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rofi/source/widgets/textbox.c

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/*
* rofi
*
* MIT/X11 License
* Copyright © 2012 Sean Pringle <sean.pringle@gmail.com>
* Copyright © 2013-2017 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 <xcb/xcb.h>
#include <ctype.h>
#include <string.h>
#include <glib.h>
#include <math.h>
#include "widgets/textbox.h"
#include "keyb.h"
#include "helper.h"
#include "helper-theme.h"
#include "x11-helper.h"
#include "mode.h"
#include "view.h"
#include "theme.h"
#define DOT_OFFSET 15
static void textbox_draw ( widget *, cairo_t * );
static void textbox_free ( widget * );
static int textbox_get_width ( widget * );
static int _textbox_get_height ( widget * );
static void __textbox_update_pango_text ( textbox *tb );
/**
* @param tb Handle to the textbox
*
* Move the cursor to the end of the string.
*/
static void textbox_cursor_end ( textbox *tb );
/** Default pango context */
static PangoContext *p_context = NULL;
/** The pango font metrics */
static PangoFontMetrics *p_metrics = NULL;
/** Cache to hold font descriptions. This it to avoid having to lookup each time. */
typedef struct TBFontConfig
{
/** Font description */
PangoFontDescription *pfd;
/** Font metrics */
PangoFontMetrics *metrics;
}TBFontConfig;
/** HashMap of previously parsed font descriptions. */
static GHashTable *tbfc_cache = NULL;
static gboolean textbox_blink ( gpointer data )
{
textbox *tb = (textbox *) data;
if ( tb->blink < 2 ) {
tb->blink = !tb->blink;
widget_queue_redraw ( WIDGET ( tb ) );
rofi_view_queue_redraw ( );
}
else {
tb->blink--;
}
return TRUE;
}
static void textbox_resize ( widget *wid, short w, short h )
{
textbox *tb = (textbox *) wid;
textbox_moveresize ( tb, tb->widget.x, tb->widget.y, w, h );
}
static int textbox_get_desired_height ( widget *wid )
{
textbox *tb = (textbox *) wid;
if ( ( tb->flags & TB_AUTOHEIGHT ) == 0 ) {
return tb->widget.h;
}
if ( tb->changed ) {
__textbox_update_pango_text ( tb );
}
int height = textbox_get_height ( tb );
return height;
}
static gboolean textbox_editable_trigger_action ( widget *wid, MouseBindingMouseDefaultAction action, gint x, gint y, G_GNUC_UNUSED void *user_data )
{
textbox *tb = (textbox *) wid;
switch ( action )
{
case MOUSE_CLICK_DOWN:
{
gint i;
pango_layout_xy_to_index ( tb->layout, x * PANGO_SCALE, y * PANGO_SCALE, &i, NULL );
textbox_cursor ( tb, i );
return TRUE;
}
case MOUSE_CLICK_UP:
case MOUSE_DCLICK_DOWN:
case MOUSE_DCLICK_UP:
break;
}
return FALSE;
}
textbox* textbox_create_full ( WidgetType type, const char *name, TextboxFlags flags, TextBoxFontType tbft, const char *text )
{
textbox *tb = g_slice_new0 ( textbox );
widget_init ( WIDGET ( tb ), type, name );
tb->widget.draw = textbox_draw;
tb->widget.free = textbox_free;
tb->widget.resize = textbox_resize;
tb->widget.get_width = textbox_get_width;
tb->widget.get_height = _textbox_get_height;
tb->widget.get_desired_height = textbox_get_desired_height;
tb->flags = flags;
tb->changed = FALSE;
tb->layout = pango_layout_new ( p_context );
textbox_font ( tb, tbft );
tb->metrics = p_metrics;
const char * font = rofi_theme_get_string ( WIDGET ( tb ), "font", NULL );
if ( font ) {
TBFontConfig *tbfc = g_hash_table_lookup ( tbfc_cache, font );
if ( tbfc == NULL ) {
tbfc = g_malloc0 ( sizeof ( TBFontConfig ) );
tbfc->pfd = pango_font_description_from_string ( font );
if ( helper_validate_font ( tbfc->pfd, font ) ) {
tbfc->metrics = pango_context_get_metrics ( p_context, tbfc->pfd, NULL );
// Cast away consts. (*yuck*) because table_insert does not know it is const.
