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inspector: fix a crash in the CSS editor

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gtk_css_section_get_end_position() can return a position one byte beyond
the end of the last line.

gtk_text_buffer_get_iter_at_line_index() accepts only valid
line_number/byte_index pairs. Another solution is to make the
GtkTextBuffer function less strict, by returning a boolean if the exact
position was found.

The CSS parser should also be fixed to always return valid positions.
But it's better to have a safety net in the CSS editor, just in case (a
warning could be print).

https://bugzilla.gnome.org/show_bug.cgi?id=735337
This commit is contained in:
Sébastien Wilmet 2014-08-24 20:27:13 +02:00
parent ec17a649ae
commit 6525a11b8d
1 changed files with 29 additions and 8 deletions
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37
gtk/inspector/css-editor.c
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@ -259,6 +259,27 @@ text_changed (GtkTextBuffer *buffer,
ce->priv->timeout = g_timeout_add (100, update_timeout, ce);
}
/* Safe version of gtk_text_buffer_get_iter_at_line_index(). */
static void
safe_get_iter_at_line_index (GtkTextBuffer *buffer,
GtkTextIter *iter,
gint line_number,
gint byte_index)
{
if (line_number >= gtk_text_buffer_get_line_count (buffer))
{
gtk_text_buffer_get_end_iter (buffer, iter);
return;
}
gtk_text_buffer_get_iter_at_line (buffer, iter, line_number);
if (byte_index < gtk_text_iter_get_bytes_in_line (iter))
gtk_text_iter_set_line_index (iter, byte_index);
else
gtk_text_iter_forward_to_line_end (iter);
}
static void
show_parsing_error (GtkCssProvider *provider,
GtkCssSection *section,
@ -269,14 +290,14 @@ show_parsing_error (GtkCssProvider *provider,
const char *tag_name;
GtkTextBuffer *buffer = GTK_TEXT_BUFFER (ce->priv->text);
gtk_text_buffer_get_iter_at_line_index (buffer,
&start,
gtk_css_section_get_start_line (section),
gtk_css_section_get_start_position (section));
gtk_text_buffer_get_iter_at_line_index (buffer,
&end,
gtk_css_section_get_end_line (section),
gtk_css_section_get_end_position (section));
safe_get_iter_at_line_index (buffer,
&start,
gtk_css_section_get_start_line (section),
gtk_css_section_get_start_position (section));
safe_get_iter_at_line_index (buffer,
&end,
gtk_css_section_get_end_line (section),
gtk_css_section_get_end_position (section));
if (g_error_matches (error, GTK_CSS_PROVIDER_ERROR, GTK_CSS_PROVIDER_ERROR_DEPRECATED))
tag_name = "warning";