FloatRect Font::selectionRectForComplexText(const TextRun& run, const IntPoint& point, int h, int from, int to) const
{
PangoLayout* layout = getDefaultPangoLayout(run);
setPangoAttributes(this, run, layout);
gchar* utf8 = convertUniCharToUTF8(run.characters(), run.length(), 0, run.length());
pango_layout_set_text(layout, utf8, -1);
char* start = g_utf8_offset_to_pointer(utf8, from);
char* end = g_utf8_offset_to_pointer(start, to - from);
if (run.ltr()) {
from = start - utf8;
to = end - utf8;
} else {
from = end - utf8;
to = start - utf8;
}
PangoLayoutLine* layoutLine = pango_layout_get_line_readonly(layout, 0);
int x_pos;
x_pos = 0;
if (from < layoutLine->length)
pango_layout_line_index_to_x(layoutLine, from, FALSE, &x_pos);
float beforeWidth = PANGO_PIXELS_FLOOR(x_pos);
x_pos = 0;
if (run.ltr() || to < layoutLine->length)
pango_layout_line_index_to_x(layoutLine, to, FALSE, &x_pos);
float afterWidth = PANGO_PIXELS(x_pos);
g_free(utf8);
g_object_unref(layout);
return FloatRect(point.x() + beforeWidth, point.y(), afterWidth - beforeWidth, h);
}
/** Draw a TextLine object.
* @param object The renderer object to use for transform and output
* @param text_line The TextLine to render, including font and height.
* @param pos The position to render it at.
* @param color The color to render it with.
*/
static void
draw_text_line (DiaRenderer *object, TextLine *text_line,
Point *pos, Alignment alignment, Color *color)
{
DiaGdkRenderer *renderer = DIA_GDK_RENDERER (object);
GdkColor gdkcolor;
int x,y;
Point start_pos;
PangoLayout* layout = NULL;
const gchar *text = text_line_get_string(text_line);
int height_pixels;
real font_height = text_line_get_height(text_line);
real scale = dia_transform_length(renderer->transform, 1.0);
if (text == NULL || *text == '\0') return; /* Don't render empty strings. */
point_copy(&start_pos,pos);
renderer_color_convert(renderer, color, &gdkcolor);
height_pixels = dia_transform_length(renderer->transform, font_height);
if (height_pixels < 2) { /* "Greeking" instead of making tiny font */
int width_pixels = dia_transform_length(renderer->transform,
text_line_get_width(text_line));
gdk_gc_set_foreground(renderer->gc, &gdkcolor);
gdk_gc_set_dashes(renderer->gc, 0, (gint8*)"\1\2", 2);
dia_transform_coords(renderer->transform, start_pos.x, start_pos.y, &x, &y);
gdk_draw_line(renderer->pixmap, renderer->gc, x, y, x + width_pixels, y);
return;
} else {
start_pos.y -= text_line_get_ascent(text_line);
start_pos.x -= text_line_get_alignment_adjustment (text_line, alignment);
dia_transform_coords(renderer->transform,
start_pos.x, start_pos.y, &x, &y);
layout = dia_font_build_layout(text, text_line->font,
dia_transform_length(renderer->transform, text_line->height)/20.0);
#if defined(PANGO_VERSION_ENCODE)
# if (PANGO_VERSION >= PANGO_VERSION_ENCODE(1,16,0))
/* I'd say the former Pango API was broken, i.e. leaky */
# define HAVE_pango_layout_get_line_readonly
# endif
#endif
text_line_adjust_layout_line (text_line,
#if defined(HAVE_pango_layout_get_line_readonly)
pango_layout_get_line_readonly(layout, 0),
#else
pango_layout_get_line(layout, 0),
#endif
scale/20.0);
if (renderer->highlight_color != NULL) {
draw_highlighted_string(renderer, layout, x, y, &gdkcolor);
} else {
#if defined HAVE_FREETYPE
{
FT_Bitmap ftbitmap;
int width, height;
GdkPixbuf *rgba = NULL;
width = dia_transform_length(renderer->transform,
