrintWebViewHelper::InitPrintSettings(bool fit_to_paper_size) {
PrintMsg_PrintPages_Params settings;
Send(new PrintHostMsg_GetDefaultPrintSettings(routing_id(),
&settings.params));
// Check if the printer returned any settings, if the settings is empty, we
// can safely assume there are no printer drivers configured. So we safely
// terminate.
bool result = true;
if (!PrintMsg_Print_Params_IsValid(settings.params))
result = false;
if (result &&
(settings.params.dpi < kMinDpi || settings.params.document_cookie == 0)) {
// Invalid print page settings.
NOTREACHED();
result = false;
}
// Reset to default values.
ignore_css_margins_ = false;
settings.pages.clear();
settings.params.print_scaling_option =
WebKit::WebPrintScalingOptionSourceSize;
if (fit_to_paper_size) {
settings.params.print_scaling_option =
WebKit::WebPrintScalingOptionFitToPrintableArea;
}
print_pages_params_.reset(new PrintMsg_PrintPages_Params(settings));
return result;
}
bool PrintWebViewHelper::InitPrintSettingsAndPrepareFrame(
WebKit::WebFrame* frame,
const WebKit::WebNode& node,
scoped_ptr<PrepareFrameAndViewForPrint>* prepare) {
DCHECK(frame);
bool fit_to_paper_size = !(PrintingNodeOrPdfFrame(frame, node));
if (!InitPrintSettings(fit_to_paper_size)) {
notify_browser_of_print_failure_ = false;
render_view()->RunModalAlertDialog(
frame,
l10n_util::GetStringUTF16(IDS_PRINT_PREVIEW_INVALID_PRINTER_SETTINGS));
return false;
}
DCHECK(!prepare->get());
prepare->reset(new PrepareFrameAndViewForPrint(print_pages_params_->params,
frame, node));
UpdateFrameAndViewFromCssPageLayout(frame, node, prepare->get(),
print_pages_params_->params,
ignore_css_margins_);
Send(new PrintHostMsg_DidGetDocumentCookie(
routing_id(), print_pages_params_->params.document_cookie));
return true;
}
bool PrintWebViewHelper::UpdatePrintSettings(
WebKit::WebFrame* frame,
const WebKit::WebNode& node,
const DictionaryValue& passed_job_settings) {
DCHECK(is_preview_enabled_);
const DictionaryValue* job_settings = &passed_job_settings;
DictionaryValue modified_job_settings;
if (job_settings->empty()) {
if (!print_for_preview_)
print_preview_context_.set_error(PREVIEW_ERROR_BAD_SETTING);
return false;
}
bool source_is_html = true;
if (print_for_preview_) {
if (!job_settings->GetBoolean(printing::kSettingPreviewModifiable,
&source_is_html)) {
NOTREACHED();
}
} else {
source_is_html = !PrintingNodeOrPdfFrame(frame, node);
}
if (print_for_preview_ || !source_is_html) {
modified_job_settings.MergeDictionary(job_settings);
modified_job_settings.SetBoolean(printing::kSettingHeaderFooterEnabled,
false);
modified_job_settings.SetInteger(printing::kSettingMarginsType,
printing::NO_MARGINS);
job_settings = &modified_job_settings;
}
// Send the cookie so that UpdatePrintSettings can reuse PrinterQuery when
// possible.
int cookie = print_pages_params_.get() ?
print_pages_params_->params.document_cookie : 0;
PrintMsg_PrintPages_Params settings;
Send(new PrintHostMsg_UpdatePrintSettings(routing_id(),
cookie, *job_settings, &settings));
print_pages_params_.reset(new PrintMsg_PrintPages_Params(settings));
if (!PrintMsg_Print_Params_IsValid(settings.params)) {
if (!print_for_preview_) {
print_preview_context_.set_error(PREVIEW_ERROR_INVALID_PRINTER_SETTINGS);
} else {
// PrintForPrintPreview
WebKit::WebFrame* print_frame = NULL;
// This may not be the right frame, but the alert will be modal,
// therefore it works well enough.
