[rename fixit] scrollAnchor -> anchor

packages/flutter/lib/src/rendering/list.dart

@@ -19,6 +19,7 @@ class RenderList extends RenderVirtualViewport<ListParentData> {
     int virtualChildCount,
     Offset paintOffset: Offset.zero,
     Axis mainAxis: Axis.vertical,
+    ViewportAnchor anchor: ViewportAnchor.start,
     Painter overlayPainter,
     LayoutCallback callback
   }) : _itemExtent = itemExtent,
@@ -27,6 +28,7 @@ class RenderList extends RenderVirtualViewport<ListParentData> {
          virtualChildCount: virtualChildCount,
          paintOffset: paintOffset,
          mainAxis: mainAxis,
+         anchor: anchor,
          overlayPainter: overlayPainter,
          callback: callback
        ) {

packages/flutter/lib/src/rendering/viewport.dart

@@ -85,11 +85,11 @@ class RenderViewportBase extends RenderBox implements HasMainAxis {
   RenderViewportBase(
     Offset paintOffset,
     Axis mainAxis,
-    ViewportAnchor scrollAnchor,
+    ViewportAnchor anchor,
     Painter overlayPainter
   ) : _paintOffset = paintOffset,
       _mainAxis = mainAxis,
-      _scrollAnchor = scrollAnchor,
+      _anchor = anchor,
       _overlayPainter = overlayPainter {
     assert(paintOffset != null);
     assert(mainAxis != null);
@@ -139,13 +139,13 @@ class RenderViewportBase extends RenderBox implements HasMainAxis {
   /// The end of the viewport from which the paint offset is computed.
   ///
   /// See [ViewportAnchor] for more detail.
-  ViewportAnchor get scrollAnchor => _scrollAnchor;
-  ViewportAnchor _scrollAnchor;
-  void set scrollAnchor(ViewportAnchor value) {
+  ViewportAnchor get anchor => _anchor;
+  ViewportAnchor _anchor;
+  void set anchor(ViewportAnchor value) {
     assert(value != null);
-    if (value == _scrollAnchor)
+    if (value == _anchor)
       return;
-    _scrollAnchor = value;
+    _anchor = value;
     markNeedsPaint();
     markNeedsSemanticsUpdate();
   }
@@ -186,7 +186,7 @@ class RenderViewportBase extends RenderBox implements HasMainAxis {
     int dyInDevicePixels = (_paintOffset.dy * devicePixelRatio).round();
     return _dimensions.getAbsolutePaintOffset(
       paintOffset: new Offset(dxInDevicePixels / devicePixelRatio, dyInDevicePixels / devicePixelRatio),
-      anchor: _scrollAnchor
+      anchor: _anchor
     );
   }
 
@@ -199,7 +199,7 @@ class RenderViewportBase extends RenderBox implements HasMainAxis {
     super.debugFillDescription(description);
     description.add('paintOffset: $paintOffset');
     description.add('mainAxis: $mainAxis');
-    description.add('scrollAnchor: $scrollAnchor');
+    description.add('anchor: $anchor');
     if (overlayPainter != null)
       description.add('overlay painter: $overlayPainter');
   }
@@ -219,10 +219,10 @@ class RenderViewport extends RenderViewportBase with RenderObjectWithChildMixin<
     RenderBox child,
     Offset paintOffset: Offset.zero,
     Axis mainAxis: Axis.vertical,
-    ViewportAnchor scrollAnchor: ViewportAnchor.start,
+    ViewportAnchor anchor: ViewportAnchor.start,
     Painter overlayPainter,
     this.onPaintOffsetUpdateNeeded
-  }) : super(paintOffset, mainAxis, scrollAnchor, overlayPainter) {
+  }) : super(paintOffset, mainAxis, anchor, overlayPainter) {
     this.child = child;
   }
 
@@ -339,11 +339,11 @@ abstract class RenderVirtualViewport<T extends ContainerBoxParentDataMixin<Rende
     LayoutCallback callback,
     Offset paintOffset: Offset.zero,
     Axis mainAxis: Axis.vertical,
-    ViewportAnchor scrollAnchor: ViewportAnchor.start,
+    ViewportAnchor anchor: ViewportAnchor.start,
     Painter overlayPainter
   }) : _virtualChildCount = virtualChildCount,
        _callback = callback,
-       super(paintOffset, mainAxis, scrollAnchor, overlayPainter);
+       super(paintOffset, mainAxis, anchor, overlayPainter);
 
   int get virtualChildCount => _virtualChildCount;
   int _virtualChildCount;

packages/flutter/lib/src/widgets/basic.dart

@@ -833,7 +833,7 @@ class Viewport extends OneChildRenderObjectWidget {
     Key key,
     this.paintOffset: Offset.zero,
     this.mainAxis: Axis.vertical,
-    this.scrollAnchor: ViewportAnchor.start,
+    this.anchor: ViewportAnchor.start,
     this.overlayPainter,
     this.onPaintOffsetUpdateNeeded,
     Widget child
@@ -854,7 +854,7 @@ class Viewport extends OneChildRenderObjectWidget {
   /// that direction (e.g., the child can be as tall as it wants).
   final Axis mainAxis;
 
