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rofi/source/textbox.c
QC 2590ecf7e5 ADd new coloring scheme.
2015-04-06 17:13:26 +02:00

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/**
* MIT/X11 License
* Copyright (c) 2012 Sean Pringle <sean.pringle@gmail.com>
* Modified (c) 2013-2015 Qball Cow <qball@gmpclient.org>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <config.h>
#include <X11/X.h>
#include <X11/Xatom.h>
#include <X11/Xlib.h>
#include <X11/Xmd.h>
#include <X11/Xutil.h>
#include <X11/Xproto.h>
#include <X11/keysym.h>
#include <X11/XKBlib.h>
#include <X11/Xft/Xft.h>
#include <ctype.h>
#include "rofi.h"
#include "textbox.h"
#include <glib.h>
#define SIDE_MARGIN 1
extern Display *display;
/**
* Font + font color cache.
* Avoid re-loading font on every change on every textbox.
*/
XVisualInfo *visual_info;
Colormap target_colormap;
typedef struct _RowColor
{
XftColor fg;
XftColor bg;
XftColor bgalt;
XftColor hlfg;
XftColor hlbg;
} RowColor;
#define num_states 3
RowColor colors[num_states];
PangoContext *p_context = NULL;
// Xft text box, optionally editable
textbox* textbox_create ( Window parent,
XVisualInfo *vinfo,
Colormap map,
TextboxFlags flags,
short x, short y, short w, short h,
TextBoxFontType tbft,
const char *text )
{
textbox *tb = g_malloc0 ( sizeof ( textbox ) );
tb->flags = flags;
tb->parent = parent;
tb->x = x;
tb->y = y;
tb->w = MAX ( 1, w );
tb->h = MAX ( 1, h );
tb->layout = pango_layout_new ( p_context );
unsigned int cp;
switch ( tbft )
{
case HIGHLIGHT:
cp = colors[NORMAL].hlbg.pixel;
break;
case ALT:
cp = colors[NORMAL].bgalt.pixel;
break;
default:
cp = colors[NORMAL].bg.pixel;
break;
}
XSetWindowAttributes attr;
attr.colormap = map;
attr.border_pixel = cp;
attr.background_pixel = cp;
tb->window = XCreateWindow ( display, tb->parent, tb->x, tb->y, tb->w, tb->h, 0, vinfo->depth,
InputOutput, vinfo->visual, CWColormap | CWBorderPixel | CWBackPixel, &attr );
PangoFontDescription *pfd = pango_font_description_from_string ( config.menu_font );
pango_layout_set_font_description ( tb->layout, pfd );
pango_font_description_free ( pfd );
textbox_font ( tb, tbft );
textbox_text ( tb, text ? text : "" );
textbox_cursor_end ( tb );
// auto height/width modes get handled here
textbox_moveresize ( tb, tb->x, tb->y, tb->w, tb->h );
// edit mode controls
if ( tb->flags & TB_EDITABLE ) {
tb->xim = XOpenIM ( display, NULL, NULL, NULL );
tb->xic = XCreateIC ( tb->xim, XNInputStyle, XIMPreeditNothing | XIMStatusNothing, XNClientWindow, tb->window, XNFocusWindow, tb->window, NULL );
}
else {
XSelectInput ( display, tb->window, ButtonPressMask );
}
return tb;
}
// set an Xft font by name
void textbox_font ( textbox *tb, TextBoxFontType tbft )
{
RowColor *color = &( colors[tbft & STATE_MASK] );
switch ( ( tbft & FMOD_MASK ) )
{
case HIGHLIGHT:
tb->color_bg = color->hlbg;
tb->color_fg = color->hlfg;
break;
case ALT:
tb->color_bg = color->bgalt;
tb->color_fg = color->fg;
break;
default:
tb->color_bg = color->bg;
tb->color_fg = color->fg;
break;
}
tb->tbft = tbft;
}
// set the default text to display
void textbox_text ( textbox *tb, const char *text )
{
g_free ( tb->text );
const gchar *last_pointer = NULL;
if ( g_utf8_validate ( text, -1, &last_pointer ) ) {
tb->text = g_strdup ( text );
}
else {
if ( last_pointer != NULL ) {
// Copy string up to invalid character.
