core: add reverse of string for screen in evaluation of expressions with "revscr:"

2019-10-12 20:14:36 +02:00 · 2019-10-12 20:14:36 +02:00 · 8fc8f728d4
commit 8fc8f728d4
parent 9535f4a70b
31 changed files with 323 additions and 115 deletions
--- a/ChangeLog.adoc
+++ b/ChangeLog.adoc
@ -21,6 +21,7 @@ https://weechat.org/files/releasenotes/ReleaseNotes-devel.html[release notes]
 New features::

  * core: add file weechat.desktop
+  * core: add reverse of string for screen in evaluation of expressions with "revscr:"
  * core: add length of string (number of chars and on screen) in evaluation of expressions with "length:xxx" and "lengthscr:xxx"
  * core: add calculation of expression in evaluation of expressions with "calc:xxx" (issue #997)
  * core: add optional default path (evaluated) in completion "filename"
--- a/doc/de/autogen/user/weechat_commands.adoc
+++ b/doc/de/autogen/user/weechat_commands.adoc
@ -266,68 +266,68 @@ infolists: zeigt Information über die Infolists an
 /eval  [-n|-s] <expression>
       [-n] -c <expression1> <operator> <expression2>

-        -n: gibt das Ergebnis aus, ohne dass dieses in den Buffer gesendet wird (debug Modus)
-        -s: teilt Ausdrücke, bevor sie evaluiert werden (mehrere Befehle können durch Semikolon getrennt werden)
-        -c: Auswertung als Bedingung: nutzt Operatoren und runde Klammern, Rückgabewert als Boolean-Wert ("0" oder "1")
-expression: Ausdruck welcher verarbeitet werden soll. Variablen im Format ${variable} werden ersetzt (siehe unten); mehrere Befehle werden durch ein Semikolon voneinander getrennt
-  operator: ein logischer oder vergleichender Operand:
-            - logische Operanden:
-                &&  boolean "und"
-                ||  boolean "oder"
-            - vergleichende Operanden:
-                ==  gleich
-                !=  ungleich
-                <=  kleiner oder gleich
-                <   kleiner
-                >=  größer oder gleich
-                >   größer
-                =~  stimmt mit regulärem POSIX Ausdruck überein
-                !~  stimmt NICHT mit regulärem POSIX Ausdruck überein
-                =*  stimmt mit Maske überein (Platzhalter "*" ist erlaubt)
-                !*  stimmt mit Maske NICHT überein (Platzhalter "*" ist erlaubt)
+        -n: display result without sending it to buffer (debug mode)
+        -s: split expression before evaluating it (many commands can be separated by semicolons)
+        -c: evaluate as condition: use operators and parentheses, return a boolean value ("0" or "1")
+expression: expression to evaluate, variables with format ${variable} are replaced (see below); many commands can be separated by semicolons
+  operator: a logical or comparison operator:
+            - logical operators:
+                &&  boolean "and"
+                ||  boolean "or"
+            - comparison operators:
+                ==  equal
+                !=  not equal
+                <=  less or equal
+                <   less
+                >=  greater or equal
+                >   greater
+                =~  is matching POSIX extended regex
+                !~  is NOT matching POSIX extended regex
+                =*  is matching mask (wildcard "*" is allowed)
+                !*  is NOT matching mask (wildcard "*" is allowed)

-Ein Ausdruck gilt als "wahr" sofern das Ergebnis weder NULL, nicht leer und von "0" abweichend ist.
-Für einen Vergleich werden Fließkommazahlen genutzt, insofern es sich bei beiden Ausdrücken um gültige Zahlen handelt, folgende Formate werden unterstützt:
-  - Integer (Beispiele: 5, -7)
-  - Fließkommazahl (Beispiele: 5.2, -7.5, 2.83e-2)
-  - hexadezimale Zahl (Beispiele: 0xA3, -0xA3)
-Um einen Vergleich zwischen zwei Zeichenketten zu erzwingen, müssen die Ausdrücke in Anführungszeichen gesetzt werden, zum Beispiel:
+An expression is considered as "true" if it is not NULL, not empty, and different from "0".
+The comparison is made using floating point numbers if the two expressions are valid numbers, with one of the following formats:
+  - integer (examples: 5, -7)
+  - floating point number (examples: 5.2, -7.5, 2.83e-2)
+  - hexadecimal number (examples: 0xA3, -0xA3)
+To force a string comparison, you can add double quotes around each expression, for example:
  50 > 100      ==> 0
  "50" > "100"  ==> 1

