"
COPYRIGHT (c) 1992 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.
"
"{ Package: 'stx:libview' }"
FontDescription subclass:#Font
instanceVariableNames:'device fontId replacementFont ascent descent width isFixedWidth
minWidth maxWidth maxAscent maxDescent minCode maxCode direction'
classVariableNames:'Replacements'
poolDictionaries:''
category:'Graphics-Support'
!
Object subclass:#DeviceFontHandle
instanceVariableNames:'device fontId'
classVariableNames:''
poolDictionaries:''
privateIn:Font
!
!Font class methodsFor:'documentation'!
copyright
"
COPYRIGHT (c) 1992 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.
"
!
documentation
"
Font represents fonts in a device independent manner; after being
created using 'Font family:family face:face style:style size:size',
the returned font is not associated to a specific device.
(therefore, those fonts can be used to draw on any GC)
To get a device font, any font can be sent the message
'aFont on:aDevice' which returns an instance of Font which is
associated to a device (it returns the receiver, if that is already
associated to that device).
For proper operation, each graphics operation working with fonts
must get a device font before doing the draw.
Most draw methods in DeviceDrawable do that automatically for you,
before doing the draw; so you do not have to care.
However, some operations require explicit conversion to a device font
before being allowed. For example, a query for a fonts height (in device
units) can only be done if the font being asked is associated to
a device (which should be clear, since a 'courier-roman-12' font may
have a different number of pixels on a 75dpi vs. a 120dpi display. And
a totally different number of device units on a 600dpi laser printer.
Thus, to query a font for its height (or ascent, or descent, or width),
use something like:
myFont := Font family:'courier' ... size:12.
...
'want to know its height on the Display'
h := (myFont on:Display) height.
'want to know its height on a printer'
h := (myFont on:aPrinter) height.
there are alternative shortcuts for these operations:
h := myFont heightOn:Display.
h := myFont heightOn:Printer.
or:
a := myFont ascentOn:Display.
Keep in mind, that each device is free to think in whatever units it
likes - a display may return units of pixels, a postscript printer may
think in (fractions of) inches, a dot matrix printer may think in dots.
Also, notice that currently only graphic displays are really supported;
printer devices are being developped and may or may not be in the current
system.
If a font cannot be represented on a device, a replacement
font is chosen and kept in the replacementFont instance variable.
This is done to preserve the original font information, in case the image
is restarted later on another display which has that font available.
[Instance variables:]
family <String> the fonts family ('courier', 'helvetica' etc)
face <String> the fonts face ('bold', 'medium' etc)
style <String> the fonts style ('roman', 'italic', 'oblique')
size <String> the fonts size (not in pixels)
encoding <Symbol> the fonts encoding (usually #iso8859)
device <Object> the device the font is associated to, or nil
fontId <Object> the id of the font on that device, or nil
replacement <Font> the replacement font or nil
ascent <Integer> the fonts ascent in device units on device
descent <Integer> the fonts descent in device units on device
width <Integer> the character width in device units on device
(for variable fonts, its the width of a space)
isFixedWidth <Boolean> true if font is a fixed width font
minWidth <Integer> width of the smallest-width character in
in device units on device
maxWidth <Integer> width of the largest-width character in
in device units on device
[class variables:]
Replacements <Dictionary> replacement fonts
[see also:]
DeviceWorkstation
DeviceDrawable GraphicsContext
Cursor Color
( introduction to view programming :html: programming/viewintro.html#FONTS )
[author:]
Claus Gittinger
"
!
examples
"
standard fonts:
aFont := Font family:'courier' size:12
aFont := Font
family:'helvetica'
face:'roman'
style:'bold'
size:16
special (non-portable displayType specific) fonts:
aFont := Font name:'6x10'
aFont := Font name:'k14'
setting the font of a button:
[exBegin]
|b|
b := Button new.
b label:'hello'.
b font:(Font family:'helvetica'
face:'medium'
style:'roman'
size:16).
b open
[exEnd]
asking a font about a strings size in pixels,
if it was used on some device:
aFont widthOf:'hello' on:Display
asking about the ascent, if used on some device:
aFont ascentOn:Display
if the font has been associated to a device, the following are
a bit faster:
|aFont|
...
aFont := aFont on:aDevice.
...
aFont widthOf:'hello'
...
aFont ascent
...
"
! !
!Font class methodsFor:'initialization'!
initialize
"initialize the font tracking array"
"
replacement handling is not yet finished
"
Replacements isNil ifTrue:[
Replacements := Dictionary new.
