gitk: Implement "permanent" views (stored in ~/.gitk)

With this the user can now mark a view as "permanent" and it will
appear in the list every time gitk is started (until it is deleted).
Also tidied up the view definition window, and changed the view
menu to use radiobuttons for the view selections so there is some
feedback as to which is the current view.

Signed-off-by: Paul Mackerras <paulus@samba.org>

gitk

@@ -362,7 +362,8 @@ proc makewindow {} {
     .bar.view add command -label "New view..." -command newview
     .bar.view add command -label "Delete view" -command delview -state disabled
     .bar.view add separator
-    .bar.view add command -label "All files" -command {showview 0}
+    .bar.view add radiobutton -label "All files" -command {showview 0} \
+	-variable selectedview -value 0
     menu .bar.help
     .bar add cascade -label "Help" -menu .bar.help
     .bar.help add command -label "About gitk" -command about
@@ -632,6 +633,7 @@ proc savestuff {w} {
     global canv canv2 canv3 ctext cflist mainfont textfont uifont
     global stuffsaved findmergefiles maxgraphpct
     global maxwidth
+    global viewname viewfiles viewperm nextviewnum
 
     if {$stuffsaved} return
     if {![winfo viewable .]} return
@@ -655,6 +657,13 @@ proc savestuff {w} {
 	set wid [expr {([winfo width $cflist] - 11) \
 			   / [font measure [$cflist cget -font] "0"]}]
 	puts $f "set geometry(cflistw) $wid"
+	puts -nonewline $f "set permviews {"
+	for {set v 0} {$v < $nextviewnum} {incr v} {
+	    if {$viewperm($v)} {
+		puts $f "{[list $viewname($v) $viewfiles($v)]}"
+	    }
+	}
+	puts $f "}"
 	close $f
 	file rename -force "~/.gitk-new" "~/.gitk"
     }
@@ -797,7 +806,7 @@ f		Scroll diff view to next file
 }
 
 proc newview {} {
-    global newviewname nextviewnum newviewtop
+    global newviewname nextviewnum newviewtop newviewperm uifont
 
     set top .gitkview
     if {[winfo exists $top]} {
@@ -807,14 +816,18 @@ proc newview {} {
     set newviewtop $top
     toplevel $top
     wm title $top "Gitk view definition"
-    label $top.nl -text "Name"
+    label $top.nl -text "Name" -font $uifont
     entry $top.name -width 20 -textvariable newviewname
     set newviewname "View $nextviewnum"
-    grid $top.nl $top.name -sticky w
-    label $top.l -text "Files and directories to include:"
-    grid $top.l - -sticky w -pady 10
-    text $top.t -width 30 -height 10
-    grid $top.t - -sticky w
+    grid $top.nl $top.name -sticky w -pady 5
+    set newviewperm 0
+    checkbutton $top.perm -text "Remember this view" -variable newviewperm
+    grid $top.perm - -pady 5 -sticky w
+    message $top.l -aspect 500 -font $uifont \
+	-text "Enter files and directories to include, one per line:"
+    grid $top.l - -sticky w
+    text $top.t -width 40 -height 10 -background white
+    grid $top.t - -sticky w -padx 5
     frame $top.buts
     button $top.buts.ok -text "OK" -command newviewok
     button $top.buts.can -text "Cancel" -command newviewcan
@@ -826,12 +839,13 @@ proc newview {} {
 }
 
 proc newviewok {} {
-    global newviewtop nextviewnum
-    global viewname viewfiles
+    global newviewtop nextviewnum newviewperm
+    global viewname viewfiles viewperm selectedview
 
     set n $nextviewnum
     incr nextviewnum
     set viewname($n) [$newviewtop.name get]
+    set viewperm($n) $newviewperm
     set files {}
     foreach f [split [$newviewtop.t get 0.0 end] "\n"] {
 	set ft [string trim $f]
@@ -842,7 +856,8 @@ proc newviewok {} {
     set viewfiles($n) $files
     catch {destroy $newviewtop}
     unset newviewtop
-    .bar.view add command -label $viewname($n) -command [list showview $n]
+    .bar.view add radiobutton -label $viewname($n) \
+	-command [list showview $n] -variable selectedview -value $n
     after idle showview $n
 }
 
@@ -854,7 +869,7 @@ proc newviewcan {} {
 }
 
 proc delview {} {
-    global curview viewdata
+    global curview viewdata viewperm
 
     if {$curview == 0} return
     set nmenu [.bar.view index end]
@@ -866,6 +881,7 @@ proc delview {} {
 	}
     }
     set viewdata($curview) {}
+    set viewperm($curview) 0
     showview 0
 }
 
@@ -898,6 +914,7 @@ proc showview {n} {
     global pending_select phase
     global commitidx rowlaidout rowoptim linesegends leftover
     global commfd nextupdate
+    global selectedview
 
     if {$n == $curview} return
     set selid {}
@@ -939,6 +956,7 @@ proc showview {n} {
     clear_display
 
     set curview $n
+    set selectedview $n
     .bar.view entryconf 2 -state [expr {$n == 0? "disabled": "normal"}]
 
     if {![info exists viewdata($n)]} {
@@ -4209,7 +4227,9 @@ set optim_delay 16
 
 set nextviewnum 1
 set curview 0
+set selectedview 0
 set viewfiles(0) {}
+set viewperm(0) 0
 
 set stopped 0
 set stuffsaved 0
@@ -4232,10 +4252,25 @@ if {[lindex $revtreeargs end] eq "--"} {
 if {$cmdline_files ne {}} {
     # create a view for the files/dirs specified on the command line
     set curview 1
+    set selectedview 1
     set nextviewnum 2
     set viewname(1) "Command line"
     set viewfiles(1) $cmdline_files
-    .bar.view add command -label $viewname(1) -command {showview 1}
+    set viewperm(1) 0
+    .bar.view add radiobutton -label $viewname(1) -command {showview 1} \
+	-variable selectedview -value 1
     .bar.view entryconf 2 -state normal
 }
+
+if {[info exists permviews]} {
+    foreach v $permviews {
+	set n $nextviewnum
+	incr nextviewnum
+	set viewname($n) [lindex $v 0]
+	set viewfiles($n) [lindex $v 1]
+	set viewperm($n) 1
+	.bar.view add radiobutton -label $viewname($n) \
+	    -command [list showview $n] -variable selectedview -value $n
+    }
+}
 getcommits