"
COPYRIGHT (c) 1989 by Claus Gittinger
All Rights Reserved
This software is furnished under a license and may be used
only in accordance with the terms of that license and with the
inclusion of the above copyright notice. This software may not
be provided or otherwise made available to, or used by, any
other person. No title to or ownership of the software is
hereby transferred.
"
View subclass:#ListView
instanceVariableNames:'list
attributes
firstLineShown leftOffset
nFullLinesShown nLinesShown
fgColor bgColor
partialLines
leftMargin topMargin
textStartLeft textStartTop innerWidth
tabPositions lineSpacing
fontHeight fontAscent
fontIsFixedWidth fontWidth
normalFont boldFont italicFont
autoScrollBlock autoScrollDeltaT
searchPattern wordCheck
includesNonStrings widthOfWidestLine'
classVariableNames:'DefaultForegroundColor DefaultBackgroundColor
DefaultFont'
poolDictionaries:''
category:'Views-Text'
!
ListView comment:'
COPYRIGHT (c) 1989 by Claus Gittinger
All Rights Reserved
$Header: /cvs/stx/stx/libwidg/ListView.st,v 1.15 1995-02-06 00:52:34 claus Exp $
'!
!ListView class methodsFor:'documentation'!
copyright
"
COPYRIGHT (c) 1989 by Claus Gittinger
All Rights Reserved
This software is furnished under a license and may be used
only in accordance with the terms of that license and with the
inclusion of the above copyright notice. This software may not
be provided or otherwise made available to, or used by, any
other person. No title to or ownership of the software is
hereby transferred.
"
!
version
"
$Header: /cvs/stx/stx/libwidg/ListView.st,v 1.15 1995-02-06 00:52:34 claus Exp $
"
!
documentation
"
a View for (string-)lists.
This class can only passively display collections of strings-
selections, editing, cursors etc. must be done in subclasses.
see SelectionInListView, TextView etc.
This code currently handles only fixed-height fonts correctly -
should be rewritten in some places ...
It can only scroll by full lines vertically (i.e. setting firstLineShown to ~~ 1)
which should be changed to have this behavior optionally for smooth scroll.
This is being totally rewritten ... so dont depend on the internals.
Instance variables:
list <aCollection> the text strings
attributes <aCollection> corresponding attributes (if any)
firstLineShown <Number> the index of the 1st visible line (1 ..)
leftOffset <Number> left offset for horizontal scroll
nFullLinesShown <Number> the number of unclipped lines in visible
nLinesShown <Number> the number of lines in visible
fgColor <Color> color to draw characters
bgColor <Color> the background
partialLines <Boolean> allow last line to be partial displayed
leftMargin <Number> margin at left in pixels
topMargin <Number> margin at top in pixels
textStartLeft <Number> margin + leftMargin
textStartTop <Number> margin + topMargin
innerWidth <Number> width - margins
tabPositions <aCollection> tab stops (cols)
fontHeight <Number> font height in pixels
fontAscent <Number> font ascent in pixels
fontIsFixed <Boolean> true if its a fixed font
fontWidth <Number> width of space
lineSpacing <Number> pixels between lines
normalFont <Font> font for normal characters
boldFont <Font> font for bold characters
italicFont <Font> font for italic characters
searchPattern <String> last pattern for searching
wordCheck <Block> rule used for check in word select
StyleSheet parameters:
textForegroundColor defaults to Black
textBackgroundColor defaults to White
textFont defaults to defaultFont
"
! !
!ListView class methodsFor:'defaults'!
updateStyleCache
DefaultForegroundColor := StyleSheet colorAt:'textForegroundColor' default:Black.
DefaultBackgroundColor := StyleSheet colorAt:'textBackgroundColor' default:White.
DefaultFont := StyleSheet fontAt:'textFont'.
!
tab4Positions
^ #(1 5 9 13 17 21 25 29 33 37 41 45 49 53 57 61 65 69 73 77 81
85 89 93 97 101 105 109 113 114 121 125 129 133 137 141 145)
!
tab8Positions
^ #(1 9 17 25 33 41 49 57 65 73 81 89 97 105 113 121 129 137 145)
!
defaultTabPositions
^ self tab8Positions
! !
!ListView methodsFor:'initialization'!
initialize
device width <= 800 ifTrue:[
"
some more pixels of real estate ...
"
leftMargin := topMargin := 1
] ifFalse:[
leftMargin := (self horizontalPixelPerMillimeter:0.5) rounded.
topMargin := (self verticalPixelPerMillimeter:0.5) rounded.
].
super initialize.
bitGravity := #NorthWest.
list := nil.
firstLineShown := 1.
nFullLinesShown := 1. "just any value ..."
nLinesShown := 1. "just any value"
leftOffset := 0.
partialLines := true.
tabPositions := self class defaultTabPositions.
textStartLeft := leftMargin + margin.
textStartTop := topMargin + margin.
innerWidth := width - textStartLeft - (margin * 2).
self getFontParameters.
wordCheck := [:char | char isNationalAlphaNumeric].
includesNonStrings := false
!
initStyle
super initStyle.
lineSpacing := 0.
fgColor := DefaultForegroundColor on:device.
bgColor := DefaultBackgroundColor on:device.
DefaultFont notNil ifTrue:[font := DefaultFont on:device]
!
create
super create.
"I cache font parameters here - they are used so often ..."
self getFontParameters.
self computeNumberOfLinesShown.
fgColor := fgColor on:device.
bgColor := bgColor on:device
!
recreate
"recreate after a snapin"
super recreate.
"recompute margins and font parameters
- display may have different resolution."
leftMargin := (self horizontalPixelPerMillimeter:0.5) rounded.
topMargin := (self verticalPixelPerMillimeter:0.5) rounded.
textStartLeft := leftMargin + margin.
textStartTop := topMargin + margin.
innerWidth := width - textStartLeft - margin.
self getFontParameters
!
realize
extentChanged ifTrue:[
self computeNumberOfLinesShown.
].
firstLineShown ~~ 1 ifTrue:[
firstLineShown + nLinesShown > list size ifTrue:[
self scrollToLine:list size - nLinesShown.
]
].
super realize
! !
!ListView methodsFor:'accessing'!
backgroundColor
"return the background color"
^ bgColor
!
backgroundColor:aColor
"set the background color"
bgColor ~~ aColor ifTrue:[
bgColor := aColor.
self viewBackground:bgColor.
shown ifTrue:[
self clear.
self redraw
]
]
!
foregroundColor
"return the foreground color"
^ fgColor
!
foregroundColor:aColor
"set the foreground color"
fgColor ~~ aColor ifTrue:[
fgColor := aColor.
shown ifTrue:[
self redraw
]
]
!
foregroundColor:color1 backgroundColor:color2
"set both foreground and background colors"
((fgColor ~~ color1) or:[bgColor ~~ color2]) ifTrue:[
fgColor := color1.
bgColor := color2.
shown ifTrue:[
self redraw
]
]
!
partialLines:aBoolean
"allow/disallow display of a last partial line"
partialLines := aBoolean.
self computeNumberOfLinesShown
!
leftMargin:aNumber
"set the margin to left of 1st col"
leftMargin := aNumber.
textStartLeft := leftMargin + margin.
innerWidth := width - textStartLeft - margin
!
leftMargin
"return the margin to left of 1st col"
^ leftMargin
!
setList:aCollection expandTabs:expandTabs
"set the contents (a collection of strings);
dont change position (i.e. do not scroll).