g_hash_table_insert ( tbfc_cache, (char *) font, tbfc );
}
else {
pango_font_description_free ( tbfc->pfd );
g_free ( tbfc );
tbfc = NULL;
}
}
if ( tbfc ) {
// Update for used font.
pango_layout_set_font_description ( tb->layout, tbfc->pfd );
tb->metrics = tbfc->metrics;
}
}
if ( ( flags & TB_WRAP ) == TB_WRAP ) {
pango_layout_set_wrap ( tb->layout, PANGO_WRAP_WORD_CHAR );
}
textbox_text ( tb, text ? text : "" );
textbox_cursor_end ( tb );
// auto height/width modes get handled here
textbox_moveresize ( tb, tb->widget.x, tb->widget.y, tb->widget.w, tb->widget.h );
tb->blink_timeout = 0;
tb->blink = 1;
if ( ( flags & TB_EDITABLE ) == TB_EDITABLE ) {
tb->blink_timeout = g_timeout_add ( 1200, textbox_blink, tb );
tb->widget.trigger_action = textbox_editable_trigger_action;
}
// Enabled by default
tb->widget.enabled = rofi_theme_get_boolean ( WIDGET ( tb ), "enabled", TRUE );
return tb;
}
/**
* State names used for theming.
*/
const char *const theme_prop_names[][3] = {
/** Normal row */
{ "normal.normal", "selected.normal", "alternate.normal" },
/** Urgent row */
{ "normal.urgent", "selected.urgent", "alternate.urgent" },
/** Active row */
{ "normal.active", "selected.active", "alternate.active" },
};
void textbox_font ( textbox *tb, TextBoxFontType tbft )
{
TextBoxFontType t = tbft & STATE_MASK;
if ( tb == NULL ) {
return;
}
// ACTIVE has priority over URGENT if both set.
if ( t == ( URGENT | ACTIVE ) ) {
t = ACTIVE;
}
switch ( ( tbft & FMOD_MASK ) )
{
case HIGHLIGHT:
widget_set_state ( WIDGET ( tb ), theme_prop_names[t][1] );
break;
case ALT:
widget_set_state ( WIDGET ( tb ), theme_prop_names[t][2] );
break;
default:
widget_set_state ( WIDGET ( tb ), theme_prop_names[t][0] );
break;
}
if ( tb->tbft != tbft || tb->widget.state == NULL ) {
widget_queue_redraw ( WIDGET ( tb ) );
}
tb->tbft = tbft;
}
/**
* @param tb The textbox object.
*
* Update the pango layout's text. It does this depending on the
* textbox flags.