Replacements at:'clean' put:'courier'.
Replacements at:'fixed' put:'courier'.
Replacements at:'new century schoolbook' put:'times'.
Replacements at:'lucida' put:'helvetica'.
Replacements at:'lucidabright' put:'helvetica'.
Replacements at:'lucidatypewriter' put:'courier'.
Replacements at:'charter' put:'times'.
Replacements at:'terminal' put:'courier'.
]
! !
!Font class methodsFor:'instance creation'!
family:familyString face:faceString style:styleString size:sizeNum encoding:encodingSym
"returns a font for given family, face, style, size and encoding.
The returned font is not associated to a specific device"
|family newFont|
(familyString at:1) isUppercase ifTrue:[
family := familyString asLowercase
] ifFalse:[
family := familyString
].
"look if this font is already known on the default device
(the most common case)"
Display notNil ifTrue:[
Display deviceFonts do:[:aFont |
(aFont family = family) ifTrue:[
(aFont face = faceString) ifTrue:[
(aFont style = styleString
or:[styleString = 'italic' and:[aFont style = 'oblique']]) ifTrue:[
(aFont size == sizeNum) ifTrue:[
(encodingSym isNil or:[aFont encoding == encodingSym]) ifTrue:[
^ aFont
]
]
]
]
]
]
].
newFont := self basicNew
setFamily:familyString
face:faceString
style:styleString
size:sizeNum
encoding:encodingSym
device:nil.
^ newFont
"Modified: / 26.9.1999 / 13:49:45 / cg"
! !
!Font methodsFor:'accessing'!
device
"return the device I am on.
Obsolete - use #graphicsDevice"
<resource:#obsolete>
^ device
!
fontId
"return the device-dependent font-id"
^ fontId
!
graphicsDevice
"same as #device, for ST-80 compatibility naming.
Return the device I am associated with."
^ device
"Created: 28.5.1996 / 18:39:53 / cg"
! !
!Font methodsFor:'copying'!
deepCopyUsing:aDictionary
^ self
! !
!Font methodsFor:'displaying'!
displayString:aString from:index1 to:index2 x:x y:y in:aGC opaque:opaque
"this is only called for fonts which have a nil fontId,
and therefore use the replacementFont. Should never be called
for non-replacement fonts."
|prevFont|
prevFont := aGC font.
replacementFont isNil ifTrue:[
fontId notNil ifTrue:[
aGC basicFont:self.
aGC displayString:aString from:index1 to:index2 x:x y:y opaque:opaque.
] ifFalse:[
'Font: [warning]: no replacementFont. should not happen' errorPrintCR.
].
] ifFalse:[
aGC basicFont:replacementFont.
aGC displayString:aString from:index1 to:index2 x:x y:y opaque:opaque.
].
aGC basicFont:prevFont.
"Modified: 10.1.1997 / 17:51:17 / cg"
! !
!Font methodsFor:'getting a device font'!
onDevice:aDevice
"create a new Font representing the same font as
myself on aDevice; if one already exists, return the one."
|newFont rep nearestFont|
"if I am already assigned to that device ..."
(device == aDevice) ifTrue:[^ self].
aDevice isNil ifTrue:[^ self].
"first look if not already there"
aDevice deviceFonts do:[:aFont |
(family = aFont family) ifTrue:[
(face = aFont face) ifTrue:[
(style = aFont style) ifTrue:[
(encoding isNil or:[encoding == aFont encoding]) ifTrue:[
(size == aFont size) ifTrue:[
^ aFont
].
nearestFont isNil ifTrue:[
"font exists, but has different size,
remember the font with the nearest size"
nearestFont = aFont.
] ifFalse:[
((nearestFont size - size) abs > (aFont size - size) abs) ifTrue:[
nearestFont := aFont.
].
].
]
]
]
]
].
newFont := self onDevice:aDevice ifAbsent:nil.
newFont isNil ifTrue:[
"oops did not work - (device has no such font)"
aDevice isOpen ifFalse:[
"/ the display device is not connected
"/ (or has a broken connection).
aDevice class drawingOnClosedDeviceSignal raiseRequestWith:aDevice.
^ self.
].
rep := self replacementFontOnDevice:aDevice.
device isNil ifTrue:[
device := aDevice.
replacementFont := rep.
aDevice registerFont:self.
^ self
].
newFont := (self class basicNew)
setFamily:family face:face style:style size:size encoding:encoding device:aDevice.
newFont setReplacementFont:rep.
aDevice registerFont:newFont.
