1 // Copyright 2013 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "android_webview/native/aw_pdf_exporter.h"
6
7 #include "android_webview/browser/browser_view_renderer.h"
8 #include "android_webview/browser/renderer_host/print_manager.h"
9 #include "base/android/jni_android.h"
10 #include "base/logging.h"
11 #include "content/public/browser/browser_thread.h"
12 #include "content/public/browser/web_contents.h"
13 #include "jni/AwPdfExporter_jni.h"
14 #include "printing/print_settings.h"
15 #include "printing/units.h"
16
17 using base::android::AttachCurrentThread;
18 using base::android::ScopedJavaGlobalRef;
19 using content::BrowserThread;
20 using content::WebContents;
21 using printing::ConvertUnitDouble;
22 using printing::PageMargins;
23 using printing::PrintSettings;
24
25 namespace android_webview {
26
AwPdfExporter(JNIEnv * env,jobject obj,BrowserViewRenderer * view_renderer,WebContents * web_contents)27 AwPdfExporter::AwPdfExporter(JNIEnv* env,
28 jobject obj,
29 BrowserViewRenderer* view_renderer,
30 WebContents* web_contents)
31 : java_ref_(env, obj),
32 view_renderer_(view_renderer),
33 web_contents_(web_contents) {
34 DCHECK(obj);
35 Java_AwPdfExporter_setNativeAwPdfExporter(
36 env, obj, reinterpret_cast<jint>(this));
37 }
38
~AwPdfExporter()39 AwPdfExporter::~AwPdfExporter() {
40 JNIEnv* env = AttachCurrentThread();
41 ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
42 if (obj.is_null())
43 return;
44 // Clear the Java peer's weak pointer to |this| object.
45 Java_AwPdfExporter_setNativeAwPdfExporter(env, obj.obj(), 0);
46 }
47
ExportToPdf(JNIEnv * env,jobject obj,int fd,jobject cancel_signal)48 void AwPdfExporter::ExportToPdf(JNIEnv* env,
49 jobject obj,
50 int fd,
51 jobject cancel_signal) {
52 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
53 CreatePdfSettings(env, obj);
54 print_manager_.reset(
55 new PrintManager(web_contents_, print_settings_.get(), fd, this));
56 if (!print_manager_->PrintNow())
57 DidExportPdf(false);
58 }
59
60 namespace {
61 // Converts from 1/1000 of inches to device units using DPI.
MilsToDots(int val,int dpi)62 int MilsToDots(int val, int dpi) {
63 return static_cast<int>(ConvertUnitDouble(val, 1000.0, dpi));
64 }
65
66 } // anonymous namespace
67
CreatePdfSettings(JNIEnv * env,jobject obj)68 void AwPdfExporter::CreatePdfSettings(JNIEnv* env, jobject obj) {
69 print_settings_.reset(new PrintSettings);
70 int dpi = Java_AwPdfExporter_getDpi(env, obj);
71 int width = Java_AwPdfExporter_getPageWidth(env, obj);
72 int height = Java_AwPdfExporter_getPageHeight(env, obj);
73 gfx::Size physical_size_device_units;
74 int width_in_dots = MilsToDots(width, dpi);
75 int height_in_dots = MilsToDots(height, dpi);
76 physical_size_device_units.SetSize(width_in_dots, height_in_dots);
77
78 gfx::Rect printable_area_device_units;
79 // Assume full page is printable for now.
80 printable_area_device_units.SetRect(0, 0, width_in_dots, height_in_dots);
81
82 print_settings_->set_dpi(dpi);
83 // TODO(sgurun) verify that the value for newly added parameter for
84 // (i.e. landscape_needs_flip) is correct.
85 print_settings_->SetPrinterPrintableArea(physical_size_device_units,
86 printable_area_device_units,
87 true);
88
89 PageMargins margins;
90 margins.left =
91 MilsToDots(Java_AwPdfExporter_getLeftMargin(env, obj), dpi);
92 margins.right =
93 MilsToDots(Java_AwPdfExporter_getRightMargin(env, obj), dpi);
94 margins.top =
95 MilsToDots(Java_AwPdfExporter_getTopMargin(env, obj), dpi);
96 margins.bottom =
97 MilsToDots(Java_AwPdfExporter_getBottomMargin(env, obj), dpi);
98 print_settings_->SetCustomMargins(margins);
99 print_settings_->set_should_print_backgrounds(true);
100 }
101
DidExportPdf(bool success)102 void AwPdfExporter::DidExportPdf(bool success) {
103 JNIEnv* env = AttachCurrentThread();
104 ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
105 if (obj.is_null())
106 return;
107 Java_AwPdfExporter_didExportPdf(env, obj.obj(), success);
108 }
109
IsCancelled()110 bool AwPdfExporter::IsCancelled() {
111 // TODO(sgurun) implement. Needs connecting with the |cancel_signal| passed
112 // in the constructor.
113 return false;
114 }
115
RegisterAwPdfExporter(JNIEnv * env)116 bool RegisterAwPdfExporter(JNIEnv* env) {
117 return RegisterNativesImpl(env) >= 0;
118 }
119
120 } // namespace android_webview
121