294070 - Selection of text reduces the font size of the first letter if :first-letter is set

Status: NEW

(Core :: Layout: Block and Inline, defect)

Description

[Dan]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.0; fr; rv:1.8b2+) Gecko/20050512
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; fr; rv:1.8b2) Gecko/20050512

If you select text with the latest trunk (rv:1.8b2) Gecko/20050512) with 
first-letter in the style of a paragraph or a division, the font size is reduced

Reproducible: Always



Expected Results:  
highlight the text without modification

Comment 1

[Dan]

Attachment: selection and first-letter problem

Comment 2

[Hermann Schwab]

Attachment: colorful testcase

colored background on div and first-letter shows reduced height of character
background when first letter is set. This gives the illusion of shrinking
font-size if character is selected.

Comment 3

[Hermann Schwab]

confirming Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.8b2) Gecko/20050513

It can also be seen doing selections on testcase of 
Bug 275138 {inc} ::first-letters are too big and overlap 
https://bugzilla.mozilla.org/attachment.cgi?id=169012

Comment 4

[Justin Wood (:Callek)]

In my build
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8b2) Gecko/20050513

I do not see any reduction of text[font]-size, though I do see a smaller
selection "size"/area.

Comment 5

[Boris Zbarsky [:bzbarsky]]

The first-letter font doesn't change.  Its background area is in fact not the
full font metrics height, but this is sort of by design... at least for floated
first-letters.  rbs, could we somehow change the fix for bug 21616 to only kick
in when the first-letter is floated?

Comment 6

[Boris Zbarsky [:bzbarsky]]

Maybe we can store the line layouts first-letter frame in the TextReflowData,
and then look at its display value in this code?

Comment 7

[rbs]

Yeah, it is by design... a trade-off between a largish line-spacing (on the
whole line...) or a smallish background area (on just the first letter).

I for one prefer the smallish background.

Reporter, Hermann Schwab, Justin Wood, try "font-size: 300%" on the first-letter
style. Then see what your think about an old build (with the largish
line-spacing) or a more recent build (with a smallish background area).

Comment 8

[Boris Zbarsky [:bzbarsky]]

Ah, right.  It's also an issue for non-floated first-letter, so nevermind
comment 5 and 6.