This can be used to update a self-changing list
(for example: a file list being shown, without disturbing user too much)"
|oldFirst|
(aCollection isNil and:[list isNil]) ifTrue:[
"no change"
^ self
].
list := aCollection.
list notNil ifTrue:[
expandTabs ifTrue:[
self expandTabs
] ifFalse:[
includesNonStrings := (list findFirst:[:l | l notNil and:[l isString not]]) ~~ 0.
]
].
self contentsChanged.
"/ new - reposition if too big
(firstLineShown + nFullLinesShown) > list size ifTrue:[
oldFirst := firstLineShown.
firstLineShown := list size - nFullLinesShown + 1.
firstLineShown < 1 ifTrue:[firstLineShown := 1].
self originChanged:(oldFirst - 1) negated.
shown ifTrue:[
self clear.
]
].
"/ end new
shown ifTrue:[
self redrawFromVisibleLine:1 to:nLinesShown
]
!
setList:aCollection
"set the contents (a collection of strings);
dont change position (i.e. do not scroll).
This can be used to update a self-changing list
(for example: a file list being shown, without disturbing user too much)"
^ self setList:aCollection expandTabs:true
!
list:aCollection
"set the contents (a collection of strings) and scroll to top-left"
|oldFirst oldLeft|
(aCollection isNil and:[list isNil]) ifTrue:[
"no change"
self scrollToTop.
self scrollToLeft.
^ self
].
list := aCollection.
list notNil ifTrue:[
self expandTabs
].
oldFirst := firstLineShown.
oldLeft := leftOffset.
firstLineShown := 1.
leftOffset := 0.
realized ifTrue:[
self contentsChanged.
"
dont use scroll here to avoid the redraw
"
oldFirst ~~ firstLineShown ifTrue:[
self originChanged:(oldFirst - 1) negated.
].
shown ifTrue:[
self redrawFromVisibleLine:1 to:nLinesShown
]
]
!
list
"return the contents as a collection of strings"
^ list
!
setContents:something
"set the contents (either a string or a Collection of strings)
dont change position (i.e. do not scroll).
This can be used to update a self-changing list
(for example: a file list being shown, without disturbing user too much)."
|l|
l := something.
l notNil ifTrue:[
l isString ifTrue:[
l := l asText
]
].
self setList:l
!
contents:something
"set the contents (either a string or a Collection of strings)
also scroll to top-left"
|l|
l := something.
l notNil ifTrue:[
l isString ifTrue:[
l := l asText
]
].
self list:l
!
contents
"return the contents as a string"
list isNil ifTrue:[^ ''].
^ list asString
!
at:index put:aString
"change a line and redisplay"
self checkForExistingLine:index.
list at:index put:aString.
includesNonStrings ifFalse:[
includesNonStrings := (aString notNil and:[aString isString not]).
] ifTrue:[
(aString isNil or:[aString isString]) ifTrue:[
includesNonStrings := (list findFirst:[:l | l notNil and:[l isString not]]) ~~ 0.
]
].
shown ifTrue:[
self redrawLine:index
]
!
at:index
"retrieve a line; return nil if behond end-of-text"
^ self listAt:index
!
removeIndexWithoutRedraw:lineNr
"delete a line, given its lineNr - no redraw;
return true, if something was really deleted (so sender knows,
if a redraw is needed)"
(list isNil or:[lineNr > list size]) ifTrue:[^ false].
list removeIndex:lineNr.
lineNr < firstLineShown ifTrue:[
firstLineShown := firstLineShown - 1
].
self contentsChanged.
^ true
!
removeIndex:lineNr
"delete line, update view"
|visLine w
srcY "{ Class: SmallInteger }" |
(self removeIndexWithoutRedraw:lineNr) ifFalse:[^ self].
"
is there a need to redraw ?
"
shown ifFalse:[^ self].
visLine := self listLineToVisibleLine:lineNr.
visLine notNil ifTrue:[
w := self widthForScrollBetween:lineNr and:(firstLineShown + nLinesShown).
srcY := topMargin + (visLine * fontHeight).
self catchExpose.
self copyFrom:self x:textStartLeft y:srcY
toX:textStartLeft y:(srcY - fontHeight)
width:w height:((nLinesShown - visLine) * fontHeight).
self redrawVisibleLine:nFullLinesShown.
"
redraw last partial line - if any
"
(nFullLinesShown ~~ nLinesShown) ifTrue:[
self redrawVisibleLine:nLinesShown
].
self waitForExpose
]
!
font:aFont
"set the font for all shown text.
Redraws everything."
aFont isNil ifTrue:[
^ self error:'nil font'
].
font ~~ aFont ifTrue:[
super font:aFont.
realized ifTrue:[
(font device == device) ifTrue:[
self getFontParameters.
self computeNumberOfLinesShown.
shown ifTrue:[
self redrawFromVisibleLine:1 to:nLinesShown
]
].
self contentsChanged
]
]
!
level:aNumber
"set the level - cought here to update text-position variables
(which avoids many computations later)"
super level:aNumber.
textStartLeft := leftMargin + margin.
textStartTop := topMargin + margin.
" textStartLeft := leftMargin. "
innerWidth := width - textStartLeft - margin
!
innerHeight
"return the number of pixels visible of the contents
- redefined since ListView adds a margin"
^ height - (2 * margin) - (2 * topMargin)
! !
!ListView methodsFor:'queries'!
firstLineShown
"return the index of the first (possibly partial) visible line"
^ firstLineShown
!
lastLineShown
"return the index of the last (possibly partial) visible line"
^ firstLineShown + nLinesShown
!
numberOfLines
"return the number of lines the text has"
^ list size
!
lengthOfLongestLine
"return the length (in characters) of the longest line"
^ self lengthOfLongestLineBetween:1 and:list size
!
lengthOfLongestLineBetween:firstLine and:lastLine
"return the length (in characters) of the longest line in a line-range"
|max "{ Class: SmallInteger }"
thisLen "{ Class: SmallInteger }"
listSize "{ Class: SmallInteger }"
first "{ Class: SmallInteger }"
last "{ Class: SmallInteger }" |
list isNil ifTrue:[^ 0].
listSize := list size.
max := 0.
first := firstLine.
last := lastLine.
(first > listSize) ifTrue:[^ max].
(last > listSize) ifTrue:[
last := listSize
].
list from:first to:last do:[:lineString |
lineString notNil ifTrue:[
thisLen := lineString size.
(thisLen > max) ifTrue:[
max := thisLen
]
]
].
^ max
!
heightOfContents
"return the height of the contents in pixels
- used for scrollbar interface"
| numLines |
numLines := self numberOfLines.
numLines == 0 ifTrue:[^ 0].
"
need device-font for query
"
font := font on:device.
^ numLines * fontHeight + textStartTop
+ (font descent) "makes it look better".
"/ + (font descent * 2) "makes it look better".
"/ "it used to be that code - which is wrong"
"/ (nLinesShown == nFullLinesShown) ifTrue:[
"/ ^ numLines * fontHeight
"/ ].
"/ "add one - otherwise we cannot make last line
"/ fully visible since scrolling is done by full lines only"
"/
"/ ^ (numLines + 1) * fontHeight
!
widthOfContents
"return the width of the contents in pixels
- used for scrollbar interface"
|max|
list isNil ifTrue:[^ 0].
includesNonStrings ifTrue:[
max := list
inject:0
into:[:maxSoFar :entry |
(
entry isNil ifTrue:[
0
] ifFalse:[
entry isString ifTrue:[
font widthOf:entry
] ifFalse:[
entry widthIn:self
]
]
) max:maxSoFar.