-  final ViewportAnchor scrollAnchor;
+  final ViewportAnchor anchor;
 
   /// Paints an overlay over the viewport.
   ///
@@ -867,7 +867,7 @@ class Viewport extends OneChildRenderObjectWidget {
     return new RenderViewport(
       paintOffset: paintOffset,
       mainAxis: mainAxis,
-      scrollAnchor: scrollAnchor,
+      anchor: anchor,
       onPaintOffsetUpdateNeeded: onPaintOffsetUpdateNeeded,
       overlayPainter: overlayPainter
     );
@@ -877,7 +877,7 @@ class Viewport extends OneChildRenderObjectWidget {
     // Order dependency: RenderViewport validates scrollOffset based on mainAxis.
     renderObject
       ..mainAxis = mainAxis
-      ..scrollAnchor = scrollAnchor
+      ..anchor = anchor
       ..paintOffset = paintOffset
       ..onPaintOffsetUpdateNeeded = onPaintOffsetUpdateNeeded
       ..overlayPainter = overlayPainter;

packages/flutter/lib/src/widgets/pageable_list.dart

@@ -166,7 +166,7 @@ class PageableListState<T extends PageableList> extends ScrollableState<T> {
     return new PageViewport(
       itemsWrap: config.itemsWrap,
       mainAxis: config.scrollDirection,
-      scrollAnchor: config.scrollAnchor,
+      anchor: config.scrollAnchor,
       startOffset: scrollOffset,
       overlayPainter: config.scrollableListPainter,
       children: config.children
@@ -227,7 +227,7 @@ class PageViewport extends VirtualViewportFromIterable {
   PageViewport({
     this.startOffset: 0.0,
     this.mainAxis: Axis.vertical,
-    this.scrollAnchor: ViewportAnchor.start,
+    this.anchor: ViewportAnchor.start,
     this.itemsWrap: false,
     this.overlayPainter,
     this.children
@@ -237,7 +237,7 @@ class PageViewport extends VirtualViewportFromIterable {
 
   final double startOffset;
   final Axis mainAxis;
-  final ViewportAnchor scrollAnchor;
+  final ViewportAnchor anchor;
   final bool itemsWrap;
   final Painter overlayPainter;
   final Iterable<Widget> children;
@@ -326,7 +326,7 @@ class _PageViewportElement extends VirtualViewportElement {
       _materializedChildCount = limitItem - startItem;
       _startOffsetBase = startItem.toDouble();
       _startOffsetLimit = (limitItem - 1).toDouble();
-      if (widget.scrollAnchor == ViewportAnchor.end)
+      if (widget.anchor == ViewportAnchor.end)
         _materializedChildBase = (length - _materializedChildBase - _materializedChildCount) % length;
     }
 

packages/flutter/lib/src/widgets/scrollable.dart

@@ -658,7 +658,7 @@ class _ScrollableViewportState extends ScrollableState<ScrollableViewport> {
     return new Viewport(
       paintOffset: scrollOffsetToPixelDelta(scrollOffset),
       mainAxis: config.scrollDirection,
-      scrollAnchor: config.scrollAnchor,
+      anchor: config.scrollAnchor,
       onPaintOffsetUpdateNeeded: _handlePaintOffsetUpdateNeeded,
       child: config.child
     );