tb->text = g_strndup ( text, ( last_pointer - text ) );
}
else {
tb->text = g_strdup ( "Invalid UTF-8 string." );
}
}
pango_layout_set_text ( tb->layout, tb->text, strlen ( tb->text ) );
if ( tb->flags & TB_AUTOWIDTH ) {
textbox_moveresize ( tb, tb->x, tb->y, tb->w, tb->h );
}
tb->cursor = MAX ( 0, MIN ( ( int ) strlen ( text ), tb->cursor ) );
}
void textbox_move ( textbox *tb, int x, int y )
{
if ( x != tb->x || y != tb->y ) {
tb->x = x;
tb->y = y;
XMoveResizeWindow ( display, tb->window, tb->x, tb->y, tb->w, tb->h );
}
}
// within the parent handled auto width/height modes
void textbox_moveresize ( textbox *tb, int x, int y, int w, int h )
{
if ( tb->flags & TB_AUTOHEIGHT ) {
h = textbox_get_height ( tb );
}
if ( tb->flags & TB_AUTOWIDTH ) {
pango_layout_set_width ( tb->layout, -1 );
if ( w > 1 ) {
w = MIN ( w, textbox_get_width ( tb ) );
}
else{
w = textbox_get_width ( tb );
}
}
else {
// set ellipsize
if ( ( tb->flags & TB_EDITABLE ) == TB_EDITABLE ) {
pango_layout_set_ellipsize ( tb->layout, PANGO_ELLIPSIZE_MIDDLE );
}
else{
pango_layout_set_ellipsize ( tb->layout, PANGO_ELLIPSIZE_END );
}
}
if ( x != tb->x || y != tb->y || w != tb->w || h != tb->h ) {
tb->x = x;
tb->y = y;
tb->w = MAX ( 1, w );
tb->h = MAX ( 1, h );
XMoveResizeWindow ( display, tb->window, tb->x, tb->y, tb->w, tb->h );
pango_layout_set_width ( tb->layout, PANGO_SCALE * ( tb->w - 2 * SIDE_MARGIN ) );
}
}
void textbox_show ( textbox *tb )
{
XMapWindow ( display, tb->window );
}
void textbox_hide ( textbox *tb )
{
XUnmapWindow ( display, tb->window );
}
// will also unmap the window if still displayed
void textbox_free ( textbox *tb )
{
if ( tb == NULL ) {
return;
}
if ( tb->flags & TB_EDITABLE ) {
XDestroyIC ( tb->xic );
XCloseIM ( tb->xim );
}
g_free ( tb->text );
if ( tb->layout != NULL ) {
g_object_unref ( tb->layout );
}
XDestroyWindow ( display, tb->window );
g_free ( tb );
}
void textbox_draw ( textbox *tb )
{
GC context = XCreateGC ( display, tb->window, 0, 0 );
Pixmap canvas = XCreatePixmap ( display, tb->window, tb->w, tb->h, visual_info->depth );
XftDraw *draw = XftDrawCreate ( display, canvas, visual_info->visual, target_colormap );
// clear canvas
XftDrawRect ( draw, &tb->color_bg, 0, 0, tb->w, tb->h );
char *text = tb->text ? tb->text : "";
int text_len = strlen ( text );
int font_height = textbox_get_font_height ( tb );
int cursor_x = 0;
int cursor_width = MAX ( 2, font_height / 10 );
pango_layout_set_text ( tb->layout, text, text_len );
if ( tb->flags & TB_EDITABLE ) {
PangoRectangle pos;
int cursor_offset = 0;
cursor_offset = MIN ( tb->cursor, text_len );
pango_layout_get_cursor_pos ( tb->layout, cursor_offset, &pos, NULL );
// Add a small 4px offset between cursor and last glyph.
cursor_x = pos.x / PANGO_SCALE;
}
// pango_layout_set_width ( tb->layout, PANGO_SCALE * ( tb->w - 2 * SIDE_MARGIN ) );
// Skip the side MARGIN on the X axis.
int x = PANGO_SCALE * SIDE_MARGIN;
int y = 0;
if ( tb->flags & TB_RIGHT ) {
int line_width = 0;
// Get actual width.
