add support for rich text selections

chrome/browser/resources/chromeos/chromevox/cvox2/background/editing_test.extjs

 // 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 test fixture.
 GEN_INCLUDE(['../../testing/chromevox_next_e2e_test_base.js',
              '../../testing/assert_additions.js']);
 
 GEN_INCLUDE(['../../testing/mock_feedback.js']);
 
@@ skipping 536 matching lines @@
 
     // On different node, with multi-static text line.
     e1 = new editing.EditableLine(world, 1, world, 1);
     assertTrue(e1.equals(e2));
 
     // Another mix of lines.
     e2 = new editing.EditableLine(thisIsATest, 9, thisIsATest, 9);
     assertFalse(e1.equals(e2));
   });
 });
+
+TEST_F('EditingTest', 'EditableLineStrictEquality', function() {
+  this.runWithLoadedTree(function() {/*!
+    <div contenteditable role="textbox">
+      <p style="word-spacing:100000px">this is a test</p>
+      <p>hello <b>world</b></p>
+    </div>
+  */}, function(root) {
+    var thisIsATest = root.findAll({role: RoleType.PARAGRAPH})[0].firstChild;
+    var hello = root.findAll({role: RoleType.PARAGRAPH})[1].firstChild;
+    var world = root.findAll({role: RoleType.PARAGRAPH})[1].lastChild;
+
+    // The same position -- sanity check.
+    var e1 = new editing.EditableLine(thisIsATest, 0, thisIsATest, 0);
+    assertEquals('this ', e1.text);
+    assertTrue(e1.equalsStrict(e1));
+
+    // Offset into the same soft line.
+    var e2 = new editing.EditableLine(thisIsATest, 1, thisIsATest, 1);
+    assertFalse(e1.equalsStrict(e2));
+
+    // Boundary.
+    e2 = new editing.EditableLine(thisIsATest, 4, thisIsATest, 4);
+    assertFalse(e1.equalsStrict(e2));
+
+    // Offsets into different soft lines.
+    e2 = new editing.EditableLine(thisIsATest, 5, thisIsATest, 5);
+    assertEquals('is ', e2.text);
+    assertFalse(e1.equalsStrict(e2));
+
+    // Sanity check; second soft line.
+    assertTrue(e2.equalsStrict(e2));
+
+    // Different offsets into second soft line.
+    e1 = new editing.EditableLine(thisIsATest, 6, thisIsATest, 6);
+    assertFalse(e1.equalsStrict(e2));
+
+    // Boundary.
+    e1 = new editing.EditableLine(thisIsATest, 7, thisIsATest, 7);
+    assertFalse(e1.equalsStrict(e2));
+
+    // Cross into new paragraph.
+    e2 = new editing.EditableLine(hello, 0, hello, 0);
+    assertEquals('hello world', e2.text);
+    assertFalse(e1.equalsStrict(e2));
+
+    // On same node, with multi-static text line.
+    e1 = new editing.EditableLine(hello, 1, hello, 1);
+    assertFalse(e1.equalsStrict(e2));
+
+    // On same node, with multi-static text line; boundary.
+    e1 = new editing.EditableLine(hello, 5, hello, 5);
+    assertFalse(e1.equalsStrict(e2));
+  });
+});
+
+TEST_F('EditingTest', 'EditableLineBaseLineAnchorOrFocus', function() {
+  this.runWithLoadedTree(function() {/*!
+    <div contenteditable role="textbox">
+      <p style="word-spacing:100000px">this is a test</p>
+      <p>hello <b>world</b></p>
+    </div>
+  */}, function(root) {
+    var thisIsATest = root.findAll({role: RoleType.PARAGRAPH})[0].firstChild;
+    var hello = root.findAll({role: RoleType.PARAGRAPH})[1].firstChild;
+    var world = root.findAll({role: RoleType.PARAGRAPH})[1].lastChild;
+
+    // The same position -- sanity check.
+    var e1 = new editing.EditableLine(thisIsATest, 0, thisIsATest, 0, true);
+    assertEquals('this ', e1.text);
+
+    // Offsets into different soft lines; base on focus (default).
+    e1 = new editing.EditableLine(thisIsATest, 0, thisIsATest, 6);
+    assertEquals('is ', e1.text);
+    // Notice that the offset is truncated at the beginning of the line.
+    assertEquals(0, e1.startOffset);
+// Notice that the end offset is properly retained.

[dmazzoni, 2017/06/21 06:22:08]

nit: indent

[David Tseng, 2017/06/21 16:58:28]

Done.

+    assertEquals(1, e1.endOffset);
+
+    // Offsets into different soft lines; base on anchor.
+    e1 = new editing.EditableLine(thisIsATest, 0, thisIsATest, 6, true);
+    assertEquals('this ', e1.text);
+    assertEquals(0, e1.startOffset);
+// Notice that the end offset is truncated up to the end of line.

[dmazzoni, 2017/06/21 06:22:08]

nit: indent

[David Tseng, 2017/06/21 16:58:28]

Done (hmm git cl format didn't catch this).

+    assertEquals(5, e1.endOffset);
+
+    // Across paragraph dselection with base line on focus.

[dmazzoni, 2017/06/21 06:22:08]

nit: dselection -> selection, and again below

[David Tseng, 2017/06/21 16:58:28]

Done.

+    e1 = new editing.EditableLine(thisIsATest, 5, hello, 2);
+    assertEquals('hello world', e1.text);
+    assertEquals(0, e1.startOffset);
+    assertEquals(2, e1.endOffset);
+
+    // Across paragraph dselection with base line on anchor.
+    e1 = new editing.EditableLine(thisIsATest, 5, hello, 2, true);
+    assertEquals('is ', e1.text);
+    assertEquals(0, e1.startOffset);
+    assertEquals(3, e1.endOffset);
+  })
+});