Draft: Scaffold shell entry for Cobalt

cobalt/android/BUILD.gn

@@ -186,8 +186,19 @@ shared_library("libcobalt_content_shell_content_view") {
     "//cobalt/cobalt_content_browser_client.h",
     "//cobalt/cobalt_main_delegate.cc",
     "//cobalt/cobalt_main_delegate.h",
+    "//cobalt/cobalt_shell.h",
+    "//cobalt/cobalt_shell.cc",
     "cobalt_library_loader.cc",
   ]
+
+  # Content shell Android parts
+  sources += [
+    "//cobalt/android/shell_manager.h",
+    "//cobalt/android/shell_manager.cc",
+    "//cobalt/android/shell_platform_delegate_android.cc",
+    "//cobalt/android/shell_web_contents_view_delegate_android.cc",
+  ]
+
   configs -= [ "//build/config/android:hide_all_but_jni_onload" ]
   configs += [ "//build/config/android:hide_all_but_jni" ]
 }

cobalt/android/shell_manager.cc

@@ -0,0 +1,77 @@
+// Copyright 2012 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "cobalt/android/shell_manager.h"
+
+#include "base/android/jni_android.h"
+#include "base/android/jni_string.h"
+#include "base/android/scoped_java_ref.h"
+#include "base/functional/bind.h"
+#include "base/lazy_instance.h"
+#include "content/public/browser/web_contents.h"
+#include "content/shell/android/content_shell_jni_headers/ShellManager_jni.h"
+#include "cobalt/cobalt_shell.h"
+#include "content/shell/browser/shell_browser_context.h"
+#include "content/shell/browser/shell_content_browser_client.h"
+#include "url/gurl.h"
+
+// Note: Origin of this file is content/shell/shell_manager.cc from m114
+
+using base::android::JavaParamRef;
+using base::android::JavaRef;
+using base::android::ScopedJavaLocalRef;
+
+namespace {
+
+struct GlobalState {
+  GlobalState() {}
+  base::android::ScopedJavaGlobalRef<jobject> j_shell_manager;
+};
+
+base::LazyInstance<GlobalState>::DestructorAtExit g_global_state =
+    LAZY_INSTANCE_INITIALIZER;
+
+}  // namespace
+
+namespace cobalt {
+
+ScopedJavaLocalRef<jobject> CreateShellView(content::Shell* shell) {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  return content::Java_ShellManager_createShell(env,
+                                       g_global_state.Get().j_shell_manager,
+                                       reinterpret_cast<intptr_t>(shell));
+}
+
+void RemoveShellView(const JavaRef<jobject>& shell_view) {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  content::Java_ShellManager_removeShell(env, g_global_state.Get().j_shell_manager,
+                                shell_view);
+}
+
+} // namespace cobalt
+
+// Note: Below tracks generated Java code, which is currently generated
+// in content, not cobalt namespace.
+
+namespace content {
+
+static void JNI_ShellManager_Init(JNIEnv* env,
+                                  const JavaParamRef<jobject>& obj) {
+  g_global_state.Get().j_shell_manager.Reset(obj);
+}
+
+void JNI_ShellManager_LaunchShell(JNIEnv* env,
+                                  const JavaParamRef<jstring>& jurl) {
+  content::ShellBrowserContext* browserContext =
+      content::ShellContentBrowserClient::Get()->browser_context();
+  GURL url(base::android::ConvertJavaStringToUTF8(env, jurl));
+  cobalt::CobaltShell::CreateNewWindow(browserContext, url, nullptr, gfx::Size());
+}
+
+void DestroyShellManager() {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  content::Java_ShellManager_destroy(env, g_global_state.Get().j_shell_manager);
+}
+
+}  // namespace cobalt

cobalt/android/shell_manager.h

@@ -0,0 +1,46 @@
+// Copyright 2012 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CONTENT_SHELL_ANDROID_SHELL_MANAGER_H_
+#define CONTENT_SHELL_ANDROID_SHELL_MANAGER_H_
+
+#include <jni.h>
+
+#include "base/android/jni_android.h"
+#include "base/android/scoped_java_ref.h"
+
+// Note: Origin of this file is content/shell/shell_manager.h from m114
+
+namespace content {
+class Shell;
+}
+
+namespace cc {
+class Layer;
+}
+
+namespace cobalt {
+
+// Creates an Android specific shell view, which is our version of a shell
+// window.  This view holds the controls and content views necessary to
+// render a shell window.  Returns the java object representing the shell view.
+// object.
+base::android::ScopedJavaLocalRef<jobject> CreateShellView(content::Shell* shell);
+
+// Removes a previously created shell view.
+void RemoveShellView(const base::android::JavaRef<jobject>& shell_view);
+
+}
+namespace content {
+
+void ShellAttachLayer(cc::Layer* layer);
+void ShellRemoveLayer(cc::Layer* layer);
+
+// Destroys the ShellManager on app exit. Must not use the above functions
+// after this is called.
+void DestroyShellManager();
+
+}  // namespace content
+
+#endif  // CONTENT_SHELL_ANDROID_SHELL_MANAGER_H_

