Merge branch 'master' of git://ozlabs.org/~paulus/gitk

* 'master' of git://ozlabs.org/~paulus/gitk:
  gitk: Update .po files
  gitk: l10n: Add Catalan translation
  gitk: Fix typo in Russian translation
  gitk: Remove tcl-format flag from a message that shouldn't have it
  gitk: Pass --invert-grep option down to "git log"
  gitk: Synchronize config file writes
  gitk: Report errors in saving config file
  gitk: Only write changed configuration variables
  gitk: Enable mouse horizontal scrolling in diff pane
  gitk: Default wrcomcmd to use --pretty=email

Author: gitster

gitk-git/gitk

@@ -2516,6 +2516,13 @@ proc makewindow {} {
     } else {
 	bindall <ButtonRelease-4> "allcanvs yview scroll -5 units"
 	bindall <ButtonRelease-5> "allcanvs yview scroll 5 units"
+	bind $ctext <Button> {
+	    if {"%b" eq 6} {
+		$ctext xview scroll -5 units
+	    } elseif {"%b" eq 7} {
+		$ctext xview scroll 5 units
+	    }
+	}
         if {[tk windowingsystem] eq "aqua"} {
             bindall <MouseWheel> {
                 set delta [expr {- (%D)}]
@@ -2776,33 +2783,87 @@ proc doprogupdate {} {
     }
 }
 
+proc config_check_tmp_exists {tries_left} {
+    global config_file_tmp
+
+    if {[file exists $config_file_tmp]} {
+	incr tries_left -1
+	if {$tries_left > 0} {
+	    after 100 [list config_check_tmp_exists $tries_left]
+	} else {
+	    error_popup "There appears to be a stale $config_file_tmp\
+ file, which will prevent gitk from saving its configuration on exit.\
+ Please remove it if it is not being used by any existing gitk process."
+	}
+    }
+}
+
+proc config_init_trace {name} {
+    global config_variable_changed config_variable_original
+
+    upvar #0 $name var
+    set config_variable_changed($name) 0
+    set config_variable_original($name) $var
+}
+
+proc config_variable_change_cb {name name2 op} {
+    global config_variable_changed config_variable_original
+
+    upvar #0 $name var
+    if {$op eq "write" &&
+	(![info exists config_variable_original($name)] ||
+	 $config_variable_original($name) ne $var)} {
+	set config_variable_changed($name) 1
+    }
+}
+
 proc savestuff {w} {
-    global viewname viewfiles viewargs viewargscmd viewperm nextviewnum
-    global use_ttk
     global stuffsaved
     global config_file config_file_tmp
-    global config_variables
+    global config_variables config_variable_changed
+    global viewchanged
+
+    upvar #0 viewname current_viewname
+    upvar #0 viewfiles current_viewfiles
+    upvar #0 viewargs current_viewargs
+    upvar #0 viewargscmd current_viewargscmd
+    upvar #0 viewperm current_viewperm
+    upvar #0 nextviewnum current_nextviewnum
+    upvar #0 use_ttk current_use_ttk
 
     if {$stuffsaved} return
     if {![winfo viewable .]} return
-    catch {
-	if {[file exists $config_file_tmp]} {
-	    file delete -force $config_file_tmp
+    set remove_tmp 0
+    if {[catch {
+	set try_count 0
+	while {[catch {set f [open $config_file_tmp {WRONLY CREAT EXCL}]}]} {
+	    if {[incr try_count] > 50} {
+		error "Unable to write config file: $config_file_tmp exists"
+	    }
+	    after 100
 	}
-	set f [open $config_file_tmp w]
+	set remove_tmp 1
 	if {$::tcl_platform(platform) eq {windows}} {
 	    file attributes $config_file_tmp -hidden true
 	}
+	if {[file exists $config_file]} {
+	    source $config_file
+	}
 	foreach var_name $config_variables {
 	    upvar #0 $var_name var
-	    puts $f [list set $var_name $var]
+	    upvar 0 $var_name old_var
+	    if {!$config_variable_changed($var_name) && [info exists old_var]} {
+		puts $f [list set $var_name $old_var]
+	    } else {
+		puts $f [list set $var_name $var]
+	    }
 	}
 
