From 7ef503bf3c0fd3f5f30f907fa724eb9c5398b945 Mon Sep 17 00:00:00 2001
From: Bert Wesarg <bert.wesarg@googlemail.com>
Date: Wed, 25 May 2011 18:59:34 +0200
Subject: [PATCH] git-gui: support for diff3 conflict style

This adds highlight support for the diff3 conflict style.

The common pre-image will be reversed to --, because it has been removed
and either replaced with our or their side.

Signed-off-by: Bert Wesarg <bert.wesarg@googlemail.com>
---
 git-gui.sh   |  3 +++
 lib/diff.tcl | 22 ++++++++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/git-gui.sh b/git-gui.sh
index c2859b9..1d220a4 100755
--- a/git-gui.sh
+++ b/git-gui.sh
@@ -3529,6 +3529,9 @@ $ui_diff tag conf d_s- \
 $ui_diff tag conf d< \
 	-foreground orange \
 	-font font_diffbold
+$ui_diff tag conf d| \
+	-foreground orange \
+	-font font_diffbold
 $ui_diff tag conf d= \
 	-foreground orange \
 	-font font_diffbold
diff --git a/lib/diff.tcl b/lib/diff.tcl
index 8189542..b140c87 100644
--- a/lib/diff.tcl
+++ b/lib/diff.tcl
@@ -327,6 +327,7 @@ proc start_show_diff {cont_info {add_opts {}}} {
 	}
 
 	set ::current_diff_inheader 1
+	set ::conflict_state {CONTEXT}
 	fconfigure $fd \
 		-blocking 0 \
 		-encoding [get_path_encoding $path] \
@@ -427,10 +428,28 @@ proc read_diff {fd conflict_size cont_info} {
 			{++} {
 				set regexp [string map [list %conflict_size $conflict_size]\
 								{^\+\+([<>=]){%conflict_size}(?: |$)}]
+				set regexp_pre_image [string map [list %conflict_size $conflict_size]\
+								{^\+\+\|{%conflict_size}(?: |$)}]
 				if {[regexp $regexp $line _g op]} {
 					set is_conflict_diff 1
 					set line [string replace $line 0 1 {  }]
+					set markup {}
 					set tags d$op
+					switch -exact -- $op {
+					< { set ::conflict_state {OURS} }
+					= { set ::conflict_state {THEIRS} }
+					> { set ::conflict_state {CONTEXT} }
+					}
+				} elseif {[regexp $regexp_pre_image $line]} {
+					set is_conflict_diff 1
+					set line [string replace $line 0 1 {  }]
+					set markup {}
+					set tags d|
+					set ::conflict_state {BASE}
+				} elseif {$::conflict_state eq {BASE}} {
+					set line [string replace $line 0 1 {--}]
+					set markup {}
+					set tags d_--
 				} else {
 					set tags d_++
 				}
@@ -482,6 +501,9 @@ proc read_diff {fd conflict_size cont_info} {
 			}
 		}
 		set mark [$ui_diff index "end - 1 line linestart"]
+		if {[llength $markup] > 0} {
+			set tags {}
+		}
 		$ui_diff insert end $line $tags
 		if {[string index $line end] eq "\r"} {
 			$ui_diff tag add d_cr {end - 2c}
-- 
2.11.4.GIT