Upstream the Android port find-in-page feature.

chrome/browser/android/chrome_web_contents_delegate_android.cc

 // 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 file.
 
 #include "chrome/browser/android/chrome_web_contents_delegate_android.h"
 
 #include "base/android/jni_android.h"
 #include "chrome/browser/file_select_helper.h"
+#include "chrome/browser/ui/find_bar/find_match_rects_details.h"
+#include "chrome/browser/ui/find_bar/find_notification_details.h"
+#include "chrome/browser/ui/find_bar/find_tab_helper.h"
+#include "chrome/browser/ui/tab_contents/tab_contents.h"
+#include "chrome/common/chrome_notification_types.h"
+#include "content/public/browser/notification_details.h"
+#include "content/public/browser/notification_source.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/file_chooser_params.h"
+#include "jni/ChromeWebContentsDelegateAndroid_jni.h"
+#include "ui/gfx/rect.h"
+#include "ui/gfx/rect_f.h"
 
 using base::android::AttachCurrentThread;
 using base::android::GetClass;
 using base::android::ScopedJavaLocalRef;
 using content::FileChooserParams;
 using content::WebContents;
 
+namespace {
+
+// Convenience method to create Android rects.
+// RectType should be either gfx::Rect or gfx::RectF.
+template <typename RectType>
+ScopedJavaLocalRef<jobject> CreateAndroidRect(
+    JNIEnv* env,
+    const ScopedJavaLocalRef<jclass>& clazz,
+    const jmethodID& constructor,
+    const RectType& rect) {
+
+  ScopedJavaLocalRef<jobject> rect_object(
+      env,
+      env->NewObject(clazz.obj(),
+                     constructor,
+                     rect.x(),
+                     rect.y(),
+                     rect.right(),
+                     rect.bottom()));
+
+  DCHECK(!rect_object.is_null());
+  return rect_object;
+}
+
+}  // anonymous namespace
+
 namespace chrome {
 namespace android {
 
 ChromeWebContentsDelegateAndroid::ChromeWebContentsDelegateAndroid(JNIEnv* env,
                                                                    jobject obj)
     : WebContentsDelegateAndroid(env, obj) {
 }
 
 ChromeWebContentsDelegateAndroid::~ChromeWebContentsDelegateAndroid() {
+  notification_registrar_.RemoveAll();
+}
+
+// Register native methods.
+bool RegisterChromeWebContentsDelegateAndroid(JNIEnv* env) {
+  return RegisterNativesImpl(env);
 }
 
 void ChromeWebContentsDelegateAndroid::RunFileChooser(
     WebContents* web_contents,
     const FileChooserParams& params) {
   FileSelectHelper::RunFileChooser(web_contents, params);
 }
 
+void ChromeWebContentsDelegateAndroid::CloseContents(
+    WebContents* web_contents) {
+  // Prevent dangling registrations assigned to closed web contents.
+  if (notification_registrar_.IsRegistered(this,
+      chrome::NOTIFICATION_FIND_RESULT_AVAILABLE,
+      content::Source<WebContents>(web_contents))) {
+    notification_registrar_.Remove(this,
+        chrome::NOTIFICATION_FIND_RESULT_AVAILABLE,
+        content::Source<WebContents>(web_contents));
+  }
+
+  if (notification_registrar_.IsRegistered(this,
+      chrome::NOTIFICATION_FIND_MATCH_RECTS_AVAILABLE,
+      content::Source<WebContents>(web_contents))) {
+    notification_registrar_.Remove(this,
+        chrome::NOTIFICATION_FIND_MATCH_RECTS_AVAILABLE,
+        content::Source<WebContents>(web_contents));
+  }
+
+  WebContentsDelegateAndroid::CloseContents(web_contents);
+}
+
+void ChromeWebContentsDelegateAndroid::Observe(
+    int type,
+    const content::NotificationSource& source,
+    const content::NotificationDetails& details) {
+  switch (type) {
+    case chrome::NOTIFICATION_FIND_RESULT_AVAILABLE:
+      OnFindResultAvailable(content::Source<WebContents>(source).ptr(),

[jam, 2012/09/04 16:39:09]

nit: this indentation isn't according to style guide, i.e. the start of
parameters on each line has to be at the same column. also above and below

[Leandro Graciá Gil, 2012/09/04 18:25:50]

Done.

+          content::Details<FindNotificationDetails>(details).ptr());
+      break;
+    case chrome::NOTIFICATION_FIND_MATCH_RECTS_AVAILABLE:
+      OnFindMatchRectsAvailable(content::Source<WebContents>(source).ptr(),
+          content::Details<FindMatchRectsDetails>(details).ptr());
+      break;
+    default:
+      NOTREACHED() << "Unexpected notification: " << type;
+      break;
+  }
+}
+
+void ChromeWebContentsDelegateAndroid::FindReply(
+    WebContents* web_contents,
+    int request_id,
+    int number_of_matches,
+    const gfx::Rect& selection_rect,
+    int active_match_ordinal,
+    bool final_update) {
+  TabContents* tab_contents = TabContents::FromWebContents(web_contents);
+  if (!tab_contents || !tab_contents->find_tab_helper())

[jam, 2012/09/04 16:39:09]

will this condition really happen?

[Leandro Graciá Gil, 2012/09/04 18:25:50]

Good catch. We actually removed some of these checks during the downstream
review, but this one seems to have slipped in.

