PangoLayout * VwGraphicsCairo::GetPangoLayoutHelper()
{
if (m_fontMap == NULL)
m_fontMap = pango_cairo_font_map_get_default();
if (m_context == NULL)
{ m_context = pango_context_new();
pango_context_set_font_map(m_context, m_fontMap);
}
if (m_layout == NULL)
{
m_layout = pango_layout_new(m_context);
PangoAttrList* list = pango_attr_list_new();
PangoAttribute * fallbackAttrib = pango_attr_fallback_new(true);
pango_attr_list_insert(list, fallbackAttrib);
pango_layout_set_attributes(m_layout, list);
pango_attr_list_unref(list);
pango_layout_set_single_paragraph_mode(m_layout, true);
}
return m_layout;
}
static void
text_to_glyphs (cairo_t *cr,
const gchar *text,
cairo_glyph_t **glyphs,
int *num_glyphs)
{
PangoAttribute *fallback_attr;
PangoAttrList *attr_list;
PangoContext *context;
PangoDirection base_dir;
GList *items;
GList *visual_items;
FT_Face ft_face;
hb_font_t *hb_font;
gdouble x = 0, y = 0;
gint i;
gdouble x_scale, y_scale;
*num_glyphs = 0;
*glyphs = NULL;
base_dir = pango_find_base_dir (text, -1);
cairo_scaled_font_t *cr_font = cairo_get_scaled_font (cr);
ft_face = cairo_ft_scaled_font_lock_face (cr_font);
hb_font = hb_ft_font_create (ft_face, NULL);
cairo_surface_t *target = cairo_get_target (cr);
cairo_surface_get_device_scale (target, &x_scale, &y_scale);
/* We abuse pango itemazation to split text into script and direction
* runs, since we use our fonts directly no through pango, we don't
* bother changing the default font, but we disable font fallback as
* pango will split runs at font change */
context = pango_cairo_create_context (cr);
attr_list = pango_attr_list_new ();
fallback_attr = pango_attr_fallback_new (FALSE);
pango_attr_list_insert (attr_list, fallback_attr);
items = pango_itemize_with_base_dir (context, base_dir,
text, 0, strlen (text),
attr_list, NULL);
g_object_unref (context);
pango_attr_list_unref (attr_list);
/* reorder the items in the visual order */
visual_items = pango_reorder_items (items);
while (visual_items) {
PangoItem *item;
PangoAnalysis analysis;
hb_buffer_t *hb_buffer;
hb_glyph_info_t *hb_glyphs;
hb_glyph_position_t *hb_positions;
gint n;
item = visual_items->data;
analysis = item->analysis;
hb_buffer = hb_buffer_create ();
hb_buffer_add_utf8 (hb_buffer, text, -1, item->offset, item->length);
hb_buffer_set_script (hb_buffer, hb_glib_script_to_script (analysis.script));
hb_buffer_set_language (hb_buffer, hb_language_from_string (pango_language_to_string (analysis.language), -1));
hb_buffer_set_direction (hb_buffer, analysis.level % 2 ? HB_DIRECTION_RTL : HB_DIRECTION_LTR);
hb_shape (hb_font, hb_buffer, NULL, 0);
n = hb_buffer_get_length (hb_buffer);
hb_glyphs = hb_buffer_get_glyph_infos (hb_buffer, NULL);
hb_positions = hb_buffer_get_glyph_positions (hb_buffer, NULL);
*glyphs = g_renew (cairo_glyph_t, *glyphs, *num_glyphs + n);
for (i = 0; i < n; i++) {
(*glyphs)[*num_glyphs + i].index = hb_glyphs[i].codepoint;
(*glyphs)[*num_glyphs + i].x = x + (hb_positions[i].x_offset / (64. * x_scale));
(*glyphs)[*num_glyphs + i].y = y - (hb_positions[i].y_offset / (64. * y_scale));
x += (hb_positions[i].x_advance / (64. * x_scale));
y -= (hb_positions[i].y_advance / (64. * y_scale));
}
*num_glyphs += n;
hb_buffer_destroy (hb_buffer);
visual_items = visual_items->next;
}
