refactor: move devtools from brightray to atom (#15234)

atom/browser/ui/devtools_ui.cc

@@ -0,0 +1,120 @@
+// Copyright (c) 2012 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-CHROMIUM file.
+
+#include "atom/browser/ui/devtools_ui.h"
+
+#include <string>
+
+#include "base/memory/ref_counted_memory.h"
+#include "base/strings/string_util.h"
+#include "base/strings/stringprintf.h"
+#include "content/public/browser/devtools_frontend_host.h"
+#include "content/public/browser/url_data_source.h"
+#include "content/public/browser/web_contents.h"
+#include "content/public/browser/web_ui.h"
+
+namespace atom {
+
+namespace {
+
+const char kChromeUIDevToolsHost[] = "devtools";
+const char kChromeUIDevToolsBundledPath[] = "bundled";
+
+std::string PathWithoutParams(const std::string& path) {
+  return GURL(std::string("chrome-devtools://devtools/") + path)
+      .path()
+      .substr(1);
+}
+
+std::string GetMimeTypeForPath(const std::string& path) {
+  std::string filename = PathWithoutParams(path);
+  if (base::EndsWith(filename, ".html", base::CompareCase::INSENSITIVE_ASCII)) {
+    return "text/html";
+  } else if (base::EndsWith(filename, ".css",
+                            base::CompareCase::INSENSITIVE_ASCII)) {
+    return "text/css";
+  } else if (base::EndsWith(filename, ".js",
+                            base::CompareCase::INSENSITIVE_ASCII)) {
+    return "application/javascript";
+  } else if (base::EndsWith(filename, ".png",
+                            base::CompareCase::INSENSITIVE_ASCII)) {
+    return "image/png";
+  } else if (base::EndsWith(filename, ".gif",
+                            base::CompareCase::INSENSITIVE_ASCII)) {
+    return "image/gif";
+  } else if (base::EndsWith(filename, ".svg",
+                            base::CompareCase::INSENSITIVE_ASCII)) {
+    return "image/svg+xml";
+  } else if (base::EndsWith(filename, ".manifest",
+                            base::CompareCase::INSENSITIVE_ASCII)) {
+    return "text/cache-manifest";
+  }
+  return "text/html";
+}
+
+class BundledDataSource : public content::URLDataSource {
+ public:
+  BundledDataSource() {}
+
+  // content::URLDataSource implementation.
+  std::string GetSource() const override { return kChromeUIDevToolsHost; }
+
+  void StartDataRequest(
+      const std::string& path,
+      const content::ResourceRequestInfo::WebContentsGetter& wc_getter,
+      const GotDataCallback& callback) override {
+    // Serve request from local bundle.
+    std::string bundled_path_prefix(kChromeUIDevToolsBundledPath);
+    bundled_path_prefix += "/";
+    if (base::StartsWith(path, bundled_path_prefix,
+                         base::CompareCase::INSENSITIVE_ASCII)) {
+      StartBundledDataRequest(path.substr(bundled_path_prefix.length()),
+                              callback);
+      return;
+    }
+
+    // We do not handle remote and custom requests.
+    callback.Run(nullptr);
+  }
+
+  std::string GetMimeType(const std::string& path) const override {
+    return GetMimeTypeForPath(path);
+  }
+
+  bool ShouldAddContentSecurityPolicy() const override { return false; }
+
+  bool ShouldDenyXFrameOptions() const override { return false; }
+
+  bool ShouldServeMimeTypeAsContentTypeHeader() const override { return true; }
+
+  void StartBundledDataRequest(const std::string& path,
+                               const GotDataCallback& callback) {
+    std::string filename = PathWithoutParams(path);
+    base::StringPiece resource =
+        content::DevToolsFrontendHost::GetFrontendResource(filename);
+
+    DLOG_IF(WARNING, resource.empty())
+        << "Unable to find dev tool resource: " << filename
+        << ". If you compiled with debug_devtools=1, try running with "
+           "--debug-devtools.";
+    scoped_refptr<base::RefCountedStaticMemory> bytes(
+        new base::RefCountedStaticMemory(resource.data(), resource.length()));
+    callback.Run(bytes.get());
+  }
+
+ private:
+  ~BundledDataSource() override {}
+  DISALLOW_COPY_AND_ASSIGN(BundledDataSource);
+};
+
+}  // namespace
+
+DevToolsUI::DevToolsUI(content::BrowserContext* browser_context,
+                       content::WebUI* web_ui)
+    : WebUIController(web_ui) {
+  web_ui->SetBindings(0);
+  content::URLDataSource::Add(browser_context, new BundledDataSource());
+}
+
+}  // namespace atom