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[css-inline] should define how the initial-letter relates to line boxes #887

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dbaron opened this issue Jan 11, 2017 · 1 comment
Open

[css-inline] should define how the initial-letter relates to line boxes #887

dbaron opened this issue Jan 11, 2017 · 1 comment
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css-inline-3 Current Work Needs Design / Proposal
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Initial Letters

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@dbaron
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dbaron commented Jan 11, 2017

Per today's face-to-face discussion, we should define how initial-letter relates to line boxes.

I think we tended to think that it isn't part of the block's first line box. The question is whether it has its own special line box. And whether this has implications for interactions with text-decoration.
@dbaron dbaron added the css-inline-3 Current Work label Jan 11, 2017
@upsuper
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upsuper commented Jan 15, 2017

Per the current spec, initial-letter can wrap... which probably indicates it can sometimes has even more than one line box...

@fantasai fantasai added this to F2F Discussion in Initial Letters Oct 16, 2018
Merged
chromium-wpt-export-bot pushed a commit to web-platform-tests/wpt that referenced this issue Dec 1, 2022
@yosinch @chromium-wpt-export-bot
[initial-letter] Use baseline alignment for drop, raise, sunken initail
d84accf 
This patch changes `ComputeInitialLetterBoxBlockOffset()` to use
baseline alignment instead of line-under alignment when initial-letter
size >= sink, e.g. `initial-letter: 3 drop`, `initial-letter: 3 raise`,
`initial-letter: 3 2` to match the spec[1][2].

This patch also introduces new test:
 `initial-letter-text-decoration-underline.html`
for verifying baseline alignment and underline for the open issue
887[5].

# Detals

The spec says[2]:

If its size is greater than or equal to its sink, the initial letter is
positioned to satisfy its under alignment, and then shifted by
--------------------------^^^^^^^^^^^^^^^
(sink - 1) × line-height of containing block towards the containing block’s
block end.

The spec says[3]:

This property specifies the alignment points used to size and position an
initial letter. Two sets of alignment points are necessary:
the over and under alignment points of the initial letter are matched to
-------------^^^^^^^^^^^^^^^
corresponding over and under points of the root inline box.

Before this patch, Blink uses "line-under"[4], the link is pointed to.
After this patch, Blink uses "baseline" as
`initial-letter-align: alphabetic`[1].

[1] https://drafts.csswg.org/css-inline-3/#valdef-initial-letter-align-alphabetic
[2] https://drafts.csswg.org/css-inline-3/#initial-letter-block-position
[3] https://drafts.csswg.org/css-inline-3/#aligning-initial-letter
[4] https://drafts.csswg.org/css-writing-modes-4/#under
[5] w3c/csswg-drafts#887

Bug: 1276900
Change-Id: I99e0b535f13350856187a5d2af8136c7eef78f80
chromium-wpt-export-bot pushed a commit to web-platform-tests/wpt that referenced this issue Dec 1, 2022
@yosinch @chromium-wpt-export-bot
[initial-letter] Use baseline alignment for drop, raise, sunken initail
85e52e4 
This patch changes `ComputeInitialLetterBoxBlockOffset()` to use
baseline alignment instead of line-under alignment when initial-letter
size >= sink, e.g. `initial-letter: 3 drop`, `initial-letter: 3 raise`,
`initial-letter: 3 2` to match the spec[1][2].

This patch also introduces new test:
 `initial-letter-text-decoration-underline.html`
for verifying baseline alignment and underline for the open issue
887[5].

# Detals

The spec says[2]:

If its size is greater than or equal to its sink, the initial letter is
positioned to satisfy its under alignment, and then shifted by
--------------------------^^^^^^^^^^^^^^^
(sink - 1) × line-height of containing block towards the containing
block’s block end.

The spec says[3]:

This property specifies the alignment points used to size and position
an initial letter. Two sets of alignment points are necessary:
the over and under alignment points of the initial letter are matched to
-------------^^^^^^^^^^^^^^^
corresponding over and under points of the root inline box.

Before this patch, Blink uses "line-under"[4], the link is pointed to.
After this patch, Blink uses "baseline" as
`initial-letter-align: alphabetic`[1].