^ newFont
].
^ newFont
"
Font family:'foo' size:17
"
"Modified: 14.4.1997 / 18:22:31 / cg"
!
onDevice:aDevice ifAbsent:exceptionBlock
"create a new Font representing the same font as
myself on aDevice. This does NOT try to look for existing
or replacement fonts (i.e. can be used to get physical fonts)."
|id|
"receiver was not associated - do it now"
device isNil ifTrue:[
"ask that device for the font"
id := aDevice getFontWithFamily:family face:face style:style size:size encoding:encoding.
id isNil ifTrue:[
"oops did not work - (device has no such font)"
^ exceptionBlock value
].
device := aDevice.
fontId := id.
self getFontInfos.
aDevice registerFont:self.
^ self
].
"receiver was already associated to another device - need a new font"
^ super onDevice:aDevice ifAbsent:exceptionBlock
!
replacementFontOnDevice:aDevice
"return a replacement font for the receiver - this is needed, if
an image is restored on another type of display, or one which has
a different set of fonts."
|id f alternative trySize|
"try font with smaller size"
trySize := size - 1.
[
id := aDevice getFontWithFamily:family
face:face
style:style
size:trySize
encoding:encoding.
] doWhile:[id isNil and:[trySize := trySize - 1. trySize > 4]].
id notNil ifTrue:[
('Font [info]: use alternative size ', trySize printString, ' for ' , (self userFriendlyName)) infoPrintCR.
] ifFalse:[
alternative := Replacements at:family ifAbsent:nil.
alternative notNil ifTrue:[
trySize := size - 1.
[
id := aDevice getFontWithFamily:alternative
face:face
style:style
size:trySize
encoding:encoding.
] doWhile:[id isNil and:[trySize := trySize - 1. trySize > 4]].
].
id notNil ifTrue:[
('Font [info]: use alternative for ' , (self userFriendlyName)) infoPrintCR.
] ifFalse:[
id := aDevice getDefaultFont.
('Font [info]: use default for ' , (self userFriendlyName)) infoPrintCR.
].
id isNil ifTrue:[
"oops did not work - this is a serious an error"
self error:'cannot get default font' mayProceed:true.
^ nil
].
].
f := self class basicNew.
f setDevice:aDevice fontId:id.
f getFontInfos.
aDevice registerFont:f.
^ f
"Modified: 10.1.1997 / 15:40:21 / cg"
! !
!Font methodsFor:'instance release'!
executor
"redefined to return a lightweight copy
- all we need is the device handle"
^ DeviceFontHandle basicNew setDevice:device fontId:fontId.
"Modified: / 20.4.1996 / 23:23:04 / cg"
"Modified: / 3.2.1999 / 16:13:10 / stefan"
! !
!Font methodsFor:'printing & storing'!
elementDescriptorFor:aspect
"binary storage encoding vector"
^ Array
with:(#family->self family)
with:(#face->self face)
with:(#style->self style)
with:(#size->self size)
with:(#encoding->self encoding)
!
printOn:aStream
"append a user printed representation of the receiver to aStream.
The format is suitable for a human - not meant to be read back.
Redefined to print more about the fonts name"
face isNil ifTrue:[
family isNil ifTrue:[
aStream nextPutAll:('a replacement-Font').
^ self
].
aStream nextPutAll:('a ' , family , '-Font').
^ self.
].
aStream nextPutAll:('a ' , family , '-' ,
face , '-' ,
style , '-' ,
size printString ,
' (' , encoding printString , ')' ,
'-Font')
"Modified: 20.4.1996 / 23:25:11 / cg"
!
storeOn:aStream
"append a character sequence to the argument, aStream from which the
receiver can be reconstructed using readFrom:."
aStream nextPutAll:'(Font family:'. family storeOn:aStream.
aStream nextPutAll:' face:'. face storeOn:aStream.
aStream nextPutAll:' style:'. style storeOn:aStream.
aStream nextPutAll:' size:'. size storeOn:aStream.
aStream nextPutAll:' encoding:'. encoding storeOn:aStream.
aStream nextPut:$)
"
(Font family:'helvetica' size:10) storeString
"
! !
!Font methodsFor:'private'!
getFontInfos
"ask the device about all of my actual attributes"
|info|
replacementFont notNil ifTrue:[
replacementFont getFontInfos.
^ self
].
info := self getFontMetrics.
minCode := info minCode.
maxCode := info maxCode.
direction := info direction.
encoding := info encoding.
encoding isNil ifTrue:[
encoding := device encodingOf:fontId.
