git-gui: Enable jumping to a specific line number in blame view.

This patch adds a goto control similar to the search control currently
available. The goto control permits the user to specify a line number to
jump to.
When in blame, Control-G is bound to display this control.

Signed-off-by: David Fries <David@Fries.net>
Signed-off-by: Pat Thoyts <patthoyts@users.sourceforge.net>

1 files changed, 64 insertions, 0 deletions

diff --git a/lib/line.tcl b/lib/line.tcl
new file mode 100644
index 0000000000..4913bdd9a8
--- /dev/null
+++ b/lib/line.tcl
@@ -0,0 +1,64 @@
+# goto line number
+# based on code from gitk, Copyright (C) Paul Mackerras
+
+class linebar {
+
+field w
+field ctext
+
+field linenum   {}
+
+constructor new {i_w i_text args} {
+	global use_ttk NS
+	set w      $i_w
+	set ctext  $i_text
+
+	${NS}::frame  $w
+	${NS}::label  $w.l       -text [mc "Goto Line:"]
+	entry  $w.ent -textvariable ${__this}::linenum -background lightgreen
+	${NS}::button $w.bn      -text [mc Go] -command [cb _incrgoto]
+
+	pack   $w.l   -side left
+	pack   $w.bn  -side right
+	pack   $w.ent -side left -expand 1 -fill x
+
+	eval grid conf $w -sticky we $args
+	grid remove $w
+
+	bind $w.ent <Return> [cb _incrgoto]
+	bind $w.ent <Escape> [list linebar::hide $this]
+
+	bind $w <Destroy> [list delete_this $this]
+	return $this
+}
+
+method show {} {
+	if {![visible $this]} {
+		grid $w
+	}
+	focus -force $w.ent
+}
+
+method hide {} {
+	if {[visible $this]} {
+		focus $ctext
+		grid remove $w
+	}
+}
+
+method visible {} {
+	return [winfo ismapped $w]
+}
+
+method editor {} {
+	return $w.ent
+}
+
+method _incrgoto {} {
+	if {$linenum ne {}} {
+		$ctext see $linenum.0
+		hide $this
+	}
+}
+
+}