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// Copyright (c) 2009 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 "app/l10n_util.h"
#include "base/gfx/jpeg_codec.h"
#include "base/logging.h"
#include "chrome/common/render_messages.h"
#include "chrome/renderer/render_view.h"
#include "grit/generated_resources.h"
#include "printing/units.h"
#include "webkit/api/public/WebFrame.h"
#include "webkit/api/public/WebRect.h"
#include "webkit/api/public/WebScreenInfo.h"
#include "webkit/api/public/WebSize.h"
#include "webkit/api/public/WebURLRequest.h"
#include "webkit/glue/webkit_glue.h"
using WebKit::WebFrame;
using WebKit::WebRect;
using WebKit::WebScreenInfo;
using WebKit::WebString;
using WebKit::WebURLRequest;
PrepareFrameAndViewForPrint::PrepareFrameAndViewForPrint(
const ViewMsg_Print_Params& print_params,
WebFrame* frame,
WebView* web_view)
: frame_(frame), web_view_(web_view), expected_pages_count_(0) {
print_canvas_size_.set_width(
printing::ConvertUnit(print_params.printable_size.width(),
static_cast<int>(print_params.dpi),
print_params.desired_dpi));
print_canvas_size_.set_height(
printing::ConvertUnit(print_params.printable_size.height(),
static_cast<int>(print_params.dpi),
print_params.desired_dpi));
// 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(print_canvas_size_);
print_layout_size.set_height(static_cast<int>(
static_cast<double>(print_layout_size.height()) * 1.25));
prev_view_size_ = web_view->size();
web_view->resize(print_layout_size);
expected_pages_count_ = frame->printBegin(print_canvas_size_);
}
PrepareFrameAndViewForPrint::~PrepareFrameAndViewForPrint() {
frame_->printEnd();
web_view_->resize(prev_view_size_);
}
PrintWebViewHelper::PrintWebViewHelper(RenderView* render_view)
: render_view_(render_view),
user_cancelled_scripted_print_count_(0) {}
PrintWebViewHelper::~PrintWebViewHelper() {}
void PrintWebViewHelper::DidFinishPrinting(bool success) {
if (!success) {
WebView* web_view = print_web_view_.get();
if (!web_view)
web_view = render_view_->webview();
// TODO: Create an async alert (http://crbug.com/14918).
render_view_->RunJavaScriptAlert(web_view->GetMainFrame(),
l10n_util::GetString(IDS_PRINT_SPOOL_FAILED_ERROR_TEXT));
}
if (print_web_view_.get()) {
print_web_view_->close();
print_web_view_.release(); // Close deletes object.
print_pages_params_.reset();
}
}
bool PrintWebViewHelper::CopyAndPrint(const ViewMsg_PrintPages_Params& params,
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).
WebPreferences prefs = render_view_->webkit_preferences();
prefs.javascript_enabled = false;
prefs.java_enabled = false;
print_web_view_.reset(WebView::Create(this, NULL));
prefs.Apply(print_web_view_.get());
print_web_view_->InitializeMainFrame();
print_pages_params_.reset(new ViewMsg_PrintPages_Params(params));
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 that will do the
// actual printing.
print_web_view_->GetMainFrame()->loadRequest(WebURLRequest(url));
return true;
}
void PrintWebViewHelper::PrintPages(const ViewMsg_PrintPages_Params& params,
WebFrame* frame) {
PrepareFrameAndViewForPrint prep_frame_view(params.params,
frame,
frame->view());
int page_count = prep_frame_view.GetExpectedPageCount();
Send(new ViewHostMsg_DidGetPrintedPagesCount(routing_id(),
params.params.document_cookie,
page_count));
if (page_count) {
ViewMsg_PrintPage_Params page_params;
page_params.params = params.params;
if (params.pages.empty()) {
for (int i = 0; i < page_count; ++i) {
page_params.page_number = i;
PrintPage(page_params, prep_frame_view.GetPrintCanvasSize(), frame);
}
} else {
for (size_t i = 0; i < params.pages.size(); ++i) {
page_params.page_number = params.pages[i];
PrintPage(page_params, prep_frame_view.GetPrintCanvasSize(), frame);
}
}
}
}
void PrintWebViewHelper::PrintPageAsJPEG(
const ViewMsg_PrintPage_Params& params,
WebFrame* frame,
float zoom_factor,
std::vector<unsigned char>* image_data) {
PrepareFrameAndViewForPrint prep_frame_view(params.params,
frame,
frame->view());
const gfx::Size& canvas_size(prep_frame_view.GetPrintCanvasSize());
// Since WebKit extends the page width depending on the magical shrink
// factor we make sure the canvas covers the worst case scenario
// (x2.0 currently). PrintContext will then set the correct clipping region.
int size_x = static_cast<int>(canvas_size.width() * params.params.max_shrink);
int size_y = static_cast<int>(canvas_size.height() *
params.params.max_shrink);
// Access the bitmap from the canvas device.
skia::PlatformCanvas canvas(size_x, size_y, true);
frame->printPage(params.page_number, webkit_glue::ToWebCanvas(&canvas));
const SkBitmap& bitmap = canvas.getDevice()->accessBitmap(false);
// Encode the SkBitmap to jpeg.
SkAutoLockPixels image_lock(bitmap);
bool encoded = JPEGCodec::Encode(
reinterpret_cast<unsigned char*>(bitmap.getAddr32(0, 0)),
JPEGCodec::FORMAT_BGRA,
static_cast<int>(bitmap.width() * zoom_factor),
static_cast<int>(bitmap.height() * zoom_factor),
static_cast<int>(bitmap.rowBytes()),
90,
image_data);
DCHECK(encoded);
}
bool PrintWebViewHelper::Send(IPC::Message* msg) {
return render_view_->Send(msg);
}
int32 PrintWebViewHelper::routing_id() {
return render_view_->routing_id();
}
WebRect PrintWebViewHelper::windowRect() {
NOTREACHED();
return WebRect();
}
WebRect PrintWebViewHelper::windowResizerRect() {
NOTREACHED();
return WebRect();
}
WebRect PrintWebViewHelper::rootWindowRect() {
NOTREACHED();
return WebRect();
}
WebScreenInfo PrintWebViewHelper::screenInfo() {
NOTREACHED();
return WebScreenInfo();
}
void PrintWebViewHelper::DidStopLoading(WebView* webview) {
DCHECK(print_pages_params_.get() != NULL);
DCHECK_EQ(webview, print_web_view_.get());
PrintPages(*print_pages_params_.get(), print_web_view_->GetMainFrame());
}
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