].
ascent := info ascent.
descent := info descent.
maxAscent := info maxAscent.
maxDescent := info maxDescent.
minWidth := info minWidth.
maxWidth := info maxWidth.
width := info averageWidth.
width < minWidth ifTrue:[
"/ some systems/fonts return a wrong value (0) as width of a space
"/ - at least with X11 ...
width := minWidth
].
isFixedWidth := minWidth == maxWidth
"Modified: 22.5.1996 / 13:08:40 / cg"
!
getFontMetrics
"ask the device about all of my actual attributes"
replacementFont notNil ifTrue:[
^ replacementFont getFontMetrics
].
^ device fontMetricsOf:fontId.
!
getFontResolution
"ask the device about all of my actual attributes"
|f|
f := fontId.
replacementFont notNil ifTrue:[
f := replacementFont fontId.
].
^ device fontResolutionOf:f.
!
releaseFromDevice
"I am no longer available on the device"
device := nil.
fontId := nil.
replacementFont := nil
"Modified: 20.4.1996 / 23:26:26 / cg"
!
restored
"flush device handles when restored"
device := nil.
fontId := nil.
replacementFont := nil
"Modified: 20.4.1996 / 23:26:26 / cg"
!
setDevice:aDevice
"set the device handle"
device := aDevice
"Modified: 20.4.1996 / 23:26:35 / cg"
!
setDevice:aDevice fontId:aFontId
"set the device and font handles"
device := aDevice.
fontId := aFontId
"Modified: 20.4.1996 / 23:26:43 / cg"
!
setFamily:familyString face:faceString style:styleString size:sizeNum encoding:encodingSym device:aDevice
"set my instance attributes"
family := familyString.
face := faceString.
style := styleString.
size := sizeNum.
encoding := encodingSym.
device := aDevice
"Modified: 20.4.1996 / 23:26:56 / cg"
!
setFontId:aFontId
"set my font handle"
fontId := aFontId
"Modified: 20.4.1996 / 23:27:05 / cg"
!
setReplacementFont:aFont
"set my replacement font"
replacementFont := aFont
"Modified: 20.4.1996 / 23:27:16 / cg"
! !
!Font methodsFor:'queries-deviceFonts'!
fullName
"return the full (device specific) name of the receiver.
This is query only valid if the receiver is associated to a device"
device isNil ifTrue:[
^ nil
].
^ device fullFontNameOf:fontId.
"
((Font name:'6x10') on:Display) fullName
"
"Modified: 30.4.1996 / 17:30:10 / cg"
!
isFixedWidth
"return true, if all characters have same width (as in courier).
The receiver must be associated to a device,
for this query to be legal."
device isNil ifTrue:[
self errorNoDevice.
].
replacementFont notNil ifTrue:[
^ replacementFont isFixedWidth
].
^ isFixedWidth
! !
!Font methodsFor:'queries-dimensions'!
ascent
"return the font-ascent (i.e. the normal average of all characters);
That is the number of units (usually pixels) above the baseline.
The receiver must be associated to a device,
for this query to be legal."
device isNil ifTrue:[
self errorNoDevice
].
replacementFont notNil ifTrue:[
^ replacementFont ascent
].
^ ascent
!
ascentOn:aDevice
"return the fonts ascent (average), if used on aDevice."
replacementFont notNil ifTrue:[
^ replacementFont ascentOn:aDevice
].
device == aDevice ifTrue:[
^ ascent
].
^ (self onDevice:aDevice) ascent
"Created: / 30.4.1996 / 16:41:32 / cg"
"Modified: / 10.9.1998 / 12:09:06 / cg"
!
descent
"return the font-descent (i.e. the normal average of all characters);
That is the number of units (usually pixels) below the baseline.
The receiver must be associated to a device,
for this query to be legal."
device isNil ifTrue:[
self errorNoDevice
].
replacementFont notNil ifTrue:[
^ replacementFont descent
].
^ descent
!
descentOn:aDevice
"return the fonts descent (average), if used on aDevice."
replacementFont notNil ifTrue:[
^ replacementFont descentOn:aDevice
].
device == aDevice ifTrue:[
^ descent
].
^ (self onDevice:aDevice) descent
"Created: / 30.4.1996 / 16:41:43 / cg"
"Modified: / 10.9.1998 / 12:09:30 / cg"
!
height
"return the fonts characters normal (average) height;
That is the number of units (usually pixels) on the device.
