-
Notifications
You must be signed in to change notification settings - Fork 15k
/
print_preview_message_handler.cc
212 lines (173 loc) · 7.1 KB
/
print_preview_message_handler.cc
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
// Copyright (c) 2018 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.
#include "shell/browser/printing/print_preview_message_handler.h"
#include <memory>
#include <utility>
#include "base/bind.h"
#include "base/memory/read_only_shared_memory_region.h"
#include "base/memory/ref_counted.h"
#include "base/memory/ref_counted_memory.h"
#include "base/task/post_task.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/printing/print_job_manager.h"
#include "chrome/browser/printing/printer_query.h"
#include "components/printing/browser/print_composite_client.h"
#include "components/printing/browser/print_manager_utils.h"
#include "components/printing/common/print_messages.h"
#include "components/services/print_compositor/public/cpp/print_service_mojo_types.h"
#include "content/public/browser/browser_task_traits.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/web_contents.h"
#include "mojo/public/cpp/bindings/callback_helpers.h"
#include "shell/common/gin_helper/locker.h"
#include "third_party/blink/public/common/associated_interfaces/associated_interface_provider.h"
#include "shell/common/node_includes.h"
using content::BrowserThread;
namespace electron {
namespace {
void StopWorker(int document_cookie) {
if (document_cookie <= 0)
return;
scoped_refptr<printing::PrintQueriesQueue> queue =
g_browser_process->print_job_manager()->queue();
std::unique_ptr<printing::PrinterQuery> printer_query =
queue->PopPrinterQuery(document_cookie);
if (printer_query.get()) {
base::PostTask(FROM_HERE, {BrowserThread::IO},
base::BindOnce(&printing::PrinterQuery::StopWorker,
std::move(printer_query)));
}
}
} // namespace
PrintPreviewMessageHandler::PrintPreviewMessageHandler(
content::WebContents* web_contents)
: content::WebContentsObserver(web_contents), weak_ptr_factory_(this) {
DCHECK(web_contents);
}
PrintPreviewMessageHandler::~PrintPreviewMessageHandler() = default;
bool PrintPreviewMessageHandler::OnMessageReceived(
const IPC::Message& message,
content::RenderFrameHost* render_frame_host) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP_WITH_PARAM(PrintPreviewMessageHandler, message,
render_frame_host)
IPC_MESSAGE_HANDLER(PrintHostMsg_MetafileReadyForPrinting,
OnMetafileReadyForPrinting)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
if (handled)
return true;
handled = true;
IPC_BEGIN_MESSAGE_MAP(PrintPreviewMessageHandler, message)
IPC_MESSAGE_HANDLER(PrintHostMsg_PrintPreviewFailed, OnPrintPreviewFailed)
IPC_MESSAGE_HANDLER(PrintHostMsg_PrintPreviewCancelled,
OnPrintPreviewCancelled)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
void PrintPreviewMessageHandler::OnMetafileReadyForPrinting(
content::RenderFrameHost* render_frame_host,
const PrintHostMsg_DidPreviewDocument_Params& params,
const PrintHostMsg_PreviewIds& ids) {
// Always try to stop the worker.
StopWorker(params.document_cookie);
const PrintHostMsg_DidPrintContent_Params& content = params.content;
if (!content.metafile_data_region.IsValid() ||
params.expected_pages_count <= 0) {
RejectPromise(ids.request_id);
return;
}
if (printing::IsOopifEnabled()) {
auto* client =
printing::PrintCompositeClient::FromWebContents(web_contents());
DCHECK(client);
auto callback =
base::BindOnce(&PrintPreviewMessageHandler::OnCompositePdfDocumentDone,
weak_ptr_factory_.GetWeakPtr(), ids);
client->DoCompositeDocumentToPdf(
params.document_cookie, render_frame_host, content,
mojo::WrapCallbackWithDefaultInvokeIfNotRun(
std::move(callback),
printing::mojom::PrintCompositor::Status::kCompositingFailure,
base::ReadOnlySharedMemoryRegion()));
} else {
ResolvePromise(ids.request_id,
base::RefCountedSharedMemoryMapping::CreateFromWholeRegion(
content.metafile_data_region));
}
}
void PrintPreviewMessageHandler::OnCompositePdfDocumentDone(
const PrintHostMsg_PreviewIds& ids,
printing::mojom::PrintCompositor::Status status,
base::ReadOnlySharedMemoryRegion region) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
if (status != printing::mojom::PrintCompositor::Status::kSuccess) {
DLOG(ERROR) << "Compositing pdf failed with error " << status;
RejectPromise(ids.request_id);
return;
}
ResolvePromise(
ids.request_id,
base::RefCountedSharedMemoryMapping::CreateFromWholeRegion(region));
}
void PrintPreviewMessageHandler::OnPrintPreviewFailed(
int document_cookie,
const PrintHostMsg_PreviewIds& ids) {
StopWorker(document_cookie);
RejectPromise(ids.request_id);
}
void PrintPreviewMessageHandler::OnPrintPreviewCancelled(
int document_cookie,
const PrintHostMsg_PreviewIds& ids) {
StopWorker(document_cookie);
RejectPromise(ids.request_id);
}
void PrintPreviewMessageHandler::PrintToPDF(
base::DictionaryValue options,
gin_helper::Promise<v8::Local<v8::Value>> promise) {
int request_id;
options.GetInteger(printing::kPreviewRequestID, &request_id);
promise_map_.emplace(request_id, std::move(promise));
auto* focused_frame = web_contents()->GetFocusedFrame();
auto* rfh = focused_frame && focused_frame->HasSelection()
? focused_frame
: web_contents()->GetMainFrame();
if (!print_render_frame_.is_bound())
rfh->GetRemoteAssociatedInterfaces()->GetInterface(&print_render_frame_);
print_render_frame_->PrintPreview(options.Clone());
}
gin_helper::Promise<v8::Local<v8::Value>>
PrintPreviewMessageHandler::GetPromise(int request_id) {
auto it = promise_map_.find(request_id);
DCHECK(it != promise_map_.end());
gin_helper::Promise<v8::Local<v8::Value>> promise = std::move(it->second);
promise_map_.erase(it);
return promise;
}
void PrintPreviewMessageHandler::ResolvePromise(
int request_id,
scoped_refptr<base::RefCountedMemory> data_bytes) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
gin_helper::Promise<v8::Local<v8::Value>> promise = GetPromise(request_id);
v8::Isolate* isolate = promise.isolate();
gin_helper::Locker locker(isolate);
v8::HandleScope handle_scope(isolate);
v8::Context::Scope context_scope(
v8::Local<v8::Context>::New(isolate, promise.GetContext()));
v8::Local<v8::Value> buffer =
node::Buffer::Copy(isolate,
reinterpret_cast<const char*>(data_bytes->front()),
data_bytes->size())
.ToLocalChecked();
promise.Resolve(buffer);
}
void PrintPreviewMessageHandler::RejectPromise(int request_id) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
gin_helper::Promise<v8::Local<v8::Value>> promise = GetPromise(request_id);
promise.RejectWithErrorMessage("Failed to generate PDF");
}
WEB_CONTENTS_USER_DATA_KEY_IMPL(PrintPreviewMessageHandler)
} // namespace electron