cobalt/android/shell_platform_delegate_android.cc

@@ -0,0 +1,165 @@
+// Copyright 2020 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "content/shell/browser/shell_platform_delegate.h"
+
+#include <jni.h>
+
+#include "base/android/jni_string.h"
+#include "base/android/scoped_java_ref.h"
+#include "base/command_line.h"
+#include "base/containers/contains.h"
+#include "base/notreached.h"
+#include "base/strings/string_piece.h"
+#include "cobalt/android/shell_manager.h"
+#include "content/public/browser/render_widget_host_view.h"
+#include "content/public/browser/web_contents.h"
+#include "content/public/common/content_switches.h"
+#include "content/shell/android/content_shell_jni_headers/Shell_jni.h"
+#include "content/shell/browser/shell.h"
+
+using base::android::AttachCurrentThread;
+using base::android::ConvertUTF8ToJavaString;
+using base::android::JavaParamRef;
+using base::android::ScopedJavaLocalRef;
+
+namespace content {
+
+struct ShellPlatformDelegate::ShellData {
+  base::android::ScopedJavaGlobalRef<jobject> java_object;
+};
+
+struct ShellPlatformDelegate::PlatformData {};
+
+ShellPlatformDelegate::ShellPlatformDelegate() = default;
+
+void ShellPlatformDelegate::Initialize(const gfx::Size& default_window_size) {
+  // |platform_| is not used on this platform.
+}
+
+ShellPlatformDelegate::~ShellPlatformDelegate() {
+  content::DestroyShellManager();
+}
+
+void ShellPlatformDelegate::CreatePlatformWindow(
+    Shell* shell,
+    const gfx::Size& initial_size) {
+  DCHECK(!base::Contains(shell_data_map_, shell));
+  ShellData& shell_data = shell_data_map_[shell];
+
+  shell_data.java_object.Reset(cobalt::CreateShellView(shell));
+}
+
+void ShellPlatformDelegate::CleanUp(Shell* shell) {
+  JNIEnv* env = AttachCurrentThread();
+  DCHECK(base::Contains(shell_data_map_, shell));
+  ShellData& shell_data = shell_data_map_[shell];
+
+  cobalt::RemoveShellView(shell_data.java_object);
+
+  if (!shell_data.java_object.is_null())
+    Java_Shell_onNativeDestroyed(env, shell_data.java_object);
+
+  shell_data_map_.erase(shell);
+}
+
+void ShellPlatformDelegate::SetContents(Shell* shell) {
+  JNIEnv* env = AttachCurrentThread();
+  DCHECK(base::Contains(shell_data_map_, shell));
+  ShellData& shell_data = shell_data_map_[shell];
+
+  Java_Shell_initFromNativeTabContents(
+      env, shell_data.java_object, shell->web_contents()->GetJavaWebContents());
+}
+
+void ShellPlatformDelegate::ResizeWebContent(Shell* shell,
+                                             const gfx::Size& content_size) {
+  shell->web_contents()->GetRenderWidgetHostView()->SetSize(content_size);
+}
+
+void ShellPlatformDelegate::EnableUIControl(Shell* shell,
+                                            UIControl control,
+                                            bool is_enabled) {
+  JNIEnv* env = AttachCurrentThread();
+  DCHECK(base::Contains(shell_data_map_, shell));
+  ShellData& shell_data = shell_data_map_[shell];
+
+  if (shell_data.java_object.is_null())
+    return;
+  Java_Shell_enableUiControl(env, shell_data.java_object, control, is_enabled);
+}
+
+void ShellPlatformDelegate::SetAddressBarURL(Shell* shell, const GURL& url) {
+  JNIEnv* env = AttachCurrentThread();
+  DCHECK(base::Contains(shell_data_map_, shell));
+  ShellData& shell_data = shell_data_map_[shell];
+
+  ScopedJavaLocalRef<jstring> j_url = ConvertUTF8ToJavaString(env, url.spec());
+  Java_Shell_onUpdateUrl(env, shell_data.java_object, j_url);
+}
+
+void ShellPlatformDelegate::SetIsLoading(Shell* shell, bool loading) {
+  JNIEnv* env = AttachCurrentThread();
+  DCHECK(base::Contains(shell_data_map_, shell));
+  ShellData& shell_data = shell_data_map_[shell];
+
+  Java_Shell_setIsLoading(env, shell_data.java_object, loading);
+}
+
+void ShellPlatformDelegate::SetTitle(Shell* shell,
+                                     const std::u16string& title) {}
+
+void ShellPlatformDelegate::MainFrameCreated(Shell* shell) {}
+
+bool ShellPlatformDelegate::DestroyShell(Shell* shell) {
+  return false;  // Shell destroys itself.
+}
+
+void ShellPlatformDelegate::ToggleFullscreenModeForTab(
+    Shell* shell,
+    WebContents* web_contents,
+    bool enter_fullscreen) {
+  JNIEnv* env = AttachCurrentThread();
+  DCHECK(base::Contains(shell_data_map_, shell));
+  ShellData& shell_data = shell_data_map_[shell];
+
+  Java_Shell_toggleFullscreenModeForTab(env, shell_data.java_object,
+                                        enter_fullscreen);
+}
+
+bool ShellPlatformDelegate::IsFullscreenForTabOrPending(
+    Shell* shell,
+    const WebContents* web_contents) const {
+  JNIEnv* env = AttachCurrentThread();
+  DCHECK(base::Contains(shell_data_map_, shell));
+  const ShellData& shell_data = shell_data_map_.find(shell)->second;
+
+  return Java_Shell_isFullscreenForTabOrPending(env, shell_data.java_object);
+}
+
+void ShellPlatformDelegate::SetOverlayMode(Shell* shell,
+                                           bool use_overlay_mode) {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  DCHECK(base::Contains(shell_data_map_, shell));
+  ShellData& shell_data = shell_data_map_[shell];
+
+  return Java_Shell_setOverlayMode(env, shell_data.java_object,
+                                   use_overlay_mode);
+}
+
+void ShellPlatformDelegate::LoadProgressChanged(Shell* shell, double progress) {
+  JNIEnv* env = AttachCurrentThread();
+  DCHECK(base::Contains(shell_data_map_, shell));
+  ShellData& shell_data = shell_data_map_[shell];
+
+  Java_Shell_onLoadProgressChanged(env, shell_data.java_object, progress);
+}
+
+// static
+void JNI_Shell_CloseShell(JNIEnv* env, jlong shellPtr) {
+  Shell* shell = reinterpret_cast<Shell*>(shellPtr);
+  shell->Close();
+}
+
+}  // namespace content