-Einige Variablen werden im Ausdruck mittels der Formatierung ${variable} ersetzt. Mögliche Variablen sind, nach Reihenfolge ihrer Priorität:
-  1. eine evaluierte Teilzeichenkette (Format: "eval:xxx")
-  2. eine Zeichenkette mit Escapesequenzen (Format: "esc:xxx" oder "\xxx")
-  3. Zeichen, die in einer Zeichenkette nicht dargestellt werden sollen (Format: "hide:Zeichen,Zeichenkette")
-  4. eine Zeichenkette mit einer maximalen Anzahl an Zeichen (Format: "cut:+Max,Suffix,Zeichenkette")
-     oder maximale Anzahl an Zeichen die auf dem Bildschirm angezeigt werden sollen (Format: "cutscr:Max,Suffix,Zeichenkette oder "cutscr:+Max,Suffix,Zeichenkette")
-  5. eine Zeichenkette umkehren (Format: "rev:xxx")
-  6. eine Zeichenkette wiederholen (Format: "repeat:Anzahl,Zeichenkette")
-  7. Länge einer Zeichenkette (Format: "length:xxx" oder "lengthscr:xxx")
-  8. eine Farbe (Format: "color:xxx", siehe "Anleitung für API Erweiterung", Funktion "color")
-  9. ein Modifizierer (Format: "info:Name,Argumente", Argumente sind optional)
-  10. eine Info (Format: "Info:Name,Argumente", Argumente sind optional)
-  11. aktuelles Datum/Uhrzeit (Format: "date" oder "date:format")
-  12. eine Umgebungsvariable (Format: "env:XXX")
-  13. ein Dreifachoperand (Format: "if:Bedingung?Wert_falls_wahr:Wert_falls_unwahr")
-  14. Ergebnis eines Ausdrucks mit Klammern und Operatoren + - * / // % ** (Format: "calc:xxx")
-  15. eine Option (Format: "file.section.option")
-  16. eine lokale Variable eines Buffers
-  17. ein(e) hdata - Name/Variable (der Wert wird automatisch in eine Zeichenkette konvertiert), standardmäßig wird für "window" und "buffer" das aktuelle Fenster/Buffer verwendet.
-Das Format für hdata kann wie folgt aufgebaut sein:
-  hdata.var1.var2...: startet mit hdata (der Pointer muss bekannt sein) und fragt eine Variable nach der anderen ab (weitere hdata können folgen)
-  hdata[list].var1.var2...: startet hdata mittels einer Liste, zum Beispiel:
-    ${buffer[gui_buffers].full_name}: der vollständige Name des ersten Buffers, in der verknüpften Liste aller Buffer
-    ${plugin[weechat_plugins].name}: Name der ersten Erweiterung, in der verknüpften Liste aller Erweiterungen
-  hdata[pointer].var1.var2...: startet hdata mittels einem Pointer, zum Beispiel:
-    ${buffer[0x1234abcd].full_name}: vollständiger Name eines Buffers und des dazugehörigen Pointers (kann in triggern benutzt werden)
-Die vorhandenen Namen für hdata und Variablen sind in der "Anleitung für API Erweiterung", Bereich "weechat_hdata_get". beschrieben
+Some variables are replaced in expression, using the format ${variable}, variable can be, by order of priority:
+  1. an evaluated sub-string (format: "eval:xxx")
+  2. a string with escaped chars (format: "esc:xxx" or "\xxx")
+  3. a string with chars to hide (format: "hide:char,string")
+  4. a string with max chars (format: "cut:max,suffix,string" or "cut:+max,suffix,string")
+     or max chars displayed on screen (format: "cutscr:max,suffix,string" or "cutscr:+max,suffix,string")
+  5. a reversed string (format: "rev:xxx" or "revscr:xxx")
+  6. a repeated string (format: "repeat:count,string")
+  7. length of a string (format: "length:xxx" or "lengthscr:xxx")
+  8. a color (format: "color:xxx", see "Plugin API reference", function "color")
+  9. a modifier (format: "modifier:name,data,string")
+  10. an info (format: "info:name,arguments", arguments are optional)
+  11. current date/time (format: "date" or "date:format")
+  12. an environment variable (format: "env:XXX")
+  13. a ternary operator (format: "if:condition?value_if_true:value_if_false")
+  14. result of an expression with parentheses and operators + - * / // % ** (format: "calc:xxx")
+  15. an option (format: "file.section.option")
+  16. a local variable in buffer
+  17. a hdata name/variable (the value is automatically converted to string), by default "window" and "buffer" point to current window/buffer.
+Format for hdata can be one of following:
+  hdata.var1.var2...: start with a hdata (pointer must be known), and ask variables one after one (other hdata can be followed)
+  hdata[list].var1.var2...: start with a hdata using a list, for example:
+    ${buffer[gui_buffers].full_name}: full name of first buffer in linked list of buffers
+    ${plugin[weechat_plugins].name}: name of first plugin in linked list of plugins
+  hdata[pointer].var1.var2...: start with a hdata using a pointer, for example:
+    ${buffer[0x1234abcd].full_name}: full name of the buffer with this pointer (can be used in triggers)
+For name of hdata and variables, please look at "Plugin API reference", function "weechat_hdata_get".

-Beispiele (einfache Zeichenketten):
+Examples (simple strings):
  /eval -n ${info:version}                       ==> 0.4.3
  /eval -n ${env:HOME}                           ==> /home/user
  /eval -n ${weechat.look.scroll_amount}         ==> 3
-  /eval -n ${sec.data.freenode_password}         ==> geheim
+  /eval -n ${sec.data.freenode_password}         ==> secret
  /eval -n ${window}                             ==> 0x2549aa0
  /eval -n ${window.buffer}                      ==> 0x2549320
  /eval -n ${window.buffer.full_name}            ==> core.weechat
@ -343,16 +343,16 @@ Beispiele (einfache Zeichenketten):
  /eval -n ${length:test}                        ==> 4
  /eval -n ${calc:(5+2)*3}                       ==> 21

-Beispiele (Bedingungen):
-  /eval -n -c ${window.buffer.number} > 2  ==> 0
-  /eval -n -c ${window.win_width} > 100    ==> 1
-  /eval -n -c (8 > 12) || (5 > 2)          ==> 1
-  /eval -n -c (8 > 12) && (5 > 2)          ==> 0
-  /eval -n -c abcd =~ ^ABC                 ==> 1
-  /eval -n -c abcd =~ (?-i)^ABC            ==> 0
-  /eval -n -c abcd =~ (?-i)^abc            ==> 1
-  /eval -n -c abcd !~ abc                  ==> 0
-  /eval -n -c abcd =* a*d                  ==> 1
+Examples (conditions):
+  /eval -n -c ${window.buffer.number} > 2 ==> 0
+  /eval -n -c ${window.win_width} > 100   ==> 1
+  /eval -n -c (8 > 12) || (5 > 2)         ==> 1
+  /eval -n -c (8 > 12) && (5 > 2)         ==> 0
+  /eval -n -c abcd =~ ^ABC                ==> 1
+  /eval -n -c abcd =~ (?-i)^ABC           ==> 0
+  /eval -n -c abcd =~ (?-i)^abc           ==> 1
+  /eval -n -c abcd !~ abc                 ==> 0
+  /eval -n -c abcd =* a*d                 ==> 1
 ----

