/**
* Convert an absolute CSS length to points.
*
* \param length Length to convert
* \param unit Corresponding unit
* \return length in points
*/
css_fixed nscss_len2pt(css_fixed length, css_unit unit)
{
/* Length must not be relative */
assert(unit != CSS_UNIT_EM && unit != CSS_UNIT_EX);
switch (unit) {
/* We assume the screen and any other output has the same dpi */
/* 1in = DPIpx => 1px = (72/DPI)pt */
case CSS_UNIT_PX: return FDIV(FMUL(length, F_72), nscss_screen_dpi);
/* 1in = 72pt */
case CSS_UNIT_IN: return FMUL(length, F_72);
/* 1in = 2.54cm => 1cm = (72/2.54)pt */
case CSS_UNIT_CM: return FMUL(length,
FDIV(F_72, FLTTOFIX(2.54)));
/* 1in = 25.4mm => 1mm = (72/25.4)pt */
case CSS_UNIT_MM: return FMUL(length,
FDIV(F_72, FLTTOFIX(25.4)));
case CSS_UNIT_PT: return length;
/* 1pc = 12pt */
case CSS_UNIT_PC: return FMUL(length, INTTOFIX(12));
default: break;
}
return 0;
}
css_error compute_font_size(void *pw, const css_hint *parent, css_hint *size)
{
static css_hint_length sizes[] = {
{ FLTTOFIX(6.75), CSS_UNIT_PT },
{ FLTTOFIX(7.50), CSS_UNIT_PT },
{ FLTTOFIX(9.75), CSS_UNIT_PT },
{ FLTTOFIX(12.0), CSS_UNIT_PT },
{ FLTTOFIX(13.5), CSS_UNIT_PT },
{ FLTTOFIX(18.0), CSS_UNIT_PT },
{ FLTTOFIX(24.0), CSS_UNIT_PT }
};
const css_hint_length *parent_size;
UNUSED(pw);
/* Grab parent size, defaulting to medium if none */
if (parent == NULL) {
parent_size = &sizes[CSS_FONT_SIZE_MEDIUM - 1];
} else {
assert(parent->status == CSS_FONT_SIZE_DIMENSION);
assert(parent->data.length.unit != CSS_UNIT_EM);
assert(parent->data.length.unit != CSS_UNIT_EX);
parent_size = &parent->data.length;
}
assert(size->status != CSS_FONT_SIZE_INHERIT);
if (size->status < CSS_FONT_SIZE_LARGER) {
/* Keyword -- simple */
size->data.length = sizes[size->status - 1];
} else if (size->status == CSS_FONT_SIZE_LARGER) {
/** \todo Step within table, if appropriate */
size->data.length.value =
FMUL(parent_size->value, FLTTOFIX(1.2));
size->data.length.unit = parent_size->unit;
} else if (size->status == CSS_FONT_SIZE_SMALLER) {
/** \todo Step within table, if appropriate */
size->data.length.value =
FMUL(parent_size->value, FLTTOFIX(1.2));
size->data.length.unit = parent_size->unit;
} else if (size->data.length.unit == CSS_UNIT_EM ||
size->data.length.unit == CSS_UNIT_EX) {
size->data.length.value =
FMUL(size->data.length.value, parent_size->value);
if (size->data.length.unit == CSS_UNIT_EX) {
size->data.length.value = FMUL(size->data.length.value,
FLTTOFIX(0.6));
}
size->data.length.unit = parent_size->unit;
} else if (size->data.length.unit == CSS_UNIT_PCT) {
size->data.length.value = FDIV(FMUL(size->data.length.value,
parent_size->value), FLTTOFIX(100));
size->data.length.unit = parent_size->unit;
}
size->status = CSS_FONT_SIZE_DIMENSION;
return CSS_OK;
}
/**
* Convert a CSS length to pixels.