cobalt/android/shell_web_contents_view_delegate_android.cc

@@ -0,0 +1,34 @@
+// Copyright 2013 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "content/shell/browser/shell_web_contents_view_delegate.h"
+
+#include <memory>
+
+#include "base/command_line.h"
+#include "content/public/browser/context_menu_params.h"
+#include "content/public/browser/web_contents.h"
+#include "content/shell/browser/shell_web_contents_view_delegate_creator.h"
+
+namespace content {
+
+std::unique_ptr<WebContentsViewDelegate> CreateShellWebContentsViewDelegate(
+    WebContents* web_contents) {
+  return std::make_unique<ShellWebContentsViewDelegate>(web_contents);
+}
+
+ShellWebContentsViewDelegate::ShellWebContentsViewDelegate(
+    WebContents* web_contents)
+    : web_contents_(web_contents) {
+  DCHECK(web_contents_);  // Avoids 'unused private field' build error.
+}
+
+ShellWebContentsViewDelegate::~ShellWebContentsViewDelegate() {
+}
+
+void ShellWebContentsViewDelegate::ShowContextMenu(
+    RenderFrameHost& render_frame_host,
+    const ContextMenuParams& params) {}
+
+}  // namespace content

cobalt/cobalt_shell.cc

@@ -0,0 +1,10 @@
+#include "cobalt/cobalt_shell.h"
+
+namespace cobalt {
+
+// Placeholder for a WebContentsObserver override
+void CobaltShell::PrimaryMainDocumentElementAvailable() {
+    LOG(INFO) << "Cobalt::PrimaryMainDocumentElementAvailable";
+}
+
+}

cobalt/cobalt_shell.h

@@ -0,0 +1,15 @@
+#ifndef COBALT_COBALT_SHELL_H
+#define COBALT_COBALT_SHELL_H
+
+#include "content/shell/browser/shell.h"
+
+namespace cobalt {
+
+class CobaltShell : public content::Shell {
+    // WebContentsObserver
+    void PrimaryMainDocumentElementAvailable() override;
+};
+
+} // namespace cobalt
+
+#endif // COBALT_COBALT_SHELL_H

content/shell/BUILD.gn

@@ -192,12 +192,14 @@ static_library("content_shell_lib") {
   ]
 
   if (is_android) {
+    if (!is_cobalt) {
     sources += [
       "android/shell_manager.cc",
       "android/shell_manager.h",
       "browser/shell_platform_delegate_android.cc",
       "browser/shell_web_contents_view_delegate_android.cc",
     ]
+    }
   }
 
   if (is_mac) {