 [[command_weechat_filter]]
--- a/doc/en/autogen/user/weechat_commands.adoc
+++ b/doc/en/autogen/user/weechat_commands.adoc
@ -301,7 +301,7 @@ Some variables are replaced in expression, using the format ${variable}, variabl
  3. a string with chars to hide (format: "hide:char,string")
  4. a string with max chars (format: "cut:max,suffix,string" or "cut:+max,suffix,string")
     or max chars displayed on screen (format: "cutscr:max,suffix,string" or "cutscr:+max,suffix,string")
-  5. a reversed string (format: "rev:xxx")
+  5. a reversed string (format: "rev:xxx" or "revscr:xxx")
  6. a repeated string (format: "repeat:count,string")
  7. length of a string (format: "length:xxx" or "lengthscr:xxx")
  8. a color (format: "color:xxx", see "Plugin API reference", function "color")
--- a/doc/en/weechat_plugin_api.en.adoc
+++ b/doc/en/weechat_plugin_api.en.adoc
@ -2464,9 +2464,20 @@ expanded to last):

 | `+${rev:xxx}+` +
  _(WeeChat ≥ 2.2)_ |
-  Reversed string. |
-  `+${rev:Hello, world!}+` |
-  `+!dlrow ,olleH+`
+  Reversed string (color codes are reversed, so the string should not contain
+  color codes). |
+  `+${rev:Hello, world!}+` +
+  `+${rev:Hello, ${color:red}world!}+` |
+  `+!dlrow ,olleH+` +
+  `+!dlrow30F ,olleH+` (no color, the color code is reversed)
+
+| `+${revscr:xxx}+` +
+  _(WeeChat ≥ 2.7)_ |
+  Reversed string for screen, color codes are not reversed. |
+  `+${revscr:Hello, world!}+` +
+  `+${revscr:Hello, ${color:red}world!}+` |
+  `+!dlrow ,olleH+` +
+  `+!dlrow ,olleH+` (`pass:[ ,olleH]` in red)

 | `+${repeat:count,string}+` +
  _(WeeChat ≥ 2.3)_ |
--- a/doc/fr/autogen/user/weechat_commands.adoc
+++ b/doc/fr/autogen/user/weechat_commands.adoc
@ -301,7 +301,7 @@ Des variables sont remplacées dans l'expression, en utilisant le format ${varia
  3. une chaîne avec des caractères à cacher (format : "hide:caractère,chaîne")
  4. une chaîne avec un maximum de caractères (format : "cut:max,suffixe,chaîne" ou "cut:+max,suffixe,chaîne")
     ou un maximum de caractères affichés à l'écran (format : "cutscr:max,suffixe,chaîne" ou "cutscr:+max,suffixe,chaîne")
-  5. une chaîne inversée (format : "rev:xxx")
+  5. une chaîne inversée (format : "rev:xxx" ou "revscr:xxx")
  6. une chaîne répétée (format : "repeat:nombre,chaîne")
  7. longueur d'une chaîne (format : "length:xxx" ou "lengthscr:xxx")
  8. une couleur (format : "color:xxx", voir la "Référence API extension", fonction "color")
--- a/doc/fr/weechat_plugin_api.fr.adoc
+++ b/doc/fr/weechat_plugin_api.fr.adoc
@ -2511,9 +2511,20 @@ première étendue à la dernière) :

 | `+${rev:xxx}+` +
  _(WeeChat ≥ 2.2)_ |
-  Chaîne inversée. |
-  `+${rev:Bonjour !}+` |
-  `+! ruojnoB+`
+  Chaîne inversée (les codes couleurs sont inversés, donc la chaîne ne devrait
+  pas contenir de codes couleurs). |
+  `+${rev:Bonjour, le monde !}+` +
+  `+${rev:Bonjour, ${color:red}le monde !}+` |
+  `+! ednom el ,ruojnoB+` +
+  `+! ednom el30F ,ruojnoB+` (pas de couleur, le code couleur est inversé)
+
+| `+${revscr:xxx}+` +
+  _(WeeChat ≥ 2.7)_ |
+  Chaîne inversée pour l'écran : les codes couleurs ne sont pas inversés. |
+  `+${revscr:Bonjour, le monde !}+` +
+  `+${revscr:Bonjour, ${color:red}le monde !}+` |
+  `+! ednom el ,ruojnoB+` +
+  `+! ednom el ,ruojnoB+` (`pass:[ ,ruojnoB]` en rouge)

 | `+${repeat:nombre,chaîne}+` +
  _(WeeChat ≥ 2.3)_ |
--- a/doc/it/autogen/user/weechat_commands.adoc
+++ b/doc/it/autogen/user/weechat_commands.adoc
@ -301,7 +301,7 @@ Some variables are replaced in expression, using the format ${variable}, variabl
  3. a string with chars to hide (format: "hide:char,string")
  4. a string with max chars (format: "cut:max,suffix,string" or "cut:+max,suffix,string")
     or max chars displayed on screen (format: "cutscr:max,suffix,string" or "cutscr:+max,suffix,string")
-  5. a reversed string (format: "rev:xxx")
+  5. a reversed string (format: "rev:xxx" or "revscr:xxx")
  6. a repeated string (format: "repeat:count,string")
  7. length of a string (format: "length:xxx" or "lengthscr:xxx")
  8. a color (format: "color:xxx", see "Plugin API reference", function "color")
--- a/doc/it/weechat_plugin_api.it.adoc
+++ b/doc/it/weechat_plugin_api.it.adoc
@ -2572,9 +2572,20 @@ expanded to last):

 | `+${rev:xxx}+` +
  _(WeeChat ≥ 2.2)_ |
-  Reversed string. |
-  `+${rev:Hello, world!}+` |
-  `+!dlrow ,olleH+`
+  Reversed string (color codes are reversed, so the string should not contain
+  color codes). |
+  `+${rev:Hello, world!}+` +
+  `+${rev:Hello, ${color:red}world!}+` |
+  `+!dlrow ,olleH+` +
+  `+!dlrow30F ,olleH+` (no color, the color code is reversed)
+
+| `+${revscr:xxx}+` +
+  _(WeeChat ≥ 2.7)_ |
+  Reversed string for screen, color codes are not reversed. |
+  `+${revscr:Hello, world!}+` +
+  `+${revscr:Hello, ${color:red}world!}+` |
+  `+!dlrow ,olleH+` +
+  `+!dlrow ,olleH+` (`pass:[ ,olleH]` in red)

