Bug 1254070 - inspector: trigger autocomplete if nextchar is not a word character;r=gl

For the style attribute CSS autocompletion, suggestions will now be provided
when the character after the caret is a non-word character. As opposed to the
current behavior where suggestions would only be displayed if the next character
was the end of the input or a space.

This allows to show suggestions when the user's caret is next to ";" or '"', which
can frequently happen when editing style attributes.

MozReview-Commit-ID: Bvz6koikbqR

--HG--
extra : rebase_source : fc4978fdd14bcaf99d3286e7750c005e8d11d96a
extra : amend_source : 33cbbee2523bbc89fa2d5d09297666fc3256045f

devtools/client/inspector/markup/test/browser.ini

@@ -64,6 +64,7 @@ skip-if = e10s # scratchpad.xul is not loading in e10s window
 subsuite = clipboard
 [browser_markup_css_completion_style_attribute_01.js]
 [browser_markup_css_completion_style_attribute_02.js]
+[browser_markup_css_completion_style_attribute_03.js]
 [browser_markup_dragdrop_autoscroll.js]
 [browser_markup_dragdrop_distance.js]
 [browser_markup_dragdrop_draggable.js]

devtools/client/inspector/markup/test/browser_markup_css_completion_style_attribute_01.js

@@ -70,7 +70,6 @@ const TEST_DATA = [
 ];
 
 add_task(function* () {
-  info("Opening the inspector on the test URL");
   let {inspector} = yield openInspectorForURL(TEST_URL);
 
   yield runStyleAttributeAutocompleteTests(inspector, TEST_DATA);

devtools/client/inspector/markup/test/browser_markup_css_completion_style_attribute_02.js

@@ -98,7 +98,6 @@ const TEST_DATA_INNER = [
 ];
 
 add_task(function* () {
-  info("Opening the inspector on the test URL");
   let {inspector} = yield openInspectorForURL(TEST_URL);
 
   yield runStyleAttributeAutocompleteTests(inspector, TEST_DATA_DOUBLE);

devtools/client/inspector/markup/test/browser_markup_css_completion_style_attribute_03.js

@@ -0,0 +1,54 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+ http://creativecommons.org/publicdomain/zero/1.0/ */
+/* import-globals-from helper_style_attr_test_runner.js */
+
+"use strict";
+
+// Test CSS autocompletion of the style attribute can be triggered when the
+// caret is before a non-word character.
+
+loadHelperScript("helper_style_attr_test_runner.js");
+
+const TEST_URL = URL_ROOT + "doc_markup_edit.html";
+
+// test data format :
+//  [
+//    what key to press,
+//    expected input box value after keypress,
+//    expected input.selectionStart,
+//    expected input.selectionEnd,
+//    is popup expected to be open ?
+//  ]
+const TEST_DATA = [
+  ["s", "s", 1, 1, false],
+  ["t", "st", 2, 2, false],
+  ["y", "sty", 3, 3, false],
+  ["l", "styl", 4, 4, false],
+  ["e", "style", 5, 5, false],
+  ["=", "style=", 6, 6, false],
+  ["\"", "style=\"", 7, 7, false],
+  ["\"", "style=\"\"", 8, 8, false],
+  ["VK_LEFT", "style=\"\"", 7, 7, false],
+  ["c", "style=\"color\"", 8, 12, true],
+  ["o", "style=\"color\"", 9, 12, true],
+  ["VK_RIGHT", "style=\"color\"", 12, 12, false],
+  [":", "style=\"color:aliceblue\"", 13, 22, true],
+  ["b", "style=\"color:beige\"", 14, 18, true],
+  ["VK_RIGHT", "style=\"color:beige\"", 18, 18, false],
+  [";", "style=\"color:beige;\"", 19, 19, false],
+  [";", "style=\"color:beige;;\"", 20, 20, false],
+  ["VK_LEFT", "style=\"color:beige;;\"", 19, 19, false],
+  ["p", "style=\"color:beige;padding;\"", 20, 26, true],
+  ["VK_RIGHT", "style=\"color:beige;padding;\"", 26, 26, false],
+  [":", "style=\"color:beige;padding:calc;\"", 27, 31, true],
+  ["0", "style=\"color:beige;padding:0;\"", 28, 28, false],
+  ["VK_RETURN", "style=\"color:beige;padding:0;\"",
+   -1, -1, false]
+];
+
+add_task(function* () {
+  let {inspector} = yield openInspectorForURL(TEST_URL);
+
+  yield runStyleAttributeAutocompleteTests(inspector, TEST_DATA);
+});

devtools/client/shared/inplace-editor.js

@@ -1297,15 +1297,19 @@ InplaceEditor.prototype = {
       if (query == null) {
         return;
       }
-      // If nothing is selected and there is a non-space character after the
-      // cursor, do not autocomplete.
+      // If nothing is selected and there is a word (\w) character after the cursor, do
+      // not autocomplete.
       if (input.selectionStart == input.selectionEnd &&
-          input.selectionStart < input.value.length &&
-          input.value.slice(input.selectionStart)[0] != " ") {
+          input.selectionStart < input.value.length) {
+        let nextChar = input.value.slice(input.selectionStart)[0];
+        // Check if the next character is a valid word character, no suggestion should be
+        // provided when preceeding a word.
+        if (/[\w-]/.test(nextChar)) {
           // This emit is mainly to make the test flow simpler.
           this.emit("after-suggest", "nothing to autocomplete");
           return;
         }
+      }
       let list = [];
       if (this.contentType == CONTENT_TYPES.CSS_PROPERTY) {
         list = this._getCSSPropertyList();