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https://github.com/swaywm/sway.git
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tray: better errors when parsing index.theme
This commit is contained in:
Ian Fan
Simon Ser
parent
b54f5e170a
commit
66f0c91bb8
1 changed files with 90 additions and 60 deletions
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@ -14,6 +14,10 @@
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#include "log.h"
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#include "stringop.h"
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static int cmp_id(const void *item, const void *cmp_to) {
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return strcmp(item, cmp_to);
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}
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static bool dir_exists(char *path) {
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struct stat sb;
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return stat(path, &sb) == 0 && S_ISDIR(sb.st_mode);
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@ -78,35 +82,37 @@ static void destroy_theme(struct icon_theme *theme) {
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free(theme);
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}
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static int cmp_group(const void *item, const void *cmp_to) {
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return strcmp(item, cmp_to);
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}
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static bool validate_icon_theme(struct icon_theme *theme) {
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return theme && theme->name && theme->comment && theme->directories;
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}
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static bool group_handler(char *old_group, char *new_group,
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static const char *group_handler(char *old_group, char *new_group,
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struct icon_theme *theme) {
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if (!old_group) { // first group must be "Icon Theme"
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if (!new_group) {
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return true;
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}
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return strcmp(new_group, "Icon Theme") != 0;
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if (!old_group) {
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return new_group && strcmp(new_group, "Icon Theme") == 0 ? NULL :
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"first group must be 'Icon Theme'";
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}
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if (strcmp(old_group, "Icon Theme") == 0) {
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if (!validate_icon_theme(theme)) {
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return true;
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if (!theme->name) {
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return "missing required key 'Name'";
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} else if (!theme->comment) {
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return "missing required key 'Comment'";
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} else if (!theme->directories) {
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return "missing required key 'Directories'";
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} else {
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for (char *c = theme->name; *c; ++c) {
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if (*c == ',' || *c == ' ') {
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return "malformed theme name";
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}
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}
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}
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} else {
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if (theme->subdirs->length == 0) { // skip
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return false;
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return NULL;
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}
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struct icon_theme_subdir *subdir =
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theme->subdirs->items[theme->subdirs->length - 1];
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if (!subdir->size) return true;
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if (!subdir->size) {
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return "missing required key 'Size'";
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}
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switch (subdir->type) {
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case FIXED: subdir->max_size = subdir->min_size = subdir->size;
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@ -122,20 +128,20 @@ static bool group_handler(char *old_group, char *new_group,
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}
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}
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if (new_group && list_seq_find(theme->directories, cmp_group, new_group) != -1) {
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if (new_group && list_seq_find(theme->directories, cmp_id, new_group) != -1) {
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struct icon_theme_subdir *subdir = calloc(1, sizeof(struct icon_theme_subdir));
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if (!subdir) {
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return true;
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return "out of memory";
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}
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subdir->name = strdup(new_group);
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subdir->threshold = 2;
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list_add(theme->subdirs, subdir);
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}
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return false;
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return NULL;
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}
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static int entry_handler(char *group, char *key, char *value,
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static const char *entry_handler(char *group, char *key, char *value,
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struct icon_theme *theme) {
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if (strcmp(group, "Icon Theme") == 0) {
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if (strcmp(key, "Name") == 0) {
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@ -149,20 +155,17 @@ static int entry_handler(char *group, char *key, char *value,
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} // Ignored: ScaledDirectories, Hidden, Example
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} else {
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if (theme->subdirs->length == 0) { // skip
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return false;
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return NULL;
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}
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struct icon_theme_subdir *subdir =
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theme->subdirs->items[theme->subdirs->length - 1];
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if (strcmp(subdir->name, group) != 0) { // skip
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return false;
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return NULL;
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}
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char *end;
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int n = strtol(value, &end, 10);
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if (strcmp(key, "Size") == 0) {
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subdir->size = n;
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return *end != '\0';
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if (strcmp(key, "Context") == 0) {
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return NULL; // ignored, but explicitly handled to not fail parsing
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} else if (strcmp(key, "Type") == 0) {
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if (strcmp(value, "Fixed") == 0) {
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subdir->type = FIXED;
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@ -171,20 +174,28 @@ static int entry_handler(char *group, char *key, char *value,
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} else if (strcmp(value, "Threshold") == 0) {
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subdir->type = THRESHOLD;
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} else {
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return true;
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return "invalid value - expected 'Fixed', 'Scalable' or 'Threshold'";
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}
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return NULL;
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}
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char *end;
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int n = strtol(value, &end, 10);
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if (*end != '\0') {
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return "invalid value - expected a number";
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}