The receiver must be associated to a device,
for this query to be legal."
device isNil ifTrue:[
self errorNoDevice.
].
replacementFont notNil ifTrue:[
^ replacementFont height
].
^ descent + ascent.
!
heightOf:textOrString
"return the height (device specific) of the argument;
the argument must be a String.
CAVEAT:
currently only constant height fonts are supported."
device isNil ifTrue:[
self errorNoDevice.
^ 0
].
replacementFont notNil ifTrue:[
^ replacementFont heightOf:textOrString
].
^ descent + ascent
"Created: 12.5.1996 / 11:05:00 / cg"
!
heightOf:aString on:aDevice
"return the height of aString, if displayed on aDevice.
The argument must be a string-like object."
replacementFont notNil ifTrue:[
^ replacementFont heightOf:aString on:aDevice
].
device == aDevice ifTrue:[
^ self heightOf:aString
].
^ (self onDevice:aDevice) heightOf:aString
"Created: / 30.4.1996 / 17:14:18 / cg"
"Modified: / 10.9.1998 / 12:09:47 / cg"
!
heightOn:aDevice
"return the fonts height (average), if used on aDevice."
replacementFont notNil ifTrue:[
^ replacementFont heightOn:aDevice
].
device == aDevice ifTrue:[
^ descent + ascent
].
^ (self onDevice:aDevice) height
"Created: / 30.4.1996 / 16:41:59 / cg"
"Modified: / 10.9.1998 / 12:08:18 / cg"
!
maxAscent
"return the fonts maximum-ascent (i.e. the maximum of all characters);
That is the number of units (usually pixels) above the baseline.
The receiver must be associated to a device,
for this query to be legal."
device isNil ifTrue:[
self errorNoDevice
].
replacementFont notNil ifTrue:[
^ replacementFont maxAscent
].
^ maxAscent
!
maxDescent
"return the font-descent (i.e. the maximum of all characters);
That is the number of units (usually pixels) below the baseline.
The receiver must be associated to a device,
for this query to be legal."
device isNil ifTrue:[
self errorNoDevice
].
replacementFont notNil ifTrue:[
^ replacementFont maxDescent
].
^ maxDescent
!
maxHeight
"return the fonts characters maximum height;
That is the number of units (usually pixels) on the device.
The receiver must be associated to a device,
for this query to be legal."
device isNil ifTrue:[
self errorNoDevice.
].
replacementFont notNil ifTrue:[
^ replacementFont maxHeight
].
^ maxDescent + maxAscent.
!
maxWidth
"return the width of the widest character;
if the receiver is a fixed width font its the width of every character.
The receiver must be associated to a device,
for this query to be legal."
device isNil ifTrue:[
self errorNoDevice
].
replacementFont notNil ifTrue:[
^ replacementFont maxWidth
].
^ maxWidth
!
minWidth
"return the width of the smallest character;
if the receiver is a fixed width font its the width of every character.
The receiver must be associated to a device,
for this query to be legal."
device isNil ifTrue:[
self errorNoDevice
].
replacementFont notNil ifTrue:[
^ replacementFont minWidth
].
^ minWidth
!
width
"return the fonts characters width;
That is the number of units (usually pixels) on the device.
For variable pitch fonts, the width of the space character is returned.
For fixed fonts, this is the same as minWidth or maxWidth (or any character).
The receiver must be associated to a device, for this query to be legal."
device isNil ifTrue:[
self errorNoDevice.
].
replacementFont notNil ifTrue:[
^ replacementFont width
].
^ width
"Modified: 30.4.1996 / 16:43:45 / cg"
!
widthOf:textOrString
"return the width (device specific) of the argument;
the argument may be a Character, String or some Text;
in the last case the width of the longest line in the text is returned.
The receiver must be associated to a device,
for this query to be legal."
|this max string|
device isNil ifTrue:[
self errorNoDevice.
^ 0
].
replacementFont notNil ifTrue:[
^ replacementFont widthOf:textOrString
].
(textOrString isString) ifTrue:[
string := textOrString string.
isFixedWidth ifFalse:[
^ device widthOf:string inFont:fontId
].
^ width * string size
].
(textOrString isCharacter) ifTrue:[
isFixedWidth ifFalse:[
^ device widthOf:textOrString asString inFont:fontId
].
^ width
].
max := 0.
isFixedWidth ifFalse:[
textOrString do:[:line |
line notNil ifTrue:[
this := device widthOf:line asString inFont:fontId.
