Initial Greasemonkey support

chrome/renderer/greasemonkey_slave.cc

+// Copyright (c) 2008 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 "chrome/renderer/greasemonkey_slave.h"
+
+#include "base/logging.h"
+#include "base/pickle.h"
+#include "base/shared_memory.h"
+
+GreasemonkeySlave::GreasemonkeySlave() : shared_memory_(NULL) {
+}
+
+bool GreasemonkeySlave::UpdateScripts(SharedMemoryHandle shared_memory) {
+  scripts_.clear();
+
+  // Create the shared memory object.
+  shared_memory_.reset(new SharedMemory(shared_memory, true)); // read-only
+  if (!shared_memory_.get())
+    return false;
+
+  // First get the size of the memory block.
+  if (!shared_memory_->Map(sizeof(Pickle::Header)))
+    return false;
+  Pickle::Header* pickle_header =
+      reinterpret_cast<Pickle::Header*>(shared_memory_->memory());
+
+  // Now map in the rest of the block.
+  int pickle_size = sizeof(Pickle::Header) + pickle_header->payload_size;
+  shared_memory_->Unmap();
+  if (!shared_memory_->Map(pickle_size))
+    return false;
+
+  // Unpickle scripts.
+  void* iter = NULL;
+  int num_scripts = 0;
+  Pickle pickle(reinterpret_cast<char*>(shared_memory_->memory()),
+                pickle_size);
+  pickle.ReadInt(&iter, &num_scripts);
+
+  for (int i = 0; i < num_scripts; ++i) {
+    const char* data = NULL;
+    int data_length = 0;
+    pickle.ReadData(&iter, &data, &data_length);
+
+    GreasemonkeyScript script;
+    if (script.Parse(StringPiece(data, data_length))) {
+      scripts_.push_back(script);
+    }
+  }
+
+  return true;
+}
+
+bool GreasemonkeySlave::InjectScripts(WebFrame* frame) {
+  // TODO(aa): Check script patterns here
+
+  for (std::vector<GreasemonkeyScript>::iterator script = scripts_.begin();
+       script != scripts_.end(); ++script) {
+    // TODO(aa): Pass in URL to script when we have it.
+    frame->ExecuteJavaScript(script->GetBody().as_string(),
+                             "Greasemonkey Script");
+  }
+
+  return true;
+}