 | `+${repeat:count,string}+` +
  _(WeeChat ≥ 2.3)_ |
--- a/doc/ja/autogen/user/weechat_commands.adoc
+++ b/doc/ja/autogen/user/weechat_commands.adoc
@ -301,7 +301,7 @@ Some variables are replaced in expression, using the format ${variable}, variabl
  3. a string with chars to hide (format: "hide:char,string")
  4. a string with max chars (format: "cut:max,suffix,string" or "cut:+max,suffix,string")
     or max chars displayed on screen (format: "cutscr:max,suffix,string" or "cutscr:+max,suffix,string")
-  5. a reversed string (format: "rev:xxx")
+  5. a reversed string (format: "rev:xxx" or "revscr:xxx")
  6. a repeated string (format: "repeat:count,string")
  7. length of a string (format: "length:xxx" or "lengthscr:xxx")
  8. a color (format: "color:xxx", see "Plugin API reference", function "color")
--- a/doc/ja/weechat_plugin_api.ja.adoc
+++ b/doc/ja/weechat_plugin_api.ja.adoc
@ -2473,11 +2473,24 @@ str5 = weechat.string_eval_expression("password=abc password=def", {}, {}, optio
  `+thi…+` +
  `+こ>>+`

+// TRANSLATION MISSING
 | `+${rev:xxx}+` +
  _(WeeChat バージョン 2.2 以上で利用可)_ |
-  文字順を反転させた文字列。|
-  `+${rev:Hello, world!}+` |
-  `+!dlrow ,olleH+`
+  Reversed string (color codes are reversed, so the string should not contain
+  color codes). |
+  `+${rev:Hello, world!}+` +
+  `+${rev:Hello, ${color:red}world!}+` |
+  `+!dlrow ,olleH+` +
+  `+!dlrow30F ,olleH+` (no color, the color code is reversed)
+
+// TRANSLATION MISSING
+| `+${revscr:xxx}+` +
+  _(WeeChat バージョン 2.7 以上で利用可)_ |
+  Reversed string for screen, color codes are not reversed. |
+  `+${revscr:Hello, world!}+` +
+  `+${revscr:Hello, ${color:red}world!}+` |
+  `+!dlrow ,olleH+` +
+  `+!dlrow ,olleH+` (`pass:[ ,olleH]` in red)

 | `+${repeat:count,string}+` +
  _(WeeChat バージョン 2.3 以上で利用可)_ |
@ -2487,7 +2500,7 @@ str5 = weechat.string_eval_expression("password=abc password=def", {}, {}, optio

 // TRANSLATION MISSING
 | `+${length:xxx}+` +
-  _(WeeChat ≥ 2.7)_ |
+  _(WeeChat バージョン 2.7 以上で利用可)_ |
  Length of string (number of UTF-8 chars), color codes are ignored. |
  `+${length:test}+` +
  `+${length:こんにちは世界}+` |
@ -2496,7 +2509,7 @@ str5 = weechat.string_eval_expression("password=abc password=def", {}, {}, optio

 // TRANSLATION MISSING
 | `+${lengthscr:xxx}+` +
-  _(WeeChat ≥ 2.7)_ |
+  _(WeeChat バージョン 2.7 以上で利用可)_ |
  Length of string displayed on screen, color codes are ignored. |
  `+${lengthscr:test}+` +
  `+${lengthscr:こんにちは世界}+` |
--- a/doc/pl/autogen/user/weechat_commands.adoc
+++ b/doc/pl/autogen/user/weechat_commands.adoc
@ -301,7 +301,7 @@ Some variables are replaced in expression, using the format ${variable}, variabl
  3. a string with chars to hide (format: "hide:char,string")
  4. a string with max chars (format: "cut:max,suffix,string" or "cut:+max,suffix,string")
     or max chars displayed on screen (format: "cutscr:max,suffix,string" or "cutscr:+max,suffix,string")
-  5. a reversed string (format: "rev:xxx")
+  5. a reversed string (format: "rev:xxx" or "revscr:xxx")
  6. a repeated string (format: "repeat:count,string")
  7. length of a string (format: "length:xxx" or "lengthscr:xxx")
  8. a color (format: "color:xxx", see "Plugin API reference", function "color")
--- a/po/cs.po
+++ b/po/cs.po
@ -21,7 +21,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2019-10-11 13:59+0200\n"
+"POT-Creation-Date: 2019-10-12 17:09+0200\n"
 "PO-Revision-Date: 2019-05-13 21:31+0200\n"
 "Last-Translator: Ondřej Súkup <mimi.vx@gmail.com>\n"
 "Language-Team: weechat-dev <weechat-dev@nongnu.org>\n"
@ -1570,7 +1570,7 @@ msgid ""
 "+max,suffix,string\")\n"
 "     or max chars displayed on screen (format: \"cutscr:max,suffix,string\" "
 "or \"cutscr:+max,suffix,string\")\n"
-"  5. a reversed string (format: \"rev:xxx\")\n"
+"  5. a reversed string (format: \"rev:xxx\" or \"revscr:xxx\")\n"
 "  6. a repeated string (format: \"repeat:count,string\")\n"
 "  7. length of a string (format: \"length:xxx\" or \"lengthscr:xxx\")\n"
 "  8. a color (format: \"color:xxx\", see \"Plugin API reference\", function "
--- a/po/de.po
+++ b/po/de.po
@ -24,7 +24,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2019-10-11 13:59+0200\n"
+"POT-Creation-Date: 2019-10-12 17:09+0200\n"
 "PO-Revision-Date: 2019-10-11 22:39+0200\n"
 "Last-Translator: Nils Görs <weechatter@arcor.de>\n"
 "Language-Team: German <kde-i18n-de@kde.org>\n"
@ -1661,6 +1661,7 @@ msgstr "evaluierter Ausdruck"
 msgid "[-n|-s] <expression> || [-n] -c <expression1> <operator> <expression2>"
 msgstr "[-n|-s] <expression> || [-n] -c <expression1> <operator> <expression2>"

