102 lines
2.3 KiB
Go
102 lines
2.3 KiB
Go
package labelutils
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// #cgo pkg-config: gdk-3.0 gio-2.0 glib-2.0 gobject-2.0 gtk+-3.0
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// #include <glib.h>
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// #include <gtk/gtk.h>
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// #include <pango/pango.h>
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import "C"
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import (
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"unsafe"
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"github.com/gotk3/gotk3/gtk"
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"github.com/gotk3/gotk3/pango"
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)
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func gbool(b bool) C.gboolean {
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if b {
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return C.gboolean(C.TRUE)
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} else {
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return C.gboolean(C.FALSE)
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}
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}
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type Attribute = func() *C.PangoAttribute
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func InsertHyphens(hyphens bool) Attribute {
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return func() *C.PangoAttribute {
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return C.pango_attr_insert_hyphens_new(gbool(hyphens))
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}
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}
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func Scale(factor float64) Attribute {
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return func() *C.PangoAttribute {
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return C.pango_attr_scale_new(C.double(factor))
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}
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}
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func Underline(underline pango.Underline) Attribute {
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return func() *C.PangoAttribute {
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return C.pango_attr_underline_new(C.PangoUnderline(underline))
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}
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}
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func Strikethrough(strikethrough bool) Attribute {
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return func() *C.PangoAttribute {
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return C.pango_attr_strikethrough_new(gbool(strikethrough))
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}
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}
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const u16divu8 = 65535 / 255
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func rgb(hex uint32) (r, g, b uint16) {
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r = uint16(hex>>16&255) * u16divu8
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g = uint16(hex>>8&255) * u16divu8
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b = uint16(hex&255) * u16divu8
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return
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}
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func Background(hex uint32) Attribute {
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r, g, b := rgb(hex)
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return func() *C.PangoAttribute {
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return C.pango_attr_background_new(C.guint16(r), C.guint16(g), C.guint16(b))
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}
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}
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func Foreground(hex uint32) Attribute {
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r, g, b := rgb(hex)
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return func() *C.PangoAttribute {
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return C.pango_attr_foreground_new(C.guint16(r), C.guint16(g), C.guint16(b))
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}
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}
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func Style(style pango.Style) Attribute {
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return func() *C.PangoAttribute {
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return C.pango_attr_style_new(C.PangoStyle(style))
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}
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}
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func Family(family string) Attribute {
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return func() *C.PangoAttribute {
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str := C.CString(family)
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defer C.free(unsafe.Pointer(str))
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return C.pango_attr_family_new(str)
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}
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}
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func AddAttr(l *gtk.Label, attrs ...Attribute) {
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attrlist := C.pango_attr_list_new()
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defer C.pango_attr_list_unref(attrlist)
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for _, attr := range attrs {
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// attr() should not unref; insert is transfer-full
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// https://discourse.gnome.org/t/pango-how-to-turn-off-hyphenation-for-char-wrapping/2101/2
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C.pango_attr_list_insert(attrlist, attr())
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}
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v := (*C.GtkLabel)(unsafe.Pointer(l.Native()))
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C.gtk_label_set_attributes(v, attrlist)
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}
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