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Fix pango escaping and refactor escape_markup_text

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Fixes #2674.

The cause of the issue was in get_pango_layout. When we call
pango_parse_markup, `text` is the escaped string, and the unescaped
string is then computed and written to `buf`. We were then passing the
unescaped string to pango_layout_set_markup, but this function needs the
escaped string. `buf` is not needed and has been removed.

The other part of this PR refactors escape_markup_text to remove the
dest_length argument and removes the -1 return value on error. It now
assumes that you've allocated dest to the correct length.
This commit is contained in:
Ryan Dwyer 2018-09-21 21:27:36 +10:00
parent fe7e66407c
commit 10ef118e09
3 changed files with 24 additions and 56 deletions
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14
include/pango.h
View file

@ -6,17 +6,13 @@
#include <cairo/cairo.h>
#include <pango/pangocairo.h>
/* Utility function which escape characters a & < > ' ".
/**
* Utility function which escape characters a & < > ' ".
*
* If the dest parameter is NULL, then the function returns the length of
* of the escaped src string. The dest_length doesn't matter.
*
* If the dest parameter is not NULL then the fuction escapes the src string
* an puts the escaped string in dest and returns the lenght of the escaped string.
* The dest_length parameter is the size of dest array. If the size of dest is not
* enough, then the function returns -1.
* The function returns the length of the escaped string, optionally writing the
* escaped string to dest if provided.
*/
int escape_markup_text(const char *src, char *dest, int dest_length);
size_t escape_markup_text(const char *src, char *dest);
PangoLayout *get_pango_layout(cairo_t *cairo, const char *font,
const char *text, double scale, bool markup);
void get_text_size(cairo_t *cairo, const char *font, int *width, int *height,