FilesApp: enter check select mode for select-all files

Currently we only enter check select mode if 2 or more files are
selected as part of select-all.  This is now changed so that
we always enter check select mode even if only a single file
is selected.

Bug: 903253
Change-Id: I15d05ea19570d7c83cfd77f20afa1370301b8b2a
Reviewed-on: https://chromium-review.googlesource.com/c/1343586
Commit-Queue: Joel Hockey <joelhockey@chromium.org>
Reviewed-by: Stuart Langley <slangley@chromium.org>
Cr-Commit-Position: refs/heads/master@{#609630}

ui/file_manager/file_manager/foreground/js/file_manager_commands.js

@@ -774,6 +774,7 @@ CommandHandler.COMMANDS_['select-all'] = /** @type {Command} */ ({
    * @param {!CommandHandlerDeps} fileManager CommandHandlerDeps to use.
    */
   execute: function(event, fileManager) {
+    fileManager.directoryModel.getFileListSelection().setCheckSelectMode(true);
     fileManager.directoryModel.getFileListSelection().selectAll();
   },
   /**

ui/file_manager/file_manager/foreground/js/ui/file_table_list.js

@@ -460,6 +460,7 @@ filelist.handleKeyDown = function(e) {
   // Ctrl/Meta+A
   if (sm.multiple && e.keyCode == 65 &&
       (cr.isMac && e.metaKey || !cr.isMac && e.ctrlKey)) {
+    sm.setCheckSelectMode(true);
     sm.selectAll();
     e.preventDefault();
     return;

ui/file_manager/file_manager/test/check_select.js

@@ -48,3 +48,56 @@ checkselect.testCancelCheckSelectModeAfterAction = (done) => {
         done();
       });
 };
+
+checkselect.testCheckSelectModeAfterSelectAllOneFile = (done) => {
+  const gearMenu = document.querySelector('#gear-menu');
+  const cancel = document.querySelector('#cancel-selection-button-wrapper');
+  const selectAll =
+      '#gear-menu:not([hidden]) #gear-menu-select-all:not([hidden])';
+
+  // Load a single file.
+  test.setupAndWaitUntilReady([test.ENTRIES.hello])
+      .then(() => {
+        // Click gear menu, ensure 'Select all' is shown.
+        assertTrue(test.fakeMouseClick('#gear-button'));
+        return test.waitForElement(selectAll);
+      })
+      .then(result => {
+        // Click 'Select all', gear menu now replaced with file context menu.
+        assertTrue(test.fakeMouseClick('#gear-menu-select-all'));
+        return test.repeatUntil(() => {
+          return getComputedStyle(gearMenu).opacity == 0 &&
+              getComputedStyle(cancel).display == 'block' ||
+              test.pending('waiting for check select mode');
+        });
+      })
+      .then(result => {
+        // Cancel selection, ensure no items selected.
+        assertTrue(test.fakeMouseClick('#cancel-selection-button'));
+        return test.repeatUntil(() => {
+          return document.querySelectorAll('#file-list li[selected]').length ==
+              0 ||
+              test.pending('waiting for no files selected');
+        });
+      })
+      .then(result => {
+        // 'Ctrl+a' to select all.
+        assertTrue(test.fakeKeyDown('#file-list', 'a', true, false, false));
+        return test.repeatUntil(() => {
+          return getComputedStyle(cancel).display == 'block' ||
+              test.pending('waiting for check select mode');
+        });
+      })
+      .then(result => {
+        // Cancel selection, ensure no items selected.
+        assertTrue(test.fakeMouseClick('#cancel-selection-button'));
+        return test.repeatUntil(() => {
+          return document.querySelectorAll('#file-list li[selected]').length ==
+              0 ||
+              test.pending('waiting for no files selected');
+        });
+      })
+      .then(result => {
+        done();
+      });
+};
\ No newline at end of file