g_list_free_full (visual_items, (GDestroyNotify) pango_item_free);
g_list_free_full (items, (GDestroyNotify) pango_item_free);
hb_font_destroy (hb_font);
cairo_ft_scaled_font_unlock_face (cr_font);
}
PangoLayout*
gdip_pango_setup_layout (GpGraphics *graphics, GDIPCONST WCHAR *stringUnicode, int length, GDIPCONST GpFont *font,
GDIPCONST RectF *rc, RectF *box, GDIPCONST GpStringFormat *format, int **charsRemoved)
{
GpStringFormat *fmt;
PangoLayout *layout;
PangoContext *context;
PangoRectangle logical; /* logical size of text (used for alignment) */
PangoRectangle ink; /* ink size of text (to pixel boundaries) */
PangoAttrList *list = NULL;
GString *ftext;
PangoTabArray *tabs;
PangoLayoutIter *iter;
int i;
int FrameWidth; /* rc->Width (or rc->Height if vertical) */
int FrameHeight; /* rc->Height (or rc->Width if vertical) */
int FrameX; /* rc->X (or rc->Y if vertical) */
int FrameY; /* rc->Y (or rc->X if vertical) */
int y0; /* y0,y1,clipNN used for checking line positions vs. clip rectangle */
int y1;
double clipx1;
double clipx2;
double clipy1;
double clipy2;
int trimSpace; /* whether or not to trim the space */
gchar *text = ucs2_to_utf8 (stringUnicode, length);
if (!text)
return NULL;
length = strlen(text);
if (charsRemoved) {
(*charsRemoved) = GdipAlloc (sizeof (int) * length);
if (!*charsRemoved) {
GdipFree (text);
return NULL;
}
memset (*charsRemoved, 0, sizeof (int) * length);
}
/* TODO - Digit substitution */
// g_warning ("layout >%s< (%d) [x %g, y %g, w %g, h %g] [font %s, %g points]", text, length, rc->X, rc->Y, rc->Width, FrameHeight, font->face, font->emSize);
/* a NULL format is valid, it means get the generic default values (and free them later) */
if (!format) {
GpStatus status = GdipStringFormatGetGenericDefault ((GpStringFormat **)&fmt);
if (status != Ok) {
GdipFree (text);
return NULL;
}
} else {
fmt = (GpStringFormat *)format;
}
layout = pango_cairo_create_layout (graphics->ct);
/* context is owned by Pango (i.e. not referenced counted) do not free */
context = pango_layout_get_context (layout);
pango_layout_set_font_description (layout, gdip_get_pango_font_description ((GpFont*) font));
if (fmt->formatFlags & StringFormatFlagsDirectionVertical) {
FrameWidth = MAKE_SAFE_FOR_PANGO (SAFE_FLOAT_TO_UINT32 (rc->Height));
FrameHeight = MAKE_SAFE_FOR_PANGO (SAFE_FLOAT_TO_UINT32 (rc->Width));
FrameX = SAFE_FLOAT_TO_UINT32 (rc->Y);
FrameY = SAFE_FLOAT_TO_UINT32 (rc->X);
} else {
FrameWidth = MAKE_SAFE_FOR_PANGO (SAFE_FLOAT_TO_UINT32 (rc->Width));
FrameHeight = MAKE_SAFE_FOR_PANGO (SAFE_FLOAT_TO_UINT32 (rc->Height));
FrameX = SAFE_FLOAT_TO_UINT32 (rc->X);
FrameY = SAFE_FLOAT_TO_UINT32 (rc->Y);
}
//g_warning("FW: %d\tFH: %d", FrameWidth, FrameHeight);
if ((FrameWidth <= 0) || (fmt->formatFlags & StringFormatFlagsNoWrap)) {
pango_layout_set_width (layout, -1);
//g_warning ("Setting width: %d", -1);
} else {
pango_layout_set_width (layout, FrameWidth * PANGO_SCALE);
//g_warning ("Setting width: %d", FrameWidth * PANGO_SCALE);
}
if ((rc->Width != 0) && (rc->Height != 0) && ((fmt->formatFlags & StringFormatFlagsNoClip) == 0)) {
// g_warning ("\tclip [%g %g %g %g]", rc->X, rc->Y, rc->Width, rc->Height);
/* We do not call cairo_reset_clip because we want to take previous clipping into account */