]
] ifFalse:[
fontIsFixedWidth ifTrue:[
max := self lengthOfLongestLine * fontWidth
] ifFalse:[
max := 0.
list notNil ifTrue:[
max := max max:(font widthOf:list)
].
].
^ max + (leftMargin * 2)
]
!
yOriginOfContents
"return the vertical origin of the contents in pixels
- used for scrollbar interface"
^ (firstLineShown - 1) * fontHeight
!
xOriginOfContents
"return the horizontal origin of the contents in pixels
- used for scrollbar interface"
^ leftOffset
!
leftIndentOfLine:lineNr
"return the number of spaces at the left in line, lineNr.
returns 0 for empty lines."
|lineString index end|
lineString := self listAt:lineNr.
lineString notNil ifTrue:[
index := 1.
end := lineString size.
[index <= end] whileTrue:[
(lineString at:index) isSeparator ifFalse:[^ index - 1].
index := index + 1
]
].
^ 0
! !
!ListView methodsFor:'private'!
getFontParameters
"get some info of the used font. They are cached since we use them often .."
font := font on:device.
normalFont := font.
fontHeight := font height + lineSpacing.
fontAscent := font ascent.
fontWidth := font width.
fontIsFixedWidth := font isFixedWidth.
!
checkForExistingLine:lineNr
"check if a line for lineNr exists; if not, expand text"
list isNil ifTrue: [
list := Text new:lineNr.
self contentsChanged
] ifFalse: [
lineNr > (list size) ifTrue:[
list grow:lineNr.
self contentsChanged
]
]
!
getBoldFont
"get a bold-font corresponding to font"
font style notNil ifTrue:[
boldFont := Font family:(font family) face:'bold'
style:'roman' size:(font size)
].
boldFont isNil ifTrue:[
boldFont := font
]
!
getItalicFont
"get an italic-font corresponding to font"
font style notNil ifTrue:[
italicFont := Font family:(font family) face:'medium'
style:'oblique' size:(font size)
].
italicFont isNil ifTrue:[
italicFont := font
]
!
convertRTF:aList
"this is a q&d RTF to poor-text converter which removes any rich stuff.
- a first shot 'til DocumentView is finished ..."
|newList newLine charIndex inEscape char special|
newList := Text new:200.
newList grow:0.
newLine := ''.
aList do:[:line |
((line size == 0) or:[line isBlank]) ifTrue:[
newList add:newLine.
newLine := ''
] ifFalse:[
special := ((line at:1) == ${) or:[(line includes:$\)].
special := special or:[(line at:1) == $}].
special ifFalse:[
newList add:(newLine , line)
] ifTrue:[
charIndex := 1.
[charIndex <= line size] whileTrue:[
char := line at:charIndex.
((char == ${ ) or:[char == $} ]) ifTrue:[
"left-brace: ignore rest of line"
charIndex := line size + 1
] ifFalse:[
(char == $\) ifTrue:[
inEscape := true
] ifFalse:[
inEscape ifTrue:[
(char == Character space) ifTrue:[
inEscape := false
]
] ifFalse:[
newLine := newLine copyWith:char
]
].
charIndex := charIndex + 1
]
]
]
]
].
^ newList
!
computeNumberOfLinesShown
"recompute the number of visible lines"
nFullLinesShown := self innerHeight // fontHeight.
nLinesShown := nFullLinesShown.
partialLines ifTrue:[
((nLinesShown * fontHeight) == height) ifFalse:[
nLinesShown := nLinesShown + 1
]
]
!
widthOfWidestLineBetween:firstLine and:lastLine
"return the width in pixels of the widest line in a range
- used to optimize scrolling, by limiting the scrolled area"
|max "{ Class: SmallInteger }"
first "{ Class: SmallInteger }"
last "{ Class: SmallInteger }"
thisLen "{ Class: SmallInteger }"
listSize "{ Class: SmallInteger }" |
includesNonStrings ifTrue:[
^ width
].
fontIsFixedWidth ifTrue:[
^ (self lengthOfLongestLineBetween:firstLine and:lastLine) * fontWidth
].
listSize := list size.
max := 0.
first := firstLine.
last := lastLine.
(first > listSize) ifTrue:[^ max].
(last > listSize) ifTrue:[
last := listSize
].
list from:first to:last do:[:line |
line notNil ifTrue:[
thisLen := font widthOf:line.
(thisLen > max) ifTrue:[
max := thisLen
]
]
].
^ max
!
widthForScrollBetween:firstLine and:lastLine
"return the width in pixels for a scroll between firstLine and lastLine.
- used to optimize scrolling, by limiting the scrolled area.
Subclasses with selections or other additional visible stuff should redefine
this method."
|w|
"for small width, its not worth searching for
longest line ...
"
(width < 300) ifTrue:[^ innerWidth].
"for large lists, search may take longer than scrolling full
"
list size > 2000 ifTrue:[^ innerWidth].
"
if there is a pattern-background, we have to scroll everything
"
(viewBackground isColor not
or:[viewBackground colorId notNil]) ifTrue:[
^ width
].
w := self widthOfWidestLineBetween:firstLine and:lastLine.
(w > innerWidth) ifTrue:[^ innerWidth].
^ w
!
listAt:lineNr
"given a lineNumber, return the corresponding string"
list isNil ifTrue:[^ nil].
(lineNr between:1 and:list size) ifFalse:[^ nil].
^ list at:lineNr
!
listAt:lineNr from:startCol to:endCol
"return substring from startCol to endCol of a line"
|line stop lineLen|
line := self listAt:lineNr.
line isNil ifTrue:[^ nil].
lineLen := line size.
(startCol > lineLen) ifTrue:[^ nil].
stop := endCol.
(stop > lineLen) ifTrue:[stop := lineLen].
^ line copyFrom:startCol to:stop
!
listAt:lineNr from:startCol
"return right substring from startCol to end of a line"
|line|
line := self listAt:lineNr.
line isNil ifTrue:[^ nil].
(startCol > line size) ifTrue:[^ nil].
^ line copyFrom:startCol
!
listAt:lineNr to:endCol
"return left substring from start to endCol of a line"
|line stop|
line := self listAt:lineNr.
line isNil ifTrue:[^ nil].
stop := endCol.
(stop > line size) ifTrue:[stop := line size].
^ line copyTo:stop
!
listLineToVisibleLine:listLineNr
"given a list line (1..) return visible linenr or nil"
|visibleLineNr "{ Class: SmallInteger }"|
shown ifFalse:[^ nil].
listLineNr isNil ifTrue:[^ nil].
visibleLineNr := listLineNr + 1 - firstLineShown.
(visibleLineNr between:1 and:nLinesShown) ifFalse:[^ nil].
^ visibleLineNr
!
visibleLineToListLine:visibleLineNr
"given a visible line (1..) return linenr in list or nil
(this one returns nil if the given visibleLineNr is one of the
separators)"
|listLineNr "{ Class: SmallInteger }"
listsize "{ Class: SmallInteger }" |
visibleLineNr isNil ifTrue:[^ nil].
listLineNr := visibleLineNr + firstLineShown - 1.
(listLineNr == 0) ifTrue:[^nil].
listsize := list size.
(listLineNr <= listsize) ifTrue:[^ listLineNr].
^ nil
!
absoluteLineToVisibleLine:absLineNr
"given an absolute line (1..) return visible linenr or nil"
absLineNr isNil ifTrue:[^ nil].