+#, fuzzy
 msgid ""
 "        -n: display result without sending it to buffer (debug mode)\n"
 "        -s: split expression before evaluating it (many commands can be "
@ -1706,7 +1707,7 @@ msgid ""
 "+max,suffix,string\")\n"
 "     or max chars displayed on screen (format: \"cutscr:max,suffix,string\" "
 "or \"cutscr:+max,suffix,string\")\n"
-"  5. a reversed string (format: \"rev:xxx\")\n"
+"  5. a reversed string (format: \"rev:xxx\" or \"revscr:xxx\")\n"
 "  6. a repeated string (format: \"repeat:count,string\")\n"
 "  7. length of a string (format: \"length:xxx\" or \"lengthscr:xxx\")\n"
 "  8. a color (format: \"color:xxx\", see \"Plugin API reference\", function "
--- a/po/es.po
+++ b/po/es.po
@ -22,7 +22,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2019-10-11 13:59+0200\n"
+"POT-Creation-Date: 2019-10-12 17:09+0200\n"
 "PO-Revision-Date: 2019-05-13 21:31+0200\n"
 "Last-Translator: Elián Hanisch <lambdae2@gmail.com>\n"
 "Language-Team: weechat-dev <weechat-dev@nongnu.org>\n"
@ -1601,7 +1601,7 @@ msgid ""
 "+max,suffix,string\")\n"
 "     or max chars displayed on screen (format: \"cutscr:max,suffix,string\" "
 "or \"cutscr:+max,suffix,string\")\n"
-"  5. a reversed string (format: \"rev:xxx\")\n"
+"  5. a reversed string (format: \"rev:xxx\" or \"revscr:xxx\")\n"
 "  6. a repeated string (format: \"repeat:count,string\")\n"
 "  7. length of a string (format: \"length:xxx\" or \"lengthscr:xxx\")\n"
 "  8. a color (format: \"color:xxx\", see \"Plugin API reference\", function "
--- a/po/fr.po
+++ b/po/fr.po
@ -21,8 +21,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2019-10-11 13:59+0200\n"
-"PO-Revision-Date: 2019-10-11 20:23+0200\n"
+"POT-Creation-Date: 2019-10-12 17:09+0200\n"
+"PO-Revision-Date: 2019-10-12 17:09+0200\n"
 "Last-Translator: Sébastien Helleu <flashcode@flashtux.org>\n"
 "Language-Team: weechat-dev <weechat-dev@nongnu.org>\n"
 "Language: fr\n"
@ -1675,7 +1675,7 @@ msgid ""
 "+max,suffix,string\")\n"
 "     or max chars displayed on screen (format: \"cutscr:max,suffix,string\" "
 "or \"cutscr:+max,suffix,string\")\n"
-"  5. a reversed string (format: \"rev:xxx\")\n"
+"  5. a reversed string (format: \"rev:xxx\" or \"revscr:xxx\")\n"
 "  6. a repeated string (format: \"repeat:count,string\")\n"
 "  7. length of a string (format: \"length:xxx\" or \"lengthscr:xxx\")\n"
 "  8. a color (format: \"color:xxx\", see \"Plugin API reference\", function "
@ -1789,7 +1789,7 @@ msgstr ""
 "chaîne\" ou \"cut:+max,suffixe,chaîne\")\n"
 "     ou un maximum de caractères affichés à l'écran (format : \"cutscr:max,"
 "suffixe,chaîne\" ou \"cutscr:+max,suffixe,chaîne\")\n"
-"  5. une chaîne inversée (format : \"rev:xxx\")\n"
+"  5. une chaîne inversée (format : \"rev:xxx\" ou \"revscr:xxx\")\n"
 "  6. une chaîne répétée (format : \"repeat:nombre,chaîne\")\n"
 "  7. longueur d'une chaîne (format : \"length:xxx\" ou \"lengthscr:xxx\")\n"
 "  8. une couleur (format : \"color:xxx\", voir la \"Référence API extension"
--- a/po/hu.po
+++ b/po/hu.po
@ -20,7 +20,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2019-10-11 13:59+0200\n"
+"POT-Creation-Date: 2019-10-12 17:09+0200\n"
 "PO-Revision-Date: 2019-05-13 21:31+0200\n"
 "Last-Translator: Andras Voroskoi <voroskoi@frugalware.org>\n"
 "Language-Team: weechat-dev <weechat-dev@nongnu.org>\n"
@ -1489,7 +1489,7 @@ msgid ""
 "+max,suffix,string\")\n"
 "     or max chars displayed on screen (format: \"cutscr:max,suffix,string\" "
 "or \"cutscr:+max,suffix,string\")\n"
-"  5. a reversed string (format: \"rev:xxx\")\n"
+"  5. a reversed string (format: \"rev:xxx\" or \"revscr:xxx\")\n"
 "  6. a repeated string (format: \"repeat:count,string\")\n"
 "  7. length of a string (format: \"length:xxx\" or \"lengthscr:xxx\")\n"
 "  8. a color (format: \"color:xxx\", see \"Plugin API reference\", function "
--- a/po/it.po
+++ b/po/it.po
@ -20,7 +20,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2019-10-11 13:59+0200\n"
+"POT-Creation-Date: 2019-10-12 17:09+0200\n"
 "PO-Revision-Date: 2019-05-13 21:31+0200\n"
 "Last-Translator: Esteban I. Ruiz Moreno <exio4.com@gmail.com>\n"
 "Language-Team: weechat-dev <weechat-dev@nongnu.org>\n"
@ -1584,7 +1584,7 @@ msgid ""
 "+max,suffix,string\")\n"
 "     or max chars displayed on screen (format: \"cutscr:max,suffix,string\" "
 "or \"cutscr:+max,suffix,string\")\n"
-"  5. a reversed string (format: \"rev:xxx\")\n"
+"  5. a reversed string (format: \"rev:xxx\" or \"revscr:xxx\")\n"
 "  6. a repeated string (format: \"repeat:count,string\")\n"
 "  7. length of a string (format: \"length:xxx\" or \"lengthscr:xxx\")\n"
 "  8. a color (format: \"color:xxx\", see \"Plugin API reference\", function "
--- a/po/ja.po
+++ b/po/ja.po
@ -20,7 +20,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2019-10-11 13:59+0200\n"
+"POT-Creation-Date: 2019-10-12 17:09+0200\n"
 "PO-Revision-Date: 2019-09-22 18:54+0200\n"
 "Last-Translator: AYANOKOUZI, Ryuunosuke <i38w7i3@yahoo.co.jp>\n"
 "Language-Team: Japanese <https://github.com/l/weechat/tree/master/"
@ -1638,7 +1638,7 @@ msgid ""
 "+max,suffix,string\")\n"
 "     or max chars displayed on screen (format: \"cutscr:max,suffix,string\" "
 "or \"cutscr:+max,suffix,string\")\n"
-"  5. a reversed string (format: \"rev:xxx\")\n"
+"  5. a reversed string (format: \"rev:xxx\" or \"revscr:xxx\")\n"
 "  6. a repeated string (format: \"repeat:count,string\")\n"
 "  7. length of a string (format: \"length:xxx\" or \"lengthscr:xxx\")\n"
 "  8. a color (format: \"color:xxx\", see \"Plugin API reference\", function "
--- a/po/pl.po
+++ b/po/pl.po
@ -22,7 +22,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2019-10-11 13:59+0200\n"
+"POT-Creation-Date: 2019-10-12 17:09+0200\n"
 "PO-Revision-Date: 2019-09-22 18:54+0200\n"
 "Last-Translator: Krzysztof Korościk <soltys@soltys.info>\n"
 "Language-Team: Polish <kde-i18n-doc@kde.org>\n"
@ -1673,7 +1673,7 @@ msgid ""
 "+max,suffix,string\")\n"
 "     or max chars displayed on screen (format: \"cutscr:max,suffix,string\" "