*/
static void __textbox_update_pango_text ( textbox *tb )
{
pango_layout_set_attributes ( tb->layout, NULL );
if ( ( tb->flags & TB_PASSWORD ) == TB_PASSWORD ) {
size_t l = g_utf8_strlen ( tb->text, -1 );
char string [l + 1];
memset ( string, '*', l );
string[l] = '\0';
pango_layout_set_text ( tb->layout, string, l );
}
else if ( tb->flags & TB_MARKUP || tb->tbft & MARKUP ) {
pango_layout_set_markup ( tb->layout, tb->text, -1 );
}
else {
pango_layout_set_text ( tb->layout, tb->text, -1 );
}
}
const char *textbox_get_visible_text ( const textbox *tb )
{
return pango_layout_get_text ( tb->layout );
}
PangoAttrList *textbox_get_pango_attributes ( textbox *tb )
{
return pango_layout_get_attributes ( tb->layout );
}
void textbox_set_pango_attributes ( textbox *tb, PangoAttrList *list )
{
pango_layout_set_attributes ( tb->layout, list );
}
// 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." );
}
}
__textbox_update_pango_text ( tb );
if ( tb->flags & TB_AUTOWIDTH ) {
textbox_moveresize ( tb, tb->widget.x, tb->widget.y, tb->widget.w, tb->widget.h );
if ( WIDGET ( tb )->parent ) {
widget_update ( WIDGET ( tb )->parent );
}
}
tb->cursor = MAX ( 0, MIN ( ( int ) g_utf8_strlen ( tb->text, -1 ), tb->cursor ) );
widget_queue_redraw ( WIDGET ( tb ) );
}
// within the parent handled auto width/height modes
void textbox_moveresize ( textbox *tb, int x, int y, int w, int h )
{
unsigned int offset = ( tb->flags & TB_INDICATOR ) ? DOT_OFFSET : 0;
if ( tb->flags & TB_AUTOWIDTH ) {
pango_layout_set_width ( tb->layout, -1 );
unsigned int offset = ( tb->flags & TB_INDICATOR ) ? DOT_OFFSET : 0;
w = textbox_get_font_width ( tb ) + widget_padding_get_padding_width ( WIDGET ( tb ) ) + offset;
}
else {
// set ellipsize
if ( ( tb->flags & TB_EDITABLE ) == TB_EDITABLE ) {
pango_layout_set_ellipsize ( tb->layout, PANGO_ELLIPSIZE_MIDDLE );
}
else if ( ( tb->flags & TB_WRAP ) != TB_WRAP ) {
pango_layout_set_ellipsize ( tb->layout, PANGO_ELLIPSIZE_END );
}
}
if ( tb->flags & TB_AUTOHEIGHT ) {
// Width determines height!
int tw = MAX ( 1, w );
pango_layout_set_width ( tb->layout, PANGO_SCALE * ( tw - widget_padding_get_padding_width ( WIDGET ( tb ) ) - offset ) );
int hd = textbox_get_height ( tb );
h = MAX ( hd, h );
}
if ( x != tb->widget.x || y != tb->widget.y || w != tb->widget.w || h != tb->widget.h ) {
tb->widget.x = x;
tb->widget.y = y;
tb->widget.h = MAX ( 1, h );
tb->widget.w = MAX ( 1, w );
}
// We always want to update this
pango_layout_set_width ( tb->layout, PANGO_SCALE * ( tb->widget.w - widget_padding_get_padding_width ( WIDGET ( tb ) ) - offset ) );
widget_queue_redraw ( WIDGET ( tb ) );
}
// will also unmap the window if still displayed
static void textbox_free ( widget *wid )
{
textbox *tb = (textbox *) wid;
if ( tb->blink_timeout > 0 ) {
g_source_remove ( tb->blink_timeout );
tb->blink_timeout = 0;
}
g_free ( tb->text );
if ( tb->layout != NULL ) {
g_object_unref ( tb->layout );
}
g_slice_free ( textbox, tb );
}
static void textbox_draw ( widget *wid, cairo_t *draw )
{
textbox *tb = (textbox *) wid;
unsigned int offset = ( tb->flags & TB_INDICATOR ) ? DOT_OFFSET : 0;
if ( tb->changed ) {
__textbox_update_pango_text ( tb );
}
// Skip the side MARGIN on the X axis.
int x = widget_padding_get_left ( WIDGET ( tb ) ) + offset;
if ( tb->flags & TB_RIGHT ) {
int line_width = 0;
// Get actual width.
pango_layout_get_pixel_size ( tb->layout, &line_width, NULL );
x = ( tb->widget.w - line_width - widget_padding_get_right ( WIDGET ( tb ) ) - offset );
}
else if ( tb->flags & TB_CENTER ) {
int tw = textbox_get_font_width ( tb );
x = ( ( tb->widget.w - tw - widget_padding_get_padding_width ( WIDGET ( tb ) ) - offset ) ) / 2;
}
int top = widget_padding_get_top ( WIDGET ( tb ) );
rofi_theme_get_color ( WIDGET ( tb ), "foreground", draw );
// Text
rofi_theme_get_color ( WIDGET ( tb ), "text", draw );
// draw the cursor
if ( tb->flags & TB_EDITABLE && tb->blink ) {
int y = top + ( pango_font_metrics_get_ascent ( tb->metrics ) - pango_layout_get_baseline ( tb->layout ) ) / PANGO_SCALE;
// We want to place the cursor based on the text shown.