 	puts $f "set geometry(main) [wm geometry .]"
 	puts $f "set geometry(state) [wm state .]"
 	puts $f "set geometry(topwidth) [winfo width .tf]"
 	puts $f "set geometry(topheight) [winfo height .tf]"
-	if {$use_ttk} {
+	if {$current_use_ttk} {
 	    puts $f "set geometry(pwsash0) \"[.tf.histframe.pwclist sashpos 0] 1\""
 	    puts $f "set geometry(pwsash1) \"[.tf.histframe.pwclist sashpos 1] 1\""
 	} else {
@@ -2812,15 +2873,43 @@ proc savestuff {w} {
 	puts $f "set geometry(botwidth) [winfo width .bleft]"
 	puts $f "set geometry(botheight) [winfo height .bleft]"
 
+	array set view_save {}
+	array set views {}
+	if {![info exists permviews]} { set permviews {} }
+	foreach view $permviews {
+	    set view_save([lindex $view 0]) 1
+	    set views([lindex $view 0]) $view
+	}
 	puts -nonewline $f "set permviews {"
-	for {set v 0} {$v < $nextviewnum} {incr v} {
-	    if {$viewperm($v)} {
-		puts $f "{[list $viewname($v) $viewfiles($v) $viewargs($v) $viewargscmd($v)]}"
+	for {set v 1} {$v < $current_nextviewnum} {incr v} {
+	    if {$viewchanged($v)} {
+		if {$current_viewperm($v)} {
+		    set views($current_viewname($v)) [list $current_viewname($v) $current_viewfiles($v) $current_viewargs($v) $current_viewargscmd($v)]
+		} else {
+		    set view_save($current_viewname($v)) 0
+		}
+	    }
+	}
+	# write old and updated view to their places and append remaining to the end
+	foreach view $permviews {
+	    set view_name [lindex $view 0]
+	    if {$view_save($view_name)} {
+		puts $f "{$views($view_name)}"
 	    }
+	    unset views($view_name)
+	}
+	foreach view_name [array names views] {
+	    puts $f "{$views($view_name)}"
 	}
 	puts $f "}"
 	close $f
 	file rename -force $config_file_tmp $config_file
+	set remove_tmp 0
+    } err]} {
+        puts "Error saving config: $err"
+    }
+    if {$remove_tmp} {
+	file delete -force $config_file_tmp
     }
     set stuffsaved 1
 }
@@ -3977,6 +4066,7 @@ set known_view_options {
     {committer t15  .  "--committer=*"  {mc "Committer:"}}
     {loginfo   t15  .. "--grep=*"       {mc "Commit Message:"}}
     {allmatch  b    .. "--all-match"    {mc "Matches all Commit Info criteria"}}
+    {igrep     b    .. "--invert-grep"  {mc "Matches none Commit Info criteria"}}
     {changes_l l    +  {}               {mc "Changes to Files:"}}
     {pickaxe_s r0   .  {}               {mc "Fixed String"}}
     {pickaxe_t r1   .  "--pickaxe-regex"  {mc "Regular Expression"}}
@@ -4238,7 +4328,7 @@ proc allviewmenus {n op args} {
 
 proc newviewok {top n {apply 0}} {
     global nextviewnum newviewperm newviewname newishighlight
-    global viewname viewfiles viewperm selectedview curview
+    global viewname viewfiles viewperm viewchanged selectedview curview
     global viewargs viewargscmd newviewopts viewhlmenu
 