[1] https://drafts.csswg.org/css-inline-3/#valdef-initial-letter-align-alphabetic
[2] https://drafts.csswg.org/css-inline-3/#initial-letter-block-position
[3] https://drafts.csswg.org/css-inline-3/#aligning-initial-letter
[4] https://drafts.csswg.org/css-writing-modes-4/#under
[5] w3c/csswg-drafts#887

Bug: 1276900
Change-Id: I99e0b535f13350856187a5d2af8136c7eef78f80
chromium-wpt-export-bot pushed a commit to web-platform-tests/wpt that referenced this issue Dec 1, 2022
@yosinch @chromium-wpt-export-bot
[initial-letter] Use baseline alignment for drop, raise, sunken initail
1c88102 
This patch changes `ComputeInitialLetterBoxBlockOffset()` to use
baseline alignment instead of line-under alignment when initial-letter
size >= sink, e.g. `initial-letter: 3 drop`, `initial-letter: 3 raise`,
`initial-letter: 3 2` to match the spec[1][2].

This patch also introduces new test:
 `initial-letter-text-decoration-underline.html`
for verifying baseline alignment and underline for the open issue
887[5].

# Detals

The spec says[2]:

If its size is greater than or equal to its sink, the initial letter is
positioned to satisfy its under alignment, and then shifted by
--------------------------^^^^^^^^^^^^^^^
(sink - 1) × line-height of containing block towards the containing
block’s block end.

The spec says[3]:

This property specifies the alignment points used to size and position
an initial letter. Two sets of alignment points are necessary:
the over and under alignment points of the initial letter are matched to
-------------^^^^^^^^^^^^^^^
corresponding over and under points of the root inline box.

Before this patch, Blink uses "line-under"[4], the link is pointed to.
After this patch, Blink uses "baseline" as
`initial-letter-align: alphabetic`[1].

[1] https://drafts.csswg.org/css-inline-3/#valdef-initial-letter-align-alphabetic
[2] https://drafts.csswg.org/css-inline-3/#initial-letter-block-position
[3] https://drafts.csswg.org/css-inline-3/#aligning-initial-letter
[4] https://drafts.csswg.org/css-writing-modes-4/#under
[5] w3c/csswg-drafts#887

Bug: 1276900
Change-Id: I99e0b535f13350856187a5d2af8136c7eef78f80
chromium-wpt-export-bot pushed a commit to web-platform-tests/wpt that referenced this issue Dec 2, 2022
@yosinch @chromium-wpt-export-bot
[initial-letter] Use baseline alignment for drop, raise, sunken initial
41dbd74 
This patch changes `ComputeInitialLetterBoxBlockOffset()` to use
baseline alignment instead of line-under alignment when initial-letter
size >= sink, e.g. `initial-letter: 3 drop`, `initial-letter: 3 raise`,
`initial-letter: 3 2` to match the spec[1][2].

This patch also introduces new test:
 `initial-letter-text-decoration-underline.html`
for verifying baseline alignment and underline for the open issue
887[5].

# Details

The spec says[2]:

If its size is greater than or equal to its sink, the initial letter is
positioned to satisfy its under alignment, and then shifted by
--------------------------^^^^^^^^^^^^^^^
(sink - 1) × line-height of containing block towards the containing
block’s block end.

The spec says[3]:

This property specifies the alignment points used to size and position
an initial letter. Two sets of alignment points are necessary:
the over and under alignment points of the initial letter are matched to
-------------^^^^^^^^^^^^^^^
corresponding over and under points of the root inline box.

Before this patch, Blink uses "line-under"[4], the link is pointed to.
After this patch, Blink uses "baseline" as
`initial-letter-align: alphabetic`[1].

