blob: 5e0427dc9223f2d08007322a2106db78b081e226 [file] [log] [blame]
// Copyright 2013 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 "android_webview/browser/aw_pdf_exporter.h"
#include <memory>
#include <utility>
#include <vector>
#include "android_webview/browser/aw_print_manager.h"
#include "android_webview/native_jni/AwPdfExporter_jni.h"
#include "base/android/jni_android.h"
#include "base/android/jni_array.h"
#include "base/bind.h"
#include "content/public/browser/browser_thread.h"
#include "printing/print_settings.h"
#include "printing/units.h"
using base::android::JavaParamRef;
using base::android::JavaRef;
using base::android::ScopedJavaLocalRef;
namespace android_webview {
namespace {
void JNI_AwPdfExporter_GetPageRanges(JNIEnv* env,
const JavaRef<jintArray>& int_arr,
printing::PageRanges* range_vector) {
std::vector<int> pages;
base::android::JavaIntArrayToIntVector(env, int_arr, &pages);
for (int page : pages) {
printing::PageRange range;
range.from = page;
range.to = page;
range_vector->push_back(range);
}
}
} // namespace
AwPdfExporter::AwPdfExporter(JNIEnv* env,
const JavaRef<jobject>& obj,
content::WebContents* web_contents)
: java_ref_(env, obj), web_contents_(web_contents) {
DCHECK(!obj.is_null());
Java_AwPdfExporter_setNativeAwPdfExporter(env, obj,
reinterpret_cast<intptr_t>(this));
}
AwPdfExporter::~AwPdfExporter() {
JNIEnv* env = base::android::AttachCurrentThread();
ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
if (obj.is_null())
return;
// Clear the Java peer's weak pointer to |this| object.
Java_AwPdfExporter_setNativeAwPdfExporter(env, obj, 0);
}
void AwPdfExporter::ExportToPdf(JNIEnv* env,
const JavaParamRef<jobject>& obj,
int fd,
const JavaParamRef<jintArray>& pages,
const JavaParamRef<jobject>& cancel_signal) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
printing::PageRanges page_ranges;
JNI_AwPdfExporter_GetPageRanges(env, pages, &page_ranges);
AwPrintManager* print_manager = AwPrintManager::CreateForWebContents(
web_contents_, CreatePdfSettings(env, obj, page_ranges), fd,
base::BindOnce(&AwPdfExporter::DidExportPdf, base::Unretained(this)));
if (!print_manager->PrintNow())
DidExportPdf(0);
}
namespace {
// Converts from 1/1000 of inches to device units using DPI.
int MilsToDots(int val, int dpi) {
return static_cast<int>(printing::ConvertUnitDouble(val, 1000.0, dpi));
}
} // namespace
std::unique_ptr<printing::PrintSettings> AwPdfExporter::CreatePdfSettings(
JNIEnv* env,
const JavaRef<jobject>& obj,
const printing::PageRanges& page_ranges) {
auto settings = std::make_unique<printing::PrintSettings>();
int dpi = Java_AwPdfExporter_getDpi(env, obj);
int width = Java_AwPdfExporter_getPageWidth(env, obj);
int height = Java_AwPdfExporter_getPageHeight(env, obj);
gfx::Size physical_size_device_units;
int width_in_dots = MilsToDots(width, dpi);
int height_in_dots = MilsToDots(height, dpi);
physical_size_device_units.SetSize(width_in_dots, height_in_dots);
gfx::Rect printable_area_device_units;
// Assume full page is printable for now.
printable_area_device_units.SetRect(0, 0, width_in_dots, height_in_dots);
if (!page_ranges.empty())
settings->set_ranges(page_ranges);
settings->set_dpi(dpi);
// TODO(sgurun) verify that the value for newly added parameter for
// (i.e. landscape_needs_flip) is correct.
settings->SetPrinterPrintableArea(physical_size_device_units,
printable_area_device_units, true);
printing::PageMargins margins;
margins.left = MilsToDots(Java_AwPdfExporter_getLeftMargin(env, obj), dpi);
margins.right = MilsToDots(Java_AwPdfExporter_getRightMargin(env, obj), dpi);
margins.top = MilsToDots(Java_AwPdfExporter_getTopMargin(env, obj), dpi);
margins.bottom =
MilsToDots(Java_AwPdfExporter_getBottomMargin(env, obj), dpi);
settings->SetCustomMargins(margins);
settings->set_should_print_backgrounds(true);
return settings;
}
void AwPdfExporter::DidExportPdf(int page_count) {
JNIEnv* env = base::android::AttachCurrentThread();
ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
if (obj.is_null())
return;
Java_AwPdfExporter_didExportPdf(env, obj, page_count);
}
} // namespace android_webview