pango_layout_get_pixel_size ( tb->layout, &line_width, NULL );
x = ( tb->w - line_width - SIDE_MARGIN ) * PANGO_SCALE;
}
else if ( tb->flags & TB_CENTER ) {
int tw = textbox_get_font_width ( tb );
x = ( PANGO_SCALE * ( tb->w - tw - 2 * SIDE_MARGIN ) ) / 2;
}
y = ( PANGO_SCALE * ( tb->h - textbox_get_font_height ( tb ) ) ) / 2;
// Render the layout.
pango_xft_render_layout ( draw, &( tb->color_fg ), tb->layout, x, y );
// draw the cursor
if ( tb->flags & TB_EDITABLE ) {
XftDrawRect ( draw, &tb->color_fg,
x / PANGO_SCALE + cursor_x, y / PANGO_SCALE, // Align with font
cursor_width, font_height );
}
// flip canvas to window
// XClearWindow ( display, tb->window);
XCopyArea ( display, canvas, tb->window, context, 0, 0, tb->w, tb->h, 0, 0 );
XFreeGC ( display, context );
XftDrawDestroy ( draw );
XFreePixmap ( display, canvas );
}
// cursor handling for edit mode
void textbox_cursor ( textbox *tb, int pos )
{
int length = ( tb->text == NULL ) ? 0 : strlen ( tb->text );
tb->cursor = MAX ( 0, MIN ( length, pos ) );
}
// move right
void textbox_cursor_inc ( textbox *tb )
{
int index = g_utf8_next_char ( &( tb->text[tb->cursor] ) ) - tb->text;
textbox_cursor ( tb, index );
}
// move left
void textbox_cursor_dec ( textbox *tb )
{
int index = g_utf8_prev_char ( &( tb->text[tb->cursor] ) ) - tb->text;
textbox_cursor ( tb, index );
}
// Move word right
static void textbox_cursor_inc_word ( textbox *tb )
{
if ( tb->text == NULL ) {
return;
}
// Find word boundaries, with pango_Break?
gchar *c = &( tb->text[tb->cursor] );
while ( ( c = g_utf8_next_char ( c ) ) ) {
gunichar uc = g_utf8_get_char ( c );
GUnicodeBreakType bt = g_unichar_break_type ( uc );
if ( (
bt == G_UNICODE_BREAK_ALPHABETIC ||
bt == G_UNICODE_BREAK_HEBREW_LETTER ||
bt == G_UNICODE_BREAK_NUMERIC ||
bt == G_UNICODE_BREAK_QUOTATION
)
) {
break;
}
}
if ( c == NULL ) {
return;
}
while ( ( c = g_utf8_next_char ( c ) ) ) {
gunichar uc = g_utf8_get_char ( c );
GUnicodeBreakType bt = g_unichar_break_type ( uc );
if ( !(
bt == G_UNICODE_BREAK_ALPHABETIC ||
bt == G_UNICODE_BREAK_HEBREW_LETTER ||
bt == G_UNICODE_BREAK_NUMERIC ||
bt == G_UNICODE_BREAK_QUOTATION
)
) {
break;
}
}
int index = c - tb->text;
textbox_cursor ( tb, index );
}
// move word left
static void textbox_cursor_dec_word ( textbox *tb )
{
// Find word boundaries, with pango_Break?