[1] https://drafts.csswg.org/css-inline-3/#valdef-initial-letter-align-alphabetic
[2] https://drafts.csswg.org/css-inline-3/#initial-letter-block-position
[3] https://drafts.csswg.org/css-inline-3/#aligning-initial-letter
[4] https://drafts.csswg.org/css-writing-modes-4/#under
[5] w3c/csswg-drafts#887

Bug: 1276900
Change-Id: I99e0b535f13350856187a5d2af8136c7eef78f80
chromium-wpt-export-bot pushed a commit to web-platform-tests/wpt that referenced this issue Dec 2, 2022
@yosinch @chromium-wpt-export-bot
[initial-letter] Use baseline alignment for drop, raise, sunken initial
1fe03ee 
This patch changes `ComputeInitialLetterBoxBlockOffset()` to use
baseline alignment instead of line-under alignment when initial-letter
size >= sink, e.g. `initial-letter: 3 drop`, `initial-letter: 3 raise`,
`initial-letter: 3 2` to match the spec[1][2].

This patch also introduces new test:
 `initial-letter-text-decoration-underline.html`
for verifying baseline alignment and underline for the open issue
887[5].

# Details

The spec says[2]:

If its size is greater than or equal to its sink, the initial letter is
positioned to satisfy its under alignment, and then shifted by
--------------------------^^^^^^^^^^^^^^^
(sink - 1) × line-height of containing block towards the containing
block’s block end.

The spec says[3]:

This property specifies the alignment points used to size and position
an initial letter. Two sets of alignment points are necessary:
the over and under alignment points of the initial letter are matched to
-------------^^^^^^^^^^^^^^^
corresponding over and under points of the root inline box.

Before this patch, Blink uses "line-under"[4], the link is pointed to.
After this patch, Blink uses "baseline" as
`initial-letter-align: alphabetic`[1].

[1] https://drafts.csswg.org/css-inline-3/#valdef-initial-letter-align-alphabetic
[2] https://drafts.csswg.org/css-inline-3/#initial-letter-block-position
[3] https://drafts.csswg.org/css-inline-3/#aligning-initial-letter
[4] https://drafts.csswg.org/css-writing-modes-4/#under
[5] w3c/csswg-drafts#887

Bug: 1276900
Change-Id: I99e0b535f13350856187a5d2af8136c7eef78f80
chromium-wpt-export-bot pushed a commit to web-platform-tests/wpt that referenced this issue Dec 2, 2022
@yosinch @chromium-wpt-export-bot
[initial-letter] Use baseline alignment for drop, raise, sunken initial
bca4150 
This patch changes `ComputeInitialLetterBoxBlockOffset()` to use
baseline alignment instead of line-under alignment when initial-letter
size >= sink, e.g. `initial-letter: 3 drop`, `initial-letter: 3 raise`,
`initial-letter: 3 2` to match the spec[1][2].

This patch also introduces new test:
 `initial-letter-text-decoration-underline.html`
for verifying baseline alignment and underline for the open issue
887[5].

# Details

The spec says[2]:

If its size is greater than or equal to its sink, the initial letter is
positioned to satisfy its under alignment, and then shifted by
--------------------------^^^^^^^^^^^^^^^
(sink - 1) × line-height of containing block towards the containing
block’s block end.

The spec says[3]:

This property specifies the alignment points used to size and position
an initial letter. Two sets of alignment points are necessary:
the over and under alignment points of the initial letter are matched to
-------------^^^^^^^^^^^^^^^
corresponding over and under points of the root inline box.

Before this patch, Blink uses "line-under"[4], the link is pointed to.
After this patch, Blink uses "baseline" as
`initial-letter-align: alphabetic`[1].

[1] https://drafts.csswg.org/css-inline-3/#valdef-initial-letter-align-alphabetic
[2] https://drafts.csswg.org/css-inline-3/#initial-letter-block-position
[3] https://drafts.csswg.org/css-inline-3/#aligning-initial-letter
[4] https://drafts.csswg.org/css-writing-modes-4/#under
[5] w3c/csswg-drafts#887

Bug: 1276900
Change-Id: I99e0b535f13350856187a5d2af8136c7eef78f80
chromium-wpt-export-bot pushed a commit to web-platform-tests/wpt that referenced this issue Dec 2, 2022
@yosinch @chromium-wpt-export-bot
[initial-letter] Use baseline alignment for drop, raise, sunken initial
208773e 
This patch changes `ComputeInitialLetterBoxBlockOffset()` to use
baseline alignment instead of line-under alignment when initial-letter
size >= sink, e.g. `initial-letter: 3 drop`, `initial-letter: 3 raise`,
`initial-letter: 3 2` to match the spec[1][2].

