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- // 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/browser_jni_headers/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);
- 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)
- 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);
- // Create an AwPrintManager for the provided WebContents if the
- // AwPrintManager doesn't exist.
- if (!AwPrintManager::FromWebContents(web_contents_))
- AwPrintManager::CreateForWebContents(web_contents_);
- // Update the parameters of the current print manager.
- AwPrintManager* print_manager =
- AwPrintManager::FromWebContents(web_contents_);
- print_manager->UpdateParam(CreatePdfSettings(env, obj, page_ranges), fd,
- base::BindRepeating(&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::ConvertUnitFloat(val, 1000, 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)
- return;
- Java_AwPdfExporter_didExportPdf(env, obj, page_count);
- }
- } // namespace android_webview
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