text_line_get_width(text_line));
height = dia_transform_length(renderer->transform,
text_line_get_height(text_line));
if (width > 0) {
int stride;
guchar* pixels;
int i,j;
guint8 *graybitmap;
initialize_ft_bitmap(&ftbitmap, width, height);
pango_ft2_render_layout(&ftbitmap, layout, 0, 0);
graybitmap = ftbitmap.buffer;
rgba = gdk_pixbuf_new(GDK_COLORSPACE_RGB, TRUE, 8, width, height);
stride = gdk_pixbuf_get_rowstride(rgba);
pixels = gdk_pixbuf_get_pixels(rgba);
for (i = 0; i < height; i++) {
for (j = 0; j < width; j++) {
pixels[i*stride+j*4] = gdkcolor.red>>8;
pixels[i*stride+j*4+1] = gdkcolor.green>>8;
pixels[i*stride+j*4+2] = gdkcolor.blue>>8;
pixels[i*stride+j*4+3] = graybitmap[i*ftbitmap.pitch+j];
}
}
g_free(graybitmap);
gdk_draw_pixbuf(renderer->pixmap, renderer->gc, rgba, 0, 0, x, y, width, height, GDK_RGB_DITHER_NONE, 0, 0);
g_object_unref(G_OBJECT(rgba));
}
}
#else
gdk_gc_set_foreground(renderer->gc, &gdkcolor);
gdk_draw_layout(renderer->pixmap, renderer->gc, x, y, layout);
#endif
} /* !higlight_color */
g_object_unref(G_OBJECT(layout));
} /* !greeking */
void Font::drawComplexText(GraphicsContext* context, const TextRun& run, const FloatPoint& point, int from, int to) const
{
#if USE(FREETYPE)
if (!primaryFont()->platformData().m_pattern) {
drawSimpleText(context, run, point, from, to);
return;
}
#endif
cairo_t* cr = context->platformContext()->cr();
PangoLayout* layout = pango_cairo_create_layout(cr);
setPangoAttributes(this, run, layout);
gchar* utf8 = convertUniCharToUTF8(run.characters(), run.length(), 0, run.length());
pango_layout_set_text(layout, utf8, -1);
// Our layouts are single line
PangoLayoutLine* layoutLine = pango_layout_get_line_readonly(layout, 0);
// Get the region where this text will be laid out. We will use it to clip
// the Cairo context, for when we are only painting part of the text run and
// to calculate the size of the shadow buffer.
PangoRegionType partialRegion = 0;
char* start = g_utf8_offset_to_pointer(utf8, from);
char* end = g_utf8_offset_to_pointer(start, to - from);
int ranges[] = {start - utf8, end - utf8};
#if PLATFORM(GTK)
partialRegion = gdk_pango_layout_line_get_clip_region(layoutLine, 0, 0, ranges, 1);
#else
partialRegion = getClipRegionFromPangoLayoutLine(layoutLine, ranges);
#endif
drawGlyphsShadow(context, point, layoutLine, partialRegion);
cairo_save(cr);
cairo_translate(cr, point.x(), point.y());
float red, green, blue, alpha;
context->fillColor().getRGBA(red, green, blue, alpha);
cairo_set_source_rgba(cr, red, green, blue, alpha);
#if PLATFORM(GTK)
gdk_cairo_region(cr, partialRegion);
#else
appendRegionToCairoContext(cr, partialRegion);
#endif
cairo_clip(cr);
pango_cairo_show_layout_line(cr, layoutLine);
if (context->textDrawingMode() & TextModeStroke) {
Color strokeColor = context->strokeColor();
strokeColor.getRGBA(red, green, blue, alpha);
cairo_set_source_rgba(cr, red, green, blue, alpha);
pango_cairo_layout_line_path(cr, layoutLine);
cairo_set_line_width(cr, context->strokeThickness());
cairo_stroke(cr);
}
// Pango sometimes leaves behind paths we don't want
cairo_new_path(cr);
destroyPangoRegion(partialRegion);
g_free(utf8);
g_object_unref(layout);
cairo_restore(cr);
}
void Font::drawComplexText(GraphicsContext* context, const TextRun& run, const FloatPoint& point, int from, int to) const
{
cairo_t* cr = context->platformContext();
cairo_save(cr);