(absLineNr < firstLineShown) ifTrue:[^ nil].
(absLineNr >= (firstLineShown + nLinesShown)) ifTrue:[^ nil].
^ absLineNr - firstLineShown + 1
!
visibleLineToAbsoluteLine:visibleLineNr
"given a visible line (1..) return absolut linenr"
visibleLineNr isNil ifTrue:[^ nil].
^ visibleLineNr + firstLineShown - 1
!
yOfVisibleLine:visLineNr
"given a visible lineNr, return y-coordinate in view
- works for fix-height fonts only"
^ ((visLineNr - 1) * fontHeight) + textStartTop
!
xOfCol:col inVisibleLine:visLineNr
"given a visible line- and colNr, return x-coordinate in view"
|line lineSize tcol|
tcol := col - 1.
fontIsFixedWidth ifTrue:[
^ (tcol * fontWidth) + textStartLeft
].
line := self visibleAt:visLineNr.
line notNil ifTrue:[
lineSize := line size
] ifFalse:[
lineSize := 0
].
(lineSize == 0) ifTrue:[
^ (tcol * fontWidth) + textStartLeft
].
(lineSize < col) ifTrue:[
^ (font widthOf:line)
+ (fontWidth * (tcol - lineSize))
+ textStartLeft
].
^ (font widthOf:line from:1 to:tcol) + textStartLeft
!
colOfX:x inVisibleLine:visLineNr
"given a visible lineNr and x-coordinate, return colNr"
|lineString linePixelWidth xRel runCol posLeft posRight done|
xRel := x - textStartLeft + leftOffset.
fontIsFixedWidth ifTrue:[
^ (xRel // fontWidth) + 1
].
lineString := self visibleAt:visLineNr.
lineString notNil ifTrue:[
linePixelWidth := font widthOf:lineString
] ifFalse:[
linePixelWidth := 0
].
(xRel <= 0) ifTrue:[^ 1].
(linePixelWidth <= xRel) ifTrue:[
fontWidth == 0 ifTrue:[
"
although this 'cannot happen',
it seems that X reports this width for some strange fonts ...
"
^ lineString size
].
^ lineString size + ((xRel - linePixelWidth) // fontWidth) + 1
].
runCol := lineString size // 2.
(runCol == 0) ifTrue:[runCol := 1].
posLeft := font widthOf:lineString from:1 to:(runCol - 1).
posRight := font widthOf:lineString from:1 to:runCol.
done := (posLeft <= xRel) and:[posRight > xRel].
[done] whileFalse:[
(posRight <= xRel) ifTrue:[
runCol := runCol + 1.
posLeft := posRight.
posRight := font widthOf:lineString from:1 to:runCol
] ifFalse:[
(posLeft > xRel) ifTrue:[
runCol := runCol - 1.
(runCol == 0) ifTrue:[^ 0].
posRight := posLeft.
posLeft := font widthOf:lineString from:1 to:(runCol - 1)
]
].
done := (posLeft <= xRel) and:[posRight > xRel]
].
^ runCol
!
visibleLineOfY:y
"given a y-coordinate, return lineNr
- works for fix-height fonts only"
^ ((y - textStartTop) // fontHeight) + 1
!
visibleAt:visibleLineNr
"return what is visible at line (numbers start at 1)"
|listLineNr listsize|
listLineNr := visibleLineNr + firstLineShown - 1.
(listLineNr == 0) ifTrue:[^ nil].
(list notNil) ifTrue:[
listsize := list size
] ifFalse:[
listsize := 0
].
(listLineNr <= listsize) ifTrue:[^ list at:listLineNr].
^ ''
!
lineOfCharacterPosition:charPos
"given a character index within the contents-string,
return the lineNumber where the character is
- used to find line to hilight from Compilers error-position"
|lineNr sum lastLine|
lineNr := 1.
sum := 0.
lastLine := list size.
[sum < charPos] whileTrue:[
(lineNr > lastLine) ifTrue:[^ lineNr - 1].
sum := sum + (list at:lineNr) size + 1.
lineNr := lineNr + 1
].
^ lineNr - 1
!
characterPositionOfLine:lineNr col:col
"given a line/col position, return the character index within the contents-string,
- used with Compilers error-positioning"
|lineString pos|
self checkForExistingLine:lineNr.
pos := 1.
1 to:(lineNr - 1) do:[:lnr |
lineString := list at:lnr.
lineString notNil ifTrue:[
pos := pos + lineString size
].
pos := pos + 1 "the return-character"
].
^ pos + col - 1
! !
!ListView methodsFor:'tabulators'!
setTab4
"set 4-character tab stops"
tabPositions := self class tab4Positions.
!
setTab8
"set 8-character tab stops"
tabPositions := self class tab8Positions.
!
expandTabs
"go through whole text expanding tabs into spaces"
|line newLine nLines "{ Class: SmallInteger }"|
list notNil ifTrue:[
nLines := list size.
1 to:nLines do:[:index |
line := list at:index.
line notNil ifTrue:[
line isString ifFalse:[
newLine := line printString
] ifTrue:[
newLine := line
].
(newLine occurrencesOf:(Character tab)) == 0 ifFalse:[
newLine := self withTabsExpanded:newLine
].
(newLine ~~ line) ifTrue:[
list at:index put:newLine
]
]
]
]
!
nextTabAfter:colNr
"return the next tab position after col"
|col "{ Class: SmallInteger }"
tabIndex "{ Class: SmallInteger }"
thisTab "{ Class: SmallInteger }"
nTabs "{ Class: SmallInteger }" |
tabIndex := 1.
col := colNr.
thisTab := tabPositions at:tabIndex.
nTabs := tabPositions size.
[thisTab <= col] whileTrue:[
(tabIndex == nTabs) ifTrue:[^ thisTab].
tabIndex := tabIndex + 1.
thisTab := tabPositions at:tabIndex
].
^ thisTab
!
prevTabBefore:colNr
"return the prev tab position before col"
|col "{ Class: SmallInteger }"
tabIndex "{ Class: SmallInteger }"
thisTab "{ Class: SmallInteger }"
nTabs "{ Class: SmallInteger }" |
tabIndex := 1.
col := colNr.
thisTab := tabPositions at:tabIndex.
nTabs := tabPositions size.
[thisTab < col] whileTrue:[
(tabIndex == nTabs) ifTrue:[^ thisTab].
tabIndex := tabIndex + 1.
thisTab := tabPositions at:tabIndex
].
(tabIndex == 1) ifTrue:[
^ 1
].
^ tabPositions at:(tabIndex - 1)
!
withTabsExpanded:line
"expand tabs into spaces, return a new line string,
or original line, if no tabs are included.
good idea, to make this one a primitive"
|tmpString nString nTabs
currentMax "{ Class: SmallInteger }"
dstIndex "{ Class: SmallInteger }"
nextTab "{ Class: SmallInteger }" |
line isNil ifTrue:[^ line].
nTabs := line occurrencesOf:(Character tab).
nTabs == 0 ifTrue:[^ line].
currentMax := line size + (nTabs * 7).
tmpString := String new:currentMax.
dstIndex := 1.
line do:[:character |
(character == (Character tab)) ifTrue:[
nextTab := self nextTabAfter:dstIndex.
[dstIndex < nextTab] whileTrue:[
tmpString at:dstIndex put:(Character space).
dstIndex := dstIndex + 1
]
] ifFalse:[
tmpString at:dstIndex put:character.
dstIndex := dstIndex + 1
].
