1 files changed, 96 insertions, 0 deletions
diff --git a/monkey/font.c b/monkey/font.c
new file mode 100644
index 000000000..759c3e935
--- /dev/null
+++ b/monkey/font.c
@@ -0,0 +1,96 @@
+/*
+ * Copyright 2011 Daniel Silverstone <dsilvers@digital-scurf.org>
+ *
+ * This file is part of NetSurf, http://www.netsurf-browser.org/
+ *
+ * NetSurf is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * NetSurf is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "css/css.h"
+#include "render/font.h"
+#include "desktop/options.h"
+#include "utils/utf8.h"
+
+
+static bool nsfont_width(const plot_font_style_t *fstyle,
+                         const char *string, size_t length,
+                         int *width)
+{
+  *width = (fstyle->size * utf8_bounded_length(string, length)) / FONT_SIZE_SCALE;
+  return true;
+}
+
+/**
+ * Find the position in a string where an x coordinate falls.
+ *
+ * \param  fstyle       style for this text
+ * \param  string       UTF-8 string to measure
+ * \param  length       length of string
+ * \param  x            x coordinate to search for
+ * \param  char_offset  updated to offset in string of actual_x, [0..length]
+ * \param  actual_x     updated to x coordinate of character closest to x
+ * \return  true on success, false on error and error reported
+ */
+
+static bool nsfont_position_in_string(const plot_font_style_t *fstyle,
+		const char *string, size_t length,
+		int x, size_t *char_offset, int *actual_x)
+{
+  *char_offset = x / (fstyle->size / FONT_SIZE_SCALE);
+  if (*char_offset > length)
+    *char_offset = length;
+  *actual_x = *char_offset * (fstyle->size / FONT_SIZE_SCALE);
+  return true;
+}
+
+
+/**
+ * Find where to split a string to make it fit a width.
+ *
+ * \param  fstyle       style for this text
+ * \param  string       UTF-8 string to measure
+ * \param  length       length of string
+ * \param  x            width available
+ * \param  char_offset  updated to offset in string of actual_x, [0..length]
+ * \param  actual_x     updated to x coordinate of character closest to x
+ * \return  true on success, false on error and error reported
+ *
+ * On exit, [char_offset == 0 ||
+ *           string[char_offset] == ' ' ||
+ *           char_offset == length]
+ */
+
+static bool nsfont_split(const plot_font_style_t *fstyle,
+		const char *string, size_t length,
+		int x, size_t *char_offset, int *actual_x)
+{
+
+  *char_offset = x / (fstyle->size / FONT_SIZE_SCALE);
+  if (*char_offset > length) {
+    *char_offset = length;
+  } else {
+    while (*char_offset > 0) {
+      if (string[*char_offset] == ' ')
+        break;
+      (*char_offset)--;
+    }
+  }
+  *actual_x = *char_offset * (fstyle->size / FONT_SIZE_SCALE);
+  return true;
+}
+
+const struct font_functions nsfont = {
+	nsfont_width,
+	nsfont_position_in_string,
+	nsfont_split
+};