cairo_translate(cr, point.x(), point.y());
PangoLayout* layout = pango_cairo_create_layout(cr);
setPangoAttributes(this, run, layout);
gchar* utf8 = convertUniCharToUTF8(run.characters(), run.length(), 0, run.length());
pango_layout_set_text(layout, utf8, -1);
// Our layouts are single line
PangoLayoutLine* layoutLine = pango_layout_get_line_readonly(layout, 0);
GdkRegion* partialRegion = NULL;
if (to - from != run.length()) {
// Clip the region of the run to be rendered
char* start = g_utf8_offset_to_pointer(utf8, from);
char* end = g_utf8_offset_to_pointer(start, to - from);
int ranges[] = {start - utf8, end - utf8};
partialRegion = gdk_pango_layout_line_get_clip_region(layoutLine, 0, 0, ranges, 1);
gdk_region_shrink(partialRegion, 0, -pixelSize());
}
Color fillColor = context->fillColor();
float red, green, blue, alpha;
// Text shadow, inspired by FontMac
IntSize shadowSize;
int shadowBlur = 0;
Color shadowColor;
bool hasShadow = context->textDrawingMode() == cTextFill &&
context->getShadow(shadowSize, shadowBlur, shadowColor);
// TODO: Blur support
if (hasShadow) {
// Disable graphics context shadows (not yet implemented) and paint them manually
context->clearShadow();
Color shadowFillColor(shadowColor.red(), shadowColor.green(), shadowColor.blue(), shadowColor.alpha() * fillColor.alpha() / 255);
cairo_save(cr);
shadowFillColor.getRGBA(red, green, blue, alpha);
cairo_set_source_rgba(cr, red, green, blue, alpha);
cairo_translate(cr, shadowSize.width(), shadowSize.height());
if (partialRegion) {
gdk_cairo_region(cr, partialRegion);
cairo_clip(cr);
}
pango_cairo_show_layout_line(cr, layoutLine);
cairo_restore(cr);
}
fillColor.getRGBA(red, green, blue, alpha);
cairo_set_source_rgba(cr, red, green, blue, alpha);
if (partialRegion) {
gdk_cairo_region(cr, partialRegion);
cairo_clip(cr);
}
pango_cairo_show_layout_line(cr, layoutLine);
if (context->textDrawingMode() & cTextStroke) {
Color strokeColor = context->strokeColor();
strokeColor.getRGBA(red, green, blue, alpha);
cairo_set_source_rgba(cr, red, green, blue, alpha);
pango_cairo_layout_line_path(cr, layoutLine);
cairo_set_line_width(cr, context->strokeThickness());
cairo_stroke(cr);
}
// Re-enable the platform shadow we disabled earlier
if (hasShadow)
context->setShadow(shadowSize, shadowBlur, shadowColor);
// Pango sometimes leaves behind paths we don't want
cairo_new_path(cr);
if (partialRegion)
gdk_region_destroy(partialRegion);
g_free(utf8);
g_object_unref(layout);
cairo_restore(cr);
}
void RrFontDraw(XftDraw *d, RrTextureText *t, RrRect *area)
{
gint x,y,w;
XftColor c;
gint mw;
PangoRectangle rect;
PangoAttrList *attrlist;
PangoEllipsizeMode ell;
g_assert(!t->flow || t->maxwidth > 0);
y = area->y;
if (!t->flow)
/* center the text vertically
We do this centering based on the 'baseline' since different fonts
have different top edges. It looks bad when the whole string is
moved when 1 character from a non-default language is included in
the string */
y += font_calculate_baseline(t->font, area->height);
/* the +2 and -4 leave a small blank edge on the sides */
x = area->x + 2;
w = area->width;
if (t->flow) w = MAX(w, t->maxwidth);
w -= 4;
/* h = area->height; */
if (t->flow)
ell = PANGO_ELLIPSIZE_NONE;
else {
switch (t->ellipsize) {
case RR_ELLIPSIZE_NONE:
ell = PANGO_ELLIPSIZE_NONE;
break;
case RR_ELLIPSIZE_START:
ell = PANGO_ELLIPSIZE_START;
break;
