115 lines
3.8 KiB
Diff
115 lines
3.8 KiB
Diff
From 4ad7120d0188dcf21146da02637f82bac2ac7ad6 Mon Sep 17 00:00:00 2001
|
|
From: =?UTF-8?q?Florian=20M=C3=BCllner?= <fmuellner@gnome.org>
|
|
Date: Wed, 29 Jan 2025 02:46:44 +0100
|
|
Subject: [PATCH] st/theme: Reuse stylesheets if possible
|
|
|
|
The following happens when processing an `@import()` rule:
|
|
|
|
1. `_st_theme_resolve_url()` to resolve file
|
|
2. `insert_stylesheet()` to track file/sheet
|
|
a. take ownership of file/sheet (ref)
|
|
b. use file as key in `stylesheets_by_file` hash table
|
|
c. use file as value in `files_by_stylesheet` hash table
|
|
3. release reference to file
|
|
|
|
This leads to a refcount error when importing a file that
|
|
was already parsed before:
|
|
|
|
1. file start with refcount 1
|
|
2. `insert_stylesheet()`
|
|
a. increases refcount to 2
|
|
b. inserting into `stylesheets_by_file` *decreases* the
|
|
passed-in key if the key already exists
|
|
c. `files_by_stylesheet` now tracks a file with recount 1
|
|
3. releases the last reference to file
|
|
|
|
The file object tracked in `files_by_stylesheet` is now invalid,
|
|
and accessing it results in a crash.
|
|
|
|
Avoid this issue by reusing existing stylesheets, so we don't insert
|
|
a stylesheet that's already tracked.
|
|
|
|
As a side-effect, this also saves us from re-parsing the same file
|
|
unnecessarily.
|
|
|
|
Closes: https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/7306
|
|
---
|
|
src/st/st-theme.c | 32 ++++++++++++++++++++++++++------
|
|
1 file changed, 26 insertions(+), 6 deletions(-)
|
|
|
|
diff --git a/src/st/st-theme.c b/src/st/st-theme.c
|
|
index 9867ee1510..9ad99e2b1a 100644
|
|
--- a/src/st/st-theme.c
|
|
+++ b/src/st/st-theme.c
|
|
@@ -244,6 +244,27 @@ insert_stylesheet (StTheme *theme,
|
|
g_hash_table_insert (theme->files_by_stylesheet, stylesheet, file);
|
|
}
|
|
|
|
+static CRStyleSheet *
|
|
+resolve_stylesheet (StTheme *theme,
|
|
+ GFile *file,
|
|
+ GError **error)
|
|
+{
|
|
+ CRStyleSheet *sheet;
|
|
+
|
|
+ sheet = g_hash_table_lookup (theme->stylesheets_by_file, file);
|
|
+ if (sheet)
|
|
+ {
|
|
+ cr_stylesheet_ref (sheet);
|
|
+ return sheet;
|
|
+ }
|
|
+
|
|
+ sheet = parse_stylesheet (file, error);
|
|
+ if (sheet)
|
|
+ insert_stylesheet (theme, file, sheet);
|
|
+
|
|
+ return sheet;
|
|
+}
|
|
+
|
|
/**
|
|
* st_theme_load_stylesheet:
|
|
* @theme: a #StTheme
|
|
@@ -261,13 +282,12 @@ st_theme_load_stylesheet (StTheme *theme,
|
|
{
|
|
CRStyleSheet *stylesheet;
|
|
|
|
- stylesheet = parse_stylesheet (file, error);
|
|
+ stylesheet = resolve_stylesheet (theme, file, error);
|
|
if (!stylesheet)
|
|
return FALSE;
|
|
|
|
stylesheet->app_data = GUINT_TO_POINTER (TRUE);
|
|
|
|
- insert_stylesheet (theme, file, stylesheet);
|
|
cr_stylesheet_ref (stylesheet);
|
|
theme->custom_stylesheets = g_slist_prepend (theme->custom_stylesheets, stylesheet);
|
|
g_signal_emit (theme, signals[STYLESHEETS_CHANGED], 0);
|
|
@@ -884,6 +904,7 @@ add_matched_properties (StTheme *a_this,
|
|
|
|
if (import_rule->sheet == NULL)
|
|
{
|
|
+ CRStyleSheet *sheet = NULL;
|
|
GFile *file = NULL;
|
|
|
|
if (import_rule->url->stryng && import_rule->url->stryng->str)
|
|
@@ -891,13 +912,12 @@ add_matched_properties (StTheme *a_this,
|
|
file = _st_theme_resolve_url (a_this,
|
|
a_nodesheet,
|
|
import_rule->url->stryng->str);
|
|
- import_rule->sheet = parse_stylesheet (file, NULL);
|
|
+ sheet = resolve_stylesheet (a_this, file, NULL);
|
|
}
|
|
|
|
- if (import_rule->sheet)
|
|
+ if (sheet)
|
|
{
|
|
- insert_stylesheet (a_this, file, import_rule->sheet);
|
|
- /* refcount of stylesheets starts off at zero, so we don't need to unref! */
|
|
+ import_rule->sheet = sheet;
|
|
}
|
|
else
|
|
{
|
|
--
|
|
2.48.1
|
|
|