From 75605491a54f8647740fdba75dd2ad7bae9e0ca7 Mon Sep 17 00:00:00 2001 From: Hugo Osvaldo Barrera Date: Wed, 29 Jun 2022 21:38:24 +0200 Subject: Reject font values that are invalid for pango Use pango to parse font configuration early, and reject the command as invalid if the value is invalid for pango. Since we're already parsing the font into a `PangoFontDescription`, keep that instance around and avoid re-parsing the font each time we render text. Fixes: https://github.com/swaywm/sway/issues/6805 --- sway/commands/font.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) (limited to 'sway/commands') diff --git a/sway/commands/font.c b/sway/commands/font.c index 3eda0a9c..74bb6b9f 100644 --- a/sway/commands/font.c +++ b/sway/commands/font.c @@ -4,6 +4,7 @@ #include "sway/config.h" #include "log.h" #include "stringop.h" +#include struct cmd_results *cmd_font(int argc, char **argv) { struct cmd_results *error = NULL; @@ -22,6 +23,28 @@ struct cmd_results *cmd_font(int argc, char **argv) { config->font = font; } + // Parse the font early so we can reject it if it's not valid for pango. + // Also avoids re-parsing each time we render text. + PangoFontDescription *font_description = pango_font_description_from_string(config->font); + + const char *family = pango_font_description_get_family(font_description); + if (family == NULL) { + pango_font_description_free(font_description); + return cmd_results_new(CMD_FAILURE, "Invalid font family."); + } + + const gint size = pango_font_description_get_size(font_description); + if (size == 0) { + pango_font_description_free(font_description); + return cmd_results_new(CMD_FAILURE, "Invalid font size."); + } + + if (config->font_description != NULL) { + pango_font_description_free(config->font_description); + } + + config->font_description = font_description; config_update_font_height(); + return cmd_results_new(CMD_SUCCESS, NULL); } -- cgit v1.2.3