case RR_ELLIPSIZE_MIDDLE:
ell = PANGO_ELLIPSIZE_MIDDLE;
break;
case RR_ELLIPSIZE_END:
ell = PANGO_ELLIPSIZE_END;
break;
default:
g_assert_not_reached();
}
}
pango_layout_set_text(t->font->layout, t->string, -1);
pango_layout_set_width(t->font->layout, w * PANGO_SCALE);
pango_layout_set_ellipsize(t->font->layout, ell);
pango_layout_set_single_paragraph_mode(t->font->layout, !t->flow);
/* * * end of setting up the layout * * */
pango_layout_get_pixel_extents(t->font->layout, NULL, &rect);
mw = rect.width;
/* pango_layout_set_alignment doesn't work with
pango_xft_render_layout_line */
switch (t->justify) {
case RR_JUSTIFY_LEFT:
break;
case RR_JUSTIFY_RIGHT:
x += (w - mw);
break;
case RR_JUSTIFY_CENTER:
x += (w - mw) / 2;
break;
case RR_JUSTIFY_NUM_TYPES:
g_assert_not_reached();
}
if (t->shadow_offset_x || t->shadow_offset_y) {
/* From nvidia's readme (chapter 23):
When rendering to a 32-bit window, keep in mind that the X RENDER
extension, used by most composite managers, expects "premultiplied
alpha" colors. This means that if your color has components (r,g,b)
and alpha value a, then you must render (a*r, a*g, a*b, a) into the
target window.
*/
c.color.red = (t->shadow_color->r | t->shadow_color->r << 8) *
t->shadow_alpha / 255;
c.color.green = (t->shadow_color->g | t->shadow_color->g << 8) *
t->shadow_alpha / 255;
c.color.blue = (t->shadow_color->b | t->shadow_color->b << 8) *
t->shadow_alpha / 255;
c.color.alpha = 0xffff * t->shadow_alpha / 255;
c.pixel = t->shadow_color->pixel;
/* see below... */
if (!t->flow) {
pango_xft_render_layout_line
(d, &c,
#if PANGO_VERSION_MAJOR > 1 || \
(PANGO_VERSION_MAJOR == 1 && PANGO_VERSION_MINOR >= 16)
pango_layout_get_line_readonly(t->font->layout, 0),
#else
pango_layout_get_line(t->font->layout, 0),
#endif
(x + t->shadow_offset_x) * PANGO_SCALE,
(y + t->shadow_offset_y) * PANGO_SCALE);
}
else {
pango_xft_render_layout(d, &c, t->font->layout,
(x + t->shadow_offset_x) * PANGO_SCALE,
(y + t->shadow_offset_y) * PANGO_SCALE);
}
}
c.color.red = t->color->r | t->color->r << 8;
c.color.green = t->color->g | t->color->g << 8;
c.color.blue = t->color->b | t->color->b << 8;
c.color.alpha = 0xff | 0xff << 8; /* fully opaque text */
c.pixel = t->color->pixel;
if (t->shortcut) {
const gchar *s = t->string + t->shortcut_pos;
t->font->shortcut_underline->start_index = t->shortcut_pos;
t->font->shortcut_underline->end_index = t->shortcut_pos +
(g_utf8_next_char(s) - s);
/* the attributes are owned by the layout.
re-add the attributes to the layout after changing the
start and end index */
attrlist = pango_layout_get_attributes(t->font->layout);
pango_attr_list_ref(attrlist);
pango_layout_set_attributes(t->font->layout, attrlist);
pango_attr_list_unref(attrlist);
}
/* layout_line() uses y to specify the baseline
The line doesn't need to be freed, it's a part of the layout */
if (!t->flow) {
pango_xft_render_layout_line
(d, &c,
#if PANGO_VERSION_MAJOR > 1 || \
(PANGO_VERSION_MAJOR == 1 && PANGO_VERSION_MINOR >= 16)
pango_layout_get_line_readonly(t->font->layout, 0),
#else
pango_layout_get_line(t->font->layout, 0),
#endif
x * PANGO_SCALE,
y * PANGO_SCALE);
}
else {
pango_xft_render_layout(d, &c, t->font->layout,
x * PANGO_SCALE,
y * PANGO_SCALE);
}
if (t->shortcut) {
t->font->shortcut_underline->start_index = 0;
t->font->shortcut_underline->end_index = 0;
/* the attributes are owned by the layout.