packages/flutter/lib/src/widgets/scrollable_list.dart

@@ -79,7 +79,7 @@ class _ScrollableListState extends ScrollableState<ScrollableList> {
       onExtentsChanged: _handleExtentsChanged,
       scrollOffset: scrollOffset,
       mainAxis: config.scrollDirection,
-      scrollAnchor: config.scrollAnchor,
+      anchor: config.scrollAnchor,
       itemExtent: config.itemExtent,
       itemsWrap: config.itemsWrap,
       padding: config.padding,
@@ -94,7 +94,7 @@ class _VirtualListViewport extends VirtualViewport {
     this.onExtentsChanged,
     this.scrollOffset,
     this.mainAxis,
-    this.scrollAnchor,
+    this.anchor,
     this.itemExtent,
     this.itemsWrap,
     this.padding,
@@ -107,7 +107,7 @@ class _VirtualListViewport extends VirtualViewport {
   final ExtentsChangedCallback onExtentsChanged;
   final double scrollOffset;
   final Axis mainAxis;
-  final ViewportAnchor scrollAnchor;
+  final ViewportAnchor anchor;
   final double itemExtent;
   final bool itemsWrap;
   final EdgeDims padding;
@@ -116,7 +116,7 @@ class _VirtualListViewport extends VirtualViewport {
   double get _leadingPadding {
     switch (mainAxis) {
       case Axis.vertical:
-        switch (scrollAnchor) {
+        switch (anchor) {
           case ViewportAnchor.start:
             return padding.top;
           case ViewportAnchor.end:
@@ -124,7 +124,7 @@ class _VirtualListViewport extends VirtualViewport {
         }
         break;
       case Axis.horizontal:
-        switch (scrollAnchor) {
+        switch (anchor) {
           case ViewportAnchor.start:
             return padding.left;
           case ViewportAnchor.end:
@@ -167,7 +167,7 @@ class _VirtualListViewportElement extends VirtualViewportElement {
   void updateRenderObject(_VirtualListViewport oldWidget) {
     renderObject
       ..mainAxis = widget.mainAxis
-      ..scrollAnchor = widget.scrollAnchor
+      ..anchor = widget.anchor
       ..itemExtent = widget.itemExtent
       ..padding = widget.padding
       ..overlayPainter = widget.overlayPainter;
@@ -217,7 +217,7 @@ class _VirtualListViewportElement extends VirtualViewportElement {
       _startOffsetBase = startItem * itemExtent;
       _startOffsetLimit = limitItem * itemExtent - containerExtent;
 
-      if (widget.scrollAnchor == ViewportAnchor.end)
+      if (widget.anchor == ViewportAnchor.end)
         _materializedChildBase = (length - _materializedChildBase - _materializedChildCount) % length;
     }
 
@@ -247,7 +247,7 @@ class ListViewport extends _VirtualListViewport with VirtualViewportFromIterable
     ExtentsChangedCallback onExtentsChanged,
     double scrollOffset: 0.0,
     Axis mainAxis: Axis.vertical,
-    ViewportAnchor scrollAnchor: ViewportAnchor.start,
+    ViewportAnchor anchor: ViewportAnchor.start,
     double itemExtent,
     bool itemsWrap: false,
     EdgeDims padding,
@@ -257,7 +257,7 @@ class ListViewport extends _VirtualListViewport with VirtualViewportFromIterable
     onExtentsChanged,
     scrollOffset,
     mainAxis,
-    scrollAnchor,
+    anchor,
     itemExtent,
     itemsWrap,
     padding,
@@ -342,7 +342,7 @@ class _ScrollableLazyListState extends ScrollableState<ScrollableLazyList> {
       onExtentsChanged: _handleExtentsChanged,
       scrollOffset: scrollOffset,
       mainAxis: config.scrollDirection,
-      scrollAnchor: config.scrollAnchor,
+      anchor: config.scrollAnchor,
       itemExtent: config.itemExtent,
       itemCount: config.itemCount,
       itemBuilder: config.itemBuilder,
@@ -357,7 +357,7 @@ class LazyListViewport extends _VirtualListViewport with VirtualViewportFromBuil
     ExtentsChangedCallback onExtentsChanged,
     double scrollOffset: 0.0,
     Axis mainAxis: Axis.vertical,
-    ViewportAnchor scrollAnchor: ViewportAnchor.start,
+    ViewportAnchor anchor: ViewportAnchor.start,
     double itemExtent,
     EdgeDims padding,
     Painter overlayPainter,
@@ -367,7 +367,7 @@ class LazyListViewport extends _VirtualListViewport with VirtualViewportFromBuil
     onExtentsChanged,
     scrollOffset,
     mainAxis,
-    scrollAnchor,
+    anchor,
     itemExtent,
     false, // Don't support wrapping yet.
     padding,

packages/flutter/lib/src/widgets/virtual_viewport.dart

@@ -51,7 +51,7 @@ abstract class VirtualViewportElement extends RenderObjectElement {
   /// Returns the pixel offset for a scroll offset, accounting for the scroll
   /// anchor.
   double scrollOffsetToPixelOffset(double scrollOffset) {
-    switch (renderObject.scrollAnchor) {
+    switch (renderObject.anchor) {
       case ViewportAnchor.start:
         return -scrollOffset;
       case ViewportAnchor.end: