configurable truncation-delimiter w/ utf8 suggestion/special value

doc/tigrc.5.adoc

@@ -190,6 +190,12 @@ The following variables can be set:
 
 	What type of character graphics for line drawing.
 
+'truncation-delimiter' (mixed) [utf-8|<string>]::
+
+	A single character to draw where columns are truncated. The default is
+	"~".  The special value "utf-8" refers to the character "⋯"
+	("Midline Horizontal Ellipsis").
+
 'horizontal-scroll' (mixed)::
 
 	Interval to scroll horizontally in each step. Can be specified either

include/tig/options.h

@@ -76,6 +76,7 @@ typedef struct view_column *view_settings;
 	_(status_view,			view_settings,		VIEW_NO_FLAGS) \
 	_(tab_size,			int,			VIEW_NO_FLAGS) \
 	_(tree_view,			view_settings,		VIEW_NO_FLAGS) \
+	_(truncation_delimiter,		const char *,		VIEW_NO_FLAGS) \
 	_(vertical_split,		enum vertical_split,	VIEW_RESET_DISPLAY | VIEW_DIFF_LIKE) \
 	_(wrap_lines,			bool,			VIEW_NO_FLAGS) \
 	_(wrap_search,			bool,			VIEW_NO_FLAGS) \

src/draw.c

@@ -76,7 +76,7 @@ draw_chars(struct view *view, enum line_type type, const char *string, int lengt
 
 	if (trimmed && use_tilde) {
 		set_view_attr(view, LINE_DELIMITER);
-		waddch(view->win, '~');
+		waddstr(view->win, opt_truncation_delimiter ? opt_truncation_delimiter : "~");
 		col++;
 	}
 

src/options.c

@@ -643,6 +643,18 @@ parse_option(struct option_info *option, const char *prefix, const char *arg)
 				return ERROR_OUT_OF_MEMORY;
 		}
 
+		if (!strcmp(name, "truncation-delimiter")) {
+			if (!strcmp(alloc, "utf-8") || !strcmp(alloc, "utf8")) {
+				alloc = strdup("⋯");
+				if (!alloc)
+					return ERROR_OUT_OF_MEMORY;
+			} else if (utf8_width_of(alloc, -1, -1) != 1) {
+				alloc = strdup("~");
+				if (!alloc)
+					return ERROR_OUT_OF_MEMORY;
+			}
+		}
+
 		free((void *) *value);
 		*value = alloc;
 		return SUCCESS;

