1 // Copyright (c) 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.
5 #include "ui/base/x/selection_requestor.h"
7 #include "base/message_loop/message_pump_x11.h"
8 #include "base/run_loop.h"
9 #include "ui/base/x/selection_utils.h"
10 #include "ui/base/x/x11_util.h"
16 const char kChromeSelection[] = "CHROME_SELECTION";
18 const char* kAtomsToCache[] = {
25 SelectionRequestor::SelectionRequestor(Display* x_display,
28 : x_display_(x_display),
30 selection_name_(selection_name),
31 atom_cache_(x_display_, kAtomsToCache) {
34 SelectionRequestor::~SelectionRequestor() {}
36 bool SelectionRequestor::PerformBlockingConvertSelection(
38 scoped_refptr<base::RefCountedMemory>* out_data,
39 size_t* out_data_bytes,
40 size_t* out_data_items,
42 // The name of the property we're asking to be set on |x_window_|.
43 Atom property_to_set = atom_cache_.GetAtom(kChromeSelection);
45 XConvertSelection(x_display_,
52 // Now that we've thrown our message off to the X11 server, we block waiting
54 base::MessageLoopForUI* loop = base::MessageLoopForUI::current();
55 base::MessageLoop::ScopedNestableTaskAllower allow_nested(loop);
56 base::RunLoop run_loop;
58 PendingRequest pending_request(target, run_loop.QuitClosure());
59 pending_requests_.push_back(&pending_request);
61 DCHECK(!pending_requests_.empty());
62 DCHECK_EQ(&pending_request, pending_requests_.back());
63 pending_requests_.pop_back();
65 if (pending_request.returned_property != property_to_set)
68 return ui::GetRawBytesOfProperty(x_window_, pending_request.returned_property,
69 out_data, out_data_bytes, out_data_items,
73 SelectionData SelectionRequestor::RequestAndWaitForTypes(
74 const std::vector< ::Atom>& types) {
75 for (std::vector< ::Atom>::const_iterator it = types.begin();
76 it != types.end(); ++it) {
77 scoped_refptr<base::RefCountedMemory> data;
78 size_t data_bytes = 0;
80 if (PerformBlockingConvertSelection(*it,
86 return SelectionData(type, data);
90 return SelectionData();
93 void SelectionRequestor::OnSelectionNotify(const XSelectionEvent& event) {
94 // Find the PendingRequest for the corresponding XConvertSelection call. If
95 // there are multiple pending requests on the same target, satisfy them in
97 PendingRequest* request_notified = NULL;
98 if (selection_name_ == event.selection) {
99 for (std::list<PendingRequest*>::iterator iter = pending_requests_.begin();
100 iter != pending_requests_.end(); ++iter) {
101 PendingRequest* request = *iter;
102 if (request->returned)
104 if (request->target != event.target)
106 request_notified = request;
111 // This event doesn't correspond to any XConvertSelection calls that we
112 // issued in PerformBlockingConvertSelection. This shouldn't happen, but any
113 // client can send any message, so it can happen.
114 if (!request_notified)
117 request_notified->returned_property = event.property;
118 request_notified->returned = true;
119 request_notified->quit_closure.Run();
122 SelectionRequestor::PendingRequest::PendingRequest(Atom target,
123 base::Closure quit_closure)
125 quit_closure(quit_closure),
126 returned_property(None),
130 SelectionRequestor::PendingRequest::~PendingRequest() {