Reland "The line offset must include the trailing spaces hang_width"

This is a reland of 327959fa6b34cce33d6ad95820132cbfa7d45c81 but with
some modifications to avoid regression like bug #1286299. Basically, I
don't adjust the line offset if the hang width causes overflow.

In r876293 we solved how we computed trailing spaces' width in text
using RTL direction. It's worth mentioning that we could implement this
change thanks to the first steps toward a full UAX#9 L1 implementation
that we started in https://crrev.com/c/2505486.

On the other hand, in the NGInlineLayoutAlgorithm::CreateLine function
we call to NGInlineLayoutStateStack::ComputeInlinePositions to compute
the line_box's inline_size and left offset of the text.

For some reason, I believe to make easier the implementation of some
alignment and justification related logc, we were ignoring the trailing
space hang_width for the box's inline_size, hence its offset in the
line.

However, in order to correctly place the Caret after a space insertion
it's needed to consider this hang_width, which is now properly computed
thanks to the change in r876293, as mentioned previously.

The bug described in the issue 1278559 is caused by this difference
between the caret position computed after the InsertTextCommand, which
as I said includes the new hang_width value as a result of the new
inserted space, and the current line_box left offset in a RTL text. We
are applying some adjustments in the ComputeLocalCaretRectAtTextOffset
function, to ensure that the caret_location offset was between the
line_box.X() and the right_limit. Since the line_box.X() didn't include
the hang_width, the effect was that the caret never advanced to the new
position after the inserted space.