*
* \param length Length to convert
* \param unit Corresponding unit
* \param style Computed style applying to length. May be NULL if unit is
* neither em nor ex
* \return length in pixels
*/
css_fixed nscss_len2px(css_fixed length, css_unit unit,
const css_computed_style *style)
{
/* We assume the screen and ay other output has the same dpi */
css_fixed px_per_unit;
assert(style != NULL || (unit != CSS_UNIT_EM && unit != CSS_UNIT_EX));
switch (unit) {
case CSS_UNIT_EM:
case CSS_UNIT_EX:
{
css_fixed font_size = 0;
css_unit font_unit = CSS_UNIT_PT;
css_computed_font_size(style, &font_size, &font_unit);
/* Convert to points */
font_size = nscss_len2pt(font_size, font_unit);
/* Clamp to configured minimum */
if (font_size < FDIV(INTTOFIX(nsoption_int(font_min_size)), F_10)) {
font_size = FDIV(INTTOFIX(nsoption_int(font_min_size)), F_10);
}
/* Convert to pixels (manually, to maximise precision)
* 1in = 72pt => 1pt = (DPI/72)px */
px_per_unit = FDIV(FMUL(font_size, nscss_screen_dpi), F_72);
/* Scale ex units: we use a fixed ratio of 1ex = 0.6em */
if (unit == CSS_UNIT_EX)
px_per_unit = FMUL(px_per_unit, FLTTOFIX(0.6));
}
break;
case CSS_UNIT_PX:
px_per_unit = F_1;
break;
/* 1in = DPIpx */
case CSS_UNIT_IN:
px_per_unit = nscss_screen_dpi;
break;
/* 1in = 2.54cm => 1cm = (DPI/2.54)px */
case CSS_UNIT_CM:
px_per_unit = FDIV(nscss_screen_dpi, FLTTOFIX(2.54));
break;
/* 1in = 25.4mm => 1mm = (DPI/25.4)px */
case CSS_UNIT_MM:
px_per_unit = FDIV(nscss_screen_dpi, FLTTOFIX(25.4));
break;
/* 1in = 72pt => 1pt = (DPI/72)px */
case CSS_UNIT_PT:
px_per_unit = FDIV(nscss_screen_dpi, F_72);
break;
/* 1pc = 12pt => 1in = 6pc => 1pc = (DPI/6)px */
case CSS_UNIT_PC:
px_per_unit = FDIV(nscss_screen_dpi, INTTOFIX(6));
break;
default:
px_per_unit = 0;
break;
}
/* Ensure we round px_per_unit to the nearest whole number of pixels:
* the use of FIXTOINT() below will truncate. */
px_per_unit += F_0_5;
/* Calculate total number of pixels */
return FMUL(length, TRUNCATEFIX(px_per_unit));
}
/**
* Initialize GTK interface.
*/
static void gui_init(int argc, char** argv, char **respath)
{
char buf[PATH_MAX];
const char *addr = NETSURF_HOMEPAGE;
char *resource_filename;
/* check user options */
check_options(respath);
/* find the languages file */
languages_file_location = filepath_find(respath, "languages");
if ((languages_file_location == NULL) ||
(strlen(languages_file_location) < 10)) {
die("Unable to find resources.\n");
}
/* Obtain resources path location.
*
* Uses the directory the languages file was found in,
* @todo find and slaughter all references to this!
*/
res_dir_location = calloc(1, strlen(languages_file_location) - 8);
memcpy(res_dir_location,
languages_file_location,
strlen(languages_file_location) - 9);
LOG(("Using '%s' for resource path", res_dir_location));
/* initialise the glade templates */
nsgtk_init_glade(respath);
/* set default icon if its available */
resource_filename = filepath_find(respath, "netsurf.xpm");
if (resource_filename != NULL) {
gtk_window_set_default_icon_from_file(resource_filename, NULL);
free(resource_filename);
}
/* Search engine sources */
search_engines_file_location = filepath_find(respath, "SearchEngines");
LOG(("Using '%s' as Search Engines file", search_engines_file_location));
/* Default Icon */
search_default_ico_location = filepath_find(respath, "default.ico");
LOG(("Using '%s' as default search ico", search_default_ico_location));
/* Default favicon */
resource_filename = filepath_find(respath, "favicon.png");
if (resource_filename != NULL) {
favicon_pixbuf = gdk_pixbuf_new_from_file(resource_filename, NULL);
free(resource_filename);
if (favicon_pixbuf == NULL) {
favicon_pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, false, 8, 16,16);
}
}
/* Toolbar inicies file */
toolbar_indices_file_location = filepath_find(respath, "toolbarIndices");
LOG(("Using '%s' as custom toolbar settings file", toolbar_indices_file_location));
/* load throbber images */
if (nsgtk_throbber_init(respath, THROBBER_FRAMES) == false)
die("Unable to load throbber image.\n");
/* Initialise completions - cannot fail */
nsgtk_completion_init();
filepath_sfinddef(respath, buf, "mime.types", "/etc/");
gtk_fetch_filetype_init(buf);
urldb_load(nsoption_charp(url_file));
urldb_load_cookies(nsoption_charp(cookie_file));
/* The tree view system needs to know the screen's DPI, so we
* find that out here, rather than when we create a first browser
* window.