gchar *n;
gchar *c = &( tb->text[tb->cursor] );
while ( ( c = g_utf8_prev_char ( c ) ) && c != tb->text ) {
gunichar uc = g_utf8_get_char ( c );
GUnicodeBreakType bt = g_unichar_break_type ( uc );
if ( (
bt == G_UNICODE_BREAK_ALPHABETIC ||
bt == G_UNICODE_BREAK_HEBREW_LETTER ||
bt == G_UNICODE_BREAK_NUMERIC ||
bt == G_UNICODE_BREAK_QUOTATION
)
) {
break;
}
}
if ( c != tb->text ) {
while ( ( n = g_utf8_prev_char ( c ) ) ) {
gunichar uc = g_utf8_get_char ( n );
GUnicodeBreakType bt = g_unichar_break_type ( uc );
if ( !(
bt == G_UNICODE_BREAK_ALPHABETIC ||
bt == G_UNICODE_BREAK_HEBREW_LETTER ||
bt == G_UNICODE_BREAK_NUMERIC ||
bt == G_UNICODE_BREAK_QUOTATION
)
) {
break;
}
c = n;
if ( n == tb->text ) {
break;
}
}
}
int index = c - tb->text;
textbox_cursor ( tb, index );
}
// end of line
void textbox_cursor_end ( textbox *tb )
{
tb->cursor = ( int ) strlen ( tb->text );
}
// insert text
void textbox_insert ( textbox *tb, int pos, char *str )
{
int len = ( int ) strlen ( tb->text ), slen = ( int ) strlen ( str );
pos = MAX ( 0, MIN ( len, pos ) );
// expand buffer
tb->text = g_realloc ( tb->text, len + slen + 1 );
// move everything after cursor upward
char *at = tb->text + pos;
memmove ( at + slen, at, len - pos + 1 );
// insert new str
memmove ( at, str, slen );
}
// remove text
void textbox_delete ( textbox *tb, int pos, int dlen )
{
int len = strlen ( tb->text );
pos = MAX ( 0, MIN ( len, pos ) );
// move everything after pos+dlen down
char *at = tb->text + pos;
// Move remainder + closing \0
memmove ( at, at + dlen, len - pos - dlen + 1 );
if ( tb->cursor >= pos && tb->cursor < ( pos + dlen ) ) {
tb->cursor = pos;
}
else if ( tb->cursor >= ( pos + dlen ) ) {
tb->cursor -= dlen;
}
}
// delete on character
void textbox_cursor_del ( textbox *tb )
{
if ( tb->text == NULL ) {
return;
}
int index = g_utf8_next_char ( &( tb->text[tb->cursor] ) ) - tb->text;
textbox_delete ( tb, tb->cursor, index - tb->cursor );
}
// back up and delete one character
void textbox_cursor_bkspc ( textbox *tb )
{
if ( tb->cursor > 0 ) {
textbox_cursor_dec ( tb );
textbox_cursor_del ( tb );
}
}
static void textbox_cursor_bkspc_word ( textbox *tb )
{
if ( tb->cursor > 0 ) {
int cursor = tb->cursor;
textbox_cursor_dec_word ( tb );
if ( cursor > tb->cursor ) {
textbox_delete ( tb, tb->cursor, cursor - tb->cursor );
}
}
}
static void textbox_cursor_del_word ( textbox *tb )
{
if ( tb->cursor >= 0 ) {
int cursor = tb->cursor;
textbox_cursor_inc_word ( tb );
if ( cursor < tb->cursor ) {
textbox_delete ( tb, cursor, tb->cursor - cursor );
}
}
}
// handle a keypress in edit mode
// 0 = unhandled
// 1 = handled
// -1 = handled and return pressed (finished)
int textbox_keypress ( textbox *tb, XEvent *ev )
{
KeySym key;
Status stat;
char pad[32];
int len;
if ( !( tb->flags & TB_EDITABLE ) ) {
return 0;
}
len = Xutf8LookupString ( tb->xic, &ev->xkey, pad, sizeof ( pad ), &key, &stat );
pad[len] = 0;
// Left or Ctrl-b
if ( key == XK_Left ||
( ( ev->xkey.state & ControlMask ) && key == XK_b ) ) {
textbox_cursor_dec ( tb );
return 1;
}
// Right or Ctrl-F
else if ( key == XK_Right ||
( ( ev->xkey.state & ControlMask ) && key == XK_f ) ) {
textbox_cursor_inc ( tb );
return 1;
}
// Ctrl-U: Kill from the beginning to the end of the line.
