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Accessibility Tree と Accessibility Object Model
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grgr-dkrk
February 04, 2020
Programming
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Accessibility Tree と Accessibility Object Model
TBD
grgr-dkrk
February 04, 2020
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Transcript
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͢͜ͱ "DDFTTJCJMJUZ5SFFͷ͓ ʮݕ౼தʯͳؚ͓Έ·͢
"DDFTTJCJMJUZ BZ ͱ ϚγϯϦʔμϒϧ ༷ʑͳ6"ʢɺεΫϦʔϯϦʔμʔͳͲͷࢧԉٕज़ʣ ͔ΒಡΈऔΓͰ͖Δ͜ͱ ΞΫηγϒϧ ୭͕ͲΜͳঢ়ଶɺڥͰΞΫηεՄೳͳ͜ͱ
ͭͷݪଇ1063 ‣ 1FSDFJWBCMFʢ֮Մೳʣ ‣ 0QFSBCMFʢૢ࡞Մೳʣ ‣ 6OEFSTUBOEBCMFʢཧղ͍͢͠ʣ ‣ 3PCVTUʢݎ࿚Ͱ͋Δʣ IUUQTXXXXPSH8"*8$"(6OEFSTUBOEJOHJOUSP
8FC$POUFOU"DDFTTJCJMJUZ(VJEFMJOFT 8$"(
ͦΕ͓͖ͯ͞ ຊ
"DDFTTJCJMJUZ5SFF ΞΫηγϏϦςΟͷใΛΓऔΓ͢ΔͨΊͷπϦʔ %0.πϦʔΛͱʹੜ ߋ৽͞ΕΔ ࣮࣭%0.ͷ4VCTFU
IUUQTHJUIVCDPN8*$(BPNCMPCHIQBHFTFYQMBJOFSNEΑΓ ࢧԉٕज़ "5 ͱͷΓͱΓ
‣ /BNF ‣ %FTDSJQUJPO ‣ 3PMF ‣ 4UBUF ͳͲؚ͕·ΕΔ "DDFTTJCJMJUZ0CKFDU
"DDFTTJCJMJUZ/PEF
"DDFTTJCJMJUZੲ (6*͕ग़࢝Ίͨ͜Ζ ඳը͞Εͨ༰ΛಡΈऔ͍ͬͯͨ P⒎TDSFFONPEFM “Making the Talk” Richard Schwerdtfeger 1991,
ftp://service.boulder.ibm.com/sns/sr-os2/sr2doc/guitalk.txt
"DDFTTJCJMJUZ"1* ‣ .4"" ‣ *"DDFTTJCMF ‣ 6*"&YQSFTT ‣ /4"DDFTTJCJMJUZ ‣
6*"DDFTTJCJMJUZ
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ಛ
"DDFTTJCJMJUZ5SFFͷΞΫηε +BWB4DSJQUͰͷΞΫηε͕ࠔ 1VQQFUFFSϒϥβͷ*OTQFDUPSͳͲ͏ import * as puppeteer from 'puppeteer' ;(async
() => { const browser = await puppeteer.launch() const page = await browser.newPage() await page.goto('http://localhost:1234/') const snapshot = await page.accessibility.snapshot() console.info(snapshot) await browser.close() })()
ηϚϯςΟοΫͰͳ͍ཁૉ SPMFBSJBଐੑͰϚοϐϯάՄೳ ͨͩ͠ωΠςΟϒཁૉͷڍಈ࠶ݱ͠ͳ͍ <div role="dialog" aria-labelledby="dialogTitle" aria-describedby="dialogDesc" > <h1 id="dialogTitle">Dialog</h1>
<p id="dialogDesc">આ໌Ͱ͢Α</p> </div> 8"*"3*" 8FC"DDFTTJCJMJUZ*OJUJBUJWFr"DDFTTJCMF3JDI*OUFSOFU"QQMJDBUJPOT
8"*"3*" 4UBUFΛཧ͢ΔͨΊʹΘΕΔ +BWB4DSJQU$44ͱΈ߹ΘͤΔඞཁ͕͋Δ <div role="dialog" aria-hidden="true" aria-labelledby="dialogTitle" aria-describedby="dialogDesc" > <h1
id="dialogTitle">Dialog</h1> <p id="dialogDesc">આ໌Ͱ͢Α</p> </div> 8FC"DDFTTJCJMJUZ*OJUJBUJWFr"DDFTTJCMF3JDI*OUFSOFU"QQMJDBUJPOT
*%3&' ଞཁૉͱͷؔΛ*%Ͱࣔ͢ ؔ࿈ཁૉ͕"DDFTTJCJMJUZ5SFFʹग़ͯͳ͍ͱ͍͚ͳ͍ 4IBEPX%0.ӽ͠μϝ <img src="grgr-dkrk.jpg" alt="͔Θ͍͍ΞΠίϯ" aria-describedby="desc" /> {false
&& <p id="desc">kawaii</p>}
ϑϥοτԽ ඞཁͳ͍ͱஅ͞Εͨཁૉɺ $44ͰӅ͞ΕΔཁૉͳͲআ֎͞ΕΔ͜ͱ͕͋Δ ج४όϥόϥ <figure> <img src="grgr-dkrk.jpg" alt="͔Θ͍͍ΞΠίϯ" /> </figure>
<div> <div> <div> <div> <div> <img src="grgr-dkrk.jpg" alt="͔Θ͍͍ΞΠίϯ" /> </div> </div> </div> </div> </div>
ෆదͳSPMFͷम෮ ෆదͳSPMF म෮͞ΕΔ͜ͱ͕͋Δ <ul role="cell"> <li role="table">Կ͔</li> </ul> HFOFSJDSPMF"3*"͔Β
"DDFTTJCJMJUZ5SFF ҋͳͱ͜Ζ
ҋͦͷ Ұੜ%0."45ͱઓ͏ςετπʔϧ "YF 1BZ FTMJOUQMVHJOKTYBZ 8"7&
ҋͦͷ %0.ʹഊͯ͠ ΞΫηε͕ࠔͳ$BOWBT8FC93ίϯςϯπ
ҋͦͷ ΈΜͳେ͖ࠩҟ $ISPNF 'JSFGPY
"DDFTTJCJMJUZ5SFF໊ͬͯલͷׂʹ શવΞΫηγϒϧ͡Όͳ͍ʜ ݱঢ়ͷ
"DDFTTJCJMJUZ 0CKFDU.PEFM "0.
