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[Bug 11207] New: Make track element additions technology neutral

From: <bugzilla@jessica.w3.org>
Date: Wed, 03 Nov 2010 11:14:18 +0000
To: public-html-bugzilla@w3.org
Message-ID: <bug-11207-2486@http.www.w3.org/Bugs/Public/>
http://www.w3.org/Bugs/Public/show_bug.cgi?id=11207

           Summary: Make track element additions technology neutral
           Product: HTML WG
           Version: unspecified
          Platform: All
        OS/Version: Windows NT
            Status: NEW
          Keywords: a11y, media
          Severity: normal
          Priority: P1
         Component: HTML5 spec (editor: Ian Hickson)
        AssignedTo: ian@hixie.ch
        ReportedBy: sean.hayes@microsoft.com
         QAContact: public-html-bugzilla@w3.org
                CC: mike@w3.org, public-html-wg-issue-tracking@w3.org,
                    public-html@w3.org


Changes required to remove webSRT specifics.

************************* 
Changes to Section 4.8.9

========================= 
Remove: 

"If the elements's track URL identifies a WebSRT resource, and the element's
kind attribute is not in the metadata state, then the WebSRT file must be a
WebSRT file using cue text."

========================= 
Replace:
"If the elements's track URL identifies a WebSRT resource, then the charset
attribute may be specified. If the attribute is set, its value must be a valid
character encoding name, must be an ASCII case-insensitive match for the
preferred MIME name for that encoding, and must match the character encoding of
the WebSRT file. [IANACHARSET]"

with:

"If the elements's track URL identifies a timed text resource, then the charset
attribute may be specified. If the attribute is set, its value must be a valid
character encoding name, must be an ASCII case-insensitive match for the
preferred MIME name for that encoding, and must match the character encoding of
the referenced file. [IANACHARSET]"


************************* 
Changes to Section 4.8.10.8 


========================= 
Remove:

"(e.g., for timed tracks based on WebSRT, the rules for updating the display of
WebSRT timed tracks)."


************************* 
Changes to Section 4.8.10.10 

========================= 
Replace:
"A writing direction, "

with:
"The primary writing direction, "


========================= 
Remove  (to be defined in WebSRT):
"If the writing direction is horizontal, then line position percentages are
relative to the height of the video, and text position and size percentages are
relative to the width of the video.

Otherwise, line position percentages are relative to the width of the video,
and text position and size percentages are relative to the height of the
video."

=========================
Remove:
"(e.g. the WebSRT parser if the Content Type metadata is text/srt) "

========================= 
Remove:
"(e.g., for WebSRT, the rules for updating the display of WebSRT timed
tracks)."


========================= 
Remove  (to be defined in WebSRT):
"A snap-to-lines flag 
A boolean indicating whether the line's position is a line position (positioned
to a multiple of the line dimensions of the first line of the cue), or whether
it is a percentage of the dimension of the video."

========================= 
Remove  (to be defined in WebSRT):

"A line position 
Either a number giving the position of the lines of the cue, to be interpreted
as defined by the writing direction and snap-to-lines flag of the cue, or the
special value auto, which means the position is to depend on the other active
tracks.

A text position 
A number giving the position of the text of the cue within each line, to be
interpreted as a percentage of the video, as defined by the writing direction."

========================= 
Remove  (to be defined in WebSRT):

"An alignment 
An alignment for the text of each line of the cue, either start alignment (the
text is aligned towards its start side), middle alignment (the text is aligned
centered between its start and end sides), end alignment (the text is aligned
towards its end side). Which sides are the start and end sides depends on the
Unicode bidirectional algorithm and the writing direction. [BIDI]"

========================= 
Remove :

"(e.g., for timed tracks based on WebSRT, the rules for updating the display of
WebSRT timed tracks)."

========================= 
Remove :
"(so e.g. for cues from a WebSRT file, that would be the order in which the
cues were listed in the file)"


************************* 
Remove section "4.8.10.10.4 Guidelines for exposing cues in various formats as
timed track cues" in its entirety.