/* Use rc instead of frame variables because this is pre-transform */
gdip_cairo_rectangle (graphics, rc->X, rc->Y, rc->Width, rc->Height, TRUE);
cairo_clip (graphics->ct);
}
/* with GDI+ the API not the renderer makes the direction decision */
pango_layout_set_auto_dir (layout, FALSE);
if (!(fmt->formatFlags & StringFormatFlagsDirectionRightToLeft) != !(fmt->formatFlags & StringFormatFlagsDirectionVertical)) {
pango_context_set_base_dir (context, PANGO_DIRECTION_WEAK_RTL);
pango_layout_context_changed (layout);
/* horizontal alignment */
switch (fmt->alignment) {
case StringAlignmentNear:
pango_layout_set_alignment (layout, PANGO_ALIGN_RIGHT);
break;
case StringAlignmentCenter:
pango_layout_set_alignment (layout, PANGO_ALIGN_CENTER);
break;
case StringAlignmentFar:
pango_layout_set_alignment (layout, PANGO_ALIGN_LEFT);
break;
}
} else {
/* pango default base dir is WEAK_LTR, which is what we want */
/* horizontal alignment */
switch (fmt->alignment) {
case StringAlignmentNear:
pango_layout_set_alignment (layout, PANGO_ALIGN_LEFT);
break;
case StringAlignmentCenter:
pango_layout_set_alignment (layout, PANGO_ALIGN_CENTER);
break;
case StringAlignmentFar:
pango_layout_set_alignment (layout, PANGO_ALIGN_RIGHT);
break;
}
}
#ifdef PANGO_VERSION_CHECK
#if PANGO_VERSION_CHECK(1,16,0)
if (fmt->formatFlags & StringFormatFlagsDirectionVertical) {
if (fmt->formatFlags & StringFormatFlagsDirectionRightToLeft) {
cairo_rotate (graphics->ct, M_PI/2.0);
cairo_translate (graphics->ct, 0, -FrameHeight);
pango_cairo_update_context (graphics->ct, context);
} else {
cairo_rotate (graphics->ct, 3.0*M_PI/2.0);
cairo_translate (graphics->ct, -FrameWidth, 0);
pango_cairo_update_context (graphics->ct, context);
}
/* only since Pango 1.16 */
pango_context_set_base_gravity (context, PANGO_GRAVITY_AUTO);
pango_context_set_gravity_hint (context, PANGO_GRAVITY_HINT_LINE);
pango_layout_context_changed (layout);
}
#endif
#endif
/* TODO - StringFormatFlagsDisplayFormatControl
scan and replace them ??? */
/* Trimming options seem to apply only to the end of the string - gdi+ will still wrap
* with preference to word first, then character. Unfortunately, pango doesn't have
* any way to differentiate wrapping behavior from trimming behavior that I could find */
pango_layout_set_wrap (layout, PANGO_WRAP_WORD_CHAR);
switch (fmt->trimming) {
case StringTrimmingNone:
pango_layout_set_ellipsize (layout, PANGO_ELLIPSIZE_NONE);
break;
case StringTrimmingCharacter:
pango_layout_set_ellipsize (layout, PANGO_ELLIPSIZE_NONE);
break;
case StringTrimmingWord:
pango_layout_set_ellipsize (layout, PANGO_ELLIPSIZE_NONE);
break;
case StringTrimmingEllipsisCharacter:
pango_layout_set_ellipsize (layout, PANGO_ELLIPSIZE_END);
if (!(fmt->formatFlags & StringFormatFlagsNoWrap))
pango_layout_set_height (layout, FrameHeight == 0 ? G_MAXINT32 : FrameHeight * PANGO_SCALE);
break;
case StringTrimmingEllipsisWord:
pango_layout_set_ellipsize (layout, PANGO_ELLIPSIZE_END);
if (!(fmt->formatFlags & StringFormatFlagsNoWrap))
pango_layout_set_height (layout, FrameHeight == 0 ? G_MAXINT32 : FrameHeight * PANGO_SCALE);
break;
case StringTrimmingEllipsisPath:
pango_layout_set_ellipsize (layout, PANGO_ELLIPSIZE_MIDDLE);
if (!(fmt->formatFlags & StringFormatFlagsNoWrap))
pango_layout_set_height (layout, FrameHeight == 0 ? G_MAXINT32 : FrameHeight * PANGO_SCALE);
