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-rw-r--r--frontends/riscos/font.c598
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diff --git a/frontends/riscos/font.c b/frontends/riscos/font.c
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+++ b/frontends/riscos/font.c
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+/*
+ * Copyright 2006 James Bursa <bursa@users.sourceforge.net>
+ *
+ * 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/>.
+ */
+
+/**
+ * \file
+ * RISC OS implementation of Font handling.
+ *
+ * The RUfl is used to handle and render fonts.
+ */
+
+#include "utils/config.h"
+
+#include <assert.h>
+#include <string.h>
+#include <oslib/wimp.h>
+#include <oslib/wimpreadsysinfo.h>
+
+#include "utils/nsoption.h"
+#include "utils/log.h"
+#include "utils/messages.h"
+#include "utils/utils.h"
+#include "desktop/gui_layout.h"
+
+#include "riscos/gui.h"
+#include "riscos/font.h"
+
+
+/** desktop font, size and style being used */
+char ro_gui_desktop_font_family[80];
+int ro_gui_desktop_font_size = 12;
+rufl_style ro_gui_desktop_font_style = rufl_WEIGHT_400;
+bool no_font_blending = false;
+
+
+/**
+ * Check that at least Homerton.Medium is available.
+ */
+static void nsfont_check_fonts(void)
+{
+ char s[252];
+ font_f font;
+ os_error *error;
+
+ error = xfont_find_font("Homerton.Medium\\ELatin1",
+ 160, 160, 0, 0, &font, 0, 0);
+ if (error) {
+ if (error->errnum == error_FILE_NOT_FOUND) {
+ xwimp_start_task("TaskWindow -wimpslot 200K -quit "
+ "<NetSurf$Dir>.FixFonts", 0);
+ die("FontBadInst");
+ } else {
+ LOG("xfont_find_font: 0x%x: %s", error->errnum, error->errmess);
+ snprintf(s, sizeof s, messages_get("FontError"),
+ error->errmess);
+ die(s);
+ }
+ }
+
+ error = xfont_lose_font(font);
+ if (error) {
+ LOG("xfont_lose_font: 0x%x: %s", error->errnum, error->errmess);
+ snprintf(s, sizeof s, messages_get("FontError"),
+ error->errmess);
+ die(s);
+ }
+}
+
+
+/**
+ * Check that a font option is valid, and fix it if not.
+ *
+ * \param option pointer to option, as used by options.[ch]
+ * \param family font family to use if option is not set, or the set
+ * family is not available
+ * \param fallback font family to use if family is not available either
+ */
+static void nsfont_check_option(char **option, const char *family,
+ const char *fallback)
+{
+ if (*option && !nsfont_exists(*option)) {
+ free(*option);
+ *option = 0;
+ }
+ if (!*option) {
+ if (nsfont_exists(family))
+ *option = strdup(family);
+ else
+ *option = strdup(fallback);
+ }
+}
+
+
+/**
+ * Initialize font handling.
+ *
+ * Exits through die() on error.
+ */
+void nsfont_init(void)
+{
+ const char *fallback;
+ rufl_code code;
+
+ nsfont_check_fonts();
+
+ LOG("Initialise RUfl");
+ code = rufl_init();
+ if (code != rufl_OK) {
+ if (code == rufl_FONT_MANAGER_ERROR)
+ LOG("rufl_init: rufl_FONT_MANAGER_ERROR: 0x%x: %s", rufl_fm_error->errnum, rufl_fm_error->errmess);
+ else
+ LOG("rufl_init: 0x%x", code);
+ die("The Unicode font library could not be initialized. "
+ "Please report this to the developers.");
+ }
+ LOG("RUfl initialised");
+
+ if (rufl_family_list_entries == 0)
+ die("No fonts could be found. At least one font must be "
+ "installed.");
+
+ fallback = nsfont_fallback_font();
+
+ nsfont_check_option(&nsoption_charp(font_sans), "Homerton", fallback);
+ nsfont_check_option(&nsoption_charp(font_serif), "Trinity", fallback);
+ nsfont_check_option(&nsoption_charp(font_mono), "Corpus", fallback);
+ nsfont_check_option(&nsoption_charp(font_cursive), "Churchill", fallback);
+ nsfont_check_option(&nsoption_charp(font_fantasy), "Sassoon", fallback);
+
+ if (nsoption_int(font_default) != PLOT_FONT_FAMILY_SANS_SERIF &&
+ nsoption_int(font_default) != PLOT_FONT_FAMILY_SERIF &&
+ nsoption_int(font_default) != PLOT_FONT_FAMILY_MONOSPACE &&
+ nsoption_int(font_default) != PLOT_FONT_FAMILY_CURSIVE &&
+ nsoption_int(font_default) != PLOT_FONT_FAMILY_FANTASY) {
+ nsoption_set_int(font_default, PLOT_FONT_FAMILY_SANS_SERIF);
+ }
+}
+
+
+/**
+ * Retrieve the fallback font name
+ *
+ * \return Fallback font name
+ */
+const char *nsfont_fallback_font(void)
+{
+ const char *fallback = "Homerton";
+
+ if (!nsfont_exists(fallback)) {
+ LOG("Homerton not found, dumping RUfl family list");
+ for (unsigned int i = 0; i < rufl_family_list_entries; i++) {
+ LOG("'%s'", rufl_family_list[i]);
+ }
+ fallback = rufl_family_list[0];
+ }
+
+ return fallback;
+}
+
+
+/**
+ * bsearch comparison routine
+ */
+static int nsfont_list_cmp(const void *keyval, const void *datum)
+{
+ const char *key = keyval;
+ const char * const *entry = datum;
+ return strcasecmp(key, *entry);
+}
+
+
+/**
+ * Check if a font family is available.