else if ( ( ev->xkey.state & ControlMask ) && key == XK_u ) {
textbox_text ( tb, "" );
return 1;
}
// Ctrl-A
else if ( ( ev->xkey.state & ControlMask ) && key == XK_a ) {
textbox_cursor ( tb, 0 );
return 1;
}
// Ctrl-E
else if ( ( ev->xkey.state & ControlMask ) && key == XK_e ) {
textbox_cursor_end ( tb );
return 1;
}
// Ctrl-Alt-h
else if ( ( ev->xkey.state & ControlMask ) &&
( ev->xkey.state & Mod1Mask ) && key == XK_h ) {
textbox_cursor_bkspc_word ( tb );
return 1;
}
// Ctrl-Alt-d
else if ( ( ev->xkey.state & ControlMask ) &&
( ev->xkey.state & Mod1Mask ) && key == XK_d ) {
textbox_cursor_del_word ( tb );
return 1;
} // Delete or Ctrl-D
else if ( key == XK_Delete ||
( ( ev->xkey.state & ControlMask ) && key == XK_d ) ) {
textbox_cursor_del ( tb );
return 1;
}
// Alt-B
else if ( ( ev->xkey.state & Mod1Mask ) && key == XK_b ) {
textbox_cursor_dec_word ( tb );
return 1;
}
// Alt-F
else if ( ( ev->xkey.state & Mod1Mask ) && key == XK_f ) {
textbox_cursor_inc_word ( tb );
return 1;
}
// BackSpace, Ctrl-h
else if ( key == XK_BackSpace ||
( ( ev->xkey.state & ControlMask ) && key == XK_h ) ) {
textbox_cursor_bkspc ( tb );
return 1;
}
else if ( ( ev->xkey.state & ControlMask ) && ( key == XK_Return || key == XK_KP_Enter ) ) {
return -2;
}
else if ( key == XK_Return || key == XK_KP_Enter ||
( ( ev->xkey.state & ControlMask ) && key == XK_j ) ||
( ( ev->xkey.state & ControlMask ) && key == XK_m ) ) {
return -1;
}
else if ( !iscntrl ( *pad ) ) {
textbox_insert ( tb, tb->cursor, pad );
textbox_cursor_inc ( tb );
return 1;
}
return 0;
}
/***
* Font setup.
*/
static void parse_color ( Visual *visual, Colormap colormap,
const char *bg, XftColor *color )
{
if ( bg == NULL ) {
return;
}
if ( strncmp ( bg, "argb:", 5 ) == 0 ) {
XRenderColor col;
unsigned int val = strtoul ( &bg[5], NULL, 16 );
col.alpha = ( ( val & 0xFF000000 ) >> 24 ) * 255;
col.red = ( ( val & 0x00FF0000 ) >> 16 ) * 255;
col.green = ( ( val & 0x0000FF00 ) >> 8 ) * 255;
col.blue = ( ( val & 0x000000FF ) ) * 255;
XftColorAllocValue ( display, visual, colormap, &col, color );
}
else {
XftColorAllocName ( display, visual, colormap, bg, color );
}
}
#if 1
static void textbox_parse_string ( XVisualInfo *visual, Colormap colormap, const char *str, RowColor *color )
{
if ( str == NULL ) {
return;
}
char *cstr = g_strdup ( str );
char *endp;
char *token;
int index = 0;
for ( token = strtok_r ( cstr, ",", &endp ); token != NULL; token = strtok_r ( NULL, ",", &endp ) ) {
switch ( index )
{
case 0:
parse_color ( visual->visual, colormap, token, &( color->bg ) );
break;
case 1:
parse_color ( visual->visual, colormap, token, &( color->fg ) );
break;
case 2:
parse_color ( visual->visual, colormap, token, &( color->bgalt ) );
break;
case 3:
parse_color ( visual->visual, colormap, token, &( color->hlbg ) );
break;
case 4:
parse_color ( visual->visual, colormap, token, &( color->hlfg ) );
break;
}
index++;
}
g_free ( cstr );
}
#endif
void textbox_setup ( XVisualInfo *visual, Colormap colormap )
{
visual_info = visual;
target_colormap = colormap;
textbox_parse_string ( visual_info->visual, target_colormap,
config.color_normal, &( colors[NORMAL] ) );
textbox_parse_string ( visual_info->visual, target_colormap,
config.color_urgent, &( colors[URGENT] ) );
textbox_parse_string ( visual_info->visual, target_colormap,
config.color_active, &( colors[ACTIVE] ) );
#if 1
parse_color ( visual_info->visual, target_colormap, config.menu_bg, &( colors[NORMAL].bg ) );
parse_color ( visual_info->visual, target_colormap, config.menu_fg, &( colors[NORMAL].fg ) );
parse_color ( visual_info->visual, target_colormap, config.menu_bg_alt, &( colors[NORMAL].bgalt ) );
parse_color ( visual_info->visual, target_colormap, config.menu_hlfg, &( colors[NORMAL].hlfg ) );
parse_color ( visual_info->visual, target_colormap, config.menu_hlbg, &( colors[NORMAL].hlbg ) );