 "or \"cutscr:+max,suffix,string\")\n"
-"  5. a reversed string (format: \"rev:xxx\")\n"
+"  5. a reversed string (format: \"rev:xxx\" or \"revscr:xxx\")\n"
 "  6. a repeated string (format: \"repeat:count,string\")\n"
 "  7. length of a string (format: \"length:xxx\" or \"lengthscr:xxx\")\n"
 "  8. a color (format: \"color:xxx\", see \"Plugin API reference\", function "
--- a/po/pt.po
+++ b/po/pt.po
@ -20,7 +20,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2019-10-11 13:59+0200\n"
+"POT-Creation-Date: 2019-10-12 17:09+0200\n"
 "PO-Revision-Date: 2019-09-22 18:54+0200\n"
 "Last-Translator: Vasco Almeida <vascomalmeida@sapo.pt>\n"
 "Language-Team: Portuguese <>\n"
@ -1642,7 +1642,7 @@ msgid ""
 "+max,suffix,string\")\n"
 "     or max chars displayed on screen (format: \"cutscr:max,suffix,string\" "
 "or \"cutscr:+max,suffix,string\")\n"
-"  5. a reversed string (format: \"rev:xxx\")\n"
+"  5. a reversed string (format: \"rev:xxx\" or \"revscr:xxx\")\n"
 "  6. a repeated string (format: \"repeat:count,string\")\n"
 "  7. length of a string (format: \"length:xxx\" or \"lengthscr:xxx\")\n"
 "  8. a color (format: \"color:xxx\", see \"Plugin API reference\", function "
--- a/po/pt_BR.po
+++ b/po/pt_BR.po
@ -21,7 +21,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2019-10-11 13:59+0200\n"
+"POT-Creation-Date: 2019-10-12 17:09+0200\n"
 "PO-Revision-Date: 2019-05-13 21:32+0200\n"
 "Last-Translator: Eduardo Elias <camponez@gmail.com>\n"
 "Language-Team: weechat-dev <weechat-dev@nongnu.org>\n"
@ -1646,7 +1646,7 @@ msgid ""
 "+max,suffix,string\")\n"
 "     or max chars displayed on screen (format: \"cutscr:max,suffix,string\" "
 "or \"cutscr:+max,suffix,string\")\n"
-"  5. a reversed string (format: \"rev:xxx\")\n"
+"  5. a reversed string (format: \"rev:xxx\" or \"revscr:xxx\")\n"
 "  6. a repeated string (format: \"repeat:count,string\")\n"
 "  7. length of a string (format: \"length:xxx\" or \"lengthscr:xxx\")\n"
 "  8. a color (format: \"color:xxx\", see \"Plugin API reference\", function "
--- a/po/ru.po
+++ b/po/ru.po
@ -21,7 +21,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2019-10-11 13:59+0200\n"
+"POT-Creation-Date: 2019-10-12 17:09+0200\n"
 "PO-Revision-Date: 2019-05-13 21:32+0200\n"
 "Last-Translator: Aleksey V Zapparov AKA ixti <ixti@member.fsf.org>\n"
 "Language-Team: weechat-dev <weechat-dev@nongnu.org>\n"
@ -1511,7 +1511,7 @@ msgid ""
 "+max,suffix,string\")\n"
 "     or max chars displayed on screen (format: \"cutscr:max,suffix,string\" "
 "or \"cutscr:+max,suffix,string\")\n"
-"  5. a reversed string (format: \"rev:xxx\")\n"
+"  5. a reversed string (format: \"rev:xxx\" or \"revscr:xxx\")\n"
 "  6. a repeated string (format: \"repeat:count,string\")\n"
 "  7. length of a string (format: \"length:xxx\" or \"lengthscr:xxx\")\n"
 "  8. a color (format: \"color:xxx\", see \"Plugin API reference\", function "
--- a/po/tr.po
+++ b/po/tr.po
@ -20,7 +20,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2019-10-11 13:59+0200\n"
+"POT-Creation-Date: 2019-10-12 17:09+0200\n"
 "PO-Revision-Date: 2019-05-13 21:32+0200\n"
 "Last-Translator: Hasan Kiran <sunder67@hotmail.com>\n"
 "Language-Team: weechat-dev <weechat-dev@nongnu.org>\n"
@ -1342,7 +1342,7 @@ msgid ""
 "+max,suffix,string\")\n"
 "     or max chars displayed on screen (format: \"cutscr:max,suffix,string\" "
 "or \"cutscr:+max,suffix,string\")\n"
-"  5. a reversed string (format: \"rev:xxx\")\n"
+"  5. a reversed string (format: \"rev:xxx\" or \"revscr:xxx\")\n"
 "  6. a repeated string (format: \"repeat:count,string\")\n"
 "  7. length of a string (format: \"length:xxx\" or \"lengthscr:xxx\")\n"
 "  8. a color (format: \"color:xxx\", see \"Plugin API reference\", function "
--- a/po/weechat.pot
+++ b/po/weechat.pot
@ -21,7 +21,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WeeChat\n"
 "Report-Msgid-Bugs-To: flashcode@flashtux.org\n"
-"POT-Creation-Date: 2019-10-11 13:59+0200\n"
+"POT-Creation-Date: 2019-10-12 17:09+0200\n"
 "PO-Revision-Date: 2014-08-16 10:27+0200\n"
 "Last-Translator: Sébastien Helleu <flashcode@flashtux.org>\n"
 "Language-Team: weechat-dev <weechat-dev@nongnu.org>\n"
@ -1344,7 +1344,7 @@ msgid ""
 "+max,suffix,string\")\n"
 "     or max chars displayed on screen (format: \"cutscr:max,suffix,string\" "
 "or \"cutscr:+max,suffix,string\")\n"
-"  5. a reversed string (format: \"rev:xxx\")\n"
+"  5. a reversed string (format: \"rev:xxx\" or \"revscr:xxx\")\n"
 "  6. a repeated string (format: \"repeat:count,string\")\n"
 "  7. length of a string (format: \"length:xxx\" or \"lengthscr:xxx\")\n"
 "  8. a color (format: \"color:xxx\", see \"Plugin API reference\", function "
--- a/src/core/wee-command.c
+++ b/src/core/wee-command.c
@ -7353,7 +7353,7 @@ command_init ()
           "     or max chars displayed on screen "
           "(format: \"cutscr:max,suffix,string\" or "
           "\"cutscr:+max,suffix,string\")\n"
-           "  5. a reversed string (format: \"rev:xxx\")\n"
+           "  5. a reversed string (format: \"rev:xxx\" or \"revscr:xxx\")\n"
           "  6. a repeated string (format: \"repeat:count,string\")\n"
           "  7. length of a string (format: \"length:xxx\" or "
           "\"lengthscr:xxx\")\n"
--- a/src/core/wee-eval.c
+++ b/src/core/wee-eval.c
@ -295,7 +295,8 @@ end:
 *   5. a string with max chars (format: cut:max,suffix,string or
 *      cut:+max,suffix,string) or max chars on screen
 *      (format: cutscr:max,suffix,string or cutscr:+max,suffix,string)
- *   6. a reversed string (format: rev:xxx)
+ *   6. a reversed string (format: rev:xxx) or reversed string for screen,
+ *      color codes are not reversed (format: revscr:xxx)
 *   7. a repeated string (format: repeat:count,string)
 *   8. length of a string (format: length:xxx) or length of a string on screen
 *      (format: lengthscr:xxx); color codes are ignored
@ -459,9 +460,9 @@ eval_replace_vars_cb (void *data, const char *text)