************************* 
interface TimedTrackCue


========================= 
Replace

"[Constructor(in DOMString id, in double startTime, in double endTime, in
DOMString text, in optional DOMString settings, in optional DOMString voice, in
optional boolean pauseOnExit)]"

with:

[Constructor(in DOMString id, in double startTime, in double endTime, in
DOMString text, in optional CueSettings settings, in optional DOMString voice,
in optional boolean pauseOnExit)]


========================= 
Replace:
"
  readonly attribute DOMString direction;
  readonly attribute boolean snapToLines;
  readonly attribute long linePosition;
  readonly attribute long textPosition;
  readonly attribute long size;
  readonly attribute DOMString alignment;
"

With:

"
   readonly attribute CueSettings settings
"

where CueSettings is to be defined an apbstract base type which can be
subclassed for specific timed text formats


========================= 
Replace:
"The settings argument is a string in the format of WebSRT cue settings. If
omitted, the empty string is assumed."

With:

"The settings argument is a sub class of the CueSettings type."

========================= 
Remove:

"cue . snapToLines 
Returns true if the timed track cue snap-to-lines flag is set, false otherwise.

cue . linePosition 
Returns the timed track cue line position. In the case of the value being auto,
the appropriate default is returned.

cue . textPosition 
Returns the timed track cue text position.

cue . size 
Returns the timed track cue size.

cue . alignment 
Returns a string representing the timed track cue alignment, as follows:

If it is start alignment 
The string "start".

If it is middle alignment 
The string "middle".

If it is end alignment 
The string "end".

"

========================= 
Replace:

"Let cue's timed track cue text be the value of the text argument, and let the
rules for its interpretation be the WebSRT cue text parsing rules, the WebSRT
cue text rendering rules, and the WebSRT cue text DOM construction rules.

Let cue's timed track cue writing direction be horizontal.

Let cue's timed track cue snap-to-lines flag be true.

Let cue's timed track cue line position be auto.

Let cue's timed track cue text position be 50.

Let cue's timed track cue size be 100.

Let cue's timed track cue alignment be middle alignment.

Let input be the string given by the settings argument.

Let position be a pointer into input, initially pointing at the start of the
string.

Parse the WebSRT settings for cue."

with
"Let cue's timed track cue text be the value of the text argument.

 Let cue's settings be determined in a format specific manner from the settings
argument"

========================= 
Remove:
"The snapToLines attribute must return true if the timed track cue
snap-to-lines flag of the timed track cue that the TimedTrackCue object
represents is set; or false otherwise.

The linePosition attribute must return the timed track cue line position of the
timed track cue that the TimedTrackCue object represents, if that value is
numeric. Otherwise, the value is the special value auto; if the timed track cue
snap-to-lines flag of the timed track cue that the TimedTrackCue object
represents is not set, the attribute must return the value 100; otherwise, it
must return the value returned by the following algorithm:

Let cue be the timed track cue that the TimedTrackCue object represents.

If cue is not associated with a timed track, return -1 and abort these steps.

Let track be the timed track that the cue is associated with.

Let n be the number of timed tracks whose timed track mode is showing and that
are in the media element's list of timed tracks before track.

Return n.

The textPosition attribute must return the timed track cue text position of the
timed track cue that the TimedTrackCue object represents.

The size attribute must return the timed track cue size of the timed track cue
that the TimedTrackCue object represents.

The alignment attribute must return the timed track cue alignment of the timed
track cue that the TimedTrackCue object represents."

========================= 
Remove:
"(For example, for WebSRT, those rules are the WebSRT cue text parsing rules
and the WebSRT cue text DOM construction rules.)"


***********************
MutableTrack

========================= 
Replace:
"Create a new timed track, and set its timed track kind to kind, its timed
track label to label, its timed track language to language, its timed track
readiness state to the timed track loaded state, its timed track mode to the
timed track hidden mode, and its timed track list of cues to an empty list,
associated with the rules for updating the display of WebSRT timed tracks as
its rules for updating the timed track rendering."

"Create a new timed track, and set its timed track kind to kind, its timed
track label to label, its timed track language to language, its timed track
readiness state to the timed track loaded state, its timed track mode to the
timed track hidden mode, and its timed track list of cues to an empty list."

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Received on Wednesday, 3 November 2010 11:14:20 GMT

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