[Gecko Bug 1920646] part 1: Make HTMLEditor paste/drop things as plaintext when `contenteditable=plaintext-only
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…teditable=plaintext-only Chrome sets `beforeinput.data` instead of `beforeinput.dataTransfer`, but Input Events Level 2 spec defines that browsers should set `dataTransfer` when **contenteditable** [1]. Therefore, the new WPT expects `dataTransfer`. However, it's unclear that the `dataTransfer` should have `text/html` or only `text/plain`. From web apps point of view, `text/html` data may make them serialize the rich text format to plaintext without any dependencies of browsers and OS. On the other hand, they cannot distinguish whether the user tries to paste with or without formatting when `contenteditable=true`. Therefore, I filed a spec issue for this. We need to be back later about this issue. 1. https://w3c.github.io/input-events/#overview 2. w3c/input-events#162 Differential Revision: https://phabricator.services.mozilla.com/D223908 bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1920646 gecko-commit: 2e3f866560e2c750fe1e4469b81d89f10bffc6a1 gecko-reviewers: m_kato
…converted from given source Differential Revision: https://phabricator.services.mozilla.com/D223909 bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1920646 gecko-commit: 39f1a092f31fc2950ea974b4df5e8710f9bf500d gecko-reviewers: m_kato
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Chrome sets
beforeinput.datainstead ofbeforeinput.dataTransfer, butInput Events Level 2 spec defines that browsers should set
dataTransferwhencontenteditable [1]. Therefore, the new WPT expects
dataTransfer.However, it's unclear that the
dataTransfershould havetext/htmlor onlytext/plain. From web apps point of view,text/htmldata may make themserialize the rich text format to plaintext without any dependencies of browsers
and OS. On the other hand, they cannot distinguish whether the user tries to
paste with or without formatting when
contenteditable=true. Therefore, Ifiled a spec issue for this. We need to be back later about this issue.
dataTransfermay havetext/htmlwhen pasting rich text intocontenteditable=plaintext-onlyw3c/input-events#162Differential Revision: https://phabricator.services.mozilla.com/D223908
bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1920646
gecko-commit: 2e3f866560e2c750fe1e4469b81d89f10bffc6a1
gecko-reviewers: m_kato