(dstIndex > currentMax) ifTrue:[
"
this cannot happen with <= 8 tabs
"
currentMax := currentMax + currentMax.
nString := String new:currentMax.
nString replaceFrom:1 to:(dstIndex - 1)
with:tmpString startingAt:1.
tmpString := nString.
nString := nil
].
"make stc-optimizer happy
- no need to return value of ifTrue:/ifFalse above"
0
].
dstIndex := dstIndex - 1.
dstIndex == currentMax ifTrue:[
^ tmpString
].
^ tmpString copyTo:dstIndex
!
withTabs:line
"Assuming an 8-character tab,
compress multiple spaces to tabs, return a new line string
or original line, if no tabs where created.
good idea, to make this one a primitive"
|newLine|
line isNil ifTrue:[^ line].
(line startsWith:' ') ifFalse:[^ line].
newLine := line copyFrom:9.
[newLine startsWith:' '] whileTrue:[
newLine := Character tab asString , (newLine copyFrom:9)
].
^ newLine
! !
!ListView methodsFor:'searching'!
searchForwardFor:pattern startingAtLine:startLine col:startCol ifFound:block1 ifAbsent:block2
"search for a pattern, if found evaluate block1 with row/col as arguments, if not
found evaluate block2.
Sorry, but pattern is no regular expression pattern (yet)"
|lineString col savedCursor patternSize
line1 "{Class: SmallInteger}"
line2 "{Class: SmallInteger}"|
patternSize := pattern size.
(list notNil and:[patternSize ~~ 0]) ifTrue:[
savedCursor := cursor.
self cursor:(Cursor questionMark).
"/ searchPattern := pattern.
col := startCol + 1.
line1 := startLine.
line2 := list size.
line1 to:line2 do:[:lnr |
lineString := list at:lnr.
lineString notNil ifTrue:[
col := lineString findString:pattern startingAt:col ifAbsent:[0].
col ~~ 0 ifTrue:[
self cursor:savedCursor.
^ block1 value:lnr value:col.
]
].
col := 1
]
].
"not found"
self cursor:savedCursor.
^ block2 value
!
searchBackwardFor:pattern startingAtLine:startLine col:startCol ifFound:block1 ifAbsent:block2
"search for a pattern, if found evaluate block1 with row/col as arguments, if not
found evaluate block2.
Sorry, but pattern is no regular expression pattern (yet)"
|lineString col cc found firstChar savedCursor patternSize
line1 "{Class: SmallInteger}"|
patternSize := pattern size.
(list notNil and:[patternSize ~~ 0]) ifTrue:[
savedCursor := cursor.
self cursor:(Cursor questionMark).
"/ searchPattern := pattern.
col := startCol - 1.
firstChar := pattern at:1.
col > (list at:startLine) size ifTrue:[
col := nil
].
line1 := startLine.
line1 to:1 by:-1 do:[:lnr |
lineString := list at:lnr.
lineString notNil ifTrue:[
col isNil ifTrue:[col := lineString size - patternSize + 1].
[(col > 0) and:[(lineString at:col) ~~ firstChar]] whileTrue:[
col := col - 1
].
[col > 0] whileTrue:[
cc := col.
found := true.
1 to:patternSize do:[:cnr |
cc > lineString size ifTrue:[
found := false
] ifFalse:[
(pattern at:cnr) ~~ (lineString at:cc) ifTrue:[
found := false
]
].
cc := cc + 1
].
found ifTrue:[
self cursor:savedCursor.
^ block1 value:lnr value:col.
].
col := col - 1.
[(col > 0) and:[(lineString at:col) ~~ firstChar]] whileTrue:[
col := col - 1
]
]
].
col := nil
]
].
"not found"
self cursor:savedCursor.
^ block2 value
!
findBeginOfWordAtLine:selectLine col:selectCol
"return the col of first character of the word at given line/col.
If the character under the initial col is a space character, return
the first col of the blank-block."
|beginCol thisCharacter|
beginCol := selectCol.
thisCharacter := self characterAtLine:selectLine col:beginCol.
"is this acharacter within a word ?"
(wordCheck value:thisCharacter) ifTrue:[
[wordCheck value:thisCharacter] whileTrue:[
beginCol := beginCol - 1.
beginCol < 1 ifTrue:[
thisCharacter := Character space
] ifFalse:[
thisCharacter := self characterAtLine:selectLine col:beginCol
]
].
beginCol := beginCol + 1.
] ifFalse:[
"nope - maybe its a space"
thisCharacter == Character space ifTrue:[
[beginCol > 1 and:[thisCharacter == Character space]] whileTrue:[
beginCol := beginCol - 1.
thisCharacter := self characterAtLine:selectLine col:beginCol
].
thisCharacter ~~ Character space ifTrue:[
beginCol := beginCol + 1.
].
] ifFalse:[
"select single character"
]
].
^ beginCol
!
findEndOfWordAtLine:selectLine col:selectCol
"return the col of last character of the word at given line/col.
If the character under the initial col is a space character, return
the last col of the blank-block.
Return 0 if we should wrap to next line (for spaces)"
|endCol thisCharacter len|
endCol := selectCol.
endCol == 0 ifTrue:[endCol := 1].
thisCharacter := self characterAtLine:selectLine col:endCol.
"is this acharacter within a word ?"
(wordCheck value:thisCharacter) ifTrue:[
thisCharacter := self characterAtLine:selectLine col:endCol.
[wordCheck value:thisCharacter] whileTrue:[
endCol := endCol + 1.
thisCharacter := self characterAtLine:selectLine col:endCol
].
endCol := endCol - 1.
] ifFalse:[
"nope - maybe its a space"
thisCharacter == Character space ifTrue:[
len := (self listAt:selectLine) size.
endCol > len ifTrue:[
"select rest to end"
endCol := 0
] ifFalse:[
thisCharacter := self characterAtLine:selectLine col:endCol.
[endCol <= len and:[thisCharacter == Character space]] whileTrue:[
endCol := endCol + 1.
thisCharacter := self characterAtLine:selectLine col:endCol
].
endCol := endCol - 1.
]
] ifFalse:[
"select single character"
]
].
^ endCol.
! !
!ListView methodsFor:'scrolling'!
viewOrigin
"return the viewOrigin; thats the coordinate of the contents
which is shown topLeft in the view
(i.e. the origin of the visible part of the contents)."
^ viewOrigin
!
gotoLine:aLineNumber
"position to line aLineNumber; this may be redefined
in subclasses (for example to move the cursor also)"
^ self scrollToLine:aLineNumber
!
pageDown
"change origin to display next page"
|nLines|
nLines := nFullLinesShown.
(firstLineShown + nLines + nFullLinesShown > list size) ifTrue:[
nLines := list size - firstLineShown - nFullLinesShown + 1
].
nLines <= 0 ifTrue:[^ self].
self originWillChange.
firstLineShown := firstLineShown + nLines.
self originChanged:nLines.
self redrawFromVisibleLine:1 to:nLinesShown
!
pageUp
"change origin to display previous page"
|oldOrg|
(firstLineShown == 1) ifFalse:[
self originWillChange.
oldOrg := firstLineShown.
firstLineShown := firstLineShown - nFullLinesShown.
(firstLineShown < 1) ifTrue:[
firstLineShown := 1
].
self originChanged:(firstLineShown - oldOrg).
self redrawFromVisibleLine:1 to:nLinesShown
]
!
halfPageDown
"scroll down half a page"
self scrollDown:(nFullLinesShown // 2)
!
halfPageUp
"scroll up half a page"
self scrollUp:(nFullLinesShown // 2)
!
makeLineVisible:aListLineNr
"if aListLineNr is not visible, scroll to make it visible.