parse_color ( visual_info->visual, target_colormap, config.menu_bg_urgent, &( colors[URGENT].bg ) );
parse_color ( visual_info->visual, target_colormap, config.menu_fg_urgent, &( colors[URGENT].fg ) );
parse_color ( visual_info->visual, target_colormap, config.menu_bg_alt, &( colors[URGENT].bgalt ) );
parse_color ( visual_info->visual, target_colormap, config.menu_hlfg_urgent, &( colors[URGENT].hlfg ) );
parse_color ( visual_info->visual, target_colormap, config.menu_hlbg_urgent, &( colors[URGENT].hlbg ) );
parse_color ( visual_info->visual, target_colormap, config.menu_bg_active, &( colors[ACTIVE].bg ) );
parse_color ( visual_info->visual, target_colormap, config.menu_fg_active, &( colors[ACTIVE].fg ) );
parse_color ( visual_info->visual, target_colormap, config.menu_bg_alt, &( colors[ACTIVE].bgalt ) );
parse_color ( visual_info->visual, target_colormap, config.menu_hlfg_active, &( colors[ACTIVE].hlfg ) );
parse_color ( visual_info->visual, target_colormap, config.menu_hlbg_active, &( colors[ACTIVE].hlbg ) );
#endif
PangoFontMap *font_map = pango_xft_get_font_map ( display, DefaultScreen ( display ) );
p_context = pango_font_map_create_context ( font_map );
}
static void textbox_clean_rowcolor ( RowColor * color )
{
XftColorFree ( display, visual_info->visual, target_colormap,
&( color->fg ) );
XftColorFree ( display, visual_info->visual, target_colormap,
&( color->bg ) );
XftColorFree ( display, visual_info->visual, target_colormap,
&( color->bgalt ) );
XftColorFree ( display, visual_info->visual, target_colormap,
&( color->hlfg ) );
XftColorFree ( display, visual_info->visual, target_colormap,
&( color->hlbg ) );
}
void textbox_cleanup ( void )
{
if ( p_context ) {
for ( unsigned int st = 0; st < num_states; st++ ) {
textbox_clean_rowcolor ( &colors[st] );
}
g_object_unref ( p_context );
p_context = NULL;
visual_info = NULL;
target_colormap = None;
}
}
int textbox_get_width ( textbox *tb )
{
return textbox_get_font_width ( tb ) + 2 * SIDE_MARGIN;
}
int textbox_get_height ( textbox *tb )
{
return textbox_get_font_height ( tb ) + 2 * SIDE_MARGIN;
}
int textbox_get_font_height ( textbox *tb )
{
int height;
pango_layout_get_pixel_size ( tb->layout, NULL, &height );
return height;
}
int textbox_get_font_width ( textbox *tb )
{
int width;
pango_layout_get_pixel_size ( tb->layout, &width, NULL );
return width;
}
double textbox_get_estimated_char_width ( void )
{
// Create a temp layout with right font.
PangoLayout *layout = pango_layout_new ( p_context );
// Set font.
PangoFontDescription *pfd = pango_font_description_from_string ( config.menu_font );
pango_layout_set_font_description ( layout, pfd );
pango_font_description_free ( pfd );
// Get width
PangoContext *context = pango_layout_get_context ( layout );
PangoFontMetrics *metric = pango_context_get_metrics ( context, NULL, NULL );
int width = pango_font_metrics_get_approximate_char_width ( metric );
pango_font_metrics_unref ( metric );
g_object_unref ( layout );
return ( width ) / (double) PANGO_SCALE;
}
int textbox_get_estimated_char_height ( void )
{
// Create a temp layout with right font.
PangoLayout *layout = pango_layout_new ( p_context );
// Set font.
PangoFontDescription *pfd = pango_font_description_from_string ( config.menu_font );
pango_layout_set_font_description ( layout, pfd );
pango_font_description_free ( pfd );
// Get width
PangoContext *context = pango_layout_get_context ( layout );
PangoFontMetrics *metric = pango_context_get_metrics ( context, NULL, NULL );
int height = pango_font_metrics_get_ascent ( metric ) + pango_font_metrics_get_descent ( metric );
pango_font_metrics_unref ( metric );
g_object_unref ( layout );
return ( height ) / PANGO_SCALE + 2 * SIDE_MARGIN;
}
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