Bug: 1278559
Change-Id: I2873a80ea74174caf47c3af33c031c4da617cd55
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3387789
Reviewed-by: Koji Ishii <kojii@chromium.org>
Commit-Queue: Javier Fernandez <jfernandez@igalia.com>
Cr-Commit-Position: refs/heads/main@{#960270}
2 files changed
tree: 279a6b06134c3d53a6168375c134c4477d031bf0
  1. .github/
  2. .well-known/
  3. accelerometer/
  4. accessibility/
  5. accname/
  6. acid/
  7. ambient-light/
  8. animation-worklet/
  9. annotation-model/
  10. annotation-protocol/
  11. annotation-vocab/
  12. apng/
  13. app-history/
  14. appmanifest/
  15. audio-output/
  16. background-fetch/
  17. BackgroundSync/
  18. badging/
  19. battery-status/
  20. beacon/
  21. bluetooth/
  22. clear-site-data/
  23. client-hints/
  24. clipboard-apis/
  25. common/
  26. compat/
  27. compression/
  28. compute-pressure/
  29. conformance-checkers/
  30. console/
  31. contacts/
  32. content-dpr/
  33. content-index/
  34. content-security-policy/
  35. contenteditable/
  36. cookie-store/
  37. cookies/
  38. core-aam/
  39. cors/
  40. credential-management/
  41. css/
  42. custom-elements/
  43. custom-state-pseudo-class/
  44. delegated-ink/
  45. density-size-correction/
  46. deprecation-reporting/
  47. device-memory/
  48. direct-sockets/
  49. docs/
  50. document-policy/
  51. dom/
  52. domparsing/
  53. domxpath/
  54. dpub-aam/
  55. dpub-aria/
  56. editing/
  57. element-timing/
  58. encoding/
  59. encoding-detection/
  60. encrypted-media/
  61. entries-api/
  62. event-timing/
  63. eventsource/
  64. eyedropper/
  65. feature-policy/
  66. fetch/
  67. file-system-access/
  68. FileAPI/
  69. focus/
  70. font-access/
  71. fonts/
  72. forced-colors-mode/
  73. fullscreen/
  74. gamepad/
  75. generic-sensor/
  76. geolocation-API/
  77. geolocation-sensor/
  78. graphics-aam/
  79. gyroscope/
  80. hr-time/
  81. html/
  82. html-longdesc/
  83. html-media-capture/
  84. idle-detection/
  85. imagebitmap-renderingcontext/
  86. images/
  87. import-maps/
  88. IndexedDB/
  89. inert/
  90. infrastructure/
  91. input-device-capabilities/
  92. input-events/
  93. installedapp/
  94. interfaces/
  95. intersection-observer/
  96. intervention-reporting/
  97. is-input-pending/
  98. js/
  99. js-self-profiling/
  100. keyboard-lock/
  101. keyboard-map/
  102. largest-contentful-paint/
  103. layout-instability/
  104. lifecycle/
  105. loading/
  106. longtask-timing/
  107. magnetometer/
  108. managed/
  109. mathml/
  110. measure-memory/
  111. media/
  112. media-capabilities/
  113. media-playback-quality/
  114. media-source/
  115. mediacapture-depth/
  116. mediacapture-fromelement/
  117. mediacapture-image/
  118. mediacapture-insertable-streams/
  119. mediacapture-record/
  120. mediacapture-streams/
  121. mediasession/
  122. merchant-validation/
  123. mimesniff/
  124. mixed-content/
  125. mst-content-hint/
  126. native-io/
  127. navigation-timing/
  128. netinfo/
  129. network-error-logging/
  130. notifications/
  131. old-tests/
  132. orientation-event/
  133. orientation-sensor/
  134. origin-policy/
  135. page-lifecycle/
  136. page-visibility/
  137. paint-timing/
  138. parakeet/
  139. payment-handler/
  140. payment-method-basic-card/
  141. payment-method-id/
  142. payment-request/
  143. performance-timeline/
  144. periodic-background-sync/
  145. permissions/
  146. permissions-policy/
  147. permissions-request/
  148. permissions-revoke/
  149. picture-in-picture/
  150. pointerevents/
  151. pointerlock/
  152. portals/
  153. preload/
  154. presentation-api/
  155. priority-hints/
  156. private-click-measurement/
  157. proximity/
  158. push-api/
  159. quirks/
  160. referrer-policy/
  161. remote-playback/
  162. reporting/
  163. requestidlecallback/
  164. resize-observer/
  165. resource-timing/
  166. resources/
  167. sanitizer-api/
  168. savedata/
  169. scheduler/
  170. screen-capture/
  171. screen-orientation/
  172. screen-wake-lock/
  173. screen_enumeration/
  174. scroll-animations/
  175. scroll-to-text-fragment/
  176. secure-contexts/
  177. secure-payment-confirmation/
  178. selection/
  179. serial/
  180. server-timing/
  181. service-workers/
  182. shadow-dom/
  183. shape-detection/
  184. signed-exchange/
  185. speculation-rules/
  186. speech-api/
  187. storage/
  188. storage-access-api/
  189. streams/
  190. subresource-integrity/
  191. svg/
  192. svg-aam/
  193. timing-entrytypes-registry/
  194. tools/
  195. touch-events/
  196. trust-tokens/
  197. trusted-types/
  198. ua-client-hints/
  199. uievents/
  200. upgrade-insecure-requests/
  201. url/
  202. urlpattern/
  203. user-timing/
  204. vibration/
  205. video-rvfc/
  206. virtual-keyboard/
  207. visual-viewport/
  208. wai-aria/
  209. wasm/
  210. web-animations/
  211. web-bundle/
  212. web-locks/
  213. web-nfc/
  214. web-otp/
  215. web-share/
  216. webaudio/
  217. webauthn/
  218. webcodecs/
  219. WebCryptoAPI/
  220. webdriver/
  221. webgl/
  222. webgpu/
  223. webhid/
  224. webidl/
  225. webmessaging/
  226. webmidi/
  227. webnn/
  228. webrtc/
  229. webrtc-encoded-transform/
  230. webrtc-extensions/
  231. webrtc-ice/
  232. webrtc-identity/
  233. webrtc-priority/
  234. webrtc-stats/
  235. webrtc-svc/
  236. websockets/
  237. webstorage/
  238. webtransport/
  239. webusb/
  240. webvr/
  241. webvtt/
  242. webxr/
  243. workers/
  244. worklets/
  245. x-frame-options/
  246. xhr/
  247. xslt/
  248. .azure-pipelines.yml
  249. .gitattributes
  250. .gitignore
  251. .mailmap
  252. .taskcluster.yml
  253. CODE_OF_CONDUCT.md
  254. CODEOWNERS
  255. CONTRIBUTING.md
  256. LICENSE.md
  257. lint.ignore
  258. README.md
  259. testharness_runner.html
  260. wpt
  261. wpt.py
README.md