const char *text = pango_layout_get_text ( tb->layout );
// Clamp the position, should not be needed, but we are paranoid.
int cursor_offset = MIN ( tb->cursor, g_utf8_strlen ( text, -1 ) );
PangoRectangle pos;
// convert to byte location.
char *offset = g_utf8_offset_to_pointer ( text, cursor_offset );
pango_layout_get_cursor_pos ( tb->layout, offset - text, &pos, NULL );
int cursor_x = pos.x / PANGO_SCALE;
int cursor_y = pos.y / PANGO_SCALE;
int cursor_height = pos.height / PANGO_SCALE;
int cursor_width = 2;
cairo_rectangle ( draw, x + cursor_x, y + cursor_y, cursor_width, cursor_height );
cairo_fill ( draw );
}
// Set ARGB
// We need to set over, otherwise subpixel hinting wont work.
cairo_set_operator ( draw, CAIRO_OPERATOR_OVER );
cairo_move_to ( draw, x, top );
pango_cairo_show_layout ( draw, tb->layout );
if ( ( tb->flags & TB_INDICATOR ) == TB_INDICATOR && ( tb->tbft & ( SELECTED ) ) ) {
cairo_arc ( draw, DOT_OFFSET / 2.0, tb->widget.h / 2.0, 2.0, 0, 2.0 * G_PI );
cairo_fill ( draw );
}
}
// cursor handling for edit mode
void textbox_cursor ( textbox *tb, int pos )
{
int length = ( tb->text == NULL ) ? 0 : g_utf8_strlen ( tb->text, -1 );
tb->cursor = MAX ( 0, MIN ( length, pos ) );
// Stop blink!
tb->blink = 3;
widget_queue_redraw ( WIDGET ( tb ) );
}
/**
* @param tb Handle to the textbox
*
* Move cursor one position forward.
*
* @returns if cursor was moved.
*/
static int textbox_cursor_inc ( textbox *tb )
{
int old = tb->cursor;
textbox_cursor ( tb, tb->cursor + 1 );
return old != tb->cursor;
}
/**
* @param tb Handle to the textbox
*
* Move cursor one position backward.
*
* @returns if cursor was moved.
*/
static int textbox_cursor_dec ( textbox *tb )
{
int old = tb->cursor;
textbox_cursor ( tb, tb->cursor - 1 );
return old != tb->cursor;
}
// Move word right
static void textbox_cursor_inc_word ( textbox *tb )
{
if ( tb->text == NULL ) {
return;
}
// Find word boundaries, with pango_Break?
gchar *c = g_utf8_offset_to_pointer ( 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 || *c == '\0' ) {
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 = g_utf8_pointer_to_offset ( tb->text, c );
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 = g_utf8_offset_to_pointer ( 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 = g_utf8_pointer_to_offset ( tb->text, c );
textbox_cursor ( tb, index );
}
// end of line
static void textbox_cursor_end ( textbox *tb )
{
if ( tb->text == NULL ) {
tb->cursor = 0;
widget_queue_redraw ( WIDGET ( tb ) );
return;
}
tb->cursor = ( int ) g_utf8_strlen ( tb->text, -1 );
widget_queue_redraw ( WIDGET ( tb ) );
// Stop blink!
tb->blink = 2;
}
// insert text
void textbox_insert ( textbox *tb, const int char_pos, const char *str, const int slen )
{
char *c = g_utf8_offset_to_pointer ( tb->text, char_pos );
int pos = c - tb->text;
int len = ( int ) strlen ( tb->text );
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 );
// Set modified, lay out need te be redrawn
// Stop blink!
