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VerbosePkgLists: format table lines in i18n-compatible way

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This had the unfortunate implementation detail that depended on the
strings having 1 byte == 1 column hold true. As we know, this is not at
all the case once you move past the base ASCII character set.

Reimplement this whole thing so it doesn't depend on format strings at
all. Instead, simply calculate the max column widths, and then when
displaying each row add the correct amount of padding using UTF-8 safe
string length functions.

Before:

名字        旧版本新版本  净变化 下载大小

libgee                0.6.2.1-1  0.60 MiB    0.10 MiB
libsocialweb          0.25.19-2  1.92 MiB    0.23 MiB
folks                 0.6.3.2-1  1.38 MiB    0.25 MiB

After:

名字          旧版本  新版本     净变化    下载大小

libgee                0.6.2.1-1  0.60 MiB  0.10 MiB
libsocialweb          0.25.19-2  1.92 MiB  0.23 MiB
folks                 0.6.3.2-1  1.38 MiB  0.25 MiB

Signed-off-by: Dan McGee <dan@archlinux.org>
This commit is contained in:
Dan McGee 2011-10-10 21:26:17 -05:00
parent d3d3b861ac
commit 61c6ae01b3
2 changed files with 48 additions and 42 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
NEWS
View File

@ -1,5 +1,6 @@
VERSION DESCRIPTION
-----------------------------------------------------------------------------
4.0.1 - Ensure VerbosePkgList table display supports multibyte chars
4.0.0 - well-integrated and powerful signed packages and databases
support in pacman, the library, and scripts (FS#5331)
- over 800 commits to pacman.git since 3.5.4 release

89
src/pacman/util.c
View File

@ -488,34 +488,47 @@ void string_display(const char *title, const char *string)
}
static void table_print_line(const alpm_list_t *line,
const alpm_list_t *formats)
size_t colcount, size_t *widths)
{
const alpm_list_t *curformat = formats;
const alpm_list_t *curcell = line;
size_t i;
const alpm_list_t *curcell;
while(curcell && curformat) {
printf(alpm_list_getdata(curformat), alpm_list_getdata(curcell));
curcell = alpm_list_next(curcell);
curformat = alpm_list_next(curformat);
for(i = 0, curcell = line; curcell && i < colcount;
i++, curcell = alpm_list_next(curcell)) {
const char *value = curcell->data;
size_t len = string_length(value);
/* silly printf requires padding size to be an int */
int padding = (int)widths[i] - (int)len;
if(padding < 0) {
padding = 0;
}
/* left-align all but the last column */
if(i + 1 < colcount) {
printf("%s%*s", value, padding, "");
} else {
printf("%*s%s", padding, "", value);
}
}
printf("\n");
}
/* creates format strings by checking max cell lengths in cols */
static alpm_list_t *table_create_format(const alpm_list_t *header,
const alpm_list_t *rows)
/* find the max string width of each column */
static size_t table_calc_widths(const alpm_list_t *header,
const alpm_list_t *rows, size_t totalcols, size_t **widths)
{
alpm_list_t *formats = NULL;
const alpm_list_t *i;
const unsigned short padding = 2;
size_t curcol, totalcols, totalwidth = 0;
size_t curcol, totalwidth = 0;
size_t *colwidths;
totalcols = alpm_list_count(header);
if(totalcols <= 0) {
return 0;
}
colwidths = malloc(totalcols * sizeof(size_t));
if(!colwidths) {
return NULL;
return 0;
}
/* header determines column count and initial values of longest_strs */
for(i = header, curcol = 0; i; i = alpm_list_next(i), curcol++) {
@ -536,30 +549,16 @@ static alpm_list_t *table_create_format(const alpm_list_t *header,
}
}
/* now use the column width info to generate format strings */
for(curcol = 0; curcol < totalcols; curcol++) {
const char *display;
char *formatstr;
size_t colwidth = colwidths[curcol] + padding;
totalwidth += colwidth;
/* right align the last column for a cleaner table display */
display = (curcol + 1 < totalcols) ? "%%-%ds" : "%%%ds";
pm_asprintf(&formatstr, display, colwidth);
formats = alpm_list_add(formats, formatstr);
for(i = header, curcol = 0; i; i = alpm_list_next(i), curcol++) {
/* pad everything but the last column */
if(curcol + 1 < totalcols) {
colwidths[curcol] += padding;
}
totalwidth += colwidths[curcol];
}
free(colwidths);
/* return NULL if terminal is not wide enough */
if(totalwidth > getcols()) {
fprintf(stderr, _("insufficient columns available for table display\n"));
FREELIST(formats);
return NULL;
}
return formats;
*widths = colwidths;
return totalwidth;
}
/** Displays the list in table format
@ -576,14 +575,20 @@ int table_display(const char *title, const alpm_list_t *header,
const alpm_list_t *rows)
{
const alpm_list_t *i;
alpm_list_t *formats;
size_t *widths = NULL, totalcols, totalwidth;
if(rows == NULL || header == NULL) {
return 0;
}
formats = table_create_format(header, rows);
if(formats == NULL) {
totalcols = alpm_list_count(header);
totalwidth = table_calc_widths(header, rows, totalcols, &widths);
/* return -1 if terminal is not wide enough */
if(totalwidth > getcols()) {
fprintf(stderr, _("insufficient columns available for table display\n"));
return -1;
}
if(!totalwidth || !widths) {
return -1;
}
@ -591,14 +596,14 @@ int table_display(const char *title, const alpm_list_t *header,
printf("%s\n\n", title);
}
table_print_line(header, formats);
table_print_line(header, totalcols, widths);
printf("\n");
for(i = rows; i; i = alpm_list_next(i)) {
table_print_line(alpm_list_getdata(i), formats);
table_print_line(alpm_list_getdata(i), totalcols, widths);
}
FREELIST(formats);
free(widths);
return 0;
}