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URL: https://bugzilla.mozilla.org/show_bug.cgi?id=1785305

⇱ 1785305 - [resize-observer] When first observing an element with ResizeObserver, lastReportedSize should get initialized with a -1 x -1 size

Closed Bug 1785305 Opened 3 years ago Closed 3 years ago

[resize-observer] When first observing an element with ResizeObserver, lastReportedSize should get initialized with a -1 x -1 size

[resize-observer] When first observing an element with ResizeObserver, lastReportedSize should get initialized with a -1 x -1 size
Core
Layout
unspecified
Unspecified
Unspecified
defect
Points:
---
RESOLVED FIXED
RESOLVED
FIXED
106 Branch
Iteration:
---
a11y-review
Accessibility Severity
Performance Impact
Size Estimate
Webcompat Priority
Webcompat Score
Tracking Status
firefox106 --- fixed
Tracking Status
relnote-firefox
thunderbird_esr115
thunderbird_esr140
firefox-esr115
firefox-esr140
firefox-esr153
firefox106
firefox152
firefox153
firefox154
---
QA Whiteboard:
---
Has STR:
---
Change Request:
---
Bug Flags:
Signature:
None
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 Reporter
 

 
 


 

 
 

 Description
 

 •
 
3 years ago
 

 		
 


 
 


 
 
A resolution was made for csswg-drafts/#3664.


[resize-observer] The initial size of ResizeObservation


    

  • RESOLVED: When first observing an element with ResizeObserver, lastReportedSize gets initialized with a -1 x -1 size
    • 



Discussion.


dshin: maybe you'd be interested to take this, since you've been in the ResizeObserver neighborhood recently?


Summary: [resize-observer] The initial size of ResizeObservation → [resize-observer] When first observing an element with ResizeObserver, lastReportedSize should get initialized with a -1 x -1 size

 

 

 
 
 
 Assignee
 
 
 

 

 
 

 Updated
 

 •
 
3 years ago
 

 		
 

 

 
Assignee: nobody → dshin
Status: NEW → ASSIGNED

 Attachment #9291778 -
 Attachment description: Bug 1785305: Resize Observer's last reported size is -1x-1 initially. r=#layout-reviewers → Bug 1785305: Set Resize Observer's last reported size to -1x-1 initially. r=#layout-reviewers

 
 

 

 
 

 
 

 
 


 

 
 

 Comment 4
 

 •
 
3 years ago
 

 		
 


 
 


 
 
Pushed by dshin@mozilla.com:
https://hg.mozilla.org/integration/autoland/rev/14e81415cae1
Set Resize Observer's last reported size to -1x-1 initially. r=emilio

 
 

 

 
 

 
 

 
 


 

 
 

 Comment 5
 

 •
 
3 years ago
 

 		
 


 

 bugherder
 
 
 

 


 
 
Status: ASSIGNED → RESOLVED
Closed: 3 years ago
Resolution: --- → FIXED
Target Milestone: --- → 106 Branch
Created web-platform-tests PR https://github.com/web-platform-tests/wpt/pull/35745 for changes under testing/web-platform/tests

 
 
 
 
 


 
Some anonymous children are important for properly sizing their parents

even when those parents hide content with content-visibility. This is

shown by regressions in the proper layout of some form elements with

content-visibility.


This change introduces a more conservative approach for avoiding layout

of hidden content. Instead of leaving all children dirty during reflow,

reflow anonymous frames (and nsComboboxDisplayFrame, a specialized kind

of anonymous frame). This change means that frames may only lay out some

of their children, so it must introduce some more changes to assumptions

during line layout.


In addition, this change renames content-visibility related methods in

nsIFrame in order to make it more obvious what they do.


Wrong bug #?


Flags: needinfo?(mrobinson)

 Attachment #9293157 -
 Attachment is obsolete: true
(In reply to Emilio Cobos Álvarez (:emilio) from comment #8)




Wrong bug #?




Yes. Sorry. I'm not sure what happened there.


Flags: needinfo?(mrobinson)

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