tb->blink = 2;
tb->changed = TRUE;
}
// remove text
void textbox_delete ( textbox *tb, int pos, int dlen )
{
int len = g_utf8_strlen ( tb->text, -1 );
if ( len == pos ) {
return;
}
pos = MAX ( 0, MIN ( len, pos ) );
if ( ( pos + dlen ) > len ) {
dlen = len - dlen;
}
// move everything after pos+dlen down
char *start = g_utf8_offset_to_pointer ( tb->text, pos );
char *end = g_utf8_offset_to_pointer ( tb->text, pos + dlen );
// Move remainder + closing \0
memmove ( start, end, ( tb->text + strlen ( tb->text ) ) - end + 1 );
if ( tb->cursor >= pos && tb->cursor < ( pos + dlen ) ) {
tb->cursor = pos;
}
else if ( tb->cursor >= ( pos + dlen ) ) {
tb->cursor -= dlen;
}
// Set modified, lay out need te be redrawn
// Stop blink!
tb->blink = 2;
tb->changed = TRUE;
}
/**
* @param tb Handle to the textbox
*
* Delete character after cursor.
*/
static void textbox_cursor_del ( textbox *tb )
{
if ( tb->text == NULL ) {
return;
}
textbox_delete ( tb, tb->cursor, 1 );
}
/**
* @param tb Handle to the textbox
*
* Delete character before cursor.
*/
static 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_eol ( textbox *tb )
{
if ( tb->cursor >= 0 ) {
int length = g_utf8_strlen ( tb->text, -1 ) - tb->cursor;
if ( length >= 0 ) {
textbox_delete ( tb, tb->cursor, length );
}
}
}
static void textbox_cursor_del_sol ( textbox *tb )
{
if ( tb->cursor >= 0 ) {
int length = tb->cursor;
if ( length >= 0 ) {
textbox_delete ( tb, 0, length );
}
}
}
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
// 2 = nav
// 0 = unhandled
// 1 = handled
// -1 = handled and return pressed (finished)
int textbox_keybinding ( textbox *tb, KeyBindingAction action )
{
if ( !( tb->flags & TB_EDITABLE ) ) {
return 0;
}
switch ( action )
{
// Left or Ctrl-b
case MOVE_CHAR_BACK:
return ( textbox_cursor_dec ( tb ) == TRUE ) ? 2 : 0;
// Right or Ctrl-F
case MOVE_CHAR_FORWARD:
return ( textbox_cursor_inc ( tb ) == TRUE ) ? 2 : 0;
// Ctrl-U: Kill from the beginning to the end of the line.
case CLEAR_LINE:
textbox_text ( tb, "" );
return 1;
// Ctrl-A
case MOVE_FRONT:
textbox_cursor ( tb, 0 );
return 2;
// Ctrl-E
case MOVE_END:
textbox_cursor_end ( tb );
return 2;
// Ctrl-Alt-h
case REMOVE_WORD_BACK:
textbox_cursor_bkspc_word ( tb );
return 1;
// Ctrl-Alt-d
case REMOVE_WORD_FORWARD:
textbox_cursor_del_word ( tb );
return 1;
case REMOVE_TO_EOL:
textbox_cursor_del_eol ( tb );
return 1;
case REMOVE_TO_SOL:
textbox_cursor_del_sol ( tb );
return 1;
// Delete or Ctrl-D
case REMOVE_CHAR_FORWARD:
textbox_cursor_del ( tb );
return 1;
// Alt-B
case MOVE_WORD_BACK:
textbox_cursor_dec_word ( tb );
return 2;
// Alt-F
case MOVE_WORD_FORWARD:
textbox_cursor_inc_word ( tb );
return 2;
// BackSpace, Ctrl-h
case REMOVE_CHAR_BACK:
textbox_cursor_bkspc ( tb );
return 1;
default:
g_return_val_if_reached ( 0 );
}
}
gboolean textbox_append_char ( textbox *tb, const char *pad, const int pad_len )
{
if ( !( tb->flags & TB_EDITABLE ) ) {
return FALSE;
}
// Filter When alt/ctrl is pressed do not accept the character.