*/
nscss_screen_dpi = FLTTOFIX(gdk_screen_get_resolution(
gdk_screen_get_default()));
LOG(("Set CSS DPI to %f", FIXTOFLT(nscss_screen_dpi)));
if (nsgtk_history_init(glade_file_location->history) == false)
die("Unable to initialise history window.\n");
if (nsgtk_download_init(glade_file_location->downloads) == false)
die("Unable to initialise download window.\n");
if (nsgtk_cookies_init(glade_file_location->cookies) == false)
die("Unable to initialise cookies window.\n");
if (nsgtk_hotlist_init(glade_file_location->hotlist) == false)
die("Unable to initialise hotlist window.\n");
sslcert_init(tree_content_icon_name);
if (nsoption_charp(homepage_url) != NULL) {
addr = nsoption_charp(homepage_url);
}
if (2 <= argc)
addr = argv[1];
/* Last step of initialization. Opens the main browser window. */
browser_window_create(addr, 0, 0, true, false);
}
/**
* Font size computation callback for libcss
*
* \param pw Computation context
* \param parent Parent font size (absolute)
* \param size Font size to compute
* \return CSS_OK on success
*
* \post \a size will be an absolute font size
*/
css_error nscss_compute_font_size(void *pw, const css_hint *parent,
css_hint *size)
{
/**
* Table of font-size keyword scale factors
*
* These are multiplied by the configured default font size
* to produce an absolute size for the relevant keyword
*/
static const css_fixed factors[] = {
FLTTOFIX(0.5625), /* xx-small */
FLTTOFIX(0.6250), /* x-small */
FLTTOFIX(0.8125), /* small */
FLTTOFIX(1.0000), /* medium */
FLTTOFIX(1.1250), /* large */
FLTTOFIX(1.5000), /* x-large */
FLTTOFIX(2.0000) /* xx-large */
};
css_hint_length parent_size;
/* Grab parent size, defaulting to medium if none */
if (parent == NULL) {
parent_size.value = FDIV(FMUL(factors[CSS_FONT_SIZE_MEDIUM - 1],
INTTOFIX(nsoption_int(font_size))),
INTTOFIX(10));
parent_size.unit = CSS_UNIT_PT;
} else {
assert(parent->status == CSS_FONT_SIZE_DIMENSION);
assert(parent->data.length.unit != CSS_UNIT_EM);
assert(parent->data.length.unit != CSS_UNIT_EX);
assert(parent->data.length.unit != CSS_UNIT_PCT);
parent_size = parent->data.length;
}
assert(size->status != CSS_FONT_SIZE_INHERIT);
if (size->status < CSS_FONT_SIZE_LARGER) {
/* Keyword -- simple */
size->data.length.value = FDIV(FMUL(factors[size->status - 1],
INTTOFIX(nsoption_int(font_size))), F_10);
size->data.length.unit = CSS_UNIT_PT;
} else if (size->status == CSS_FONT_SIZE_LARGER) {
/** \todo Step within table, if appropriate */
size->data.length.value =
FMUL(parent_size.value, FLTTOFIX(1.2));
size->data.length.unit = parent_size.unit;
} else if (size->status == CSS_FONT_SIZE_SMALLER) {
/** \todo Step within table, if appropriate */
size->data.length.value =
FDIV(parent_size.value, FLTTOFIX(1.2));
size->data.length.unit = parent_size.unit;
} else if (size->data.length.unit == CSS_UNIT_EM ||
size->data.length.unit == CSS_UNIT_EX ||
size->data.length.unit == CSS_UNIT_CAP ||
size->data.length.unit == CSS_UNIT_CH ||
size->data.length.unit == CSS_UNIT_IC) {
size->data.length.value =
FMUL(size->data.length.value, parent_size.value);
switch (size->data.length.unit) {
case CSS_UNIT_EX:
/* 1ex = 0.6em in NetSurf */
size->data.length.value = FMUL(size->data.length.value,
FLTTOFIX(0.6));
break;
case CSS_UNIT_CAP:
/* Height of captals. 1cap = 0.9em in NetSurf. */
size->data.length.value = FMUL(size->data.length.value,
FLTTOFIX(0.9));
break;
case CSS_UNIT_CH:
/* Width of '0'. 1ch = 0.4em in NetSurf. */
size->data.length.value = FMUL(size->data.length.value,
FLTTOFIX(0.4));
break;
case CSS_UNIT_IC:
/* Width of U+6C43. 1ic = 1.1em in NetSurf. */
size->data.length.value = FMUL(size->data.length.value,
FLTTOFIX(1.1));
break;
default:
/* No scaling required for EM. */
break;
}
size->data.length.unit = parent_size.unit;
} else if (size->data.length.unit == CSS_UNIT_PCT) {
size->data.length.value = FDIV(FMUL(size->data.length.value,
parent_size.value), INTTOFIX(100));
size->data.length.unit = parent_size.unit;
} else if (size->data.length.unit == CSS_UNIT_REM) {
nscss_select_ctx *ctx = pw;
if (parent == NULL) {
size->data.length.value = parent_size.value;
size->data.length.unit = parent_size.unit;
} else {
css_computed_font_size(ctx->root_style,
&parent_size.value,
&size->data.length.unit);
size->data.length.value = FMUL(
size->data.length.value,
parent_size.value);
}
} else if (size->data.length.unit == CSS_UNIT_RLH) {
/** TODO: Convert root element line-height to absolute value. */
size->data.length.value = FMUL(size->data.length.value, FDIV(
INTTOFIX(nsoption_int(font_size)),
INTTOFIX(10)));
size->data.length.unit = CSS_UNIT_PT;
}
size->status = CSS_FONT_SIZE_DIMENSION;
return CSS_OK;
}
