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Wayland: add support of recoded UTF8 text in clipboard.

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ManoloFLTK
2026-01-23 18:41:19 +01:00
parent 05a3f82a5c
commit dd9cb9f042
1 changed files with 34 additions and 1 deletions
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src/drivers/Wayland/fl_wayland_clipboard_dnd.cxx
+34 -1
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@@ -1,7 +1,7 @@
//
// Wayland-specific code for clipboard and drag-n-drop support.
//
// Copyright 1998-2024 by Bill Spitzak and others.
// Copyright 1998-2026 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file. If this
@@ -431,6 +431,39 @@ way_out:
fl_selection_length[1] = strlen(fl_selection_buffer[1]);
}
Fl::e_clipboard_type = Fl::clipboard_plain_text;
/*
UTF8 text from clipboard may encode non-ASCII codepoints as in these examples
U+1F431 --> UTF8: 0xF0,0x9F,0x90,0xB1 --> encoded "\F0\9F\90\B1"
U+A1 --> UTF8: 0xC2, 0xA1 --> encoded "\C2\A1"
Whereas ASCII characters are not encoded.
The following decodes that to restore genuine UTF8.
*/
/* for (int i = 0; i < fl_selection_length[1]; i++) {
printf("%c[%x] ",fl_selection_buffer[1][i], fl_selection_buffer[1][i]);
} puts("");*/
int l_input = fl_selection_length[1], l = 0, i = 0, b;
char *str = new char[l_input];
while (i < l_input) {
if (i + 4 < l_input && fl_selection_buffer[1][i] == '\\' &&
fl_selection_buffer[1][i+3] == '\\' &&
isxdigit(fl_selection_buffer[1][i+1]) && isxdigit(fl_selection_buffer[1][i+1])) {
sscanf(fl_selection_buffer[1] + i + 1, "%x", &b);
int l_utf8 = fl_utf8len(b);
if (i + 3 * l_utf8 <= l_input && fl_selection_buffer[1][i+3*(l_utf8-1)] == '\\') {
while (l_utf8-- > 0) {
sscanf(fl_selection_buffer[1] + i + 1, "%x", &b);
str[l++] = b;
i += 3;
}
continue;
}
}
str[l++] = fl_selection_buffer[1][i++];
}
memcpy(fl_selection_buffer[1], str, l);
delete[] str;
fl_selection_length[1] = l;
fl_selection_buffer[1][l] = 0;
}