Numbering starts with 1 for the very first line of the text."
|bott|
(aListLineNr isNil "or:[shown not]") ifTrue:[^ self].
(aListLineNr >= firstLineShown) ifTrue:[
(aListLineNr < (firstLineShown + nFullLinesShown)) ifTrue:[
^ self
]
].
(aListLineNr < nFullLinesShown) ifTrue:[
^ self scrollToLine:1
].
(nFullLinesShown < 3) ifTrue:[
^ self scrollToLine:aListLineNr
].
bott := self numberOfLines - (nFullLinesShown - 1).
(aListLineNr > bott) ifTrue:[
^ self scrollToLine:bott
].
self scrollToLine:(aListLineNr - (nFullLinesShown // 2) + 1)
!
makeColVisible:aCol inLine:aLineNr
"if column aCol is not visible, scroll horizontal to make it visible"
|xWant xVis visLnr oldLeft|
(aCol isNil or:[shown not]) ifTrue:[^ self].
visLnr := self absoluteLineToVisibleLine:aLineNr.
visLnr isNil ifTrue:[^ self].
xWant := self xOfCol:aCol inVisibleLine:visLnr.
xVis := xWant - leftOffset.
"
dont scroll, if already visible
(but scroll, if not in inner 20%..80% of visible area)
"
"/ ((xVis >= (width // 5)) and:[xVis <= (width * 4 // 5)]) ifTrue:[
"/ ^ self
"/ ].
"
no, the above does not look good, if you click / select at the
far right - makes selecting so difficult ...
"
(xVis >= 0 and:[xVis < (width - font width)]) ifTrue:[^ self].
"/ oldLeft := leftOffset.
self scrollHorizontalTo:(xWant - (width // 2)).
"/ self originChanged:((oldLeft - leftOffset) @ 0)
!
scrollDown:nLines
"change origin to scroll down some lines"
|w "{ Class:SmallInteger }"
h "{ Class:SmallInteger }"
m2 "{ Class:SmallInteger }"
count "{ Class:SmallInteger }"
prevFirst nPixel|
count := nLines.
(firstLineShown + nLines + nFullLinesShown > list size) ifTrue:[
count := list size - firstLineShown - nFullLinesShown + 1
].
count <= 0 ifTrue:[^ self].
self originWillChange.
prevFirst := firstLineShown.
firstLineShown := firstLineShown + count.
nPixel := fontHeight * count.
shown ifFalse:[
viewOrigin := viewOrigin x @ (viewOrigin y + nPixel).
] ifTrue:[
(count >= nLinesShown) ifTrue:[
viewOrigin := viewOrigin x @ (viewOrigin y + nPixel).
self redrawFromVisibleLine:1 to:nLinesShown.
] ifFalse:[
m2 := margin * 2.
w := self widthForScrollBetween:prevFirst
and:(prevFirst + nLinesShown).
w := w + leftMargin.
h := nPixel + textStartTop.
self catchExpose.
self copyFrom:self x:margin y:h
toX:margin y:textStartTop
width:w height:(height - m2 - h).
viewOrigin := viewOrigin x @ (viewOrigin y + nPixel).
self redrawFromVisibleLine:(nFullLinesShown - count + 1)
to:nLinesShown.
self waitForExpose.
].
].
self originChanged:count.
!
scrollDown
"change origin to scroll down one line"
self scrollDown:1
!
scrollUp:nLines
"change origin to scroll up some lines"
|w "{ Class:SmallInteger }"
h "{ Class:SmallInteger }"
count "{ Class:SmallInteger }"
prevFirst nPixel|
count := nLines.
count >= firstLineShown ifTrue:[
count := firstLineShown - 1
].
(count == 0) ifTrue:[^ self].
self originWillChange.
prevFirst := firstLineShown.
firstLineShown := firstLineShown - count.
nPixel := fontHeight * count.
shown ifFalse:[
viewOrigin := viewOrigin x @ (viewOrigin y - nPixel).
] ifTrue:[
(count >= nLinesShown) ifTrue:[
viewOrigin := viewOrigin x @ (viewOrigin y - nPixel).
self redrawFromVisibleLine:1 to:nLinesShown.
] ifFalse:[
w := self widthForScrollBetween:prevFirst
and:(prevFirst + nLinesShown).
w := w + leftMargin.
h := nPixel + topMargin.
self catchExpose.
self copyFrom:self x:margin y:topMargin
toX:margin y:h
width:w height:(height - h - margin).
viewOrigin := viewOrigin x @ (viewOrigin y - nPixel).
self redrawFromVisibleLine:1 to:count.
self waitForExpose.
].
].
self originChanged:(count negated).
!
scrollUp
"change origin to scroll up one line"
self scrollUp:1
!
scrollToTop
"change origin to start of text"
self scrollToLine:1
!
scrollToBottom
"change origin to show end of text"
"scrolling to the end is not really correct (i.e. should scroll to list size - nFullLinesShown),
but scrollDown: will adjust it ..."
self scrollToLine:(list size)
!
scrollToLine:aLineNr
"change origin to make aLineNr be the top line"
aLineNr < firstLineShown ifTrue:[
self scrollUp:(firstLineShown - aLineNr)
] ifFalse:[
aLineNr > firstLineShown ifTrue:[
self scrollDown:(aLineNr - firstLineShown)
]
]
!
scrollToLeft
"change origin to start (left) of text"
leftOffset ~~ 0 ifTrue:[
self scrollToCol:1
]
!
scrollToCol:aColNr
"change origin to make aColNr be the left col"
|pxlOffset|
aColNr == 1 ifTrue:[
leftOffset ~~ 0 ifTrue:[
self scrollLeft:leftOffset.
].
^ self
].
pxlOffset := font width * (aColNr - 1).
pxlOffset < leftOffset ifTrue:[
self scrollLeft:(leftOffset - pxlOffset)
] ifFalse:[
pxlOffset > leftOffset ifTrue:[
self scrollRight:(pxlOffset - leftOffset)
]
]
!
scrollVerticalToPercent:percent
"scroll to a position given in percent of total"
|lineNr|
lineNr := (((self numberOfLines * percent) asFloat / 100.0) + 0.5) asInteger + 1.
self scrollToLine:lineNr
!
scrollSelectUp
"just a template - I do not know anything about selections"
^ self subclassResponsibility
!
scrollSelectDown
"just a template - I do not know anything about selections"
^ self subclassResponsibility
!
startAutoScrollDown:yDistance
"setup for auto-scroll down (when button-press-moving below view)
- timeDelta for scroll is computed from distance"
|deltaT mm|
mm := yDistance // self verticalIntegerPixelPerMillimeter + 1.
deltaT := 0.5 / mm.
(deltaT = autoScrollDeltaT) ifFalse:[
autoScrollDeltaT := deltaT.
autoScrollBlock isNil ifTrue:[
autoScrollBlock := [self scrollSelectDown].
Processor addTimedBlock:autoScrollBlock afterSeconds:deltaT
]
]
!
startAutoScrollUp:yDistance
"setup for auto-scroll up (when button-press-moving below view)
- timeDelta for scroll is computed from distance"
|deltaT mm|
mm := yDistance negated // self verticalIntegerPixelPerMillimeter + 1.
deltaT := 0.5 / mm.