This patch also introduces new test:
 `initial-letter-text-decoration-underline.html`
for verifying baseline alignment and underline for the open issue
887[5].

# Details

The spec says[2]:

If its size is greater than or equal to its sink, the initial letter is
positioned to satisfy its under alignment, and then shifted by
--------------------------^^^^^^^^^^^^^^^
(sink - 1) × line-height of containing block towards the containing
block’s block end.

The spec says[3]:

This property specifies the alignment points used to size and position
an initial letter. Two sets of alignment points are necessary:
the over and under alignment points of the initial letter are matched to
-------------^^^^^^^^^^^^^^^
corresponding over and under points of the root inline box.

Before this patch, Blink uses "line-under"[4], the link is pointed to.
After this patch, Blink uses "baseline" as
`initial-letter-align: alphabetic`[1].

[1] https://drafts.csswg.org/css-inline-3/#valdef-initial-letter-align-alphabetic
[2] https://drafts.csswg.org/css-inline-3/#initial-letter-block-position
[3] https://drafts.csswg.org/css-inline-3/#aligning-initial-letter
[4] https://drafts.csswg.org/css-writing-modes-4/#under
[5] w3c/csswg-drafts#887

Bug: 1276900
Change-Id: I99e0b535f13350856187a5d2af8136c7eef78f80
chromium-wpt-export-bot pushed a commit to web-platform-tests/wpt that referenced this issue Dec 2, 2022
@yosinch @chromium-wpt-export-bot
[initial-letter] Use baseline alignment for drop, raise, sunken initial
52a2017 
This patch changes `ComputeInitialLetterBoxBlockOffset()` to use
baseline alignment instead of line-under alignment when initial-letter
size >= sink, e.g. `initial-letter: 3 drop`, `initial-letter: 3 raise`,
`initial-letter: 3 2` to match the spec[1][2].

This patch also introduces new test:
 `initial-letter-text-decoration-underline.html`
for verifying baseline alignment and underline for the open issue
887[5].

# Details

The spec says[2]:

If its size is greater than or equal to its sink, the initial letter is
positioned to satisfy its under alignment, and then shifted by
--------------------------^^^^^^^^^^^^^^^
(sink - 1) × line-height of containing block towards the containing
block’s block end.

The spec says[3]:

This property specifies the alignment points used to size and position
an initial letter. Two sets of alignment points are necessary:
the over and under alignment points of the initial letter are matched to
-------------^^^^^^^^^^^^^^^
corresponding over and under points of the root inline box.

Before this patch, Blink uses "line-under"[4], the link is pointed to.
After this patch, Blink uses "baseline" as
`initial-letter-align: alphabetic`[1].

[1] https://drafts.csswg.org/css-inline-3/#valdef-initial-letter-align-alphabetic
[2] https://drafts.csswg.org/css-inline-3/#initial-letter-block-position
[3] https://drafts.csswg.org/css-inline-3/#aligning-initial-letter
[4] https://drafts.csswg.org/css-writing-modes-4/#under
[5] w3c/csswg-drafts#887

Bug: 1276900
Change-Id: I99e0b535f13350856187a5d2af8136c7eef78f80
chromium-wpt-export-bot pushed a commit to web-platform-tests/wpt that referenced this issue Dec 2, 2022
@yosinch @chromium-wpt-export-bot
[initial-letter] Use baseline alignment for drop, raise, sunken initial
bfd47f2 
This patch changes `ComputeInitialLetterBoxBlockOffset()` to use
baseline alignment instead of line-under alignment when initial-letter
size >= sink, e.g. `initial-letter: 3 drop`, `initial-letter: 3 raise`,
`initial-letter: 3 2` to match the spec[1][2].

This patch also introduces new test:
 `initial-letter-text-decoration-underline.html`
for verifying baseline alignment and underline for the open issue
887[5].

# Details

The spec says[2]:

If its size is greater than or equal to its sink, the initial letter is
positioned to satisfy its under alignment, and then shifted by
--------------------------^^^^^^^^^^^^^^^
(sink - 1) × line-height of containing block towards the containing
block’s block end.