GetPrintFrame(&print_frame);
if (print_frame) {
render_view()->RunModalAlertDialog(
print_frame,
l10n_util::GetStringUTF16(
IDS_PRINT_PREVIEW_INVALID_PRINTER_SETTINGS));
}
}
return false;
}
if (settings.params.dpi < kMinDpi || !settings.params.document_cookie) {
print_preview_context_.set_error(PREVIEW_ERROR_UPDATING_PRINT_SETTINGS);
return false;
}
if (!print_for_preview_) {
// Validate expected print preview settings.
if (!job_settings->GetInteger(printing::kPreviewUIID,
&(settings.params.preview_ui_id)) ||
!job_settings->GetInteger(printing::kPreviewRequestID,
&(settings.params.preview_request_id)) ||
!job_settings->GetBoolean(printing::kIsFirstRequest,
&(settings.params.is_first_request))) {
NOTREACHED();
print_preview_context_.set_error(PREVIEW_ERROR_BAD_SETTING);
return false;
}
settings.params.print_to_pdf = IsPrintToPdfRequested(*job_settings);
UpdateFrameMarginsCssInfo(*job_settings);
settings.params.print_scaling_option = GetPrintScalingOption(
source_is_html, *job_settings, settings.params);
// Header/Footer: Set |header_footer_info_|.
if (settings.params.display_header_footer) {
header_footer_info_.reset(new DictionaryValue());
header_footer_info_->SetString(printing::kSettingHeaderFooterDate,
settings.params.date);
header_footer_info_->SetString(printing::kSettingHeaderFooterURL,
settings.params.url);
header_footer_info_->SetString(printing::kSettingHeaderFooterTitle,
settings.params.title);
}
}
print_pages_params_.reset(new PrintMsg_PrintPages_Params(settings));
Send(new PrintHostMsg_DidGetDocumentCookie(routing_id(),
settings.params.document_cookie));
return true;
}
bool PrintWebViewHelper::GetPrintSettingsFromUser(WebKit::WebFrame* frame,
const WebKit::WebNode& node,
int expected_pages_count,
bool use_browser_overlays) {
PrintHostMsg_ScriptedPrint_Params params;
PrintMsg_PrintPages_Params print_settings;
params.cookie = print_pages_params_->params.document_cookie;
params.has_selection = frame->hasSelection();
params.expected_pages_count = expected_pages_count;
printing::MarginType margin_type = printing::DEFAULT_MARGINS;
if (PrintingNodeOrPdfFrame(frame, node))
margin_type = GetMarginsForPdf(frame, node);
params.margin_type = margin_type;
Send(new PrintHostMsg_DidShowPrintDialog(routing_id()));
// PrintHostMsg_ScriptedPrint will reset print_scaling_option, so we save the
// value before and restore it afterwards.
WebKit::WebPrintScalingOption scaling_option =
print_pages_params_->params.print_scaling_option;
print_pages_params_.reset();
IPC::SyncMessage* msg =
new PrintHostMsg_ScriptedPrint(routing_id(), params, &print_settings);
msg->EnableMessagePumping();
Send(msg);
print_pages_params_.reset(new PrintMsg_PrintPages_Params(print_settings));
print_pages_params_->params.print_scaling_option = scaling_option;
return (print_settings.params.dpi && print_settings.params.document_cookie);
}
bool PrintWebViewHelper::RenderPagesForPrint(
WebKit::WebFrame* frame,
const WebKit::WebNode& node) {
if (print_pages_params_->params.selection_only)
return CopyAndPrint(frame);
return PrintPages(frame, node);
}
#if defined(OS_POSIX)
bool PrintWebViewHelper::CopyMetafileDataToSharedMem(
printing::Metafile* metafile,
base::SharedMemoryHandle* shared_mem_handle) {
uint32 buf_size = metafile->GetDataSize();
scoped_ptr<base::SharedMemory> shared_buf(
content::RenderThread::Get()->HostAllocateSharedMemoryBuffer(
buf_size).release());
if (shared_buf.get()) {
if (shared_buf->Map(buf_size)) {
metafile->GetData(shared_buf->memory(), buf_size);
shared_buf->GiveToProcess(base::GetCurrentProcessHandle(),
shared_mem_handle);
return true;
}
}
NOTREACHED();
return false;
}
#endif // defined(OS_POSIX)
bool PrintWebViewHelper::IsScriptInitiatedPrintTooFrequent(
WebKit::WebFrame* frame) {
const int kMinSecondsToIgnoreJavascriptInitiatedPrint = 2;
const int kMaxSecondsToIgnoreJavascriptInitiatedPrint = 32;
bool too_frequent = false;
// Check if there is script repeatedly trying to print and ignore it if too
// frequent. The first 3 times, we use a constant wait time, but if this
// gets excessive, we switch to exponential wait time. So for a page that
// calls print() in a loop the user will need to cancel the print dialog
// after: [2, 2, 2, 4, 8, 16, 32, 32, ...] seconds.
