FragmentPaintPropertyTreeBuilder::UpdateScrollAndScrollTranslation()
Blink28618 Loka 2025

FragmentPaintPropertyTreeBuilder::UpdateScrollAndScrollTranslation()

The provided sources offer an extensive, line-by-line analysis of Blink’s rendering function, FragmentPaintPropertyTreeBuilder::UpdateScrollAndScrollTranslation(), which is critical for implementing scrolling behavior in Chrome. This function manages the creation and updating of two primary data structures: the Scroll Property Node (which defines the logical scroll container, including its viewport, content size, and CSS properties like overscroll behavior and scroll snapping) and the Scroll Translation Transform Node (which applies the negative scroll offset as a geometric translation to descendant content). The process is part of RenderingNG, which uses separate property trees (Transform, Clip, Effect, Scroll) to achieve efficient, incremental updates. The method ensures that only scrollable objects receive these nodes, updates related scrollbar Effect Nodes, and implements optimizations like directly updating the compositor's transform for simple scroll offset changes without rebuilding the entire paint artifact.

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[EXT] Blink Engine LayoutBox Rectangles and Overflow Flags

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The provided text details the internal geometric mechanics and overflow management systems within Chromium’s Blink rendering engine. It specifically examines how the LayoutBox class and its fragments ...

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Blink Engine LayoutBox Rectangles and Overflow Flags

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The LayoutBox Class in Blink’s Layout Engine

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The LayoutBox class is a fundamental C++ component within Chromium’s Blink rendering engine that represents a rectangular CSS box in the layout tree. It serves as the abstract base for most visible we...

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cc: Damage Calculation for Scroller Content Clips

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Chromium’s compositor utilizes property trees to efficiently manage visual elements like clips and transforms during the rendering process. When a user scrolls, the system typically keeps the ClipNode...

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POSIX Shell Scripting and Bash Development on Debian

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