[New Multicolumn] Add RenderMultiColumnSpannerSet.
This is in preparation for column-span:all support. This CL puts basic set renderer insertion needed by column-span:all into place. Full support for set management (cope with dynamic changes after inital layout, etc.) and actual support for layout will be introduced in follow-up CLs. Likewise for layout tests. Each column-span:all renderer needs a corresponding RenderMultiColumnSpannerSet. This means that if there's column content preceding and following the spanner, we need a RenderMultiColumnSet both before and after it (while, without spanners, there'd never be any need for more than one column set). Some extra attention is required when inserting flow thread descendants now, because we need to figure out if the renderer inserted should trigger creation of a new column set or a spanner set. Wrote some unit tests. Layout tests not possible at this time, since this CL has no (intentional) web-facing changes. BUG=347325 Review URL: https://codereview.chromium.org/688703003 git-svn-id: svn://svn.chromium.org/blink/trunk@184887 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Showing
This diff is collapsed.
Please register or sign in to comment