(deltaT = autoScrollDeltaT) ifFalse:[
autoScrollDeltaT := deltaT.
autoScrollBlock isNil ifTrue:[
autoScrollBlock := [self scrollSelectUp].
Processor addTimedBlock:autoScrollBlock afterSeconds:deltaT
]
]
!
startAutoScrollRight:xDistance
"setup for auto-scroll down (when button-press-moving to the right of the view)
- timeDelta for scroll is computed from distance"
|deltaT mm|
mm := xDistance // self horizontalIntegerPixelPerMillimeter + 1.
deltaT := 0.5 / mm.
(deltaT = autoScrollDeltaT) ifFalse:[
autoScrollDeltaT := deltaT.
autoScrollBlock isNil ifTrue:[
autoScrollBlock := [self scrollSelectRight].
Processor addTimedBlock:autoScrollBlock afterSeconds:deltaT
]
]
!
startAutoScrollLeft:xDistance
"setup for auto-scroll up (when button-press-moving to the left of the view)
- timeDelta for scroll is computed from distance"
|deltaT mm|
mm := xDistance negated // self horizontalIntegerPixelPerMillimeter + 1.
deltaT := 0.5 / mm.
(deltaT = autoScrollDeltaT) ifFalse:[
autoScrollDeltaT := deltaT.
autoScrollBlock isNil ifTrue:[
autoScrollBlock := [self scrollSelectLeft].
Processor addTimedBlock:autoScrollBlock afterSeconds:deltaT
]
]
!
stopAutoScroll
"stop any auto-scroll"
autoScrollBlock notNil ifTrue:[
self compressMotionEvents:true.
Processor removeTimedBlock:autoScrollBlock.
autoScrollBlock := nil.
autoScrollDeltaT := nil
].
!
scrollRight
"scroll right by one character
- question is how much is a good for variable fonts"
self scrollRight:font width
!
scrollRight:nPixel
"change origin to scroll right some cols"
|wMax cnt|
cnt := nPixel.
"
commenting out the block below allows scrolling to the right of
the widest line
"
" "
"
the 10 below allows scrolling somewhat behind the end of the line
"
wMax := self widthOfContents + 10.
(leftOffset + nPixel + width > wMax) ifTrue:[
cnt := wMax - leftOffset - width
].
" "
cnt <= 0 ifTrue:[^ self].
self originWillChange.
leftOffset:= leftOffset + cnt.
viewOrigin := leftOffset @ viewOrigin y.
self redrawFromVisibleLine:1 to:nLinesShown.
self originChanged:(cnt @ 0)
!
scrollLeft
"scroll left by one character
- question is how much is a good for variable fonts"
self scrollLeft:font width
!
scrollLeft:nPixel
"change origin to scroll left some cols"
|newLeftOffset|
nPixel <= 0 ifTrue:[^ self].
newLeftOffset := leftOffset - nPixel.
newLeftOffset <= 0 ifTrue:[
leftOffset == 0 ifTrue:[^ self].
newLeftOffset := 0
].
self originWillChange.
leftOffset := newLeftOffset.
viewOrigin := newLeftOffset @ viewOrigin y.
self redrawFromVisibleLine:1 to:nLinesShown.
self originChanged:(0 @ nPixel)
!
scrollHorizontalTo:aPixelOffset
"change origin to make aPixelOffset be the left col"
|orgX|
orgX := leftOffset.
(aPixelOffset < orgX) ifTrue:[
self scrollLeft:(orgX - aPixelOffset)
] ifFalse:[
(aPixelOffset > orgX) ifTrue:[
self scrollRight:(aPixelOffset - orgX)
]
]
! !
!ListView methodsFor:'drawing'!
drawVisibleLine:visLineNr col:col with:fg and:bg
"draw single character at col index of visible line in fg/bg"
|y x lineString characterString|
lineString := self visibleAt:visLineNr.
x := (self xOfCol:col inVisibleLine:visLineNr) - leftOffset.
y := self yOfVisibleLine:visLineNr.
self paint:bg.
(lineString notNil and:[lineString isString not]) ifTrue:[
self drawVisibleLine:visLineNr with:fg and:bg
] ifFalse:[
col > lineString size ifTrue:[
self fillRectangleX:x y:y width:(font width) height:fontHeight.
self paint:fg
] ifFalse:[
characterString := (lineString at:col) asString.
self fillRectangleX:x y:y
width:(font widthOf:characterString)
height:fontHeight.
self paint:fg.
self displayString:characterString x:x y:(y + fontAscent)
]
]
!
drawVisibleLine:visLineNr from:startCol to:endCol with:fg and:bg
"draw part of a visible line in fg/bg"
|y x lineString len characterString|
(endCol >= startCol) ifTrue:[
lineString := self visibleAt:visLineNr.
(lineString notNil and:[lineString isString not]) ifTrue:[
self drawVisibleLine:visLineNr with:fg and:bg.
] ifFalse:[
x := (self xOfCol:startCol inVisibleLine:visLineNr) - leftOffset.
y := (self yOfVisibleLine:visLineNr).
len := lineString size.
(startCol > len) ifTrue:[
len := endCol - startCol + 1.
self paint:bg.
self fillRectangleX:x y:y
width:(fontWidth * len)
height:fontHeight
] ifFalse:[
(endCol > len) ifTrue:[
characterString := String new:endCol.
characterString replaceFrom:1 to:len with:lineString startingAt:1.
lineString := characterString
].
self paint:bg.
self fillRectangleX:x y:y width:(font widthOf:lineString from:startCol to:endCol)
height:fontHeight.
self paint:fg.
self displayString:lineString from:startCol to:endCol x:x y:(y + fontAscent)
]
]
]
!
drawVisibleLine:visLineNr from:startCol with:fg and:bg
"draw right part of a visible line from startCol to end of line in fg/bg"
|y x lineString index1 index2|
(startCol < 1) ifTrue:[
index1 := 1
] ifFalse:[
index1 := startCol
].
y := self yOfVisibleLine:visLineNr.
x := (self xOfCol:index1 inVisibleLine:visLineNr) - leftOffset.
self paint:bg.
self fillRectangleX:x y:y
width:(width + leftOffset - x)
height:fontHeight.
lineString := self visibleAt:visLineNr.
lineString notNil ifTrue:[
lineString isString ifFalse:[
self drawVisibleLine:visLineNr with:fg and:bg.
] ifTrue:[
index2 := lineString size.
(index2 < index1) ifTrue:[^ self].
(index1 <= index2) ifTrue:[
self paint:fg.
self displayString:lineString from:index1 to:index2 x:x y:(y + fontAscent)
]
]
]
!
drawFromVisibleLine:startVisLineNr to:endVisLineNr with:fg and:bg
"draw a visible line range in fg/bg"
|y "{ Class: SmallInteger }"
x "{ Class: SmallInteger }"
startLine "{ Class: SmallInteger }"
endLine "{ Class: SmallInteger }"
listSize e|
y := self yOfVisibleLine:startVisLineNr.
self paint:bg.
self fillRectangleX:margin y:y
width:(width - (margin * 2))
height:(endVisLineNr - startVisLineNr + 1) * fontHeight.
list isNil ifTrue:[^ self].
y := y + fontAscent.
listSize := list size.
startLine := startVisLineNr + firstLineShown - 1.
endLine := endVisLineNr + firstLineShown - 1.
(startLine == 0) ifTrue:[
y := y + fontHeight.
startLine := startLine + 1
].
(endLine > listSize) ifTrue:[
e := listSize
] ifFalse:[
e := endLine
].