The web-platform-tests Project

Taskcluster CI Status documentation manifest Python 3

The web-platform-tests Project is a cross-browser test suite for the Web-platform stack. Writing tests in a way that allows them to be run in all browsers gives browser projects confidence that they are shipping software that is compatible with other implementations, and that later implementations will be compatible with their implementations. This in turn gives Web authors/developers confidence that they can actually rely on the Web platform to deliver on the promise of working across browsers and devices without needing extra layers of abstraction to paper over the gaps left by specification editors and implementors.

The most important sources of information and activity are:

  • github.com/web-platform-tests/wpt: the canonical location of the project's source code revision history and the discussion forum for changes to the code
  • web-platform-tests.org: the documentation website; details how to set up the project, how to write tests, how to give and receive peer review, how to serve as an administrator, and more
  • wpt.live: a public deployment of the test suite, allowing anyone to run the tests by visiting from an Internet-enabled browser of their choice
  • wpt.fyi: an archive of test results collected from an array of web browsers on a regular basis
  • Real-time chat room: the wpt:matrix.org matrix channel; includes participants located around the world, but busiest during the European working day.
  • Mailing list: a public and low-traffic discussion list
  • RFCs: a repo for requesting comments on substantial changes that would impact other stakeholders or users; people who work on WPT infra are encouraged to watch the repo.

If you'd like clarification about anything, don't hesitate to ask in the chat room or on the mailing list.

Setting Up the Repo

Clone or otherwise get https://github.com/web-platform-tests/wpt.

Note: because of the frequent creation and deletion of branches in this repo, it is recommended to “prune” stale branches when fetching updates, i.e. use git pull --prune (or git fetch -p && git merge).

Running the Tests

See the documentation website and in particular the system setup for running tests locally.

Command Line Tools

The wpt command provides a frontend to a variety of tools for working with and running web-platform-tests. Some of the most useful commands are:

  • wpt serve - For starting the wpt http server
  • wpt run - For running tests in a browser
  • wpt lint - For running the lint against all tests
  • wpt manifest - For updating or generating a MANIFEST.json test manifest
  • wpt install - For installing the latest release of a browser or webdriver server on the local machine.
  • wpt serve-wave - For starting the wpt http server and the WAVE test runner. For more details on how to use the WAVE test runner see the documentation.

Windows Notes

On Windows wpt commands must be prefixed with python or the path to the python binary (if python is not in your %PATH%).

python wpt [command]

Alternatively, you may also use Bash on Ubuntu on Windows in the Windows 10 Anniversary Update build, then access your windows partition from there to launch wpt commands.

Please make sure git and your text editor do not automatically convert line endings, as it will cause lint errors. For git, please set git config core.autocrlf false in your working tree.

Publication

The master branch is automatically synced to wpt.live and w3c-test.org.

Contributing

Save the Web, Write Some Tests!

Absolutely everyone is welcome to contribute to test development. No test is too small or too simple, especially if it corresponds to something for which you've noted an interoperability bug in a browser.

The way to contribute is just as usual:

  • Fork this repository (and make sure you're still relatively in sync with it if you forked a while ago).
  • Create a branch for your changes: git checkout -b topic.
  • Make your changes.
  • Run ./wpt lint as described above.
  • Commit locally and push that to your repo.
  • Create a pull request based on the above.

Issues with web-platform-tests

If you spot an issue with a test and are not comfortable providing a pull request per above to fix it, please file a new issue. Thank you!