The Trunk: ST80-nice.160.mcz

Nicolas Cellier uploaded a new version of ST80 to project The Trunk:
http://source.squeak.org/trunk/ST80-nice.160.mcz

==================== Summary ====================

Name: ST80-nice.160
Author: nice
Time: 11 October 2013, 11:22:37.521 pm
UUID: cbfebbce-1979-4817-b572-3486db0ebdae
Ancestors: ST80-nice.159

Populate BitBltDisplayScanner with MVC compatibility methods.

=============== Diff against ST80-nice.159 ===============

Item was added:
+ ----- Method: BitBltDisplayScanner>>displayLines:in:clippedBy: (in category '*ST80-Support') -----
+ displayLines: linesInterval in: aParagraph clippedBy: visibleRectangle
+ "The central display routine. The call on the primitive
+ (scanCharactersFrom:to:in:rightX:) will be interrupted according to an
+ array of stop conditions passed to the scanner at which time the code to
+ handle the stop condition is run and the call on the primitive continued
+ until a stop condition returns true (which means the line has
+ terminated)."
+ | leftInRun |
+ "leftInRun is the # of characters left to scan in the current run;
+ when 0, it is time to call 'self setStopConditions'"
+ morphicOffset := 0@0.
+ leftInRun := 0.
+ self initializeFromParagraph: aParagraph clippedBy: visibleRectangle.
+ ignoreColorChanges := false.
+ foregroundColor := paragraphColor := aParagraph foregroundColor.
+ backgroundColor := aParagraph backgroundColor.
+ aParagraph backgroundColor isTransparent
+ ifTrue: [fillBlt := nil]
+ ifFalse: [fillBlt := bitBlt copy.  "Blt to fill spaces, tabs, margins"
+ fillBlt sourceForm: nil; sourceOrigin: 0@0.
+ fillBlt fillColor: aParagraph backgroundColor].
+ rightMargin := aParagraph rightMarginForDisplay.
+ lineY := aParagraph topAtLineIndex: linesInterval first.
+ bitBlt destForm deferUpdatesIn: visibleRectangle while: [
+ linesInterval do:
+ [:lineIndex |
+ | string startIndex lastPos runLength stopCondition baselineY lineHeight stop |
+ line := aParagraph lines at: lineIndex.
+ lastDisplayableIndex := lastIndex := line first.
+ leftInRun <= 0
+ ifTrue: [self setStopConditions.  "also sets the font, alignment and emphasisCode"
+ leftInRun := text runLengthFor: line first].
+ leftMargin := aParagraph leftMarginForDisplayForLine: lineIndex alignment: alignment.
+ destX := leftMargin.
+ lineHeight := line lineHeight.
+ fillBlt == nil ifFalse:
+ [fillBlt destX: visibleRectangle left destY: lineY
+ width: visibleRectangle width height: lineHeight; copyBits].
+ baselineY := lineY + line baseline.
+ destY := baselineY - font ascent.  "Should have happened in setFont"
+ runLength := leftInRun.
+ runStopIndex := lastIndex + (runLength - 1) min: line last.
+ leftInRun := leftInRun - (runStopIndex - lastIndex + 1).
+ spaceCount := 0.
+ string := text string.
+ self handleIndentation.
+ [
+ startIndex := lastIndex.
+ lastPos := destX@destY.
+ "Reset the stopping conditions of this displaying loop, and also the font."
+ stopConditionsMustBeReset
+ ifTrue:[self setStopConditions].
+ stopCondition := self scanCharactersFrom: lastIndex to: runStopIndex
+ in: string rightX: rightMargin stopConditions: stopConditions
+ kern: kern.
+ stop := self perform: stopCondition.
+ lastDisplayableIndex >= startIndex ifTrue:[
+ font displayString: string on: bitBlt
+ from: startIndex to: lastDisplayableIndex at: lastPos kern: kern].
+ stop
+ ] whileFalse.
+ fillBlt == nil ifFalse:
+ [fillBlt destX: destX destY: lineY width: visibleRectangle right-destX height: lineHeight; copyBits].
+ lineY := lineY + lineHeight]]!

Item was added:
+ ----- Method: BitBltDisplayScanner>>initializeFromParagraph:clippedBy: (in category '*ST80-Support') -----
+ initializeFromParagraph: aParagraph clippedBy: clippingRectangle
+
+ super initializeFromParagraph: aParagraph clippedBy: clippingRectangle.
+ bitBlt := BitBlt asGrafPort toForm: aParagraph destinationForm.
+ bitBlt sourceX: 0; width: 0. "Init BitBlt so that the first call to a primitive will not fail"
+ bitBlt combinationRule:
+ ((Display depth = 1)
+ ifTrue:
+ [aParagraph rule]
+ ifFalse:
+ [Form paint]).
+ bitBlt colorMap:
+ (Bitmap with: 0      "Assumes 1-bit deep fonts"
+ with: (bitBlt destForm pixelValueFor: aParagraph foregroundColor)).
+ bitBlt clipRect: clippingRectangle!