"0.ͱ +BWB4DSJQUͰ"DDFTTJCJMJUZ5SFFʹ ΞΫηεͰ͖ΔΑ͏ʹؤுΔऔΓΈ ৭ʑ͋ͬͯෳͷϢʔεέʔεʹରԠ͢Δ ҊΛ૯শ͢Δͷʹͳͬͨ https://github.com/WICG/aom
"0.1IBTFT B"3*"3FqFDUJPO C$VTUPN&MFNFOU4FNBOUJDT 6TFS"DUJPO&WFOUT 7JSUVBM"DDFTTJCJMJUZ/PEFT $PNQVUFE"DDFTTJCJMJUZ5SFF
8"*"3*"͔Β BSJBଐੑ͕*%-ଐੑʹͳΔ const elm = document.getElementById('foo') // before elm.setAttribute('aria-hidden', 'true')
// after elm.ariaHidden = true B"SJB3FqFDUJPO
*%3&'Λ+BWB4DSJQUͰ੍ޚ͢Δ 4IBEPX%0.ͷڥքΛӽ͑ΒΕΔ ߤͯ͠Δ C$VTUPN&MFNFOU4FNBOUJDT const input = comboBox.shadowRoot.querySelector('input') const optionList
= comboBox.querySelector('custom-optionlist') input.activeDescendantElement = optionList.firstChild ίʔυIUUQTXJDHHJUIVCJPBPNFYQMBJOFSIUNM
ࢧԉٕज़ʹ͚ͨ*OQVU&WFOUͷՃ ରԠ͢Δ%0.ͷΠϕϯτΛ྆ํൃՐ͢Δ༧ఆ ࢧԉٕज़༻ऀͷϓϥΠόγʔΛอޢ͢ΔͨΊ 6TFS"DUJPO&WFOUT slider.addEventListener('increment', (ev: InputEvent) => { //
ev.key === 'ArrowUp' ൃՐ͢ΔΑͱ͍͏Ҋ })
ࢧԉٕज़͚ͷԾ/PEFΛ࡞Δ ΄ͱΜͲ4IBEPX%0. const canvas = document.getElementById('canvas') canvas.attachAccessibleRoot() const button =
canvas.accessibleRoot.appendChild(new AccessibleNode()) button.role = 'button' button.offsetLeft = '30px' button.offsetTop = '20px' button.offsetWidth = '400px' button.offsetHeight = '300px' button.focusable = true 7JSUVBM"DDFTTJCJMJUZ/PEFT
ܭࢉࡁͷ"DDFTTJCJMJUZ5SFFʹΞΫηε͢Δ &YQFSJNFOUBM͚ͩͲҰ෦ͷϒϥβͰ࣮ߦՄ window.addEventListener('load', async () => { const ComputedAccessibleNode =
ɹɹawait window.getComputedAccessibleNode(elm) console.log(ComputedAccessibleNode) }) $PNQVUFE"DDFTTJCJMJUZ5SFF
$PNQVUFE"DDFTTJCJMJUZ5SFF
՝ ϒϥβؒͰඪ४Խ͞Ε͍ͯͳ͍"DDFTTJCJMJUZ5SFFʹରͯ͠ ޓੑΛҡ࣋ͭͭ͠Ұ؏ੑͷ͋ΔͷΛެ։͢Δඞཁ͕͋Δ ͳͲ
w "DDFTTJCJMJUZ5SFF͕ΞΫηγϒϧͳΓऔΓΛՄೳʹ͢Δ w ͦͷ"DDFTTJCJMJUZ5SFFࣗମશવΞΫηγϒϧ͡Όͳ͍ w "0.͕վળͷୈҰา ·ͱΊ
։ൃऀʹ ΞΫηγϒϧͳ ମݧΛ
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