// This gives the user time to navigate from the page.
if (user_cancelled_scripted_print_count_ > 0) {
base::TimeDelta diff = base::Time::Now() - last_cancelled_script_print_;
int min_wait_seconds = kMinSecondsToIgnoreJavascriptInitiatedPrint;
if (user_cancelled_scripted_print_count_ > 3) {
min_wait_seconds = std::min(
kMinSecondsToIgnoreJavascriptInitiatedPrint <<
(user_cancelled_scripted_print_count_ - 3),
kMaxSecondsToIgnoreJavascriptInitiatedPrint);
}
if (diff.InSeconds() < min_wait_seconds) {
too_frequent = true;
}
}
if (!too_frequent)
return false;
WebKit::WebString message(
WebKit::WebString::fromUTF8("Ignoring too frequent calls to print()."));
frame->addMessageToConsole(
WebKit::WebConsoleMessage(
WebKit::WebConsoleMessage::LevelWarning, message));
return true;
}
void PrintWebViewHelper::ResetScriptedPrintCount() {
// Reset cancel counter on successful print.
user_cancelled_scripted_print_count_ = 0;
}
void PrintWebViewHelper::IncrementScriptedPrintCount() {
++user_cancelled_scripted_print_count_;
last_cancelled_script_print_ = base::Time::Now();
}
void PrintWebViewHelper::RequestPrintPreview(PrintPreviewRequestType type) {
const bool is_modifiable = print_preview_context_.IsModifiable();
old_print_pages_params_.reset();
switch (type) {
case PRINT_PREVIEW_USER_INITIATED_ENTIRE_FRAME: {
Send(new PrintHostMsg_RequestPrintPreview(routing_id(), is_modifiable,
false));
break;
}
case PRINT_PREVIEW_USER_INITIATED_CONTEXT_NODE: {
Send(new PrintHostMsg_RequestPrintPreview(routing_id(), is_modifiable,
true));
break;
}
case PRINT_PREVIEW_SCRIPTED: {
IPC::SyncMessage* msg =
new PrintHostMsg_ScriptedPrintPreview(routing_id(), is_modifiable);
msg->EnableMessagePumping();
Send(msg);
break;
}
default: {
NOTREACHED();
return;
}
}
}
bool PrintWebViewHelper::CheckForCancel() {
const PrintMsg_Print_Params& print_params = print_pages_params_->params;
bool cancel = false;
Send(new PrintHostMsg_CheckForCancel(routing_id(),
print_params.preview_ui_id,
print_params.preview_request_id,
&cancel));
if (cancel)
notify_browser_of_print_failure_ = false;
return cancel;
}
bool PrintWebViewHelper::PreviewPageRendered(int page_number,
printing::Metafile* metafile) {
DCHECK_GE(page_number, printing::FIRST_PAGE_INDEX);
// For non-modifiable files, |metafile| should be NULL, so do not bother
// sending a message. If we don't generate draft metafiles, |metafile| is
// NULL.
if (!print_preview_context_.IsModifiable() ||
!print_preview_context_.generate_draft_pages()) {
DCHECK(!metafile);
return true;
}
if (!metafile) {
NOTREACHED();
print_preview_context_.set_error(
PREVIEW_ERROR_PAGE_RENDERED_WITHOUT_METAFILE);
return false;
}
PrintHostMsg_DidPreviewPage_Params preview_page_params;
// Get the size of the resulting metafile.
