boost::optional<Geom::Point> Line::intersection_with_viewbox (SPDesktop *desktop)
{
Geom::Rect vb = desktop->get_display_area();
/* remaining viewbox corners */
Geom::Point ul (vb.min()[Geom::X], vb.max()[Geom::Y]);
Geom::Point lr (vb.max()[Geom::X], vb.min()[Geom::Y]);
std::pair <Geom::Point, Geom::Point> e = side_of_intersection (vb.min(), lr, vb.max(), ul, this->pt, this->v_dir);
if (e.first == e.second) {
// perspective line lies outside the canvas
return boost::optional<Geom::Point>();
}
Line line (e.first, e.second);
return this->intersect (line);
}
std::vector<Geom::Point> Layout::createSelectionShape(iterator const &it_start, iterator const &it_end, Geom::Affine const &transform) const
{
std::vector<Geom::Point> quads;
unsigned char_index;
unsigned end_char_index;
if (it_start._char_index < it_end._char_index) {
char_index = it_start._char_index;
end_char_index = it_end._char_index;
} else {
char_index = it_end._char_index;
end_char_index = it_start._char_index;
}
for ( ; char_index < end_char_index ; ) {
if (_characters[char_index].in_glyph == -1) {
char_index++;
continue;
}
double char_rotation = _glyphs[_characters[char_index].in_glyph].rotation;
unsigned span_index = _characters[char_index].in_span;
Geom::Point top_left, bottom_right;
if (_path_fitted || char_rotation != 0.0) {
Geom::Rect box = characterBoundingBox(iterator(this, char_index), &char_rotation);
top_left = box.min();
bottom_right = box.max();
char_index++;
} else { // for straight text we can be faster by combining all the character boxes in a span into one box
double span_x = _spans[span_index].x_start + _spans[span_index].chunk(this).left_x;
top_left[Geom::X] = span_x + _characters[char_index].x;
while (char_index < end_char_index && _characters[char_index].in_span == span_index)
char_index++;
if (char_index == _characters.size() || _characters[char_index].in_span != span_index)
bottom_right[Geom::X] = _spans[span_index].x_end + _spans[span_index].chunk(this).left_x;
else
bottom_right[Geom::X] = span_x + _characters[char_index].x;
double baseline_y = _spans[span_index].line(this).baseline_y + _spans[span_index].baseline_shift;
double vertical_scale = _glyphs.back().vertical_scale;
if (_directions_are_orthogonal(_blockProgression(), TOP_TO_BOTTOM)) {
double span_height = vertical_scale * (_spans[span_index].line_height.ascent + _spans[span_index].line_height.descent);
top_left[Geom::Y] = top_left[Geom::X];
top_left[Geom::X] = baseline_y - span_height * 0.5;
bottom_right[Geom::Y] = bottom_right[Geom::X];
bottom_right[Geom::X] = baseline_y + span_height * 0.5;
} else {
top_left[Geom::Y] = baseline_y - vertical_scale * _spans[span_index].line_height.ascent;
bottom_right[Geom::Y] = baseline_y + vertical_scale * _spans[span_index].line_height.descent;
}
}
Geom::Rect char_box(top_left, bottom_right);
if (char_box.dimensions()[Geom::X] == 0.0 || char_box.dimensions()[Geom::Y] == 0.0)
continue;
Geom::Point center_of_rotation((top_left[Geom::X] + bottom_right[Geom::X]) * 0.5,
top_left[Geom::Y] + _spans[span_index].line_height.ascent);
Geom::Affine total_transform = Geom::Translate(-center_of_rotation) * Geom::Rotate(char_rotation) * Geom::Translate(center_of_rotation) * transform;
for(int i = 0; i < 4; i ++)
quads.push_back(char_box.corner(i) * total_transform);
}
return quads;
}
int main(int argc, char **argv) {
char const *const filename = (argc >= 2
? argv[1]
: "toy.svgd");
FILE* f = fopen(filename, "r");
if (!f) {
perror(filename);
return 1;
}
display_path = read_svgd(f);
Geom::Rect r = display_path.bbox();
display_path = display_path*Geom::translate(-r.min());
Geom::scale sc(r.max() - r.min());
display_path = display_path*(sc.inverse()*Geom::scale(500,500));
gtk_init (&argc, &argv);
gdk_rgb_init();
GtkWidget* window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_window_set_title(GTK_WINDOW(window), "text toy");
gtk_window_set_policy(GTK_WINDOW(window), TRUE, TRUE, TRUE);
gtk_signal_connect(GTK_OBJECT(window),
"delete_event",
GTK_SIGNAL_FUNC(delete_event_cb),
NULL);
gtk_widget_push_visual(gdk_rgb_get_visual());
gtk_widget_push_colormap(gdk_rgb_get_cmap());
canvas = gtk_drawing_area_new();
gtk_signal_connect(GTK_OBJECT (canvas),
"expose_event",
GTK_SIGNAL_FUNC(expose_event),
0);
gtk_widget_add_events(canvas, (GDK_BUTTON_PRESS_MASK |
GDK_BUTTON_RELEASE_MASK |
GDK_KEY_PRESS_MASK |
GDK_POINTER_MOTION_MASK));
gtk_signal_connect(GTK_OBJECT (canvas),
"button_press_event",
GTK_SIGNAL_FUNC(mouse_event),
0);
gtk_signal_connect(GTK_OBJECT (canvas),
"button_release_event",
GTK_SIGNAL_FUNC(mouse_release_event),
0);
gtk_signal_connect(GTK_OBJECT (canvas),
"motion_notify_event",
GTK_SIGNAL_FUNC(mouse_motion_event),
0);
gtk_signal_connect(GTK_OBJECT(canvas),
"key_press_event",
GTK_SIGNAL_FUNC(key_release_event),
0);
gtk_widget_pop_colormap();
gtk_widget_pop_visual();
GtkWidget *vb = gtk_vbox_new(0, 0);
gtk_container_add(GTK_CONTAINER(window), vb);
gtk_box_pack_start(GTK_BOX(vb), canvas, TRUE, TRUE, 0);
gtk_window_set_default_size(GTK_WINDOW(window), 600, 600);
gtk_widget_show_all(window);
dash_gc = gdk_gc_new(canvas->window);
gint8 dash_list[] = {4, 4};
gdk_gc_set_dashes(dash_gc, 0, dash_list, 2);
GdkColor colour;
colour.red = 0xffff;
colour.green = 0xffff;
colour.blue = 0xffff;
plain_gc = gdk_gc_new(canvas->window);
//gdk_gc_set_rgb_fg_color(dash_gc, &colour);
gdk_rgb_find_color(gtk_widget_get_colormap(canvas), &colour);
gdk_window_set_background(canvas->window, &colour);
gdk_gc_set_line_attributes(dash_gc, 1, GDK_LINE_ON_OFF_DASH,
GDK_CAP_BUTT,GDK_JOIN_MITER);
/* Make sure the canvas can receive key press events. */
GTK_WIDGET_SET_FLAGS(canvas, GTK_CAN_FOCUS);
assert(GTK_WIDGET_CAN_FOCUS(canvas));
gtk_widget_grab_focus(canvas);
assert(gtk_widget_is_focus(canvas));
gtk_main();
return 0;
}