break;
}
/* some stuff can only be done by manipulating the attributes (but we can avoid this most of the time) */
if ((fmt->formatFlags & StringFormatFlagsNoFontFallback) || (font->style & (FontStyleUnderline | FontStyleStrikeout))) {
list = gdip_get_layout_attributes (layout);
/* StringFormatFlagsNoFontFallback */
if (fmt->formatFlags & StringFormatFlagsNoFontFallback) {
PangoAttribute *attr = pango_attr_fallback_new (FALSE);
attr->start_index = 0;
attr->end_index = length;
pango_attr_list_insert (list, attr);
}
if (font->style & FontStyleUnderline) {
PangoAttribute *attr = pango_attr_underline_new (PANGO_UNDERLINE_SINGLE);
attr->start_index = 0;
attr->end_index = length;
pango_attr_list_insert (list, attr);
}
if (font->style & FontStyleStrikeout) {
PangoAttribute *attr = pango_attr_strikethrough_new (TRUE);
attr->start_index = 0;
attr->end_index = length;
pango_attr_list_insert (list, attr);
}
}
if (fmt->numtabStops > 0) {
float tabPosition;
tabs = pango_tab_array_new (fmt->numtabStops, FALSE);
tabPosition = fmt->firstTabOffset;
for (i = 0; i < fmt->numtabStops; i++) {
tabPosition += fmt->tabStops[i];
pango_tab_array_set_tab (tabs, i, PANGO_TAB_LEFT, (gint)min (tabPosition, PANGO_MAX) * PANGO_SCALE);
}
pango_layout_set_tabs (layout, tabs);
pango_tab_array_free (tabs);
}
//g_warning ("length before ws removal: %d", length);
trimSpace = (fmt->formatFlags & StringFormatFlagsMeasureTrailingSpaces) == 0;
switch (fmt->hotkeyPrefix) {
case HotkeyPrefixHide:
/* we need to remove any accelerator from the string */
ftext = gdip_process_string (text, length, 1, trimSpace, NULL, charsRemoved);
break;
case HotkeyPrefixShow:
/* optimization: is seems that we never see the hotkey when using an underline font */
if (font->style & FontStyleUnderline) {
/* so don't bother drawing it (and simply add the '&' character) */
ftext = gdip_process_string (text, length, 1, trimSpace, NULL, charsRemoved);
} else {
/* find accelerator and add attribute to the next character (unless it's the prefix too) */
if (!list)
list = gdip_get_layout_attributes (layout);
ftext = gdip_process_string (text, length, 1, trimSpace, list, charsRemoved);
}
break;
default:
ftext = gdip_process_string (text, length, 0, trimSpace, NULL, charsRemoved);
break;
}
length = ftext->len;
//g_warning ("length after ws removal: %d", length);
if (list) {
pango_layout_set_attributes (layout, list);
pango_attr_list_unref (list);
}
// g_warning("\tftext>%s< (%d)", ftext->str, -1);
pango_layout_set_text (layout, ftext->str, ftext->len);
GdipFree (text);
g_string_free(ftext, TRUE);
/* Trim the text after the last line for ease of counting lines/characters */
/* Also prevents drawing whole lines outside the boundaries if NoClip was specified */
/* In case of pre-existing clipping, use smaller of clip rectangle or our specified height */
if (FrameHeight > 0) {
cairo_clip_extents (graphics->ct, &clipx1, &clipy1, &clipx2, &clipy2);
if (clipy2 > 0 && !(fmt->formatFlags & StringFormatFlagsNoClip))
clipy2 = min (clipy2, FrameHeight + FrameY);
else
clipy2 = FrameHeight + FrameY;
iter = pango_layout_get_iter (layout);
do {
if (iter == NULL)
break;
pango_layout_iter_get_line_yrange (iter, &y0, &y1);
//g_warning("yrange: %d %d clipy2: %f", y0 / PANGO_SCALE, y1 / PANGO_SCALE, clipy2);
