@font-face support. Credit: James Montgomerie

Things missing: parser tests; the following descriptors: font-feature-settings, font-stretch, font-variant, unicode-range.

svn path=/trunk/libcss/; revision=13244

1 files changed, 251 insertions, 0 deletions

diff --git a/src/select/font_face.c b/src/select/font_face.c
new file mode 100644
index 0000000..ae24827
--- /dev/null
+++ b/src/select/font_face.c
@@ -0,0 +1,251 @@
+/*
+ * This file is part of LibCSS.
+ * Licensed under the MIT License,
+ *                http://www.opensource.org/licenses/mit-license.php
+ * Copyright 2011 Things Made Out Of Other Things Ltd.
+ * Written by James Montgomerie <jamie@th.ingsmadeoutofotherthin.gs>
+ */
+
+#include <string.h>
+
+#include "select/font_face.h"
+
+static void font_faces_srcs_destroy(css_font_face *font_face)
+{
+	uint32_t i;
+	css_font_face_src *srcs = font_face->srcs;
+
+	for (i = 0; i < font_face->n_srcs; ++i) {
+		if (srcs[i].location != NULL) {
+			lwc_string_unref(srcs[i].location);
+		}
+	}
+	
+	font_face->alloc(srcs, 0, font_face->pw);
+	font_face->srcs = NULL;
+}
+
+/**
+ * Create a font-face
+ *
+ * \param alloc   Memory (de)allocation function
+ * \param pw      Pointer to client-specific data
+ * \param result  Pointer to location to receive result
+ * \return CSS_OK on success,
+ *         CSS_NOMEM on memory exhaustion,
+ *         CSS_BADPARM on bad parameters.
+ */
+css_error css__font_face_create(css_allocator_fn alloc, void *pw,
+		css_font_face **result)
+{
+	css_font_face *f;
+	
+	if (alloc == NULL || result == NULL)
+		return CSS_BADPARM;
+	
+	f = alloc(NULL, sizeof(css_font_face), pw);
+	if (f == NULL)
+		return CSS_NOMEM;
+	
+	memset(f, 0, sizeof(css_font_face));
+	
+	f->alloc = alloc;
+	f->pw = pw;
+	
+	*result = f;
+	
+	return CSS_OK;
+}
+
+/**
+ * Destroy a font-face
+ *
+ * \param font_face  Font-face to destroy
+ * \return CSS_OK on success, appropriate error otherwise
+ */
+css_error css__font_face_destroy(css_font_face *font_face)
+{	
+	if (font_face == NULL)
+		return CSS_BADPARM;
+
+	if (font_face->font_family != NULL)
+		lwc_string_unref(font_face->font_family);
+	
+	if (font_face->srcs != NULL)
+		font_faces_srcs_destroy(font_face);
+
+	font_face->alloc(font_face, 0, font_face->pw);
+	
+	return CSS_OK;
+}
+
+
+/**
+ * Set a font-face's font-family name
+ *
+ * \param font_face    The font-face
+ * \param font_family  Font-family name
+ * \param result       Pointer to location to receive result
+ * \return CSS_OK on success,
+ *         CSS_BADPARM on bad parameters.
+ */
+css_error css__font_face_set_font_family(css_font_face *font_face,
+		lwc_string *font_family)
+{
+	if (font_face == NULL || font_family == NULL)
+		return CSS_BADPARM;
+	
+	if (font_face->font_family != NULL)
+		lwc_string_unref(font_face->font_family);
+		
+	font_face->font_family = lwc_string_ref(font_family);
+
+	return CSS_OK;
+}
+
+/**
+ * Get a font-face's font-family name
+ *
+ * \param font_face  The font-face
+ * \param result     Pointer to location to receive result
+ * \return CSS_OK on success,
+ *         CSS_BADPARM on bad parameters.
+ */
+css_error css_font_face_get_font_family(const css_font_face *font_face,
+		lwc_string **font_family)
+{
+	if (font_face == NULL || font_family == NULL)