uint32 buf_size = metafile->GetDataSize();
DCHECK_GT(buf_size, 0u);
if (!CopyMetafileDataToSharedMem(
metafile, &(preview_page_params.metafile_data_handle))) {
LOG(ERROR) << "CopyMetafileDataToSharedMem failed";
print_preview_context_.set_error(PREVIEW_ERROR_METAFILE_COPY_FAILED);
return false;
}
preview_page_params.data_size = buf_size;
preview_page_params.page_number = page_number;
preview_page_params.preview_request_id =
print_pages_params_->params.preview_request_id;
Send(new PrintHostMsg_DidPreviewPage(routing_id(), preview_page_params));
return true;
}
PrintWebViewHelper::PrintPreviewContext::PrintPreviewContext()
: frame_(NULL),
total_page_count_(0),
current_page_index_(0),
generate_draft_pages_(true),
print_ready_metafile_page_count_(0),
error_(PREVIEW_ERROR_NONE),
state_(UNINITIALIZED) {
}
PrintWebViewHelper::PrintPreviewContext::~PrintPreviewContext() {
}
void PrintWebViewHelper::PrintPreviewContext::InitWithFrame(
WebKit::WebFrame* web_frame) {
DCHECK(web_frame);
DCHECK(!IsRendering());
state_ = INITIALIZED;
frame_ = web_frame;
node_.reset();
}
void PrintWebViewHelper::PrintPreviewContext::InitWithNode(
const WebKit::WebNode& web_node) {
DCHECK(!web_node.isNull());
DCHECK(web_node.document().frame());
DCHECK(!IsRendering());
state_ = INITIALIZED;
frame_ = web_node.document().frame();
node_ = web_node;
}
void PrintWebViewHelper::PrintPreviewContext::OnPrintPreview() {
DCHECK_EQ(INITIALIZED, state_);
ClearContext();
}
bool PrintWebViewHelper::PrintPreviewContext::CreatePreviewDocument(
const PrintMsg_Print_Params& print_params,
const std::vector<int>& pages,
bool ignore_css_margins) {
DCHECK_EQ(INITIALIZED, state_);
state_ = RENDERING;
metafile_.reset(new printing::PreviewMetafile);
if (!metafile_->Init()) {
set_error(PREVIEW_ERROR_METAFILE_INIT_FAILED);
LOG(ERROR) << "PreviewMetafile Init failed";
return false;
}
// Need to make sure old object gets destroyed first.
prep_frame_view_.reset(new PrepareFrameAndViewForPrint(print_params, frame(),
node()));
UpdateFrameAndViewFromCssPageLayout(frame_, node_, prep_frame_view_.get(),
print_params, ignore_css_margins);
total_page_count_ = prep_frame_view_->GetExpectedPageCount();
if (total_page_count_ == 0) {
LOG(ERROR) << "CreatePreviewDocument got 0 page count";
set_error(PREVIEW_ERROR_ZERO_PAGES);
return false;
}
int selected_page_count = pages.size();
current_page_index_ = 0;
print_ready_metafile_page_count_ = selected_page_count;
pages_to_render_ = pages;
if (selected_page_count == 0) {
print_ready_metafile_page_count_ = total_page_count_;
// Render all pages.
