[Android] Prompt with infobar on filename conflict

chrome/browser/android/download/download_overwrite_infobar_delegate_native_initiated.cc

Index: chrome/browser/android/download/download_overwrite_infobar_delegate_native_initiated.cc
diff --git a/chrome/browser/android/download/download_overwrite_infobar_delegate_native_initiated.cc b/chrome/browser/android/download/download_overwrite_infobar_delegate_native_initiated.cc
new file mode 100644
index 0000000000000000000000000000000000000000..57d9485f2a518281c0a512fde3a91493677a01be
--- /dev/null
+++ b/chrome/browser/android/download/download_overwrite_infobar_delegate_native_initiated.cc
@@ -0,0 +1,93 @@
+// Copyright 2015 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/download/download_overwrite_infobar_delegate_native_initiated.h>
+#include "base/files/file_util.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/strings/stringprintf.h"
+#include "chrome/browser/infobars/infobar_service.h"
+#include "chrome/browser/ui/android/infobars/download_overwrite_infobar.h"
+#include "components/infobars/core/infobar.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/browser/web_contents.h"
+
+namespace chrome {
+namespace android {
+
+DownloadOverwriteInfoBarDelegateNativeInitiated::
+    ~DownloadOverwriteInfoBarDelegateNativeInitiated() {
+}
+
+// static
+void DownloadOverwriteInfoBarDelegateNativeInitiated::Create(
+    InfoBarService* infobar_service,
+    const base::FilePath& suggested_path,
+    const DownloadTargetDeterminerDelegate::FileSelectedCallback& callback) {
+  infobar_service->AddInfoBar(DownloadOverwriteInfoBar::CreateInfoBar(
+      make_scoped_ptr(new DownloadOverwriteInfoBarDelegateNativeInitiated(
+          suggested_path, callback))));
+}
+
+void DownloadOverwriteInfoBarDelegateNativeInitiated::OverwriteExistingFile() {
+  file_selected_callback_.Run(suggested_download_path_);
+}
+
+void DownloadOverwriteInfoBarDelegateNativeInitiated::CreateNewFile() {
+  content::BrowserThread::PostTask(
+      content::BrowserThread::FILE, FROM_HERE,
+      base::Bind(&DownloadOverwriteInfoBarDelegateNativeInitiated::
+                     CreateNewFileInternal,
+                 suggested_download_path_, file_selected_callback_));
+}
+
+std::string DownloadOverwriteInfoBarDelegateNativeInitiated::GetFileName()
+    const {

[Peter Kasting, 2015/02/25 06:24:57]

Nit: Arguable, but I think this wrapping would be better:

std::string
DownloadOverwriteInfoBarDelegateNativeInitiated::GetFileName() const {

Basically, const and override should go on the same line as the argument list
close paren unless there's no other way.

[Changwan Ryu, 2015/03/02 14:46:37]

Hmm... I tried it but git cl format reverses the change probably because only
'const' part went to the next line. I'll leave it as is for consistency.

+  return suggested_download_path_.BaseName().value();
+}
+
+std::string DownloadOverwriteInfoBarDelegateNativeInitiated::GetDirName()
+    const {
+  return suggested_download_path_.DirName().BaseName().value();
+}
+
+std::string DownloadOverwriteInfoBarDelegateNativeInitiated::GetDirFullPath()
+    const {
+  return suggested_download_path_.DirName().value();
+}
+
+DownloadOverwriteInfoBarDelegateNativeInitiated::
+    DownloadOverwriteInfoBarDelegateNativeInitiated(
+        const base::FilePath& suggested_download_path,
+        const DownloadTargetDeterminerDelegate::FileSelectedCallback&
+            file_selected_callback)
+    : suggested_download_path_(suggested_download_path),
+      file_selected_callback_(file_selected_callback) {
+}
+
+bool DownloadOverwriteInfoBarDelegateNativeInitiated::ShouldExpire(
+    const infobars::InfoBarDelegate::NavigationDetails& details) const {
+  return false;

[Peter Kasting, 2015/02/25 06:24:57]

Seems like method implementations like this which are common to both your
subclasses should just be implemented in the parent class.

[Changwan Ryu, 2015/03/02 14:46:36]

Done.

+}
+
+void DownloadOverwriteInfoBarDelegateNativeInitiated::InfoBarDismissed() {
+  file_selected_callback_.Run(base::FilePath());
+}
+
+void DownloadOverwriteInfoBarDelegateNativeInitiated::CreateNewFileInternal(
+    const base::FilePath& suggested_download_path,
+    const DownloadTargetDeterminerDelegate::FileSelectedCallback& callback) {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::FILE));
+  int uniquifier = base::GetUniquePathNumber(suggested_download_path,
+                                             base::FilePath::StringType());
+  base::FilePath new_path = suggested_download_path;
+  if (uniquifier > 0) {
+    new_path = suggested_download_path.InsertBeforeExtensionASCII(
+        base::StringPrintf(" (%d)", uniquifier));
+  }
+  content::BrowserThread::PostTask(content::BrowserThread::UI, FROM_HERE,
+                                   base::Bind(callback, new_path));
+}
+
+}  // namespace android
+}  // namespace chrome