test/tigrc/truncation-test

@@ -0,0 +1,213 @@
+#!/bin/sh
+
+. libtest.sh
+. libgit.sh
+
+export LINES=16
+export COLUMNS=100
+
+in_work_dir create_repo_from_tgz "$base_dir/files/scala-js-benchmarks.tgz"
+
+test_case delimiter-default \
+	--tigrc='
+	set line-graphics = ascii
+	set grep-view = file-name:yes,width=5 line-number:yes,interval=1 text
+	' \
+	--script='
+	:g
+	source<Enter>
+	:refresh
+	' \
+	<<EOF
+LICE~   5| Redistribution and use in source and binary forms, with or without modification,
+LICE~   8|     * Redistributions of source code must retain the above copyright notice,
+READ~  27| time you save a source file, a compilation of the project is triggered.
+comm~ 633|  * Extract a plan for resatisfaction starting from the given source
+comm~ 649|  * Assume: sources are all satisfied.
+comm~ 651| Planner.prototype.makePlan = function (sources) {
+comm~ 654|   var todo = sources;
+comm~ 671|   var sources = new OrderedCollection();
+comm~ 676|       sources.add(c);
+comm~ 678|   return this.makePlan(sources);
+comm~   2| // Redistribution and use in source and binary forms, with or without
+comm~   6| //     * Redistributions of source code must retain the above copyright
+comm~  45| Object.extend = function(destination, source) {
+comm~  46|   for (var property in source) {
+[grep] LICENSE - line 1 of 24                                                                    58%
+EOF
+
+test_case delimiter-literal \
+	--tigrc='
+	set line-graphics = ascii
+	set grep-view = file-name:yes,width=5 line-number:yes,interval=1 text
+	set truncation-delimiter = _
+	' \
+	--script='
+	:g
+	source<Enter>
+	:refresh
+	' \
+	<<EOF
+LICE_   5| Redistribution and use in source and binary forms, with or without modification,
+LICE_   8|     * Redistributions of source code must retain the above copyright notice,
+READ_  27| time you save a source file, a compilation of the project is triggered.
+comm_ 633|  * Extract a plan for resatisfaction starting from the given source
+comm_ 649|  * Assume: sources are all satisfied.
+comm_ 651| Planner.prototype.makePlan = function (sources) {
+comm_ 654|   var todo = sources;
+comm_ 671|   var sources = new OrderedCollection();
+comm_ 676|       sources.add(c);
+comm_ 678|   return this.makePlan(sources);
+comm_   2| // Redistribution and use in source and binary forms, with or without
+comm_   6| //     * Redistributions of source code must retain the above copyright
+comm_  45| Object.extend = function(destination, source) {
+comm_  46|   for (var property in source) {
+[grep] LICENSE - line 1 of 24                                                                    58%
+EOF
+
+test_case delimiter-quoted-literal \
+	--tigrc='
+	set line-graphics = ascii
+	set grep-view = file-name:yes,width=5 line-number:yes,interval=1 text
+	set truncation-delimiter = "_"
+	' \
+	--script='
+	:g
+	source<Enter>
+	:refresh
+	' \
+	<<EOF
+LICE_   5| Redistribution and use in source and binary forms, with or without modification,
+LICE_   8|     * Redistributions of source code must retain the above copyright notice,
+READ_  27| time you save a source file, a compilation of the project is triggered.
+comm_ 633|  * Extract a plan for resatisfaction starting from the given source
+comm_ 649|  * Assume: sources are all satisfied.
+comm_ 651| Planner.prototype.makePlan = function (sources) {
+comm_ 654|   var todo = sources;
+comm_ 671|   var sources = new OrderedCollection();
+comm_ 676|       sources.add(c);
+comm_ 678|   return this.makePlan(sources);
+comm_   2| // Redistribution and use in source and binary forms, with or without
+comm_   6| //     * Redistributions of source code must retain the above copyright
+comm_  45| Object.extend = function(destination, source) {
+comm_  46|   for (var property in source) {
+[grep] LICENSE - line 1 of 24                                                                    58%
+EOF
+
+test_case delimiter-empty-fallback \
+	--tigrc='
+	set line-graphics = ascii
+	set grep-view = file-name:yes,width=5 line-number:yes,interval=1 text
+	set truncation-delimiter = ""
+	' \
+	--script='
+	:g
+	source<Enter>
+	:refresh
+	' \
+	<<EOF
+LICE~   5| Redistribution and use in source and binary forms, with or without modification,
+LICE~   8|     * Redistributions of source code must retain the above copyright notice,
+READ~  27| time you save a source file, a compilation of the project is triggered.
+comm~ 633|  * Extract a plan for resatisfaction starting from the given source
+comm~ 649|  * Assume: sources are all satisfied.
+comm~ 651| Planner.prototype.makePlan = function (sources) {
+comm~ 654|   var todo = sources;
+comm~ 671|   var sources = new OrderedCollection();
