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// Copyright 2014 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 "headless/lib/browser/protocol/page_handler.h"
#include "base/bind.h"
#include "content/public/browser/web_contents.h"
#include "printing/units.h"
namespace headless {
namespace protocol {
#if BUILDFLAG(ENABLE_PRINTING)
namespace {
// The max and min value should match the ones in scaling_settings.html.
// Update both files at the same time.
const double kScaleMaxVal = 200;
const double kScaleMinVal = 10;
} // namespace
#endif // BUILDFLAG(ENABLE_PRINTING)
PageHandler::PageHandler(scoped_refptr<content::DevToolsAgentHost> agent_host,
content::WebContents* web_contents)
: agent_host_(agent_host), web_contents_(web_contents) {
DCHECK(web_contents_);
DCHECK(agent_host_);
}
PageHandler::~PageHandler() = default;
void PageHandler::Wire(UberDispatcher* dispatcher) {
Page::Dispatcher::wire(dispatcher, this);
}
Response PageHandler::Disable() {
return Response::Success();
}
void PageHandler::PrintToPDF(Maybe<bool> landscape,
Maybe<bool> display_header_footer,
Maybe<bool> print_background,
Maybe<double> scale,
Maybe<double> paper_width,
Maybe<double> paper_height,
Maybe<double> margin_top,
Maybe<double> margin_bottom,
Maybe<double> margin_left,
Maybe<double> margin_right,
Maybe<String> page_ranges,
Maybe<bool> ignore_invalid_page_ranges,
Maybe<String> header_template,
Maybe<String> footer_template,
Maybe<bool> prefer_css_page_size,
Maybe<String> transfer_mode,
std::unique_ptr<PrintToPDFCallback> callback) {
#if BUILDFLAG(ENABLE_PRINTING)
HeadlessPrintSettings settings;
settings.landscape = landscape.fromMaybe(false);
settings.display_header_footer = display_header_footer.fromMaybe(false);
settings.should_print_backgrounds = print_background.fromMaybe(false);
settings.scale = scale.fromMaybe(1.0);
if (settings.scale > kScaleMaxVal / 100 ||
settings.scale < kScaleMinVal / 100) {
callback->sendFailure(
Response::InvalidParams("scale is outside [0.1 - 2] range"));
return;
}
settings.page_ranges = page_ranges.fromMaybe("");
settings.ignore_invalid_page_ranges =
ignore_invalid_page_ranges.fromMaybe(false);
double paper_width_in_inch =
paper_width.fromMaybe(printing::kLetterWidthInch);
double paper_height_in_inch =
paper_height.fromMaybe(printing::kLetterHeightInch);
if (paper_width_in_inch <= 0) {
callback->sendFailure(
Response::InvalidParams("paperWidth is zero or negative"));
return;
}
if (paper_height_in_inch <= 0) {
callback->sendFailure(
Response::InvalidParams("paperHeight is zero or negative"));
return;
}
settings.paper_size_in_points =
gfx::Size(paper_width_in_inch * printing::kPointsPerInch,
paper_height_in_inch * printing::kPointsPerInch);
// Set default margin to 1.0cm = ~2/5 of an inch.
static constexpr double kDefaultMarginInMM = 10.0;
static constexpr double kMMPerInch = printing::kMicronsPerMil;
static constexpr double kDefaultMarginInInch =
kDefaultMarginInMM / kMMPerInch;
double margin_top_in_inch = margin_top.fromMaybe(kDefaultMarginInInch);
double margin_right_in_inch = margin_right.fromMaybe(kDefaultMarginInInch);
double margin_bottom_in_inch = margin_bottom.fromMaybe(kDefaultMarginInInch);
double margin_left_in_inch = margin_left.fromMaybe(kDefaultMarginInInch);
settings.header_template = header_template.fromMaybe("");
settings.footer_template = footer_template.fromMaybe("");
if (margin_top_in_inch < 0) {
callback->sendFailure(Response::InvalidParams("marginTop is negative"));
return;
}
if (margin_bottom_in_inch < 0) {
callback->sendFailure(Response::InvalidParams("marginBottom is negative"));
return;
}
if (margin_left_in_inch < 0) {
callback->sendFailure(Response::InvalidParams("marginLeft is negative"));
return;
}
if (margin_right_in_inch < 0) {
callback->sendFailure(Response::InvalidParams("marginRight is negative"));
return;
}
settings.margins_in_points.top =
margin_top_in_inch * printing::kPointsPerInch;
settings.margins_in_points.bottom =
margin_bottom_in_inch * printing::kPointsPerInch;
settings.margins_in_points.left =
margin_left_in_inch * printing::kPointsPerInch;
settings.margins_in_points.right =
margin_right_in_inch * printing::kPointsPerInch;
settings.prefer_css_page_size = prefer_css_page_size.fromMaybe(false);
bool return_as_stream = transfer_mode.fromMaybe("") ==
Page::PrintToPDF::TransferModeEnum::ReturnAsStream;
HeadlessPrintManager::FromWebContents(web_contents_)
->GetPDFContents(
web_contents_->GetMainFrame(), settings,
base::BindOnce(&PageHandler::PDFCreated, weak_factory_.GetWeakPtr(),
return_as_stream, std::move(callback)));
#else
callback->sendFailure(Response::ServerError("Printing is not enabled"));
return;
#endif // BUILDFLAG(ENABLE_PRINTING)
}
#if BUILDFLAG(ENABLE_PRINTING)
void PageHandler::PDFCreated(
bool returnAsStream,
std::unique_ptr<PageHandler::PrintToPDFCallback> callback,
HeadlessPrintManager::PrintResult print_result,
scoped_refptr<base::RefCountedMemory> data) {
std::unique_ptr<base::DictionaryValue> response;
if (print_result != HeadlessPrintManager::PRINT_SUCCESS) {
callback->sendFailure(Response::ServerError(
HeadlessPrintManager::PrintResultToString(print_result)));
return;
}
if (!returnAsStream) {
callback->sendSuccess(protocol::Binary::fromRefCounted(data),
Maybe<std::string>());
return;
}
std::string handle = agent_host_->CreateIOStreamFromData(data);
callback->sendSuccess(protocol::Binary(), handle);
}
#endif // BUILDFLAG(ENABLE_PRINTING)
} // namespace protocol
} // namespace headless
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