The spec says[3]:

This property specifies the alignment points used to size and position
an initial letter. Two sets of alignment points are necessary:
the over and under alignment points of the initial letter are matched to
-------------^^^^^^^^^^^^^^^
corresponding over and under points of the root inline box.

Before this patch, Blink uses "line-under"[4], the link is pointed to.
After this patch, Blink uses "baseline" as
`initial-letter-align: alphabetic`[1].

[1] https://drafts.csswg.org/css-inline-3/#valdef-initial-letter-align-alphabetic
[2] https://drafts.csswg.org/css-inline-3/#initial-letter-block-position
[3] https://drafts.csswg.org/css-inline-3/#aligning-initial-letter
[4] https://drafts.csswg.org/css-writing-modes-4/#under
[5] w3c/csswg-drafts#887

Bug: 1276900
Change-Id: I99e0b535f13350856187a5d2af8136c7eef78f80
chromium-wpt-export-bot pushed a commit to web-platform-tests/wpt that referenced this issue Dec 2, 2022
@yosinch @chromium-wpt-export-bot
[initial-letter] Use baseline alignment for drop, raise, sunken initial
8440337 
This patch changes `ComputeInitialLetterBoxBlockOffset()` to use
baseline alignment instead of line-under alignment when initial-letter
size >= sink, e.g. `initial-letter: 3 drop`, `initial-letter: 3 raise`,
`initial-letter: 3 2` to match the spec[1][2].

This patch also introduces new test:
 `initial-letter-text-decoration-underline.html`
for verifying baseline alignment and underline for the open issue
887[5].

# Details

The spec says[2]:

If its size is greater than or equal to its sink, the initial letter is
positioned to satisfy its under alignment, and then shifted by
--------------------------^^^^^^^^^^^^^^^
(sink - 1) × line-height of containing block towards the containing
block’s block end.

The spec says[3]:

This property specifies the alignment points used to size and position
an initial letter. Two sets of alignment points are necessary:
the over and under alignment points of the initial letter are matched to
-------------^^^^^^^^^^^^^^^
corresponding over and under points of the root inline box.

Before this patch, Blink uses "line-under"[4], the link is pointed to.
After this patch, Blink uses "baseline" as
`initial-letter-align: alphabetic`[1].

[1] https://drafts.csswg.org/css-inline-3/#valdef-initial-letter-align-alphabetic
[2] https://drafts.csswg.org/css-inline-3/#initial-letter-block-position
[3] https://drafts.csswg.org/css-inline-3/#aligning-initial-letter
[4] https://drafts.csswg.org/css-writing-modes-4/#under
[5] w3c/csswg-drafts#887

Bug: 1276900
Change-Id: I99e0b535f13350856187a5d2af8136c7eef78f80
aarongable pushed a commit to chromium/chromium that referenced this issue Dec 2, 2022
@yosinch
[initial-letter] Use baseline alignment for drop, raise, sunken initial
5beb0b8 
This patch changes `ComputeInitialLetterBoxBlockOffset()` to use
baseline alignment instead of line-under alignment when initial-letter
size >= sink, e.g. `initial-letter: 3 drop`, `initial-letter: 3 raise`,
`initial-letter: 3 2` to match the spec[1][2].

This patch also introduces new test:
 `initial-letter-text-decoration-underline.html`
for verifying baseline alignment and underline for the open issue
887[5].


# Details

The spec says[2]:

If its size is greater than or equal to its sink, the initial letter is
positioned to satisfy its under alignment, and then shifted by
--------------------------^^^^^^^^^^^^^^^
(sink - 1) × line-height of containing block towards the containing
block’s block end.

The spec says[3]:

This property specifies the alignment points used to size and position
an initial letter. Two sets of alignment points are necessary:
the over and under alignment points of the initial letter are matched to
-------------^^^^^^^^^^^^^^^
corresponding over and under points of the root inline box.

Before this patch, Blink uses "line-under"[4], the link is pointed to.
After this patch, Blink uses "baseline" as
`initial-letter-align: alphabetic`[1].