for (int i = 0; i < total_page_count_; ++i)
pages_to_render_.push_back(i);
} else if (generate_draft_pages_) {
int pages_index = 0;
for (int i = 0; i < total_page_count_; ++i) {
if (pages_index < selected_page_count && i == pages[pages_index]) {
pages_index++;
continue;
}
pages_to_render_.push_back(i);
}
}
document_render_time_ = base::TimeDelta();
begin_time_ = base::TimeTicks::Now();
return true;
}
void PrintWebViewHelper::PrintPreviewContext::RenderedPreviewPage(
const base::TimeDelta& page_time) {
DCHECK_EQ(RENDERING, state_);
document_render_time_ += page_time;
UMA_HISTOGRAM_TIMES("PrintPreview.RenderPDFPageTime", page_time);
}
void PrintWebViewHelper::PrintPreviewContext::AllPagesRendered() {
DCHECK_EQ(RENDERING, state_);
state_ = DONE;
prep_frame_view_->FinishPrinting();
}
void PrintWebViewHelper::PrintPreviewContext::FinalizePrintReadyDocument() {
DCHECK(IsRendering());
base::TimeTicks begin_time = base::TimeTicks::Now();
metafile_->FinishDocument();
if (print_ready_metafile_page_count_ <= 0) {
NOTREACHED();
return;
}
UMA_HISTOGRAM_MEDIUM_TIMES("PrintPreview.RenderToPDFTime",
document_render_time_);
base::TimeDelta total_time = (base::TimeTicks::Now() - begin_time) +
document_render_time_;
UMA_HISTOGRAM_MEDIUM_TIMES("PrintPreview.RenderAndGeneratePDFTime",
total_time);
UMA_HISTOGRAM_MEDIUM_TIMES("PrintPreview.RenderAndGeneratePDFTimeAvgPerPage",
total_time / pages_to_render_.size());
}
void PrintWebViewHelper::PrintPreviewContext::Finished() {
DCHECK_EQ(DONE, state_);
state_ = INITIALIZED;
ClearContext();
}
void PrintWebViewHelper::PrintPreviewContext::Failed(bool report_error) {
DCHECK(state_ == INITIALIZED || state_ == RENDERING);
state_ = INITIALIZED;
if (report_error) {
DCHECK_NE(PREVIEW_ERROR_NONE, error_);
UMA_HISTOGRAM_ENUMERATION("PrintPreview.RendererError", error_,
PREVIEW_ERROR_LAST_ENUM);
}
ClearContext();
}
int PrintWebViewHelper::PrintPreviewContext::GetNextPageNumber() {
DCHECK_EQ(RENDERING, state_);
if (IsFinalPageRendered())
return -1;
return pages_to_render_[current_page_index_++];
}
bool PrintWebViewHelper::PrintPreviewContext::IsRendering() const {
return state_ == RENDERING || state_ == DONE;
}
bool PrintWebViewHelper::PrintPreviewContext::IsModifiable() const {
// The only kind of node we can print right now is a PDF node.
return !PrintingNodeOrPdfFrame(frame_, node_);
}
bool PrintWebViewHelper::PrintPreviewContext::IsLastPageOfPrintReadyMetafile()
const {
DCHECK(IsRendering());
return current_page_index_ == print_ready_metafile_page_count_;
}
bool PrintWebViewHelper::PrintPreviewContext::IsFinalPageRendered() const {
DCHECK(IsRendering());
return static_cast<size_t>(current_page_index_) == pages_to_render_.size();
}
void PrintWebViewHelper::PrintPreviewContext::set_generate_draft_pages(
bool generate_draft_pages) {
DCHECK_EQ(INITIALIZED, state_);
generate_draft_pages_ = generate_draft_pages;
}
void PrintWebViewHelper::PrintPreviewContext::set_error(
enum PrintPreviewErrorBuckets error) {
error_ = error;
}
WebKit::WebFrame* PrintWebViewHelper::PrintPreviewContext::frame() {
// TODO(thestig) turn this back into a DCHECK when http://crbug.com/118303 is
// resolved.
CHECK(state_ != UNINITIALIZED);
return frame_;
}
const WebKit::WebNode& PrintWebViewHelper::PrintPreviewContext::node() const {
DCHECK(state_ != UNINITIALIZED);
return node_;
}
int PrintWebViewHelper::PrintPreviewContext::total_page_count() const {
DCHECK(state_ != UNINITIALIZED);
return total_page_count_;
}
bool PrintWebViewHelper::PrintPreviewContext::generate_draft_pages() const {
return generate_draft_pages_;
}
printing::PreviewMetafile* PrintWebViewHelper::PrintPreviewContext::metafile() {
DCHECK(IsRendering());
return metafile_.get();
}
int PrintWebViewHelper::PrintPreviewContext::last_error() const {
return error_;
}
gfx::Size PrintWebViewHelper::PrintPreviewContext::GetPrintCanvasSize() const {
DCHECK(IsRendering());
return prep_frame_view_->GetPrintCanvasSize();
}
void PrintWebViewHelper::PrintPreviewContext::ClearContext() {
prep_frame_view_.reset();
metafile_.reset();
pages_to_render_.clear();
error_ = PREVIEW_ERROR_NONE;
}