# [PATCH v2 1/2] git-gui: use existing interface to query a path's attribute

2 messages from 2019-09-30 to 2019-09-30. Participants: Bert Wesarg.
Thread: https://gitlist.dev/t/51942

## Bert Wesarg, 2019-09-30 12:20

Subject: [PATCH v2 1/2] git-gui: use existing interface to query a path's attribute
Message-ID: <97013a71289857767100d6a4adcb39ca99b2b21b.1569845908.git.bert.wesarg@googlemail.com>
URL: https://gitlist.dev/e/97013a71289857767100d6a4adcb39ca99b2b21b.1569845908.git.bert.wesarg%40googlemail.com

```
Replace the hand-coded call to git check-attr with the already provided one.

Signed-off-by: Bert Wesarg <bert.wesarg@googlemail.com>
---
 lib/diff.tcl | 15 +--------------
 1 file changed, 1 insertion(+), 14 deletions(-)

diff --git a/lib/diff.tcl b/lib/diff.tcl
index 958a0fa..0fd4600 100644
--- a/lib/diff.tcl
+++ b/lib/diff.tcl
@@ -270,19 +270,6 @@ proc show_other_diff {path w m cont_info} {
 	}
 }
 
-proc get_conflict_marker_size {path} {
-	set size 7
-	catch {
-		set fd_rc [eval [list git_read check-attr "conflict-marker-size" -- $path]]
-		set ret [gets $fd_rc line]
-		close $fd_rc
-		if {$ret > 0} {
-			regexp {.*: conflict-marker-size: (\d+)$} $line line size
-		}
-	}
-	return $size
-}
-
 proc start_show_diff {cont_info {add_opts {}}} {
 	global file_states file_lists
 	global is_3way_diff is_submodule_diff diff_active repo_config
@@ -298,7 +285,7 @@ proc start_show_diff {cont_info {add_opts {}}} {
 	set is_submodule_diff 0
 	set diff_active 1
 	set current_diff_header {}
-	set conflict_size [get_conflict_marker_size $path]
+	set conflict_size [gitattr $path conflict-marker-size 7]
 
 	set cmd [list]
 	if {$w eq $ui_index} {
-- 
2.23.0.11.g242cf7f110


```

## Bert Wesarg, 2019-09-30 12:20

Subject: [PATCH v2 2/2] git-gui: support for diff3 conflict style
Message-ID: <14754a59ecf15194dccc659072e2bc180280d097.1569845908.git.bert.wesarg@googlemail.com>
URL: https://gitlist.dev/e/14754a59ecf15194dccc659072e2bc180280d097.1569845908.git.bert.wesarg%40googlemail.com
In-Reply-To: <97013a71289857767100d6a4adcb39ca99b2b21b.1569845908.git.bert.wesarg@googlemail.com>

```
This adds highlight support for the diff3 conflict style.

The common pre-image will be reversed to --, because it has been removed
and replaced with ours or theirs side respectively.

Signed-off-by: Bert Wesarg <bert.wesarg@googlemail.com>
---
 git-gui.sh   |  3 +++
 lib/diff.tcl | 17 ++++++++++++++++-
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/git-gui.sh b/git-gui.sh
index fd476b6..6d80f82 100755
--- a/git-gui.sh
+++ b/git-gui.sh
@@ -3581,6 +3581,9 @@ $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 0fd4600..6459cfb 100644
--- a/lib/diff.tcl
+++ b/lib/diff.tcl
@@ -347,6 +347,10 @@ proc start_show_diff {cont_info {add_opts {}}} {
 	}
 
 	set ::current_diff_inheader 1
+	# detect pre-image lines of the diff3 conflict-style, they are just '++'
+	# lines which is not bijective, thus we need to maintain a state across
+	# lines
+	set ::conflict_in_pre_image 0
 	fconfigure $fd \
 		-blocking 0 \
 		-encoding [get_path_encoding $path] \
@@ -449,11 +453,22 @@ proc read_diff {fd conflict_size cont_info} {
 			{--} {set tags d_--}
 			{++} {
 				set regexp [string map [list %conflict_size $conflict_size]\
-								{^\+\+([<>=]){%conflict_size}(?: |$)}]
+								{^\+\+([<>=|]){%conflict_size}(?: |$)}]
 				if {[regexp $regexp $line _g op]} {
 					set is_conflict_diff 1
 					set line [string replace $line 0 1 {  }]
 					set tags d$op
+					# the ||| conflict-marker marks the start of the pre-image,
+					# all those lines are also prefixed with '++', thus we need
+					# to maintain this state
+					set ::conflict_in_pre_image [expr {$op eq {|}}
+				} elseif {$::conflict_in_pre_image} {
+					# this is a pre-image line, it is the one which both sides
+					# are based on. As it has also the '++' line start, it is
+					# normally shown as 'added', invert this to '--' to make
+					# it a 'removed' line
+					set line [string replace $line 0 1 {--}]
+					set tags d_--
 				} else {
 					set tags d_++
 				}
-- 
2.23.0.11.g242cf7f110


```