(this > max) ifTrue:[max := this]
]
].
^ max
].
textOrString do:[:lineString |
this := lineString size.
(this > max) ifTrue:[max := this]
].
^ max * width
"Modified: 22.10.1996 / 17:11:14 / cg"
!
widthOf:aString from:start to:stop
"return the width of a substring.
The receiver must be associated to a device,
for this query to be legal."
device isNil ifTrue:[
self errorNoDevice.
^ 0
].
replacementFont notNil ifTrue:[
^ replacementFont widthOf:aString from:start to:stop
].
(stop < start) ifTrue:[^ 0].
isFixedWidth ifFalse:[
stop-start > 10000 ifTrue:[
^ (stop - start + 1) * width
].
^ device widthOf:aString from:start to:stop inFont:fontId
].
^ (stop - start + 1) * width
!
widthOf:aString from:startIndex to:endIndex on:aDevice
"return the width of substring, if displayed on aDevice.
The argument may be a Character, String or some Text;
in the last case the width of the longest line in the text is returned."
replacementFont notNil ifTrue:[
^ replacementFont widthOf:aString from:startIndex to:endIndex on:aDevice
].
device == aDevice ifTrue:[
^ self widthOf:aString from:startIndex to:endIndex
].
^ (self onDevice:aDevice) widthOf:aString from:startIndex to:endIndex
"Created: / 30.4.1996 / 17:15:20 / cg"
"Modified: / 10.9.1998 / 12:10:11 / cg"
!
widthOf:aString on:aDevice
"return the width of aString, if displayed on aDevice.
The argument may be a Character, String or some Text;
in the last case the width of the longest line in the text is returned."
replacementFont notNil ifTrue:[
^ replacementFont widthOf:aString on:aDevice
].
device == aDevice ifTrue:[
^ self widthOf:aString
].
^ (self onDevice:aDevice) widthOf:aString
"Created: / 30.4.1996 / 17:14:18 / cg"
"Modified: / 10.9.1998 / 12:10:26 / cg"
!
widthOn:aDevice
"return the fonts width, if used on aDevice.
For variable pitch fonts, the width of the space character is returned.
For fixed fonts, this is the same as minWidth or maxWidth (or any character)."
replacementFont notNil ifTrue:[
^ replacementFont widthOn:aDevice
].
device == aDevice ifTrue:[
^ self width
].
^ (self onDevice:aDevice) width
"Created: / 30.4.1996 / 16:42:28 / cg"
"Modified: / 10.9.1998 / 12:11:33 / cg"
! !
!Font methodsFor:'queries-misc'!
direction
device isNil ifTrue:[
self errorNoDevice
].
replacementFont notNil ifTrue:[
^ replacementFont direction
].
^ direction
!
maxAscii
"squeak compatibility"
^ self maxCode
!
maxCode
device isNil ifTrue:[
self errorNoDevice
].
replacementFont notNil ifTrue:[
^ replacementFont maxCode
].
^ maxCode
!
minAscii
"squeak compatibility"
^ self minCode
!
minCode
device isNil ifTrue:[
self errorNoDevice
].
replacementFont notNil ifTrue:[
^ replacementFont minCode
].
^ minCode
! !
!Font methodsFor:'st-80 queries'!
fixedWidth
"return true, if this font is a fixed width font -
for st-80 compatibility"
^ self isFixedWidth
!
pixelSize
"return the height of the font in pixels -
for st-80 compatibility"
^ self height
! !
!Font::DeviceFontHandle class methodsFor:'documentation'!
documentation
"
This is used as a finalization handle for fonts.
[author:]
Stefan Vogel (stefan@nilpferd)
[see also:]
Font
[instance variables:]
[class variables:]
"
! !
!Font::DeviceFontHandle methodsFor:'accessing'!
setDevice:aDevice fontId:anId
"set the handles contents"
device := aDevice.
fontId := anId.
"Created: / 3.2.1999 / 16:08:31 / stefan"
! !
!Font::DeviceFontHandle methodsFor:'finalization'!
finalize
"some Font has been collected - tell it to the x-server"
|id|
(id := fontId) notNil ifTrue:[
fontId := nil.
device releaseFont:id.
]
"Created: / 3.2.1999 / 16:09:25 / stefan"
! !
!Font class methodsFor:'documentation'!
version
^ '$Header: /cvs/stx/stx/libview/Font.st,v 1.98 2006-08-23 14:06:03 cg Exp $'
! !
Font initialize!