Add picker view for Web Share Target.

chrome/browser/webshare/share_service_impl.cc

 // Copyright 2016 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/webshare/share_service_impl.h"
 
 #include <algorithm>
 #include <functional>
 #include <utility>
 
 #include "base/strings/string_util.h"
+#include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_commands.h"
+#include "chrome/browser/ui/browser_dialogs.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/browser_tabstrip.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "mojo/public/cpp/bindings/strong_binding.h"
 #include "net/base/escape.h"
 
 namespace {
 
 // Determines whether a character is allowed in a URL template placeholder.
 bool IsIdentifier(char c) {
@@ skipping 80 matching lines @@
     // Error: Saw open that was never closed.
     return false;
   }
   split_template.push_back(url_template.substr(
       start_index_to_copy, url_template.size() - start_index_to_copy));
 
   *url_template_filled = JoinString(split_template);
   return true;
 }
 
+void ShareServiceImpl::ShowPickerDialog(
+    const std::vector<base::string16>& targets,
+    const base::Callback<void(SharePickerResult)>& callback) {
+  // TODO(mgiuca): Get the browser window as |parent_window|.
+#if defined(OS_LINUX) || defined(OS_WIN)
+  chrome::ShowWebShareTargetPickerDialog(nullptr /* parent_window */, targets,
+                                         callback);
+#else
+  callback.Run(SharePickerResult::CANCEL);
+#endif
+}
+
 void ShareServiceImpl::OpenTargetURL(const GURL& target_url) {
 // TODO(constantina): Prevent this code from being run/compiled in android.
 #if defined(OS_LINUX) || defined(OS_WIN)
   Browser* browser = BrowserList::GetInstance()->GetLastActive();
   chrome::AddTabAt(browser, target_url,
                    browser->tab_strip_model()->active_index() + 1, true);
 #endif
 }
 
 void ShareServiceImpl::Share(const std::string& title,
                              const std::string& text,
                              const GURL& share_url,
                              const ShareCallback& callback) {
+  // TODO(constantina): Replace hard-coded name with the registered target list.
+  constexpr char kTargetName[] = "Web Share Target Test App";
+  std::vector<base::string16> targets{base::ASCIIToUTF16(kTargetName)};
+
+  ShowPickerDialog(targets, base::Bind(&ShareServiceImpl::OnPickerClosed,
+                                       base::Unretained(this), title, text,
+                                       share_url, callback));
+}
+
+void ShareServiceImpl::OnPickerClosed(const std::string& title,
+                                      const std::string& text,
+                                      const GURL& share_url,
+                                      const ShareCallback& callback,
+                                      SharePickerResult result) {
+  if (result == SharePickerResult::CANCEL) {
+    callback.Run(base::Optional<std::string>("Share was cancelled"));
+    return;
+  }
+
   // TODO(constantina): replace hard-coded URL with one from user-chosen site.
   constexpr char kUrlBase[] = "https://wicg.github.io/web-share-target/";
   constexpr char kUrlTemplate[] =
       "demos/sharetarget.html?title={title}&text={text}&url={url}";
 
   std::string url_template_filled;
   if (!ReplacePlaceholders(kUrlTemplate, title, text, share_url,
                            &url_template_filled)) {
     callback.Run(base::Optional<std::string>(
         "Error: unable to replace placeholders in url template"));
     return;
   }
 
   GURL target_url(kUrlBase + url_template_filled);
   if (!target_url.is_valid()) {
     callback.Run(base::Optional<std::string>(
         "Error: url of share target is not a valid url."));
     return;
   }
   OpenTargetURL(target_url);
 
   callback.Run(base::nullopt);
 }