+comm~ 676|       sources.add(c);
+comm~ 678|   return this.makePlan(sources);
+comm~   2| // Redistribution and use in source and binary forms, with or without
+comm~   6| //     * Redistributions of source code must retain the above copyright
+comm~  45| Object.extend = function(destination, source) {
+comm~  46|   for (var property in source) {
+[grep] LICENSE - line 1 of 24                                                                    58%
+EOF
+
+test_case delimiter-too-long-fallback \
+	--tigrc='
+	set line-graphics = ascii
+	set grep-view = file-name:yes,width=5 line-number:yes,interval=1 text
+	set truncation-delimiter = multicharacter
+	' \
+	--script='
+	:g
+	source<Enter>
+	:refresh
+	' \
+	<<EOF
+LICE~   5| Redistribution and use in source and binary forms, with or without modification,
+LICE~   8|     * Redistributions of source code must retain the above copyright notice,
+READ~  27| time you save a source file, a compilation of the project is triggered.
+comm~ 633|  * Extract a plan for resatisfaction starting from the given source
+comm~ 649|  * Assume: sources are all satisfied.
+comm~ 651| Planner.prototype.makePlan = function (sources) {
+comm~ 654|   var todo = sources;
+comm~ 671|   var sources = new OrderedCollection();
+comm~ 676|       sources.add(c);
+comm~ 678|   return this.makePlan(sources);
+comm~   2| // Redistribution and use in source and binary forms, with or without
+comm~   6| //     * Redistributions of source code must retain the above copyright
+comm~  45| Object.extend = function(destination, source) {
+comm~  46|   for (var property in source) {
+[grep] LICENSE - line 1 of 24                                                                    58%
+EOF
+
+test_case delimiter-special-value \
+	--tigrc='
+	set line-graphics = ascii
+	set grep-view = file-name:yes,width=5 line-number:yes,interval=1 text
+	set truncation-delimiter = utf8
+	' \
+	--script='
+	:g
+	source<Enter>
+	:refresh
+	' \
+	<<EOF
+LICE⋯   5| Redistribution and use in source and binary forms, with or without modification,
+LICE⋯   8|     * Redistributions of source code must retain the above copyright notice,
+READ⋯  27| time you save a source file, a compilation of the project is triggered.
+comm⋯ 633|  * Extract a plan for resatisfaction starting from the given source
+comm⋯ 649|  * Assume: sources are all satisfied.
+comm⋯ 651| Planner.prototype.makePlan = function (sources) {
+comm⋯ 654|   var todo = sources;
+comm⋯ 671|   var sources = new OrderedCollection();
+comm⋯ 676|       sources.add(c);
+comm⋯ 678|   return this.makePlan(sources);
+comm⋯   2| // Redistribution and use in source and binary forms, with or without
+comm⋯   6| //     * Redistributions of source code must retain the above copyright
+comm⋯  45| Object.extend = function(destination, source) {
+comm⋯  46|   for (var property in source) {
+[grep] LICENSE - line 1 of 24                                                                    58%
+EOF
+
+test_case delimiter-utf8-literal \
+	--tigrc='
+	set line-graphics = ascii
+	set grep-view = file-name:yes,width=5 line-number:yes,interval=1 text
+	set truncation-delimiter = …
+	' \
+	--script='
+	:g
+	source<Enter>
+	:refresh
+	' \
+	<<EOF
+LICE…   5| Redistribution and use in source and binary forms, with or without modification,
+LICE…   8|     * Redistributions of source code must retain the above copyright notice,
+READ…  27| time you save a source file, a compilation of the project is triggered.
+comm… 633|  * Extract a plan for resatisfaction starting from the given source
+comm… 649|  * Assume: sources are all satisfied.
+comm… 651| Planner.prototype.makePlan = function (sources) {
+comm… 654|   var todo = sources;
+comm… 671|   var sources = new OrderedCollection();
+comm… 676|       sources.add(c);
+comm… 678|   return this.makePlan(sources);
+comm…   2| // Redistribution and use in source and binary forms, with or without
+comm…   6| //     * Redistributions of source code must retain the above copyright
+comm…  45| Object.extend = function(destination, source) {
+comm…  46|   for (var property in source) {
+[grep] LICENSE - line 1 of 24                                                                    58%
+EOF
+
+run_test_cases

tigrc

@@ -73,6 +73,7 @@ set show-changes		= yes		# Show changes commits in the main view?
 set wrap-lines			= no		# Wrap long lines in pager views?
 set tab-size			= 8		# Number of spaces to use when expanding tabs
 set line-graphics		= default	# Enum: ascii, default, utf-8
+set truncation-delimiter	= ~		# Character drawn for truncations, or "utf-8"
 
 # Format reference names based on type.
 #  - head		: The current HEAD.