The new ruler drew tab stops as L-shaped brackets, which differed from the triangles earlier versions showed, and placed marker images at fractional positions, so identical markers drew differently along the ruler.
* CPTextView/CPRulerMarker.j: Round marker image positions to whole points.
* CPTextView/CPTextView.j: Draw tab stops as triangles pointing right for a left tab, left for a right tab and down for a centre or decimal tab, with whole-point image origins.
* Tests/Manual/TextEditor/WORKLIST.md: Remove the ruler and text layout entries fixed in this series, move the remaining nib2cib ruler entry to the nib2cib section, and record the ruler and text width as tested.
Ruler classes departed from canonical NS versions, resulting in functional and visual gaps.:
markers were views that drew text characters and ignored their location argument, the ruler rebuilt its subviews on every update and had no origin offset, measurement units or reserved thicknesses, and CPTextView updated the ruler only on focus and typing attribute changes, had no ruler control methods, and never showed a right indent marker.
* AppKit.j: Import CPRulerMarker and CPRulerView.
* CPScrollView.j: Tile rulers by their required thickness, and give a ruler its scroll view when it is set.
* CPTextView/CPRulerMarker.j: Add CPRulerMarker as an object drawn by its ruler, with a marker location, an image and image origin, movability and removability, and tracking that adds, moves and removes markers through the client view.
* CPTextView/CPRulerView.j: Rewrite CPRulerView with an origin offset, registered measurement units defaulting to the user's region, reserved thicknesses for markers and an accessory view, Cocoa's client view methods, temporary ruler lines, and drawing in a single pass.
* CPTextView/CPTextView.j: Add usesRuler, isRulerVisible, setRulerVisible: and toggleRuler: with a Show Ruler or Hide Ruler title; update the ruler on every selection change; place tab stop, first line, head and tail indent markers relative to the start of the text, with SVG marker images and a context menu for changing tab types and resetting indents.
* Tests/Manual/TextEditor/DocumentWindowController.j: Show the ruler through setRulerVisible:.
David Richardson