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Issue 2860893004: Fix layout team link (Closed)
Patch Set: Created 3 years, 7 months ago
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1 # Blink Layout 1 # Blink Layout
2 2
3 The `Source/core/layout` directory contains the implementation of layout objects . 3 The `Source/core/layout` directory contains the implementation of layout objects .
4 It covers the following document lifecycle states: 4 It covers the following document lifecycle states:
5 5
6 * LayoutSubtreeChange (`InLayoutSubtreeChange` and `LayoutSubtreeChangeClean`) 6 * LayoutSubtreeChange (`InLayoutSubtreeChange` and `LayoutSubtreeChangeClean`)
7 * PreLayout (`InPreLayout`) 7 * PreLayout (`InPreLayout`)
8 * PerformLayout (`InPerformLayout`) 8 * PerformLayout (`InPerformLayout`)
9 * AfterPerformLayout (`AfterPerformLayout` and `LayoutClean`) 9 * AfterPerformLayout (`AfterPerformLayout` and `LayoutClean`)
10 10
11 Note that a new Blink layout system is under development. See the 11 Note that a new Blink layout system is under development. See the
12 [LayoutNG design document](https://docs.google.com/document/d/1uxbDh4uONFQOiGuiu mlJBLGgO4KDWB8ZEkp7Rd47fw4/preview). 12 [LayoutNG design document](https://docs.google.com/document/d/1uxbDh4uONFQOiGuiu mlJBLGgO4KDWB8ZEkp7Rd47fw4/preview).
13 13
14 The layout code is maintained by the 14 The layout code is maintained by the
15 [layout team](http://dev.chromium.org/blink/layout-team). 15 [layout team](http://dev.chromium.org/teams/layout-team).
16 16
17 ## Scroll origin vs. offset vs. position 17 ## Scroll origin vs. offset vs. position
18 18
19 When a LayoutBox has scrollable overflow, it is associated with a PaintLayerScro llableArea. 19 When a LayoutBox has scrollable overflow, it is associated with a PaintLayerScro llableArea.
20 PaintLayerScrollableArea uses a "scroll origin" to represent the location of the top/left 20 PaintLayerScrollableArea uses a "scroll origin" to represent the location of the top/left
21 corner of the content rect (the visible part of the content) in the coordinate s ystem 21 corner of the content rect (the visible part of the content) in the coordinate s ystem
22 defined by the top/left corner of the overflow rect, when the box is scrolled al l the way 22 defined by the top/left corner of the overflow rect, when the box is scrolled al l the way
23 to the beginning of its content. 23 to the beginning of its content.
24 24
25 For content which flows left-to-right and top-to-bottom, the scroll origin will be (0, 0), 25 For content which flows left-to-right and top-to-bottom, the scroll origin will be (0, 0),
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316 left-to-right or right-to-left block flow. Geometry is transposed for vertical 316 left-to-right or right-to-left block flow. Geometry is transposed for vertical
317 writing mode. See calls to `transposed{Rect,Point,Size}()`. 317 writing mode. See calls to `transposed{Rect,Point,Size}()`.
318 * `direction`/`dir`: "inline base direction" of a box. One of `ltr` or 318 * `direction`/`dir`: "inline base direction" of a box. One of `ltr` or
319 `rtl`. See calls to `isLeftToRightDirection()`. 319 `rtl`. See calls to `isLeftToRightDirection()`.
320 * `text-orientation`: orientation of text in a line. Only relevant for vertical 320 * `text-orientation`: orientation of text in a line. Only relevant for vertical
321 modes. 321 modes.
322 * orthogonal flow: when a box has a writing mode perpendicular to its containing 322 * orthogonal flow: when a box has a writing mode perpendicular to its containing
323 block. This can lead to complex cases. See 323 block. This can lead to complex cases. See
324 [specification](https://www.w3.org/TR/css-writing-modes-3/#orthogonal-flows) 324 [specification](https://www.w3.org/TR/css-writing-modes-3/#orthogonal-flows)
325 for more. 325 for more.
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