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fix_font_face_resolution_when_renderer_is_blocked.patch

fix_font_face_resolution_when_renderer_is_blocked.patch 2.4 KB
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  1. From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
    2. 

  2. From: Shelley Vohr <[email protected]>
    3. 

  3. Date: Tue, 4 Jun 2024 15:29:10 +0200
    4. 

  4. Subject: Fix font face resolution when renderer is blocked
    5. 

  5. 

  6. Backports https://chromium-review.googlesource.com/c/chromium/src/+/5584820
    7. 

  7. 

  8. As a result of https://chromium-review.googlesource.com/c/chromium/src/+/5290838,
    9. 

  9. the FontFaceSet promise in e.g. contentWindow.document.fonts.ready will never resolve
    10. 

  10. while the renderer is blocked. This Cl takes an approach similar to that taken in
    11. 

  11. MediaQueryList in order to enable the promise to be resolved.
    12. 

  12. 

  13. diff --git a/third_party/blink/renderer/core/css/font_face_set_document.cc b/third_party/blink/renderer/core/css/font_face_set_document.cc
    14. 

  14. index 79d15ae4d9de6350429b9b907d5136266d02c579..7e26808b3ef4437940ee6745d2651037c1bba9a2 100644
    15. 

  15. --- a/third_party/blink/renderer/core/css/font_face_set_document.cc
    16. 

  16. +++ b/third_party/blink/renderer/core/css/font_face_set_document.cc
    17. 

  17. @@ -27,6 +27,7 @@
    18. 

  18.  
    19. 

  19.  #include "base/metrics/histogram_functions.h"
    20. 

  20.  #include "third_party/blink/public/common/features.h"
    21. 

  21. +#include "third_party/blink/public/common/metrics/document_update_reason.h"
    22. 

  22.  #include "third_party/blink/renderer/bindings/core/v8/dictionary.h"
    23. 

  23.  #include "third_party/blink/renderer/core/css/css_font_face.h"
    24. 

  24.  #include "third_party/blink/renderer/core/css/css_font_selector.h"
    25. 

  25. @@ -141,21 +142,27 @@ FontFaceSetDocument::CSSConnectedFontFaceList() const {
    26. 

  26.  }
    27. 

  27.  
    28. 

  28.  void FontFaceSetDocument::FireDoneEventIfPossible() {
    29. 

  29. -  if (should_fire_loading_event_) {
    30. 

  30. +  Document* d = GetDocument();
    31. 

  31. +  if (!d || !d->View()) {
    32. 

  32.      return;
    33. 

  33.    }
    34. 

  34. +
    35. 

  35.    if (!ShouldSignalReady()) {
    36. 

  36.      return;
    37. 

  37.    }
    38. 

  38. -  Document* d = GetDocument();
    39. 

  39. -  if (!d) {
    40. 

  40. +
    41. 

  41. +  // FireDoneEventIfPossible gets scheduled via PostTask at the end of a
    42. 

  42. +  // successful style+layout update. An invalidation may have occurred in
    43. 

  43. +  // the interim, so update style and layout synchronously here.
    44. 

  44. +  d->UpdateStyleAndLayout(DocumentUpdateReason::kUnknown);
    45. 

  45. +
    46. 

  46. +  // These values can change during style+layout update, so check them
    47. 

  47. +  // *after* the call to UpdateStyleAndLayout.
    48. 

  48. +  if (should_fire_loading_event_) {
    49. 

  49.      return;
    50. 

  50.    }
    51. 

  51.  
    52. 

  52. -  // If the layout was invalidated in between when we thought layout
    53. 

  53. -  // was updated and when we're ready to fire the event, just wait
    54. 

  54. -  // until after the next layout before firing events.
    55. 

  55. -  if (!d->View() || d->View()->NeedsLayout()) {
    56. 

  56. +  if (!ShouldSignalReady()) {
    57. 

  57.      return;
    58. 

  58.    }
    59. 

  59.  
    60.