Changeset 201379 in webkit for trunk/Source/WebCore/rendering/RenderGrid.cpp

Timestamp:

May 25, 2016, 4:32:30 AM (10 years ago)

Author:

svillar@igalia.com

Message:

[css-grid] Refactor populateGridPositions()
​https://bugs.webkit.org/show_bug.cgi?id=158065

Reviewed by Carlos Garcia Campos.

RenderGrid::populateGridPositions() was doing exactly the same thing for columns and rows
but using different data structures. That lead to a lot of duplicated code. It's easy to
refactor it in a new function that properly select the data structures to operate on based
on the direction.

No new tests as there is no change in behaviour.

• rendering/RenderGrid.cpp:

(WebCore::RenderGrid::layoutGridItems):
(WebCore::RenderGrid::populateGridPositionsForDirection): Refactored from
populateGridPositions().
(WebCore::RenderGrid::populateGridPositions): Deleted.

• rendering/RenderGrid.h:

File:

• trunk/Source/WebCore/rendering/RenderGrid.cpp (modified) (3 diffs)

trunk/Source/WebCore/rendering/RenderGrid.cpp

@@ -1550 +1550 @@
 void RenderGrid::layoutGridItems(GridSizingData& sizingData)
 {
-    populateGridPositions(sizingData);
+    populateGridPositionsForDirection(sizingData, ForColumns);
+    populateGridPositionsForDirection(sizingData, ForRows);
 
     for (RenderBox* child = firstChildBox(); child; child = child->nextSiblingBox()) {
@@ -1752 +1753 @@
 }
 
-void RenderGrid::populateGridPositions(GridSizingData& sizingData)
+void RenderGrid::populateGridPositionsForDirection(GridSizingData& sizingData, GridTrackSizingDirection direction)
 {
     // Since we add alignment offsets and track gutters, grid lines are not always adjacent. Hence we will have to
@@ -1761 +1762 @@
     // inline-axis flow direction. However, column lines positions are 'direction' unaware. This simplification
     // allows us to use the same indexes to identify the columns independently on the inline-axis direction.
-    unsigned numberOfTracks = sizingData.columnTracks.size();
+    bool isRowAxis = direction == ForColumns;
+    auto& tracks = isRowAxis ? sizingData.columnTracks : sizingData.rowTracks;
+    unsigned numberOfTracks = tracks.size();
     unsigned numberOfLines = numberOfTracks + 1;
     unsigned lastLine = numberOfLines - 1;
     unsigned nextToLastLine = numberOfLines - 2;
-    ContentAlignmentData offset = computeContentPositionAndDistributionOffset(ForColumns, sizingData.freeSpaceForDirection(ForColumns).value(), numberOfTracks);
-    LayoutUnit trackGap = guttersSize(ForColumns, 2);
-    m_columnPositions.resize(numberOfLines);
-    m_columnPositions[0] = borderAndPaddingLogicalLeft() + offset.positionOffset;
+    ContentAlignmentData offset = computeContentPositionAndDistributionOffset(direction, sizingData.freeSpaceForDirection(direction).value(), numberOfTracks);
+    LayoutUnit trackGap = guttersSize(direction, 2);
+    auto& positions = isRowAxis ? m_columnPositions : m_rowPositions;
+    positions.resize(numberOfLines);
+    auto borderAndPadding = isRowAxis ? borderAndPaddingLogicalLeft() : borderAndPaddingBefore();
+    positions[0] = borderAndPadding + offset.positionOffset;
     for (unsigned i = 0; i < nextToLastLine; ++i)
-        m_columnPositions[i + 1] = m_columnPositions[i] + offset.distributionOffset + sizingData.columnTracks[i].baseSize() + trackGap;
-    m_columnPositions[lastLine] = m_columnPositions[nextToLastLine] + sizingData.columnTracks[nextToLastLine].baseSize();
-    m_offsetBetweenColumns = offset.distributionOffset;
-
-    numberOfTracks = sizingData.rowTracks.size();
-    numberOfLines = numberOfTracks + 1;
-    lastLine = numberOfLines - 1;
-    nextToLastLine = numberOfLines - 2;
-    offset = computeContentPositionAndDistributionOffset(ForRows, sizingData.freeSpaceForDirection(ForRows).value(), numberOfTracks);
-    trackGap = guttersSize(ForRows, 2);
-    m_rowPositions.resize(numberOfLines);
-    m_rowPositions[0] = borderAndPaddingBefore() + offset.positionOffset;
-    for (unsigned i = 0; i < nextToLastLine; ++i)
-        m_rowPositions[i + 1] = m_rowPositions[i] + offset.distributionOffset + sizingData.rowTracks[i].baseSize() + trackGap;
-    m_rowPositions[lastLine] = m_rowPositions[nextToLastLine] + sizingData.rowTracks[nextToLastLine].baseSize();
-    m_offsetBetweenRows = offset.distributionOffset;
+        positions[i + 1] = positions[i] + offset.distributionOffset + tracks[i].baseSize() + trackGap;
+    positions[lastLine] = positions[nextToLastLine] + tracks[nextToLastLine].baseSize();
+    auto& offsetBetweenTracks = isRowAxis ? m_offsetBetweenColumns : m_offsetBetweenRows;
+    offsetBetweenTracks = offset.distributionOffset;
 }