/* StringFormatFlagsLineLimit */
if (((fmt->formatFlags & StringFormatFlagsLineLimit) && y1 / PANGO_SCALE > clipy2) || (y0 / PANGO_SCALE > clipy2)) {
PangoLayoutLine *line = pango_layout_iter_get_line_readonly (iter);
pango_layout_set_text (layout, pango_layout_get_text (layout), line->start_index);
break;
}
} while (pango_layout_iter_next_line (iter));
pango_layout_iter_free (iter);
}
pango_layout_get_pixel_extents (layout, &ink, &logical);
// g_warning ("\tlogical\t[x %d, y %d, w %d, h %d][x %d, y %d, w %d, h %d]", logical.x, logical.y, logical.width, logical.height, ink.x, ink.y, ink.width, ink.height);
if ((fmt->formatFlags & StringFormatFlagsNoFitBlackBox) == 0) {
/* By default don't allow overhang - ink space may be larger than logical space */
if (fmt->formatFlags & StringFormatFlagsDirectionVertical) {
box->X = min (ink.y, logical.y);
box->Y = min (ink.x, logical.x);
box->Height = max (ink.width, logical.width);
box->Width = max (ink.height, logical.height);
} else {
box->X = min (ink.x, logical.x);
box->Y = min (ink.y, logical.y);
box->Height = max (ink.height, logical.height);
box->Width = max (ink.width, logical.width);
}
} else {
/* Allow overhang */
if (fmt->formatFlags & StringFormatFlagsDirectionVertical) {
box->X = logical.y;
box->Y = logical.x;
box->Height = logical.width;
box->Width = logical.height;
} else {
box->X = logical.x;
box->Y = logical.y;
box->Height = logical.height;
box->Width = logical.width;
}
}
// g_warning ("\tbox\t[x %g, y %g, w %g, h %g]", box->X, box->Y, box->Width, box->Height);
/* vertical alignment*/
if (fmt->formatFlags & StringFormatFlagsDirectionVertical) {
switch (fmt->lineAlignment) {
case StringAlignmentNear:
break;
case StringAlignmentCenter:
box->X += (rc->Width - box->Width) / 2;
break;
case StringAlignmentFar:
box->X += (rc->Width - box->Width);
break;
}
} else {
switch (fmt->lineAlignment) {
case StringAlignmentNear:
break;
case StringAlignmentCenter:
box->Y += (rc->Height - box->Height) / 2;
break;
case StringAlignmentFar:
box->Y += (rc->Height - box->Height);
break;
}
}
// g_warning ("va-box\t[x %g, y %g, w %g, h %g]", box->X, box->Y, box->Width, box->Height);
pango_cairo_update_layout (graphics->ct, layout);
return layout;
}
static gboolean
span_parse_func (MarkupData *md,
OpenTag *tag,
const gchar **names,
const gchar **values,
GMarkupParseContext *context,
GError **error)
{
int line_number, char_number;
int i;
const char *family = NULL;
const char *size = NULL;
const char *style = NULL;
const char *weight = NULL;
const char *variant = NULL;
const char *stretch = NULL;
const char *desc = NULL;
const char *foreground = NULL;
const char *background = NULL;
const char *underline = NULL;
const char *underline_color = NULL;
const char *strikethrough = NULL;
const char *strikethrough_color = NULL;
const char *rise = NULL;
const char *letter_spacing = NULL;
const char *lang = NULL;
const char *fallback = NULL;
const char *gravity = NULL;
const char *gravity_hint = NULL;
g_markup_parse_context_get_position (context,
&line_number, &char_number);
#define CHECK_DUPLICATE(var) G_STMT_START{ \
if ((var) != NULL) { \
g_set_error (error, G_MARKUP_ERROR, \
G_MARKUP_ERROR_INVALID_CONTENT, \
_("Attribute '%s' occurs twice on <span> tag " \