+ *
+ * \param font_family name of font family
+ * \return true if the family is available
+ */
+bool nsfont_exists(const char *font_family)
+{
+ if (bsearch(font_family, rufl_family_list,
+ rufl_family_list_entries, sizeof rufl_family_list[0],
+ nsfont_list_cmp))
+ return true;
+ return false;
+}
+
+
+/**
+ * Measure the width of a string.
+ *
+ * \param fstyle plot style for this text
+ * \param string UTF-8 string to measure
+ * \param length length of string
+ * \param width updated to width of string[0..length)
+ * \return true on success, false on error and error reported
+ */
+static nserror
+ro_font_width(const plot_font_style_t *fstyle,
+ const char *string, size_t length,
+ int *width)
+{
+ const char *font_family;
+ unsigned int font_size;
+ rufl_style font_style;
+ rufl_code code;
+
+ nsfont_read_style(fstyle, &font_family, &font_size, &font_style);
+ if (font_size == 0) {
+ *width = 0;
+ return NSERROR_OK;
+ }
+
+ code = rufl_width(font_family, font_style, font_size,
+ string, length,
+ width);
+ if (code != rufl_OK) {
+ if (code == rufl_FONT_MANAGER_ERROR)
+ LOG("rufl_width: rufl_FONT_MANAGER_ERROR: 0x%x: %s", rufl_fm_error->errnum, rufl_fm_error->errmess);
+ else
+ LOG("rufl_width: 0x%x", code);
+/* ro_warn_user("MiscError", "font error"); */
+ *width = 0;
+ return NSERROR_INVALID;
+ }
+
+ *width /= 2;
+ return NSERROR_OK;
+}
+
+
+/**
+ * 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 nserror
+ro_font_position(const plot_font_style_t *fstyle,
+ const char *string, size_t length,
+ int x, size_t *char_offset, int *actual_x)
+{
+ const char *font_family;
+ unsigned int font_size;
+ rufl_style font_style;
+ rufl_code code;
+
+ nsfont_read_style(fstyle, &font_family, &font_size, &font_style);
+ if (font_size == 0) {
+ *char_offset = 0;
+ *actual_x = 0;
+ return NSERROR_OK;
+ }
+
+ code = rufl_x_to_offset(font_family, font_style, font_size,
+ string, length,
+ x * 2, char_offset, actual_x);
+ if (code != rufl_OK) {
+ if (code == rufl_FONT_MANAGER_ERROR)
+ LOG("rufl_x_to_offset: rufl_FONT_MANAGER_ERROR: ""0x%x: %s", rufl_fm_error->errnum, rufl_fm_error->errmess);
+ else
+ LOG("rufl_x_to_offset: 0x%x", code);
+/* ro_warn_user("MiscError", "font error"); */
+ *char_offset = 0;
+ *actual_x = 0;
+ return NSERROR_INVALID;
+ }
+
+ *actual_x /= 2;
+
+ return NSERROR_OK;
+}
+
+
+/**
+ * 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, in bytes
+ * \param x width available
+ * \param char_offset updated to offset in string of actual_x, [1..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 indicates first character after split point.
+ *
+ * Note: char_offset of 0 should never be returned.