+    return;
+
+  if (!notification_registrar_.IsRegistered(this,
+      chrome::NOTIFICATION_FIND_RESULT_AVAILABLE,
+      content::Source<WebContents>(web_contents))) {
+    notification_registrar_.Add(this,
+        chrome::NOTIFICATION_FIND_RESULT_AVAILABLE,
+        content::Source<WebContents>(web_contents));
+  }
+
+  tab_contents->find_tab_helper()->HandleFindReply(request_id,
+                                                   number_of_matches,
+                                                   selection_rect,
+                                                   active_match_ordinal,
+                                                   final_update);
+}
+
+void ChromeWebContentsDelegateAndroid::OnFindResultAvailable(
+    WebContents* web_contents,
+    const FindNotificationDetails* find_result) {
+  DCHECK(web_contents);

[jam, 2012/09/04 16:39:09]

please get rid of these dchecks. if they're null, a crash will be just as
useful. littering the beginning of functions with dchecks isn't that helpful in
practice

[Leandro Graciá Gil, 2012/09/04 18:25:50]

Done.

+  DCHECK(find_result);
+
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> obj = GetJavaDelegate(env);
+  if (obj.is_null())
+    return;
+
+  // Create the selection rect.
+  ScopedJavaLocalRef<jclass> rect_clazz =
+      GetClass(env, "android/graphics/Rect");
+
+  jmethodID rect_constructor =
+      GetMethodID(env, rect_clazz, "<init>", "(IIII)V");
+
+  ScopedJavaLocalRef<jobject> selection_rect = CreateAndroidRect(
+      env, rect_clazz, rect_constructor, find_result->selection_rect());
+
+  // Create the details object.
+  ScopedJavaLocalRef<jclass> details_clazz =
+      GetClass(env, "org/chromium/chrome/browser/FindNotificationDetails");
+
+  jmethodID details_constructor = GetMethodID(env, details_clazz, "<init>",
+                                              "(ILandroid/graphics/Rect;IZ)V");
+
+  ScopedJavaLocalRef<jobject> details_object(
+      env,
+      env->NewObject(details_clazz.obj(),
+                     details_constructor,
+                     find_result->number_of_matches(),
+                     selection_rect.obj(),
+                     find_result->active_match_ordinal(),
+                     find_result->final_update()));
+  DCHECK(!details_object.is_null());
+
+  Java_ChromeWebContentsDelegateAndroid_onFindResultAvailable(
+      env,
+      obj.obj(),
+      details_object.obj());
+}
+
+void ChromeWebContentsDelegateAndroid::GetFindMatchRectsReply(
+    WebContents* web_contents,
+    int version,
+    const std::vector<gfx::RectF>& rects,
+    const gfx::RectF& active_rect) {
+  TabContents* tab_contents = TabContents::FromWebContents(web_contents);
+  if (!tab_contents || !tab_contents->find_tab_helper())
+    return;
+
+  if (!notification_registrar_.IsRegistered(this,
+      chrome::NOTIFICATION_FIND_MATCH_RECTS_AVAILABLE,
+      content::Source<WebContents>(web_contents))) {
+    notification_registrar_.Add(this,
+        chrome::NOTIFICATION_FIND_MATCH_RECTS_AVAILABLE,
+        content::Source<WebContents>(web_contents));
+  }
+
+  tab_contents->find_tab_helper()->HandleGetFindMatchRectsReply(
+      version, rects, active_rect);
+}
+
+void ChromeWebContentsDelegateAndroid::OnFindMatchRectsAvailable(
+    WebContents* web_contents,
+    const FindMatchRectsDetails* match_rects) {
+  DCHECK(web_contents);
+  DCHECK(match_rects);
+
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> obj = GetJavaDelegate(env);
+  if (obj.is_null())
+    return;
+
+  // Create the rects.
+  ScopedJavaLocalRef<jclass> rect_clazz =
+      GetClass(env, "android/graphics/RectF");
+
+  jmethodID rect_constructor =
+      GetMethodID(env, rect_clazz, "<init>", "(FFFF)V");
+
+  ScopedJavaLocalRef<jobjectArray> rects(env, env->NewObjectArray(
+      match_rects->rects().size(), rect_clazz.obj(), NULL));
+
+  for (size_t i = 0; i < match_rects->rects().size(); ++i) {
+    env->SetObjectArrayElement(
+        rects.obj(), i,
+        CreateAndroidRect(env,
+                          rect_clazz,
+                          rect_constructor,
+                          match_rects->rects()[i]).obj());
+  }
+
+  ScopedJavaLocalRef<jobject> active_rect = CreateAndroidRect(
+      env, rect_clazz, rect_constructor, match_rects->active_rect());
+
+  // Create the details object.
+  ScopedJavaLocalRef<jclass> details_clazz =
+      GetClass(env, "org/chromium/chrome/browser/FindMatchRectsDetails");
+
+  jmethodID details_constructor = GetMethodID(env, details_clazz, "<init>",
+      "(I[Landroid/graphics/RectF;Landroid/graphics/RectF;)V");
+
+  ScopedJavaLocalRef<jobject> details_object(
+      env,
+      env->NewObject(details_clazz.obj(),
+                     details_constructor,
+                     match_rects->version(),
+                     rects.obj(),
+                     active_rect.obj()));
+  DCHECK(!details_object.is_null());
+
+  Java_ChromeWebContentsDelegateAndroid_onFindMatchRectsAvailable(
+      env,
+      obj.obj(),
+      details_object.obj());
+}
+
 }  // namespace android
 }  // namespace chrome