"on line %d char %d, may only occur once"), \
names[i], line_number, char_number); \
return FALSE; \
}}G_STMT_END
#define CHECK_ATTRIBUTE2(var, name) \
if (attr_strcmp (names[i], (name)) == 0) { \
CHECK_DUPLICATE (var); \
(var) = values[i]; \
found = TRUE; \
break; \
}
#define CHECK_ATTRIBUTE(var) CHECK_ATTRIBUTE2 (var, G_STRINGIFY (var))
i = 0;
while (names[i])
{
gboolean found = FALSE;
switch (names[i][0]) {
case 'f':
CHECK_ATTRIBUTE (fallback);
CHECK_ATTRIBUTE2(desc, "font");
CHECK_ATTRIBUTE2(desc, "font_desc");
CHECK_ATTRIBUTE2(family, "face");
CHECK_ATTRIBUTE2(family, "font_family");
CHECK_ATTRIBUTE2(size, "font_size");
CHECK_ATTRIBUTE2(stretch, "font_stretch");
CHECK_ATTRIBUTE2(style, "font_style");
CHECK_ATTRIBUTE2(variant, "font_variant");
CHECK_ATTRIBUTE2(weight, "font_weight");
CHECK_ATTRIBUTE (foreground);
CHECK_ATTRIBUTE2 (foreground, "fgcolor");
break;
case 's':
CHECK_ATTRIBUTE (size);
CHECK_ATTRIBUTE (stretch);
CHECK_ATTRIBUTE (strikethrough);
CHECK_ATTRIBUTE (strikethrough_color);
CHECK_ATTRIBUTE (style);
break;
case 'g':
CHECK_ATTRIBUTE (gravity);
CHECK_ATTRIBUTE (gravity_hint);
break;
case 'l':
CHECK_ATTRIBUTE (lang);
CHECK_ATTRIBUTE (letter_spacing);
break;
case 'u':
CHECK_ATTRIBUTE (underline);
CHECK_ATTRIBUTE (underline_color);
break;
default:
CHECK_ATTRIBUTE (background);
CHECK_ATTRIBUTE2 (background, "bgcolor");
CHECK_ATTRIBUTE2(foreground, "color");
CHECK_ATTRIBUTE (rise);
CHECK_ATTRIBUTE (variant);
CHECK_ATTRIBUTE (weight);
break;
}
if (!found)
{
g_set_error (error, G_MARKUP_ERROR,
G_MARKUP_ERROR_UNKNOWN_ATTRIBUTE,
_("Attribute '%s' is not allowed on the <span> tag "
"on line %d char %d"),
names[i], line_number, char_number);
return FALSE;
}
++i;
}
/* Parse desc first, then modify it with other font-related attributes. */
if (G_UNLIKELY (desc))
{
PangoFontDescription *parsed;
parsed = pango_font_description_from_string (desc);
if (parsed)
{
add_attribute (tag, pango_attr_font_desc_new (parsed));
if (tag)
open_tag_set_absolute_font_size (tag, pango_font_description_get_size (parsed));
pango_font_description_free (parsed);
}
}
if (G_UNLIKELY (family))
{
add_attribute (tag, pango_attr_family_new (family));
}
if (G_UNLIKELY (size))
{
if (g_ascii_isdigit (*size))
{
const char *end;
gint n;
/* cap size from the top at an arbitrary 2048 */
#define MAX_SIZE (2048 * PANGO_SCALE)
if ((end = size, !pango_scan_int (&end, &n)) || *end != '\0' || n < 0 || n > MAX_SIZE)
{
g_set_error (error,
G_MARKUP_ERROR,
G_MARKUP_ERROR_INVALID_CONTENT,
_("Value of 'size' attribute on <span> tag on line %d "
"could not be parsed; should be an integer less than %d, or a "
"string such as 'small', not '%s'"),
line_number, MAX_SIZE+1, size);
goto error;
}
add_attribute (tag, pango_attr_size_new (n));
if (tag)
open_tag_set_absolute_font_size (tag, n);
}
else if (strcmp (size, "smaller") == 0)
{
if (tag)
{
tag->scale_level_delta -= 1;
tag->scale_level -= 1;
}
}
else if (strcmp (size, "larger") == 0)
{
if (tag)
{
tag->scale_level_delta += 1;
tag->scale_level += 1;
}
}
else if (parse_absolute_size (tag, size))
; /* nothing */
else
{
g_set_error (error,
G_MARKUP_ERROR,
G_MARKUP_ERROR_INVALID_CONTENT,
_("Value of 'size' attribute on <span> tag on line %d "
"could not be parsed; should be an integer, or a "
"string such as 'small', not '%s'"),