    /* 6. reverse string */
    if (strncmp (text, "rev:", 4) == 0)
-    {
        return string_reverse (text + 4);
-    }
+    if (strncmp (text, "revscr:", 7) == 0)
+        return string_reverse_screen (text + 7);

    /* 7. repeated string */
    if (strncmp (text, "repeat:", 7) == 0)
--- a/src/core/wee-string.c
+++ b/src/core/wee-string.c
@ -203,6 +203,66 @@ string_reverse (const char *string)
    return result;
 }

+/*
+ * Reverses a string for screen: color codes are not reversed.
+ * For example: reverse of "<red>test" is "test<red>" where the color code
+ * "<red>" is kept as-is, so it is still valid (this is not the case with
+ * function string_reverse).
+ *
+ * Note: result must be freed after use.
+ */
+
+char *
+string_reverse_screen (const char *string)
+{
+    int length, color_size, char_size;
+    const char *ptr_string, *ptr_next;
+    char *result, *ptr_result;
+
+    if (!string)
+        return NULL;
+
+    if (!string[0])
+        return strdup (string);
+
+    length = strlen (string);
+    result = malloc (length + 1);
+    if (!result)
+        return NULL;
+
+    ptr_string = string;
+    ptr_result = result + length;
+    ptr_result[0] = '\0';
+
+    while (ptr_string && ptr_string[0])
+    {
+        ptr_next = gui_chat_string_next_char (NULL, NULL,
+                                              (const unsigned char *)ptr_string,
+                                              0, 0, 0);
+        if (!ptr_next)
+            ptr_next = ptr_string + strlen (ptr_string);
+        color_size = ptr_next - ptr_string;
+        if (color_size > 0)
+        {
+            /* add the color code as-is */
+            ptr_result -= color_size;
+            memcpy (ptr_result, ptr_string, color_size);
+            ptr_string += color_size;
+        }
+
+        if (ptr_string[0])
+        {
+            char_size = utf8_char_size (ptr_string);
+
+            ptr_result -= char_size;
+            memcpy (ptr_result, ptr_string, char_size);
+            ptr_string += char_size;
+        }
+    }
+
+    return result;
+}
+
 /*
 * Repeats a string a given number of times.
 *
--- a/src/core/wee-string.h
+++ b/src/core/wee-string.h
@ -40,6 +40,7 @@ extern char *string_strndup (const char *string, int length);
 extern char *string_cut (const char *string, int length, int count_suffix,
                         int screen, const char *cut_suffix);
 extern char *string_reverse (const char *string);
+extern char *string_reverse_screen (const char *string);
 extern char *string_repeat (const char *string, int count);
 extern void string_tolower (char *string);
 extern void string_toupper (char *string);
--- a/tests/unit/core/test-core-eval.cpp
+++ b/tests/unit/core/test-core-eval.cpp
@ -354,6 +354,18 @@ TEST(CoreEval, EvalExpression)
    /* test reverse of string */
    WEE_CHECK_EVAL("!dlrow ,olleH", "${rev:Hello, world!}");
    WEE_CHECK_EVAL("界世はちにんこ", "${rev:こんにちは世界}");
+    WEE_CHECK_EVAL("!dlrow30F\x19 ,olleH",
+                   "${rev:Hello, ${color:red}world!}");
+    WEE_CHECK_EVAL("Hello, \x19" "F03world!",
+                   "${rev:${rev:Hello, ${color:red}world!}}");
+
+    /* test reverse of string (for screen) */
+    WEE_CHECK_EVAL("!dlrow ,olleH", "${revscr:Hello, world!}");
+    WEE_CHECK_EVAL("界世はちにんこ", "${revscr:こんにちは世界}");
+    WEE_CHECK_EVAL("!dlrow\x19" "F03 ,olleH",
+                   "${revscr:Hello, ${color:red}world!}");
+    WEE_CHECK_EVAL("Hello, \x19" "F03world!",
+                   "${revscr:${revscr:Hello, ${color:red}world!}}");

