• antti@apple.com's avatar
    Remove unnecessary sibling text renderers after attach · eb42f534
    antti@apple.com authored
    https://bugs.webkit.org/show_bug.cgi?id=120953
    
    Source/WebCore: 
    
    Reviewed by the Swedish Review Team: Anders Carlsson and Andreas Kling.
    
    The current createTextRenderersForSiblingsAfterAttachIfNeeded code only adds text renderers, never removes them. 
    Style changes can go either way.
            
    The patch causes no visible changes in rendered output. The whitespace nodes that it affects are leftovers that
    have no rendering effect. However it does change results of many dumpAsText and render tree dump based layout
    tests as unnecessary text nodes disappear.
            
    The main goal is to make results of dynamic attach and parsing time attach produce more similar results. As
    an added bonus we get slightly simpler rendering trees.
            
    Rendering tree dumps show us still leaving behind empty anonymous blocks when removing whitespace text nodes.
    Those should collapse away too.
    
    * style/StyleResolveTree.cpp:
    (WebCore::Style::reattachTextRenderersForWhitespaceOnlySiblingsAfterAttachIfNeeded):
            
        Allow the code both create and remove text renderers.
        Tighten to bail out faster if case is not the exact one that matters.
        Use NodeRenderingTraversal to mirror textRendererIsNeeded.
        Renamed for clarity.
    
    (WebCore::Style::updateTextRendererAfterContentChange):
    (WebCore::Style::resolveLocal):
    (WebCore::Style::updateTextStyle):
    (WebCore::Style::attachRenderTree):
    
    LayoutTests: 
    
    Reviewed by Anders Carlsson and Andreas Kling.
    
    A bunch of spaces and empty lines disappear from dumpAsText test results.
    Empty RenderTexts disapper from render tree dumps.
    
    * css3/flexbox/flex-flow-auto-margins-expected.txt:
    * css3/flexbox/flex-flow-auto-margins-no-available-space-expected.txt:
    * css3/flexbox/flex-flow-border-expected.txt:
    * css3/flexbox/flex-flow-margins-auto-size-expected.txt:
    * css3/flexbox/flex-flow-margins-expected.txt:
    * css3/flexbox/flex-flow-orientations-expected.txt:
    * css3/flexbox/flex-flow-overflow-expected.txt:
    * css3/flexbox/flex-flow-padding-expected.txt:
    * css3/flexbox/flexbox-ignore-firstLetter-expected.txt:
    * css3/flexbox/inline-flexbox-ignore-firstLine-expected.txt:
    * css3/flexbox/intrinsic-min-width-applies-with-fixed-width-expected.txt:
    * editing/selection/focus-crash-expected.txt:
            
        A few frame based tests also gain an extra space from alrgorithm fixes in creation direction.
    
    * editing/style/toggle-style-bold-italic-expected.txt:
    * editing/style/toggle-style-bold-italic-mixed-editability-expected.txt:
    * fast/block/float/intruding-float-not-removed-writing-mode-expected.txt:
    * fast/css/getComputedStyle/getComputedStyle-resolved-values-expected.txt:
    * fast/css/import-style-update-expected.txt:
    * fast/css/positioned-overflow-scroll-expected.txt:
    * fast/dom/HTMLLinkElement/resolve-url-on-insertion-expected.txt:
    * fast/dom/search-shadow-host-crash-expected.txt:
    * fast/dynamic/inline-to-block-crash-expected.txt:
    * fast/events/input-element-display-none-in-dragleave-crash-expected.txt:
    * fast/flexbox/intrinsic-min-width-applies-with-fixed-width-expected.txt:
    * fast/forms/select-listbox-focus-displaynone-expected.txt:
    * fast/frames/repaint-display-none-crash-expected.txt:
    * fast/inline/inline-with-empty-inline-children-expected.txt:
    * fast/inline/out-of-flow-objects-and-whitespace-after-empty-inline-expected.txt:
    * fast/repaint/text-in-relative-positioned-inline-expected.txt:
    * fast/replaced/computed-image-width-with-percent-height-and-fixed-ancestor-expected.txt:
    * fast/replaced/computed-image-width-with-percent-height-and-fixed-ancestor-vertical-lr-expected.txt:
    * fast/replaced/preferred-widths-expected.txt:
    * fast/spatial-navigation/snav-tiny-table-traversal-expected.txt:
    * fast/table/min-max-width-preferred-size-expected.txt:
    * fast/xsl/import-non-document-node-expected.txt:
    * fullscreen/full-screen-fixed-pos-parent-expected.txt:
    * http/tests/appcache/auth-expected.txt:
    * http/tests/cache/subresource-expiration-1-expected.txt:
    * http/tests/cache/subresource-expiration-2-expected.txt:
    * http/tests/xmlhttprequest/send-array-buffer-expected.txt:
    * http/tests/xmlhttprequest/send-data-view-expected.txt:
    * http/tests/xmlhttprequest/send-undefined-and-null-expected.txt:
    * platform/mac/editing/input/firstrectforcharacterrange-plain-expected.txt:
    * platform/mac/editing/input/firstrectforcharacterrange-styled-expected.txt:
    * platform/mac/editing/pasteboard/4989774-expected.txt:
    * platform/mac/editing/pasteboard/paste-match-style-001-expected.txt:
    * platform/mac/editing/selection/caret-ltr-2-expected.txt:
    * platform/mac/editing/selection/caret-ltr-2-left-expected.txt:
    * platform/mac/editing/selection/caret-ltr-expected.txt:
    * platform/mac/editing/selection/caret-ltr-right-expected.txt:
    * platform/mac/editing/selection/caret-rtl-2-expected.txt:
    * platform/mac/editing/selection/caret-rtl-2-left-expected.txt:
    * platform/mac/editing/selection/caret-rtl-expected.txt:
    * platform/mac/editing/selection/caret-rtl-right-expected.txt:
    * platform/mac/editing/selection/vertical-rl-ltr-extend-line-backward-wrap-expected.txt:
    * platform/mac/editing/selection/vertical-rl-ltr-extend-line-forward-wrap-expected.txt:
    * platform/mac/editing/spelling/autocorrection-in-textarea-expected.txt:
    * platform/mac/editing/style/style-boundary-005-expected.txt:
    * platform/mac/fast/AppleScript/001-expected.txt:
    * platform/mac/fast/AppleScript/date-expected.txt:
    * platform/mac/fast/forms/formmove3-expected.txt:
    * platform/mac/fast/forms/input-align-image-expected.txt:
    * platform/mac/fast/forms/preserveFormDuringResidualStyle-expected.txt:
    * platform/mac/fast/invalid/003-expected.txt:
    * platform/mac/fast/text/attributed-substring-from-range-002-expected.txt:
    * platform/mac/tables/mozilla/bugs/bug647-expected.txt:
    * userscripts/user-script-all-frames-expected.txt:
    * userscripts/user-script-top-frame-only-expected.txt:
            
        Here too.
    
    
    
    git-svn-id: http://svn.webkit.org/repository/webkit/trunk@155253 268f45cc-cd09-0410-ab3c-d52691b4dbfc
    eb42f534
user-script-top-frame-only-expected.txt 227 Bytes