line_number, size);
goto error;
}
}
if (G_UNLIKELY (style))
{
PangoStyle pango_style;
if (pango_parse_style (style, &pango_style, FALSE))
add_attribute (tag, pango_attr_style_new (pango_style));
else
{
g_set_error (error,
G_MARKUP_ERROR,
G_MARKUP_ERROR_INVALID_CONTENT,
_("'%s' is not a valid value for the 'style' attribute "
"on <span> tag, line %d; valid values are "
"'normal', 'oblique', 'italic'"),
style, line_number);
goto error;
}
}
if (G_UNLIKELY (weight))
{
PangoWeight pango_weight;
if (pango_parse_weight (weight, &pango_weight, FALSE))
add_attribute (tag,
pango_attr_weight_new (pango_weight));
else
{
g_set_error (error,
G_MARKUP_ERROR,
G_MARKUP_ERROR_INVALID_CONTENT,
_("'%s' is not a valid value for the 'weight' "
"attribute on <span> tag, line %d; valid "
"values are for example 'light', 'ultrabold' or a number"),
weight, line_number);
goto error;
}
}
if (G_UNLIKELY (variant))
{
PangoVariant pango_variant;
if (pango_parse_variant (variant, &pango_variant, FALSE))
add_attribute (tag, pango_attr_variant_new (pango_variant));
else
{
g_set_error (error,
G_MARKUP_ERROR,
G_MARKUP_ERROR_INVALID_CONTENT,
_("'%s' is not a valid value for the 'variant' "
"attribute on <span> tag, line %d; valid values are "
"'normal', 'smallcaps'"),
variant, line_number);
goto error;
}
}
if (G_UNLIKELY (stretch))
{
PangoStretch pango_stretch;
if (pango_parse_stretch (stretch, &pango_stretch, FALSE))
add_attribute (tag, pango_attr_stretch_new (pango_stretch));
else
{
g_set_error (error,
G_MARKUP_ERROR,
G_MARKUP_ERROR_INVALID_CONTENT,
_("'%s' is not a valid value for the 'stretch' "
"attribute on <span> tag, line %d; valid "
"values are for example 'condensed', "
"'ultraexpanded', 'normal'"),
stretch, line_number);
goto error;
}
}
if (G_UNLIKELY (foreground))
{
PangoColor color;
if (!span_parse_color ("foreground", foreground, &color, line_number, error))
goto error;
add_attribute (tag, pango_attr_foreground_new (color.red, color.green, color.blue));
}
if (G_UNLIKELY (background))
{
PangoColor color;
if (!span_parse_color ("background", background, &color, line_number, error))
goto error;
add_attribute (tag, pango_attr_background_new (color.red, color.green, color.blue));
}
if (G_UNLIKELY (underline))
{
PangoUnderline ul = PANGO_UNDERLINE_NONE;
if (!span_parse_enum ("underline", underline, PANGO_TYPE_UNDERLINE, &ul, line_number, error))
goto error;
add_attribute (tag, pango_attr_underline_new (ul));
}
if (G_UNLIKELY (underline_color))
{
PangoColor color;
if (!span_parse_color ("underline_color", underline_color, &color, line_number, error))
goto error;
add_attribute (tag, pango_attr_underline_color_new (color.red, color.green, color.blue));
}
if (G_UNLIKELY (gravity))
{
PangoGravity gr = PANGO_GRAVITY_SOUTH;
if (!span_parse_enum ("gravity", gravity, PANGO_TYPE_GRAVITY, &gr, line_number, error))
goto error;
add_attribute (tag, pango_attr_gravity_new (gr));
}
if (G_UNLIKELY (gravity_hint))
{
PangoGravityHint hint = PANGO_GRAVITY_HINT_NATURAL;
if (!span_parse_enum ("gravity_hint", gravity_hint, PANGO_TYPE_GRAVITY_HINT, &hint, line_number, error))
goto error;
add_attribute (tag, pango_attr_gravity_hint_new (hint));
}
if (G_UNLIKELY (strikethrough))
{
gboolean b = FALSE;
if (!span_parse_boolean ("strikethrough", strikethrough, &b, line_number, error))