re-add the attributes to the layout after changing the
start and end index */
attrlist = pango_layout_get_attributes(t->font->layout);
pango_attr_list_ref(attrlist);
pango_layout_set_attributes(t->font->layout, attrlist);
pango_attr_list_unref(attrlist);
}
}
static uint32_t render_detailed(cairo_t *cairo, struct swaynag *swaynag,
uint32_t y) {
uint32_t width = swaynag->width * swaynag->scale;
int border = swaynag->type->details_border_thickness * swaynag->scale;
int padding = swaynag->type->message_padding * swaynag->scale;
int decor = padding + border;
swaynag->details.x = decor;
swaynag->details.y = y * swaynag->scale + decor;
swaynag->details.width = width - decor * 2;
PangoLayout *layout = get_pango_layout(cairo, swaynag->type->font,
swaynag->details.message, swaynag->scale, false);
pango_layout_set_width(layout,
(swaynag->details.width - padding * 2) * PANGO_SCALE);
pango_layout_set_wrap(layout, PANGO_WRAP_WORD_CHAR);
pango_layout_set_single_paragraph_mode(layout, false);
pango_cairo_update_layout(cairo, layout);
swaynag->details.total_lines = pango_layout_get_line_count(layout);
PangoLayoutLine *line;
line = pango_layout_get_line_readonly(layout, swaynag->details.offset);
gint offset = line->start_index;
const char *text = pango_layout_get_text(layout);
pango_layout_set_text(layout, text + offset, strlen(text) - offset);
int text_width, text_height;
pango_cairo_update_layout(cairo, layout);
pango_layout_get_pixel_size(layout, &text_width, &text_height);
bool show_buttons = swaynag->details.offset > 0;
int button_width = get_detailed_scroll_button_width(cairo, swaynag);
if (show_buttons) {
swaynag->details.width -= button_width;
pango_layout_set_width(layout,
(swaynag->details.width - padding * 2) * PANGO_SCALE);
}
uint32_t ideal_height;
do {
ideal_height = swaynag->details.y + text_height + decor + padding * 2;
if (ideal_height > SWAYNAG_MAX_HEIGHT) {
ideal_height = SWAYNAG_MAX_HEIGHT;
if (!show_buttons) {
show_buttons = true;
swaynag->details.width -= button_width;
pango_layout_set_width(layout,
(swaynag->details.width - padding * 2) * PANGO_SCALE);
}
}
swaynag->details.height = ideal_height - swaynag->details.y - decor;
pango_layout_set_height(layout,
(swaynag->details.height - padding * 2) * PANGO_SCALE);
pango_layout_set_ellipsize(layout, PANGO_ELLIPSIZE_END);
pango_cairo_update_layout(cairo, layout);
pango_layout_get_pixel_size(layout, &text_width, &text_height);
} while (text_height != (swaynag->details.height - padding * 2));
swaynag->details.visible_lines = pango_layout_get_line_count(layout);
if (show_buttons) {
swaynag->details.button_up.x =
swaynag->details.x + swaynag->details.width;
swaynag->details.button_up.y = swaynag->details.y;
swaynag->details.button_up.width = button_width;
swaynag->details.button_up.height = swaynag->details.height / 2;
render_details_scroll_button(cairo, swaynag,
&swaynag->details.button_up);
swaynag->details.button_down.x =
swaynag->details.x + swaynag->details.width;
swaynag->details.button_down.y =
swaynag->details.button_up.y + swaynag->details.button_up.height;
swaynag->details.button_down.width = button_width;
swaynag->details.button_down.height = swaynag->details.height / 2;
render_details_scroll_button(cairo, swaynag,
&swaynag->details.button_down);
}
cairo_set_source_u32(cairo, swaynag->type->border);
cairo_rectangle(cairo, swaynag->details.x, swaynag->details.y,
swaynag->details.width, swaynag->details.height);
cairo_fill(cairo);
cairo_move_to(cairo, swaynag->details.x + padding,
swaynag->details.y + padding);
cairo_set_source_u32(cairo, swaynag->type->text);
pango_cairo_show_layout(cairo, layout);
g_object_unref(layout);
return ideal_height / swaynag->scale;
}
