From 9fbb365684ef662fc183ebd45c2eeb50f40589b5 Mon Sep 17 00:00:00 2001 From: Simon Tatham Date: Sun, 27 Dec 2009 10:01:16 +0000 Subject: Introduce, and implement as usefully as I can in all front ends, a new function in the drawing API which permits the display of text from outside basic ASCII. A fallback mechanism is provided so that puzzles can give a list of strings they'd like to display in order of preference and the system will return the best one it can manage; puzzles are required to cope with ASCII-only front ends. [originally from svn r8793] --- drawing.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) (limited to 'drawing.c') diff --git a/drawing.c b/drawing.c index 26df1ff..4cbb46d 100644 --- a/drawing.c +++ b/drawing.c @@ -127,6 +127,39 @@ void end_draw(drawing *dr) dr->api->end_draw(dr->handle); } +char *text_fallback(drawing *dr, const char *const *strings, int nstrings) +{ + int i; + + /* + * If the drawing implementation provides one of these, use it. + */ + if (dr && dr->api->text_fallback) + return dr->api->text_fallback(dr->handle, strings, nstrings); + + /* + * Otherwise, do the simple thing and just pick the first string + * that fits in plain ASCII. It will then need no translation + * out of UTF-8. + */ + for (i = 0; i < nstrings; i++) { + const char *p; + + for (p = strings[i]; *p; p++) + if (*p & 0x80) + break; + if (!*p) + return dupstr(strings[i]); + } + + /* + * The caller was responsible for making sure _some_ string in + * the list was in plain ASCII. + */ + assert(!"Should never get here"); + return NULL; /* placate optimiser */ +} + void status_bar(drawing *dr, char *text) { char *rewritten; -- cgit v1.1