[1] https://drafts.csswg.org/css-inline-3/#valdef-initial-letter-align-alphabetic
[2] https://drafts.csswg.org/css-inline-3/#initial-letter-block-position
[3] https://drafts.csswg.org/css-inline-3/#aligning-initial-letter
[4] https://drafts.csswg.org/css-writing-modes-4/#under
[5] w3c/csswg-drafts#887

Bug: 1276900
Change-Id: I99e0b535f13350856187a5d2af8136c7eef78f80
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4067085
Reviewed-by: Ian Kilpatrick <ikilpatrick@chromium.org>
Reviewed-by: Koji Ishii <kojii@chromium.org>
Commit-Queue: Koji Ishii <kojii@chromium.org>
Auto-Submit: Yoshifumi Inoue <yosin@chromium.org>
Commit-Queue: Yoshifumi Inoue <yosin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1078467}
chromium-wpt-export-bot pushed a commit to web-platform-tests/wpt that referenced this issue Dec 2, 2022
@yosinch @chromium-wpt-export-bot
[initial-letter] Use baseline alignment for drop, raise, sunken initial
116f994 
This patch changes `ComputeInitialLetterBoxBlockOffset()` to use
baseline alignment instead of line-under alignment when initial-letter
size >= sink, e.g. `initial-letter: 3 drop`, `initial-letter: 3 raise`,
`initial-letter: 3 2` to match the spec[1][2].

This patch also introduces new test:
 `initial-letter-text-decoration-underline.html`
for verifying baseline alignment and underline for the open issue
887[5].

# Details

The spec says[2]:

If its size is greater than or equal to its sink, the initial letter is
positioned to satisfy its under alignment, and then shifted by
--------------------------^^^^^^^^^^^^^^^
(sink - 1) × line-height of containing block towards the containing
block’s block end.

The spec says[3]:

This property specifies the alignment points used to size and position
an initial letter. Two sets of alignment points are necessary:
the over and under alignment points of the initial letter are matched to
-------------^^^^^^^^^^^^^^^
corresponding over and under points of the root inline box.

Before this patch, Blink uses "line-under"[4], the link is pointed to.
After this patch, Blink uses "baseline" as
`initial-letter-align: alphabetic`[1].

[1] https://drafts.csswg.org/css-inline-3/#valdef-initial-letter-align-alphabetic
[2] https://drafts.csswg.org/css-inline-3/#initial-letter-block-position
[3] https://drafts.csswg.org/css-inline-3/#aligning-initial-letter
[4] https://drafts.csswg.org/css-writing-modes-4/#under
[5] w3c/csswg-drafts#887

Bug: 1276900
Change-Id: I99e0b535f13350856187a5d2af8136c7eef78f80
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4067085
Reviewed-by: Ian Kilpatrick <ikilpatrick@chromium.org>
Reviewed-by: Koji Ishii <kojii@chromium.org>
Commit-Queue: Koji Ishii <kojii@chromium.org>
Auto-Submit: Yoshifumi Inoue <yosin@chromium.org>
Commit-Queue: Yoshifumi Inoue <yosin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1078467}
chromium-wpt-export-bot pushed a commit to web-platform-tests/wpt that referenced this issue Dec 2, 2022
@yosinch @chromium-wpt-export-bot
[initial-letter] Use baseline alignment for drop, raise, sunken initial
e1400ef 
This patch changes `ComputeInitialLetterBoxBlockOffset()` to use
baseline alignment instead of line-under alignment when initial-letter
size >= sink, e.g. `initial-letter: 3 drop`, `initial-letter: 3 raise`,
`initial-letter: 3 2` to match the spec[1][2].

This patch also introduces new test:
 `initial-letter-text-decoration-underline.html`
for verifying baseline alignment and underline for the open issue
887[5].

# Details

The spec says[2]:

If its size is greater than or equal to its sink, the initial letter is
positioned to satisfy its under alignment, and then shifted by
--------------------------^^^^^^^^^^^^^^^
(sink - 1) × line-height of containing block towards the containing
block’s block end.

The spec says[3]:

This property specifies the alignment points used to size and position
an initial letter. Two sets of alignment points are necessary:
the over and under alignment points of the initial letter are matched to
-------------^^^^^^^^^^^^^^^
corresponding over and under points of the root inline box.