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if (strcmp(key, "Size") == 0) {
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subdir->size = n;
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} else if (strcmp(key, "MaxSize") == 0) {
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subdir->max_size = n;
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return *end != '\0';
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} else if (strcmp(key, "MinSize") == 0) {
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subdir->min_size = n;
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return *end != '\0';
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} else if (strcmp(key, "Threshold") == 0) {
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subdir->threshold = n;
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return *end != '\0';
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} // Ignored: Scale, Applications
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} // Ignored: Scale
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}
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return false;
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return NULL;
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}
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/*
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@ -215,12 +226,16 @@ static struct icon_theme *read_theme_file(char *basedir, char *theme_name) {
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}
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theme->subdirs = create_list();
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bool error = false;
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char *group = NULL;
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list_t *groups = create_list();
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const char *error = NULL;
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int line_no = 0;
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char *full_line = NULL;
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size_t full_len = 0;
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ssize_t nread;
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while ((nread = getline(&full_line, &full_len, theme_file)) != -1) {
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++line_no;
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char *line = full_line - 1;
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while (isspace(*++line)) {} // remove leading whitespace
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if (!*line || line[0] == '#') continue; // ignore blank lines & comments
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@ -231,37 +246,42 @@ static struct icon_theme *read_theme_file(char *basedir, char *theme_name) {
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if (line[0] == '[') { // group header
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// check well-formed
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if (line[--len] != ']') {
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error = true;
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break;
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}
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int i = 1;
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for (; !iscntrl(line[i]) && line[i] != '[' && line[i] != ']'; ++i) {}
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if (i < len) {
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error = true;
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if (i != --len || line[i] != ']') {
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error = "malformed group header";
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break;
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}
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line[len] = '\0';
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// check group is not duplicate
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if (list_seq_find(groups, cmp_id, &line[1]) != -1) {
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error = "duplicate group";
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break;
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}
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// call handler
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line[len] = '\0';
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error = group_handler(group, &line[1], theme);
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char *last_group = groups->length > 0 ? groups->items[groups->length - 1] : NULL;
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error = group_handler(last_group, &line[1], theme);
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if (error) {
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break;
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}
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free(group);
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group = strdup(&line[1]);
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list_add(groups, strdup(&line[1]));
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} else { // key-value pair
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if (!group) {
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error = true;
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if (groups->length == 0) {
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error = "unexpected content before first header";
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break;
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}
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// check well-formed
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int eok = 0;
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for (; isalnum(line[eok]) || line[eok] == '-'; ++eok) {} // TODO locale?
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int i = eok - 1;
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while (isspace(line[++i])) {}
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if (line[i] != '=') {
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error = true;
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error = "malformed key-value pair";
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break;
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}
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@ -269,28 +289,38 @@ static struct icon_theme *read_theme_file(char *basedir, char *theme_name) {
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char *value = &line[i];
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while (isspace(*++value)) {}
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// TODO unescape value
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error = entry_handler(group, line, value, theme);
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error = entry_handler(groups->items[groups->length - 1], line,
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value, theme);
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if (error) {
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break;
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}
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}
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}
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if (!error && group) {
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error = group_handler(group, NULL, theme);
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if (!error) {
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if (groups->length > 0) {
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error = group_handler(groups->items[groups->length - 1], NULL, theme);
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} else {
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error = "empty file";
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}
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}
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free(group);
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free(full_line);
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fclose(theme_file);
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if (!error && validate_icon_theme(theme)) {
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if (!error) {
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theme->dir = strdup(theme_name);
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return theme;
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} else {
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char *last_group = groups->length > 0 ? groups->items[groups->length-1] : "n/a";
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sway_log(SWAY_DEBUG, "Failed to load theme '%s' - parsing of file "
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"'%s/%s/index.theme' failed on line %d (group '%s'): %s",
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theme_name, basedir, theme_name, line_no, last_group, error);
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destroy_theme(theme);
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return NULL;
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theme = NULL;
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}
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free(full_line);
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list_free_items_and_destroy(groups);
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fclose(theme_file);
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return theme;
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}
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static list_t *load_themes_in_dir(char *basedir) {
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