     if {[catch {
@@ -4259,6 +4349,7 @@ proc newviewok {top n {apply 0}} {
 	incr nextviewnum
 	set viewname($n) $newviewname($n)
 	set viewperm($n) $newviewopts($n,perm)
+	set viewchanged($n) 1
 	set viewfiles($n) $files
 	set viewargs($n) $newargs
 	set viewargscmd($n) $newviewopts($n,cmd)
@@ -4271,6 +4362,7 @@ proc newviewok {top n {apply 0}} {
     } else {
 	# editing an existing view
 	set viewperm($n) $newviewopts($n,perm)
+	set viewchanged($n) 1
 	if {$newviewname($n) ne $viewname($n)} {
 	    set viewname($n) $newviewname($n)
 	    doviewmenu .bar.view 5 [list showview $n] \
@@ -4293,7 +4385,7 @@ proc newviewok {top n {apply 0}} {
 }
 
 proc delview {} {
-    global curview viewperm hlview selectedhlview
+    global curview viewperm hlview selectedhlview viewchanged
 
     if {$curview == 0} return
     if {[info exists hlview] && $hlview == $curview} {
@@ -4302,6 +4394,7 @@ proc delview {} {
     }
     allviewmenus $curview delete
     set viewperm($curview) 0
+    set viewchanged($curview) 1
     showview 0
 }
 
@@ -11237,6 +11330,7 @@ proc prefspage_general {notebook} {
     ${NS}::label $page.maxwidthl -text [mc "Maximum graph width (lines)"]
     spinbox $page.maxwidth -from 0 -to 100 -width 4 -textvariable maxwidth
     grid $page.spacer $page.maxwidthl $page.maxwidth -sticky w
+                                         #xgettext:no-tcl-format
     ${NS}::label $page.maxpctl -text [mc "Maximum graph width (% of pane)"]
     spinbox $page.maxpct -from 1 -to 100 -width 4 -textvariable maxgraphpct
     grid x $page.maxpctl $page.maxpct -sticky w
@@ -11936,7 +12030,7 @@ if { [info exists ::env(GIT_TRACE)] } {
 }
 
 # defaults...
-set wrcomcmd "git diff-tree --stdin -p --pretty"
+set wrcomcmd "git diff-tree --stdin -p --pretty=email"
 
 set gitencoding {}
 catch {
@@ -12109,6 +12203,7 @@ catch {
     }
     source $config_file
 }
+config_check_tmp_exists 50
 
 set config_variables {
     mainfont textfont uifont tabstop findmergefiles maxgraphpct maxwidth
@@ -12122,6 +12217,10 @@ set config_variables {
     linehoveroutlinecolor mainheadcirclecolor workingfilescirclecolor
     indexcirclecolor circlecolors linkfgcolor circleoutlinecolor
 }
+foreach var $config_variables {
+    config_init_trace $var
+    trace add variable $var write config_variable_change_cb
+}
 
 parsefont mainfont $mainfont
 eval font create mainfont [fontflags mainfont]
@@ -12249,6 +12348,7 @@ set highlight_related [mc "None"]
 set highlight_files {}
 set viewfiles(0) {}
 set viewperm(0) 0
+set viewchanged(0) 0
 set viewargs(0) {}
 set viewargscmd(0) {}
 
@@ -12307,6 +12407,7 @@ if {$cmdline_files ne {} || $revtreeargs ne {} || $revtreeargscmd ne {}} {
     set viewargs(1) $revtreeargs
     set viewargscmd(1) $revtreeargscmd
     set viewperm(1) 0
+    set viewchanged(1) 0
     set vdatemode(1) 0
     addviewmenu 1
     .bar.view entryconf [mca "Edit view..."] -state normal
@@ -12322,6 +12423,7 @@ if {[info exists permviews]} {
 	set viewargs($n) [lindex $v 2]
 	set viewargscmd($n) [lindex $v 3]
 	set viewperm($n) 1
+	set viewchanged($n) 0
 	addviewmenu $n
     }
 }