Before this patch, Blink uses "line-under"[4], the link is pointed to.
After this patch, Blink uses "baseline" as
`initial-letter-align: alphabetic`[1].

[1] https://drafts.csswg.org/css-inline-3/#valdef-initial-letter-align-alphabetic
[2] https://drafts.csswg.org/css-inline-3/#initial-letter-block-position
[3] https://drafts.csswg.org/css-inline-3/#aligning-initial-letter
[4] https://drafts.csswg.org/css-writing-modes-4/#under
[5] w3c/csswg-drafts#887

Bug: 1276900
Change-Id: I99e0b535f13350856187a5d2af8136c7eef78f80
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4067085
Reviewed-by: Ian Kilpatrick <ikilpatrick@chromium.org>
Reviewed-by: Koji Ishii <kojii@chromium.org>
Commit-Queue: Koji Ishii <kojii@chromium.org>
Auto-Submit: Yoshifumi Inoue <yosin@chromium.org>
Commit-Queue: Yoshifumi Inoue <yosin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1078467}
moz-v2v-gh pushed a commit to mozilla/gecko-dev that referenced this issue Dec 11, 2022
@yosinch @moz-wptsync-bot
Bug 1803554 [wpt PR 37277] - [initial-letter] Use baseline alignment …
0cfafcb 
…for drop, raise, sunken initial, a=testonly

Automatic update from web-platform-tests
[initial-letter] Use baseline alignment for drop, raise, sunken initial

This patch changes `ComputeInitialLetterBoxBlockOffset()` to use
baseline alignment instead of line-under alignment when initial-letter
size >= sink, e.g. `initial-letter: 3 drop`, `initial-letter: 3 raise`,
`initial-letter: 3 2` to match the spec[1][2].

This patch also introduces new test:
 `initial-letter-text-decoration-underline.html`
for verifying baseline alignment and underline for the open issue
887[5].

# Details

The spec says[2]:

If its size is greater than or equal to its sink, the initial letter is
positioned to satisfy its under alignment, and then shifted by
--------------------------^^^^^^^^^^^^^^^
(sink - 1) × line-height of containing block towards the containing
block’s block end.

The spec says[3]:

This property specifies the alignment points used to size and position
an initial letter. Two sets of alignment points are necessary:
the over and under alignment points of the initial letter are matched to
-------------^^^^^^^^^^^^^^^
corresponding over and under points of the root inline box.

Before this patch, Blink uses "line-under"[4], the link is pointed to.
After this patch, Blink uses "baseline" as
`initial-letter-align: alphabetic`[1].

[1] https://drafts.csswg.org/css-inline-3/#valdef-initial-letter-align-alphabetic
[2] https://drafts.csswg.org/css-inline-3/#initial-letter-block-position
[3] https://drafts.csswg.org/css-inline-3/#aligning-initial-letter
[4] https://drafts.csswg.org/css-writing-modes-4/#under
[5] w3c/csswg-drafts#887

Bug: 1276900
Change-Id: I99e0b535f13350856187a5d2af8136c7eef78f80
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4067085
Reviewed-by: Ian Kilpatrick <ikilpatrick@chromium.org>
Reviewed-by: Koji Ishii <kojii@chromium.org>
Commit-Queue: Koji Ishii <kojii@chromium.org>
Auto-Submit: Yoshifumi Inoue <yosin@chromium.org>
Commit-Queue: Yoshifumi Inoue <yosin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1078467}

--

wpt-commits: e1400ef4581676b52364c3c7b9587c705c564ab9
wpt-pr: 37277
BruceDai pushed a commit to BruceDai/wpt that referenced this issue Dec 13, 2022
@yosinch @BruceDai
[initial-letter] Use baseline alignment for drop, raise, sunken initial
6dbe4fd 
This patch changes `ComputeInitialLetterBoxBlockOffset()` to use
baseline alignment instead of line-under alignment when initial-letter
size >= sink, e.g. `initial-letter: 3 drop`, `initial-letter: 3 raise`,
`initial-letter: 3 2` to match the spec[1][2].

