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-rw-r--r--git-gui/lib/class.tcl154
1 files changed, 154 insertions, 0 deletions
diff --git a/git-gui/lib/class.tcl b/git-gui/lib/class.tcl
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+# git-gui simple class/object fake-alike
+# Copyright (C) 2007 Shawn Pearce
+
+proc class {class body} {
+ if {[namespace exists $class]} {
+ error "class $class already declared"
+ }
+ namespace eval $class {
+ variable __nextid 0
+ variable __sealed 0
+ variable __field_list {}
+ variable __field_array
+
+ proc cb {name args} {
+ upvar this this
+ set args [linsert $args 0 $name $this]
+ return [uplevel [list namespace code $args]]
+ }
+ }
+ namespace eval $class $body
+}
+
+proc field {name args} {
+ set class [uplevel {namespace current}]
+ variable ${class}::__sealed
+ variable ${class}::__field_array
+
+ switch [llength $args] {
+ 0 { set new [list $name] }
+ 1 { set new [list $name [lindex $args 0]] }
+ default { error "wrong # args: field name value?" }
+ }
+
+ if {$__sealed} {
+ error "class $class is sealed (cannot add new fields)"
+ }
+
+ if {[catch {set old $__field_array($name)}]} {
+ variable ${class}::__field_list
+ lappend __field_list $new
+ set __field_array($name) 1
+ } else {
+ error "field $name already declared"
+ }
+}
+
+proc constructor {name params body} {
+ set class [uplevel {namespace current}]
+ set ${class}::__sealed 1
+ variable ${class}::__field_list
+ set mbodyc {}
+
+ append mbodyc {set this } $class
+ append mbodyc {::__o[incr } $class {::__nextid]} \;
+ append mbodyc {namespace eval $this {}} \;
+
+ if {$__field_list ne {}} {
+ append mbodyc {upvar #0}
+ foreach n $__field_list {
+ set n [lindex $n 0]
+ append mbodyc { ${this}::} $n { } $n
+ regsub -all @$n\\M $body "\${this}::$n" body
+ }
+ append mbodyc \;
+ foreach n $__field_list {
+ if {[llength $n] == 2} {
+ append mbodyc \
+ {set } [lindex $n 0] { } [list [lindex $n 1]] \;
+ }
+ }
+ }
+ append mbodyc $body
+ namespace eval $class [list proc $name $params $mbodyc]
+}
+
+proc method {name params body {deleted {}} {del_body {}}} {
+ set class [uplevel {namespace current}]
+ set ${class}::__sealed 1
+ variable ${class}::__field_list
+ set params [linsert $params 0 this]
+ set mbodyc {}
+
+ switch $deleted {
+ {} {}
+ ifdeleted {
+ append mbodyc {if {![namespace exists $this]} }
+ append mbodyc \{ $del_body \; return \} \;
+ }
+ default {
+ error "wrong # args: method name args body (ifdeleted body)?"
+ }
+ }
+
+ set decl {}
+ foreach n $__field_list {
+ set n [lindex $n 0]
+ if {[regexp -- $n\\M $body]} {
+ if { [regexp -all -- $n\\M $body] == 1
+ && [regexp -all -- \\\$$n\\M $body] == 1
+ && [regexp -all -- \\\$$n\\( $body] == 0} {
+ regsub -all \\\$$n\\M $body "\[set \${this}::$n\]" body
+ } else {
+ append decl { ${this}::} $n { } $n
+ regsub -all @$n\\M $body "\${this}::$n" body
+ }
+ }
+ }
+ if {$decl ne {}} {
+ append mbodyc {upvar #0} $decl \;
+ }
+ append mbodyc $body
+ namespace eval $class [list proc $name $params $mbodyc]
+}
+
+proc delete_this {{t {}}} {
+ if {$t eq {}} {
+ upvar this this
+ set t $this
+ }
+ if {[namespace exists $t]} {namespace delete $t}
+}
+
+proc make_toplevel {t w} {
+ upvar $t top $w pfx
+ if {[winfo ismapped .]} {
+ upvar this this
+ regsub -all {::} $this {__} w
+ set top .$w
+ set pfx $top
+ toplevel $top
+ } else {
+ set top .
+ set pfx {}
+ }
+}
+
+
+## auto_mkindex support for class/constructor/method
+##
+auto_mkindex_parser::command class {name body} {
+ variable parser
+ variable contextStack
+ set contextStack [linsert $contextStack 0 $name]
+ $parser eval [list _%@namespace eval $name] $body
+ set contextStack [lrange $contextStack 1 end]
+}
+auto_mkindex_parser::command constructor {name args} {
+ variable index
+ variable scriptFile
+ append index [list set auto_index([fullname $name])] \
+ [format { [list source [file join $dir %s]]} \
+ [file split $scriptFile]] "\n"
+}
+