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cli: align UTF-8 strings properly

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Not all utf-8 characters occupy 1 screen column. Some may be 2-column
wide, some are unprintable - zero columns.
This commit is contained in:
Jiří Klimeš
2010-04-26 17:32:18 +02:00
parent f53a2aeac9
commit d1f63c62f0
2 changed files with 24 additions and 5 deletions
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28
cli/src/utils.c
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@@ -74,6 +74,24 @@ ssid_to_printable (const char *str, gsize len)
return printable_str;
}
/*
* Find out how many columns an UTF-8 string occupies on the screen
*/
int
nmc_string_screen_width (const char *start, const char *end)
{
int width = 0;
if (end == NULL)
end = start + strlen (start);
while (start < end) {
width += g_unichar_iswide (g_utf8_get_char (start)) ? 2 : g_unichar_iszerowidth (g_utf8_get_char (start)) ? 0 : 1;
start = g_utf8_next_char (start);
}
return width;
}
/*
* Parse comma separated fields in 'fields_str' according to 'fields_array'.
* IN: 'field_str': comma-separated fields names
@@ -174,12 +192,12 @@ print_fields (const NmcPrintFields fields, const NmcOutputField field_values[])
enum { ML_HEADER_WIDTH = 79 };
if (main_header && pretty) {
/* Print the main header */
int header_width = g_utf8_strlen (fields.header_name, -1) + 4;
int header_width = nmc_string_screen_width (fields.header_name, NULL) + 4;
table_width = header_width < ML_HEADER_WIDTH ? ML_HEADER_WIDTH : header_width;
line = g_strnfill (ML_HEADER_WIDTH, '=');
width1 = strlen (fields.header_name);
width2 = g_utf8_strlen (fields.header_name, -1);
width2 = nmc_string_screen_width (fields.header_name, NULL);
printf ("%s\n", line);
printf ("%*s\n", (table_width + width2)/2 + width1 - width2, fields.header_name);
printf ("%s\n", line);
@@ -232,7 +250,7 @@ print_fields (const NmcPrintFields fields, const NmcOutputField field_values[])
g_string_append_c (str, ':'); /* Column separator */
} else {
width1 = strlen (value);
width2 = g_utf8_strlen (value, -1); /* Width of the string (in screen colums) */
width2 = nmc_string_screen_width (value, NULL); /* Width of the string (in screen colums) */
if (strlen (value) == 0)
value = "--";
g_string_append_printf (str, "%-*s", field_values[idx].width + width1 - width2, value);
@@ -243,12 +261,12 @@ print_fields (const NmcPrintFields fields, const NmcOutputField field_values[])
/* Print the main table header */
if (main_header && pretty) {
int header_width = g_utf8_strlen (fields.header_name, -1) + 4;
int header_width = nmc_string_screen_width (fields.header_name, NULL) + 4;
table_width = table_width < header_width ? header_width : table_width;
line = g_strnfill (table_width, '=');
width1 = strlen (fields.header_name);
width2 = g_utf8_strlen (fields.header_name, -1);
width2 = nmc_string_screen_width (fields.header_name, NULL);
printf ("%s\n", line);
printf ("%*s\n", (table_width + width2)/2 + width1 - width2, fields.header_name);
printf ("%s\n", line);