Layout debugger's paged mode uses `nsPresContext::eContext_PageLayout` [1], so `presContext->IsPaginated()` [2] should be true per [3]. It must be a unconstrained `aReflowInput.availSize.BSize(wm)` that makes `isPaginated` in `nsTableFrame::ReflowChildren()` become false. [1] https://searchfox.org/mozilla-central/rev/ba4fab1cc2f1c9c4e07cdb71542b8d441707c577/layout/base/nsDocumentViewer.cpp#4056-40573 [2] https://searchfox.org/mozilla-central/rev/ba4fab1cc2f1c9c4e07cdb71542b8d441707c577/layout/tables/nsTableFrame.cpp#2888 [3] https://searchfox.org/mozilla-central/rev/ba4fab1cc2f1c9c4e07cdb71542b8d441707c577/layout/base/nsPresContext.cpp#194
Bug 1364144 Comment 4 Edit History
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Layout debugger's paged mode uses `nsPresContext::eContext_PageLayout` [1], so `presContext->IsPaginated()` [2] should be true per [3]. It must be an unconstrained `aReflowInput.availSize.BSize(wm)` that makes `isPaginated` in `nsTableFrame::ReflowChildren()` become false. [1] https://searchfox.org/mozilla-central/rev/ba4fab1cc2f1c9c4e07cdb71542b8d441707c577/layout/base/nsDocumentViewer.cpp#4056-40573 [2] https://searchfox.org/mozilla-central/rev/ba4fab1cc2f1c9c4e07cdb71542b8d441707c577/layout/tables/nsTableFrame.cpp#2888 [3] https://searchfox.org/mozilla-central/rev/ba4fab1cc2f1c9c4e07cdb71542b8d441707c577/layout/base/nsPresContext.cpp#194