    /* test repeat of string */
    WEE_CHECK_EVAL("", "${repeat:-1,x}");
--- a/tests/unit/core/test-core-string.cpp
+++ b/tests/unit/core/test-core-string.cpp
@ -35,6 +35,7 @@ extern "C"
 #include "src/core/weechat.h"
 #include "src/core/wee-string.h"
 #include "src/core/wee-hashtable.h"
+#include "src/gui/gui-color.h"
 #include "src/plugins/plugin.h"
 }

@ -276,6 +277,8 @@ TEST(CoreString, Cut)

 TEST(CoreString, Reverse)
 {
+    char string[128];
+
    POINTERS_EQUAL(NULL, string_reverse (NULL));
    STRCMP_EQUAL("", string_reverse (""));

@ -291,6 +294,73 @@ TEST(CoreString, Reverse)
     * the function string_reverse accepts only an UTF-8 string as input
     */
    STRCMP_EQUAL("\xeblon", string_reverse ("no\xebl"));
+
+    /* reverse of string with color codes */
+    snprintf (string, sizeof (string),
+              "%s",
+              gui_color_get_custom ("red"));
+    STRCMP_EQUAL("30F\x19", string_reverse (string));
+
+    snprintf (string, sizeof (string),
+              "%s red",
+              gui_color_get_custom ("red"));
+    STRCMP_EQUAL("der 30F\x19", string_reverse (string));
+
+    snprintf (string, sizeof (string),
+              "red %s",
+              gui_color_get_custom ("red"));
+    STRCMP_EQUAL("30F\x19 der", string_reverse (string));
+}
+
+/*
+ * Tests functions:
+ *   string_reverse_screen
+ */
+
+TEST(CoreString, ReverseScreen)
+{
+    char string[128], result[128];
+
+    POINTERS_EQUAL(NULL, string_reverse_screen (NULL));
+    STRCMP_EQUAL("", string_reverse_screen (""));
+
+    /* reverse of UTF-8 string */
+    STRCMP_EQUAL("n", string_reverse_screen ("n"));
+    STRCMP_EQUAL("on", string_reverse_screen ("no"));
+    STRCMP_EQUAL("ëon", string_reverse_screen ("noë"));
+    STRCMP_EQUAL("lëon", string_reverse_screen ("noël"));
+    STRCMP_EQUAL("界世はちにんこ", string_reverse_screen ("こんにちは世界"));
+
+    /*
+     * reverse of ISO-8859-15 string: the result may not be what you expect:
+     * the function string_reverse_screen accepts only an UTF-8 string as input
+     */
+    STRCMP_EQUAL("\xeblon", string_reverse_screen ("no\xebl"));
+
+    /* reverse of string with color codes */
+    snprintf (string, sizeof (string),
+              "%s",
+              gui_color_get_custom ("red"));
+    snprintf (result, sizeof (result),
+              "%s",
+              gui_color_get_custom ("red"));
+    STRCMP_EQUAL(result, string_reverse_screen (string));
+
+    snprintf (string, sizeof (string),
+              "%s red",
+              gui_color_get_custom ("red"));
+    snprintf (result, sizeof (result),
+              "der %s",
+              gui_color_get_custom ("red"));
+    STRCMP_EQUAL(result, string_reverse_screen (string));
+
+    snprintf (string, sizeof (string),
+              "red %s",
+              gui_color_get_custom ("red"));
+    snprintf (result, sizeof (result),
+              "%s der",
+              gui_color_get_custom ("red"));
+    STRCMP_EQUAL(result, string_reverse_screen (string));
 }

 /*
--- a/tests/unit/core/test-core-utf8.cpp
+++ b/tests/unit/core/test-core-utf8.cpp
@ -353,6 +353,14 @@ TEST(CoreUtf8, Size)
    LONGS_EQUAL(3, utf8_char_size ("€"));
    LONGS_EQUAL(3, utf8_char_size (cjk_yellow));
    LONGS_EQUAL(4, utf8_char_size (han_char));
+    /* ë as iso-8859-15: invalid UTF-8 */
+    LONGS_EQUAL(1, utf8_char_size ("\xeb"));
+    /* ël as iso-8859-15: invalid UTF-8 */
+    LONGS_EQUAL(2, utf8_char_size ("\xebl"));
+    /* ëlm as iso-8859-15: invalid UTF-8 */
+    LONGS_EQUAL(3, utf8_char_size ("\xeblm"));
+    /* ëlmn as iso-8859-15: invalid UTF-8 */
+    LONGS_EQUAL(3, utf8_char_size ("\xeblmn"));

    /* char size on screen */
    LONGS_EQUAL(0, utf8_char_size_screen (NULL));
@ -361,6 +369,14 @@ TEST(CoreUtf8, Size)
    LONGS_EQUAL(1, utf8_char_size_screen ("ë"));
    LONGS_EQUAL(1, utf8_char_size_screen ("€"));
    LONGS_EQUAL(2, utf8_char_size_screen (cjk_yellow));
+    /* ë as iso-8859-15: invalid UTF-8 */
+    LONGS_EQUAL(1, utf8_char_size_screen ("\xeb"));
+    /* ël as iso-8859-15: invalid UTF-8 */
+    LONGS_EQUAL(1, utf8_char_size_screen ("\xebl"));
+    /* ëlm as iso-8859-15: invalid UTF-8 */
+    LONGS_EQUAL(1, utf8_char_size_screen ("\xeblm"));
+    /* ëlmn as iso-8859-15: invalid UTF-8 */
+    LONGS_EQUAL(1, utf8_char_size_screen ("\xeblmn"));

    /* length of string (in chars) */
    LONGS_EQUAL(0, utf8_strlen (NULL));