(startLine <= e) ifTrue:[
x := textStartLeft - leftOffset.
self paint:fg.
list from:startLine to:e do:[:line |
line notNil ifTrue:[
self displayString:line x:x y:y
].
y := y + fontHeight
]
]
!
drawVisibleLine:visLineNr with:fg and:bg
"draw a visible line in fg/bg"
|y line|
y := self yOfVisibleLine:visLineNr.
line := self visibleAt:visLineNr.
self paint:bg.
self fillRectangleX:margin y:y
width:(width - (margin * 2))
height:fontHeight.
line notNil ifTrue:[
self paint:fg.
self displayString:line x:(textStartLeft - leftOffset) y:(y + fontAscent)
]
! !
!ListView methodsFor:'redrawing'!
flash
"show contents in reverse colors for a moment - to wakeup the user :-)"
|savFg savBg|
savFg := fgColor.
savBg := bgColor.
fgColor := savBg.
bgColor := savFg.
self redraw.
(Delay forSeconds:0.1) wait.
fgColor := savFg.
bgColor := savBg.
self redraw
!
redrawVisibleLine:visLineNr col:col
"redraw single character at col index of visible line"
shown ifTrue:[
self drawVisibleLine:visLineNr col:col with:fgColor and:bgColor
]
!
redrawVisibleLine:visLineNr from:startCol to:endCol
"redraw part of a visible line"
shown ifTrue:[
self drawVisibleLine:visLineNr from:startCol to:endCol with:fgColor and:bgColor
]
!
redrawVisibleLine:visLineNr from:startCol
"redraw right part of a visible line from startCol to end of line"
shown ifTrue:[
self drawVisibleLine:visLineNr from:startCol with:fgColor and:bgColor
]
!
redrawFromVisibleLine:startVisLineNr to:endVisLineNr
"redraw a visible line range"
shown ifTrue:[
self drawFromVisibleLine:startVisLineNr to:endVisLineNr with:fgColor and:bgColor
]
!
redrawVisibleLine:visLineNr
"redraw a visible line"
shown ifTrue:[
self drawVisibleLine:visLineNr with:fgColor and:bgColor
]
!
redrawLine:lineNr col:col
"redraw a single character"
|visibleLine|
visibleLine := self listLineToVisibleLine:lineNr.
visibleLine notNil ifTrue:[
self redrawVisibleLine:visibleLine col:col
]
!
redrawLine:lineNr
"redraw a list line"
|visibleLine|
visibleLine := self listLineToVisibleLine:lineNr.
visibleLine notNil ifTrue:[
self redrawVisibleLine:visibleLine
]
!
redrawLine:lineNr from:startCol
"redraw a list line from startCol to end of line"
|visibleLine|
visibleLine := self listLineToVisibleLine:lineNr.
visibleLine notNil ifTrue:[
self redrawVisibleLine:visibleLine from:startCol
]
!
redrawLine:lineNr from:startCol to:endCol
"redraw a list line from startCol to endCol"
|visibleLine|
visibleLine := self listLineToVisibleLine:lineNr.
visibleLine notNil ifTrue:[
self redrawVisibleLine:visibleLine from:startCol to:endCol
]
!
redrawFromLine:lineNr
"redraw starting at linrNr"
|visibleLine first|
shown ifTrue:[
"if first line to redraw is above 1st visible line,
start redraw at 1st visible line"
(lineNr < firstLineShown) ifTrue:[
first := firstLineShown
] ifFalse:[
first := lineNr
].
visibleLine := self listLineToVisibleLine:first.
visibleLine notNil ifTrue:[
self redrawFromVisibleLine:visibleLine to:nLinesShown
]
]
!
redrawFromLine:start to:end
"redraw lines from start to end"
|visibleFirst visibleLast first last lastLineShown|
shown ifTrue:[
lastLineShown := firstLineShown + nLinesShown - 1.
(start <= lastLineShown) ifTrue:[
(end >= firstLineShown) ifTrue:[
"if first line to redraw is above 1st visible line,
start redraw at 1st visible line"
(start < firstLineShown) ifTrue:[
first := firstLineShown
] ifFalse:[
first := start
].
(end > lastLineShown) ifTrue:[
last := lastLineShown
] ifFalse:[
last := end
].
visibleFirst := self listLineToVisibleLine:first.
visibleLast := self listLineToVisibleLine:last.
self redrawFromVisibleLine:visibleFirst to:visibleLast
]
]
]
!
redraw
"redraw complete view"
shown ifTrue:[
self redrawFromVisibleLine:1 to:nLinesShown
]
! !
!ListView methodsFor:'event processing'!
sizeChanged:how
"size changed - move origin up if possible"
|listSize newOrigin|
self computeNumberOfLinesShown.
innerWidth := width - textStartLeft - margin.
shown ifFalse:[^ self].
list isNil ifTrue:[^ self].
listSize := self numberOfLines.
"
if we are behond the end, scroll up a bit
"
((firstLineShown + nFullLinesShown) > listSize) ifTrue:[
newOrigin := listSize - nFullLinesShown + 1.
newOrigin < 1 ifTrue:[
newOrigin := 1
].
self scrollToLine: newOrigin.
^ self
].
!
redrawX:x y:y width:w height:h
"a region must be redrawn"
|startLine stopLine startCol endCol|
startLine := self visibleLineOfY:y.
stopLine := self visibleLineOfY:(y + h).
"if text-margin is affected"
x < textStartLeft ifTrue:[
self paint:bgColor.
self fillRectangleX:margin y:margin width:(textStartLeft - margin)
height:(height - margin - margin)
].
y < textStartTop ifTrue:[
self paint:bgColor.
self fillRectangleX:margin y:margin width:(width - margin - margin)
height:(textStartTop - margin)
].
(w > (width // 4 * 3)) ifTrue:[
"if area is big enough redraw whole lines"
self redrawFromVisibleLine:startLine to:stopLine
] ifFalse:[
includesNonStrings ifTrue:[
startLine to:stopLine do:[:i |
self redrawVisibleLine:i
]
] ifFalse:[
fontIsFixedWidth ifFalse:[
"start/end col has to be computed for each line"
startLine to:stopLine do:[:i |
startCol := self colOfX:x inVisibleLine:i.
endCol := self colOfX:(x + w) inVisibleLine:i.
startCol > 0 ifTrue:[
endCol > 0 ifTrue:[
self redrawVisibleLine:i from:startCol to:endCol
]
]
]
] ifTrue:[
"start/end col is the same for all lines"
startCol := self colOfX:x inVisibleLine:startLine.
endCol := self colOfX:(x + w) inVisibleLine:startLine.
startCol > 0 ifTrue:[
endCol > 0 ifTrue:[
startLine to:stopLine do:[:i |
self redrawVisibleLine:i from:startCol to:endCol
]
]
]
]
]
]
!
keyPress:key x:x y:y
"a key was pressed - handle page-keys here"
(key == #Prior) ifTrue: [^ self pageUp].
(key == #Next) ifTrue: [^ self pageDown].
(key == #Ctrlb) ifTrue:[^ self pageUp].
(key == #Ctrlf) ifTrue:[^ self pageDown].
(key == #Ctrld) ifTrue:[^ self halfPageDown].
(key == #Ctrlu) ifTrue:[^ self halfPageUp].
(key == #ScrollUp) ifTrue:[^ self scrollUp].
(key == #ScrollDown) ifTrue:[^ self scrollDown].
super keyPress:key x:x y:y
! !