[Webkit-unassigned] [Bug 139582] New: AX: Anonymous RenderMathMLOperators are not exposed to the accessibility tree
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Fri Dec 12 04:04:44 PST 2014
https://bugs.webkit.org/show_bug.cgi?id=139582
Bug ID: 139582
Summary: AX: Anonymous RenderMathMLOperators are not exposed to
the accessibility tree
Classification: Unclassified
Product: WebKit
Version: 528+ (Nightly build)
Hardware: All
OS: All
Status: NEW
Severity: Normal
Priority: P2
Component: MathML
Assignee: webkit-unassigned at lists.webkit.org
Reporter: fred.wang at free.fr
Depends on: 124838
Blocks: 124836
If we compare
<mfenced open="(" separators="," close=")"><mi>x</mi><mi>y</mi></mfenced>
and
<mrow><mo>(</mo><mi>x</mi><mo>,</mo><mi>y</mi><mo>)</mo></mrow>
we see that the render trees only differ by the fact that RenderMathMLOperator are anonymous in the former case but not in the latter:
RenderBlock {HTML} at (0,0) size 800x600
RenderBody {BODY} at (8,8) size 784x584
RenderBlock (anonymous) at (0,0) size 784x16
RenderMathMLMath {math} at (0,0) size 56x16 [padding: 0 1 0 1]
RenderMathMLFenced {mfenced} at (1,0) size 54x16
RenderMathMLOperator (anonymous) at (0,0) size 14x16
RenderMathMLBlock (anonymous, flex) at (0,0) size 6x16
RenderBlock (anonymous) at (0,0) size 6x16
RenderText at (0,-45) size 6x106
text run at (0,-45) width 6: "("
RenderMathMLToken {mi} at (14,5) size 10x8 [padding: 0 2 0 0]
RenderMathMLBlock (anonymous, flex) at (0,0) size 8x8
RenderBlock (anonymous) at (0,0) size 8x8
RenderText {#text} at (0,-50) size 8x106
text run at (0,-50) width 8: "x"
RenderMathMLOperator (anonymous) at (23,10) size 8x6
RenderMathMLBlock (anonymous, flex) at (0,0) size 4x6
RenderBlock (anonymous) at (0,0) size 4x6
RenderText at (0,-55) size 4x106
text run at (0,-55) width 4: ","
RenderMathMLToken {mi} at (30,5) size 10x11 [padding: 0 2 0 0]
RenderMathMLBlock (anonymous, flex) at (0,0) size 8x11
RenderBlock (anonymous) at (0,0) size 8x11
RenderText {#text} at (0,-50) size 8x106
text run at (0,-50) width 8: "y"
RenderMathMLOperator (anonymous) at (39,0) size 15x16
RenderMathMLBlock (anonymous, flex) at (0,0) size 6x16
RenderBlock (anonymous) at (0,0) size 6x16
RenderText at (0,-45) size 6x106
text run at (0,-45) width 6: ")"
RenderText {#text} at (0,0) size 0x0
RenderBlock {P} at (0,32) size 784x17
RenderText {#text} at (0,0) size 175x17
text run at (0,0) width 175: "-----------------------------------"
RenderBlock (anonymous) at (0,65) size 784x16
RenderMathMLMath {math} at (0,0) size 56x16 [padding: 0 1 0 1]
RenderMathMLRow {mrow} at (1,0) size 54x16
RenderMathMLOperator {mo} at (0,0) size 14x16
RenderMathMLBlock (anonymous, flex) at (0,0) size 14x16
RenderBlock (anonymous) at (0,0) size 6x16
RenderText at (0,-45) size 6x106
text run at (0,-45) width 6: "("
RenderMathMLToken {mi} at (14,5) size 10x8 [padding: 0 2 0 0]
RenderMathMLBlock (anonymous, flex) at (0,0) size 8x8
RenderBlock (anonymous) at (0,0) size 8x8
RenderText {#text} at (0,-50) size 8x106
text run at (0,-50) width 8: "x"
RenderMathMLOperator {mo} at (23,10) size 8x6
RenderMathMLBlock (anonymous, flex) at (0,0) size 4x6
RenderBlock (anonymous) at (0,0) size 4x6
RenderText at (0,-55) size 4x106
text run at (0,-55) width 4: ","
RenderMathMLToken {mi} at (30,5) size 10x11 [padding: 0 2 0 0]
RenderMathMLBlock (anonymous, flex) at (0,0) size 8x11
RenderBlock (anonymous) at (0,0) size 8x11
RenderText {#text} at (0,-50) size 8x106
text run at (0,-50) width 8: "y"
RenderMathMLOperator {mo} at (39,0) size 15x16
RenderMathMLBlock (anonymous, flex) at (0,0) size 14x16
RenderBlock (anonymous) at (0,0) size 6x16
RenderText at (0,-45) size 6x106
text run at (0,-45) width 6: ")"
The point of bug 124838 was to refactor the code to get cleaner and more consistent render trees. However, this change broke platform/mac/accessibility/mathml-elements.html
It seems that the code added into AccessibilityRenderObject::isIgnoredElementWithinMathTree to force exposure of anonymous render operators into the accessibility tree didn't help:
if (m_renderer->isAnonymous()) {
if (m_renderer->isRenderMathMLOperator())
return false;
...
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