+ *
+ * Returns:
+ * char_offset giving split point closest to x, where actual_x <= x
+ * else
+ * char_offset giving split point closest to x, where actual_x > x
+ *
+ * Returning char_offset == length means no split possible
+ */
+static nserror
+ro_font_split(const plot_font_style_t *fstyle,
+ const char *string, size_t length,
+ int x, size_t *char_offset, int *actual_x)
+{
+ const char *font_family;
+ unsigned int font_size;
+ rufl_style font_style;
+ rufl_code code;
+
+ nsfont_read_style(fstyle, &font_family, &font_size, &font_style);
+ if (font_size == 0) {
+ *char_offset = 0;
+ *actual_x = 0;
+ return NSERROR_OK;
+ }
+
+ code = rufl_split(font_family, font_style, font_size,
+ string, length,
+ x * 2, char_offset, actual_x);
+ if (code != rufl_OK) {
+ if (code == rufl_FONT_MANAGER_ERROR) {
+ LOG("rufl_split: rufl_FONT_MANAGER_ERROR: ""0x%x: %s",
+ rufl_fm_error->errnum, rufl_fm_error->errmess);
+ } else {
+ LOG("rufl_split: 0x%x", code);
+ }
+/* ro_warn_user("MiscError", "font error"); */
+ *char_offset = 0;
+ *actual_x = 0;
+ return NSERROR_INVALID;
+ }
+
+ if (*char_offset != length) {
+ /* we found something to split at */
+ size_t orig = *char_offset;
+
+ /* ensure a space at <= the split point we found */
+ while (*char_offset && string[*char_offset] != ' ') {
+ (*char_offset)--;
+ }
+
+ /* nothing valid found <= split point, advance to next space */
+ if (*char_offset == 0) {
+ *char_offset = orig;
+ while ((*char_offset != length) &&
+ (string[*char_offset] != ' ')) {
+ (*char_offset)++;
+ }
+ }
+ }
+
+ code = rufl_width(font_family, font_style, font_size,
+ string, *char_offset,
+ actual_x);
+ if (code != rufl_OK) {
+ if (code == rufl_FONT_MANAGER_ERROR) {
+ LOG("rufl_width: rufl_FONT_MANAGER_ERROR: 0x%x: %s",
+ rufl_fm_error->errnum, rufl_fm_error->errmess);
+ } else {
+ LOG("rufl_width: 0x%x", code);
+ }
+/* ro_warn_user("MiscError", "font error"); */
+ *char_offset = 0;
+ *actual_x = 0;
+ return NSERROR_INVALID;
+ }
+
+ *actual_x /= 2;
+ return NSERROR_OK;
+}
+
+
+/**
+ * Paint a string.
+ *
+ * \param fstyle plot style for this text
+ * \param string UTF-8 string to measure
+ * \param length length of string
+ * \param x x coordinate
+ * \param y y coordinate
+ * \return true on success, false on error and error reported
+ */
+bool nsfont_paint(const plot_font_style_t *fstyle, const char *string,
+ size_t length, int x, int y)
+{
+ const char *font_family;
+ unsigned int font_size;
+ unsigned int flags = rufl_BLEND_FONT;
+ rufl_style font_style;
+ rufl_code code;
+
+ nsfont_read_style(fstyle, &font_family, &font_size, &font_style);
+ if (font_size == 0)
+ return true;
+
+ if (no_font_blending || print_active)
+ flags = 0;
+
+ code = rufl_paint(font_family, font_style, font_size,
+ string, length, x, y, flags);
+ if (code != rufl_OK) {
+ if (code == rufl_FONT_MANAGER_ERROR) {
+ LOG("rufl_paint: rufl_FONT_MANAGER_ERROR: 0x%x: %s", rufl_fm_error->errnum, rufl_fm_error->errmess);
+ } else {
+ LOG("rufl_paint: 0x%x", code);
+ }
+ }
+
+ return true;
+}
+
+
+/**
+ * Convert a font style to a font family, size and rufl_style.
