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// Copyright (c) 2011 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 "content/browser/renderer_host/clipboard_message_filter.h"
#import <Cocoa/Cocoa.h>
#include <stddef.h>
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/mac/scoped_nsobject.h"
#include "base/macros.h"
#include "base/strings/sys_string_conversions.h"
#include "content/public/browser/browser_thread.h"
#import "ui/base/cocoa/find_pasteboard.h"
namespace content {
namespace {
// The number of utf16 code units that will be written to the find pasteboard,
// longer texts are silently ignored. This is to prevent that a compromised
// renderer can write unlimited amounts of data into the find pasteboard.
static const size_t kMaxFindPboardStringLength = 4096;
class WriteFindPboardWrapper {
public:
explicit WriteFindPboardWrapper(NSString* text)
: text_([text retain]) {}
void Run() {
[[FindPasteboard sharedInstance] setFindText:text_];
}
private:
base::scoped_nsobject<NSString> text_;
DISALLOW_COPY_AND_ASSIGN(WriteFindPboardWrapper);
};
} // namespace
// Called on the IO thread.
void ClipboardMessageFilter::OnFindPboardWriteString(
const base::string16& text) {
if (text.length() <= kMaxFindPboardStringLength) {
NSString* nsText = base::SysUTF16ToNSString(text);
if (nsText) {
// FindPasteboard must be used on the UI thread.
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE, base::Bind(
&WriteFindPboardWrapper::Run,
base::Owned(new WriteFindPboardWrapper(nsText))));
}
}
}
} // namespace content
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