This patch also introduces new test:
 `initial-letter-text-decoration-underline.html`
for verifying baseline alignment and underline for the open issue
887[5].

# Details

The spec says[2]:

If its size is greater than or equal to its sink, the initial letter is
positioned to satisfy its under alignment, and then shifted by
--------------------------^^^^^^^^^^^^^^^
(sink - 1) × line-height of containing block towards the containing
block’s block end.

The spec says[3]:

This property specifies the alignment points used to size and position
an initial letter. Two sets of alignment points are necessary:
the over and under alignment points of the initial letter are matched to
-------------^^^^^^^^^^^^^^^
corresponding over and under points of the root inline box.

Before this patch, Blink uses "line-under"[4], the link is pointed to.
After this patch, Blink uses "baseline" as
`initial-letter-align: alphabetic`[1].

[1] https://drafts.csswg.org/css-inline-3/#valdef-initial-letter-align-alphabetic
[2] https://drafts.csswg.org/css-inline-3/#initial-letter-block-position
[3] https://drafts.csswg.org/css-inline-3/#aligning-initial-letter
[4] https://drafts.csswg.org/css-writing-modes-4/#under
[5] w3c/csswg-drafts#887

Bug: 1276900
Change-Id: I99e0b535f13350856187a5d2af8136c7eef78f80
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4067085
Reviewed-by: Ian Kilpatrick <ikilpatrick@chromium.org>
Reviewed-by: Koji Ishii <kojii@chromium.org>
Commit-Queue: Koji Ishii <kojii@chromium.org>
Auto-Submit: Yoshifumi Inoue <yosin@chromium.org>
Commit-Queue: Yoshifumi Inoue <yosin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1078467}
jamienicol pushed a commit to jamienicol/gecko that referenced this issue Dec 14, 2022
@yosinch @moz-wptsync-bot
Bug 1803554 [wpt PR 37277] - [initial-letter] Use baseline alignment …
46096e2 
…for drop, raise, sunken initial, a=testonly

Automatic update from web-platform-tests
[initial-letter] Use baseline alignment for drop, raise, sunken initial

This patch changes `ComputeInitialLetterBoxBlockOffset()` to use
baseline alignment instead of line-under alignment when initial-letter
size >= sink, e.g. `initial-letter: 3 drop`, `initial-letter: 3 raise`,
`initial-letter: 3 2` to match the spec[1][2].

This patch also introduces new test:
 `initial-letter-text-decoration-underline.html`
for verifying baseline alignment and underline for the open issue
887[5].

# Details

The spec says[2]:

If its size is greater than or equal to its sink, the initial letter is
positioned to satisfy its under alignment, and then shifted by
--------------------------^^^^^^^^^^^^^^^
(sink - 1) × line-height of containing block towards the containing
block’s block end.

The spec says[3]:

This property specifies the alignment points used to size and position
an initial letter. Two sets of alignment points are necessary:
the over and under alignment points of the initial letter are matched to
-------------^^^^^^^^^^^^^^^
corresponding over and under points of the root inline box.

Before this patch, Blink uses "line-under"[4], the link is pointed to.
After this patch, Blink uses "baseline" as
`initial-letter-align: alphabetic`[1].

[1] https://drafts.csswg.org/css-inline-3/#valdef-initial-letter-align-alphabetic
[2] https://drafts.csswg.org/css-inline-3/#initial-letter-block-position
[3] https://drafts.csswg.org/css-inline-3/#aligning-initial-letter
[4] https://drafts.csswg.org/css-writing-modes-4/#under
[5] w3c/csswg-drafts#887

Bug: 1276900
Change-Id: I99e0b535f13350856187a5d2af8136c7eef78f80
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4067085
Reviewed-by: Ian Kilpatrick <ikilpatrick@chromium.org>
Reviewed-by: Koji Ishii <kojii@chromium.org>
Commit-Queue: Koji Ishii <kojii@chromium.org>
Auto-Submit: Yoshifumi Inoue <yosin@chromium.org>
Commit-Queue: Yoshifumi Inoue <yosin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1078467}

--

wpt-commits: e1400ef4581676b52364c3c7b9587c705c564ab9
wpt-pr: 37277
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