+ *
+ * \param fstyle plot style for this text
+ * \param font_family updated to font family
+ * \param font_size updated to font size
+ * \param font_style updated to font style
+ */
+void nsfont_read_style(const plot_font_style_t *fstyle,
+ const char **font_family, unsigned int *font_size,
+ rufl_style *font_style)
+{
+ static const rufl_style weight_table[] = {
+ rufl_WEIGHT_100,
+ rufl_WEIGHT_200,
+ rufl_WEIGHT_300,
+ rufl_WEIGHT_400,
+ rufl_WEIGHT_500,
+ rufl_WEIGHT_600,
+ rufl_WEIGHT_700,
+ rufl_WEIGHT_800,
+ rufl_WEIGHT_900
+ };
+
+ *font_size = (fstyle->size * 16) / FONT_SIZE_SCALE;
+ if (1600 < *font_size)
+ *font_size = 1600;
+
+ switch (fstyle->family) {
+ case PLOT_FONT_FAMILY_SANS_SERIF:
+ *font_family = nsoption_charp(font_sans);
+ break;
+ case PLOT_FONT_FAMILY_SERIF:
+ *font_family = nsoption_charp(font_serif);
+ break;
+ case PLOT_FONT_FAMILY_MONOSPACE:
+ *font_family = nsoption_charp(font_mono);
+ break;
+ case PLOT_FONT_FAMILY_CURSIVE:
+ *font_family = nsoption_charp(font_cursive);
+ break;
+ case PLOT_FONT_FAMILY_FANTASY:
+ *font_family = nsoption_charp(font_fantasy);
+ break;
+ default:
+ *font_family = nsoption_charp(font_sans);
+ break;
+ }
+
+ if ((fstyle->flags & FONTF_ITALIC) || (fstyle->flags & FONTF_OBLIQUE)) {
+ *font_style = rufl_SLANTED;
+ } else {
+ *font_style = 0;
+ }
+
+ *font_style |= weight_table[(fstyle->weight / 100) - 1];
+}
+
+
+/**
+ * Looks up the current desktop font and converts that to a family name,
+ * font size and style flags suitable for passing directly to rufl
+ *
+ * \param family buffer to receive font family
+ * \param family_size buffer size
+ * \param psize receives the font size in 1/16 points
+ * \param pstyle receives the style settings to be passed to rufl
+ */
+static void
+ro_gui_wimp_desktop_font(char *family,
+ size_t family_size,
+ int *psize,
+ rufl_style *pstyle)
+{
+ rufl_style style = rufl_WEIGHT_400;
+ os_error *error;
+ int ptx, pty;
+ font_f font_handle;
+ int used;
+
+ assert(family);
+ assert(20 < family_size);
+ assert(psize);
+ assert(pstyle);
+
+ error = xwimpreadsysinfo_font(&font_handle, NULL);
+ if (error) {
+ LOG("xwimpreadsysinfo_font: 0x%x: %s", error->errnum, error->errmess);
+ ro_warn_user("WimpError", error->errmess);
+ goto failsafe;
+ }
+
+ if (font_handle == font_SYSTEM) {
+ /* Er, yeah; like that's ever gonna work with RUfl */
+ goto failsafe;
+ }
+
+ error = xfont_read_identifier(font_handle, NULL, &used);
+ if (error) {
+ LOG("xfont_read_identifier: 0x%x: %s", error->errnum, error->errmess);
+ ro_warn_user("MiscError", error->errmess);
+ goto failsafe;
+ }
+
+ if (family_size < (size_t) used + 1) {
+ LOG("desktop font name too long");
+ goto failsafe;
+ }
+
+ error = xfont_read_defn(font_handle, (byte *) family,
+ &ptx, &pty, NULL, NULL, NULL, NULL);
+ if (error) {
+ LOG("xfont_read_defn: 0x%x: %s", error->errnum, error->errmess);
+ ro_warn_user("MiscError", error->errmess);
+ goto failsafe;
+ }
+
+ for (size_t i = 0; i != (size_t) used; i++) {
+ if (family[i] < ' ') {
+ family[i] = 0;
+ break;
+ }
+ }
+
+ LOG("desktop font \"%s\"", family);
+
+ if (strcasestr(family, ".Medium"))
+ style = rufl_WEIGHT_500;
+ else if (strcasestr(family, ".Bold"))
+ style = rufl_WEIGHT_700;
+ if (strcasestr(family, ".Italic") || strcasestr(family, ".Oblique"))
+ style |= rufl_SLANTED;
+
+ char *dot = strchr(family, '.');
+ if (dot)
+ *dot = 0;
+
+ *psize = max(ptx, pty);
+ *pstyle = style;
+
+ LOG("family \"%s\", size %i, style %i", family, *psize, style);
+
+ return;
+
+failsafe:
+ strcpy(family, "Homerton");
+ *psize = 12*16;
+ *pstyle = rufl_WEIGHT_400;
+}
+
+
+/**
+ * Retrieve the current desktop font family, size and style from
+ * the WindowManager in a form suitable for passing to rufl
+ */
+void ro_gui_wimp_get_desktop_font(void)
+{
+ ro_gui_wimp_desktop_font(ro_gui_desktop_font_family,
+ sizeof(ro_gui_desktop_font_family),
+ &ro_gui_desktop_font_size,
+ &ro_gui_desktop_font_style);
+}
+
+
+static struct gui_layout_table layout_table = {
+ .width = ro_font_width,
+ .position = ro_font_position,
+ .split = ro_font_split,
+};
+
+struct gui_layout_table *riscos_layout_table = &layout_table;