goto error;
add_attribute (tag, pango_attr_strikethrough_new (b));
}
if (G_UNLIKELY (strikethrough_color))
{
PangoColor color;
if (!span_parse_color ("strikethrough_color", strikethrough_color, &color, line_number, error))
goto error;
add_attribute (tag, pango_attr_strikethrough_color_new (color.red, color.green, color.blue));
}
if (G_UNLIKELY (fallback))
{
gboolean b = FALSE;
if (!span_parse_boolean ("fallback", fallback, &b, line_number, error))
goto error;
add_attribute (tag, pango_attr_fallback_new (b));
}
if (G_UNLIKELY (rise))
{
gint n = 0;
if (!span_parse_int ("rise", rise, &n, line_number, error))
goto error;
add_attribute (tag, pango_attr_rise_new (n));
}
if (G_UNLIKELY (letter_spacing))
{
gint n = 0;
if (!span_parse_int ("letter_spacing", letter_spacing, &n, line_number, error))
goto error;
add_attribute (tag, pango_attr_letter_spacing_new (n));
}
if (G_UNLIKELY (lang))
{
add_attribute (tag,
pango_attr_language_new (pango_language_from_string (lang)));
}
return TRUE;
error:
return FALSE;
}
/* Shapes the ellipsis using the font and is_cjk information computed by
* update_ellipsis_shape() from the first character in the gap.
*/
static void
shape_ellipsis (EllipsizeState *state)
{
PangoAttrList *attrs = pango_attr_list_new ();
GSList *run_attrs;
PangoItem *item;
PangoGlyphString *glyphs;
GSList *l;
PangoAttribute *fallback;
const char *ellipsis_text;
int i;
/* Create/reset state->ellipsis_run
*/
if (!state->ellipsis_run)
{
state->ellipsis_run = g_slice_new (PangoGlyphItem);
state->ellipsis_run->glyphs = pango_glyph_string_new ();
state->ellipsis_run->item = NULL;
}
if (state->ellipsis_run->item)
{
pango_item_free (state->ellipsis_run->item);
state->ellipsis_run->item = NULL;
}
/* Create an attribute list
*/
run_attrs = pango_attr_iterator_get_attrs (state->gap_start_attr);
for (l = run_attrs; l; l = l->next)
{
PangoAttribute *attr = l->data;
attr->start_index = 0;
attr->end_index = G_MAXINT;
pango_attr_list_insert (attrs, attr);
}
g_slist_free (run_attrs);
fallback = pango_attr_fallback_new (FALSE);
fallback->start_index = 0;
fallback->end_index = G_MAXINT;
pango_attr_list_insert (attrs, fallback);
/* First try using a specific ellipsis character in the best matching font
*/
if (state->ellipsis_is_cjk)
ellipsis_text = "\342\213\257"; /* U+22EF: MIDLINE HORIZONTAL ELLIPSIS, used for CJK */
else
ellipsis_text = "\342\200\246"; /* U+2026: HORIZONTAL ELLIPSIS */
item = itemize_text (state, ellipsis_text, attrs);
/* If that fails we use "..." in the first matching font
*/
if (!item->analysis.font ||
!_pango_engine_shape_covers (item->analysis.shape_engine, item->analysis.font,
item->analysis.language, g_utf8_get_char (ellipsis_text)))
{
pango_item_free (item);
/* Modify the fallback iter while it is inside the PangoAttrList; Don't try this at home
*/
((PangoAttrInt *)fallback)->value = TRUE;
ellipsis_text = "...";
item = itemize_text (state, ellipsis_text, attrs);
}
pango_attr_list_unref (attrs);
state->ellipsis_run->item = item;
/* Now shape
*/
glyphs = state->ellipsis_run->glyphs;
pango_shape (ellipsis_text, strlen (ellipsis_text),
&item->analysis, glyphs);
state->ellipsis_width = 0;
for (i = 0; i < glyphs->num_glyphs; i++)
state->ellipsis_width += glyphs->glyphs[i].geometry.width;
}