+		return CSS_BADPARM;
+	
+	*font_family = font_face->font_family;
+	
+	return CSS_OK;
+}
+
+/**
+ * Get the style of font for a font-face.
+ *
+ * \param src  The font-face
+ * \return The style, as a css_font_style_e
+ */
+uint8_t css_font_face_font_style(const css_font_face *font_face)
+{
+	return font_face->bits[0] & 0x3;
+}
+
+/**
+ * Get the weight of font for a font-face.
+ *
+ * \param src  The font-face
+ * \return The style, as a css_font_weight_e
+ */
+uint8_t css_font_face_font_weight(const css_font_face *font_face)
+{
+	return (font_face->bits[0] >> 2) & 0xf;
+}
+
+/**
+ * Get the number of potential src locations for a font-face
+ *
+ * \param font_face  The font-face
+ * \param count      Pointer to location to receive result
+ * \return CSS_OK on success,
+ *         CSS_BADPARM on bad parameters.
+ */
+css_error css_font_face_count_srcs(const css_font_face *font_face, 
+		uint32_t *count)
+{
+	if (font_face == NULL || count == NULL)
+		return CSS_BADPARM;
+
+	*count = font_face->n_srcs;
+	return CSS_OK;
+}
+
+/**
+ * Get a specific src location from a font-face
+ *
+ * \param font_face  The font-face
+ * \param index	     The index for the wanted src.
+ * \param count      Pointer to location to receive result
+ * \return CSS_OK on success,
+ *         CSS_BADPARM on bad parameters.
+ */
+css_error css_font_face_get_src(const css_font_face *font_face,
+		uint32_t index, const css_font_face_src **src)
+{
+	if (font_face == NULL || src == NULL || index >= font_face->n_srcs)
+		return CSS_BADPARM;
+
+	*src = &(font_face->srcs[index]);
+	
+	return CSS_OK;
+}
+
+/**
+ * Get the location for a font-face src.
+ *
+ * \param font_face  The font-face
+ * \param count      Pointer to location to receive result
+ * \return CSS_OK on success,
+ *         CSS_BADPARM on bad parameters.
+ *
+ * \note  The type of location (local or URL) can be gathered from 
+ *        css_font_face_src_location_type, and the format of font (if specified)
+ *        from css_font_face_src_format.
+ */
+css_error css_font_face_src_get_location(const css_font_face_src *src,
+		lwc_string **location)
+{
+	if (src == NULL || location == NULL) 
+		return CSS_BADPARM;
+	
+	*location = src->location;
+
+	return CSS_OK;	
+}
+
+/**
+ * Get the location type for a font-face src.
+ *
+ * \param src  The font-face src
+ * \return The location type
+ */
+css_font_face_location_type css_font_face_src_location_type(
+		const css_font_face_src *src)
+{
+	return src->bits[0] & 0x3;
+}
+
+/**
+ * Get the format of font for a font-face src.
+ *
+ * \param src  The font-face src
+ * \return The format, if specified
+ */
+css_font_face_format css_font_face_src_format(const css_font_face_src *src)
+{
+	return (src->bits[0] >> 2) & 0x1f;
+}
+
+/**
+ * Set a font-faces array of srcs.
+ *
+ * \param font_face  The font-face 
+ * \param srcs	     The array of css_font_face_srcs
+ * \param n_srcs     The count of css_font_face_srcs in the array 
+ * \return The format, if specified
+ */
+css_error css__font_face_set_srcs(css_font_face *font_face,
+		css_font_face_src *srcs, uint32_t n_srcs)
+{
+	if (font_face->srcs != NULL)
+		font_faces_srcs_destroy(font_face);
+	
+	font_face->srcs = srcs;
+	font_face->n_srcs = n_srcs;
+	
+	return CSS_OK;
+}
+
+