if ( !g_unichar_iscntrl ( g_utf8_get_char ( pad ) ) ) {
textbox_insert ( tb, tb->cursor, pad, pad_len );
textbox_cursor ( tb, tb->cursor + 1 );
return TRUE;
}
return FALSE;
}
static void tbfc_entry_free ( TBFontConfig *tbfc )
{
pango_font_metrics_unref ( tbfc->metrics );
if ( tbfc->pfd ) {
pango_font_description_free ( tbfc->pfd );
}
g_free ( tbfc );
}
void textbox_setup ( void )
{
tbfc_cache = g_hash_table_new_full ( g_str_hash, g_str_equal, NULL, (GDestroyNotify) tbfc_entry_free );
}
/** Name of the default font (if none is given) */
const char *default_font_name = "default";
void textbox_set_pango_context ( const char *font, PangoContext *p )
{
g_assert ( p_metrics == NULL );
p_context = g_object_ref ( p );
p_metrics = pango_context_get_metrics ( p_context, NULL, NULL );
TBFontConfig *tbfc = g_malloc0 ( sizeof ( TBFontConfig ) );
tbfc->metrics = p_metrics;
g_hash_table_insert ( tbfc_cache, (gpointer *) ( font ? font : default_font_name ), tbfc );
}
void textbox_cleanup ( void )
{
g_hash_table_destroy ( tbfc_cache );
if ( p_context ) {
g_object_unref ( p_context );
p_context = NULL;
}
}
int textbox_get_width ( widget *wid )
{
textbox *tb = (textbox *) wid;
if ( tb->flags & TB_AUTOWIDTH ) {
unsigned int offset = ( tb->flags & TB_INDICATOR ) ? DOT_OFFSET : 0;
return textbox_get_font_width ( tb ) + widget_padding_get_padding_width ( wid ) + offset;
}
return tb->widget.w;
}
int _textbox_get_height ( widget *wid )
{
textbox *tb = (textbox *) wid;
if ( tb->flags & TB_AUTOHEIGHT ) {
return textbox_get_height ( tb );
}
return tb->widget.h;
}
int textbox_get_height ( const textbox *tb )
{
return textbox_get_font_height ( tb ) + widget_padding_get_padding_height ( WIDGET ( tb ) );
}
int textbox_get_font_height ( const textbox *tb )
{
int height;
pango_layout_get_pixel_size ( tb->layout, NULL, &height );
return height;
}
int textbox_get_font_width ( const textbox *tb )
{
int width;
pango_layout_get_pixel_size ( tb->layout, &width, NULL );
return width;
}
/** Caching for the expected character height. */
static double char_height = -1;
double textbox_get_estimated_char_height ( void )
{
if ( char_height < 0 ) {
int height = pango_font_metrics_get_ascent ( p_metrics ) + pango_font_metrics_get_descent ( p_metrics );
char_height = ( height ) / (double) PANGO_SCALE;
}
return char_height;
}
/** Caching for the expected character width. */
static double char_width = -1;
double textbox_get_estimated_char_width ( void )
{
if ( char_width < 0 ) {
int width = pango_font_metrics_get_approximate_char_width ( p_metrics );
char_width = ( width ) / (double) PANGO_SCALE;
}
return char_width;
}
int textbox_get_estimated_height ( const textbox *tb, int eh )
{
int height = pango_font_metrics_get_ascent ( tb->metrics ) + pango_font_metrics_get_descent ( tb->metrics );
return ( eh * height ) / PANGO_SCALE + widget_padding_get_padding_height ( WIDGET ( tb ) );
}
int textbox_get_desired_width ( widget *wid )
{
textbox *tb = (textbox *) wid;
unsigned int offset = ( tb->flags & TB_INDICATOR ) ? DOT_OFFSET : 0;
if ( tb->flags & TB_AUTOWIDTH ) {
return textbox_get_font_width ( tb ) + widget_padding_get_padding_width ( wid ) + offset;
}
int width = 0;
pango_layout_set_width ( tb->layout, -1 );
width = textbox_get_font_width ( tb );
// Restore.
pango_layout_set_width ( tb->layout, PANGO_SCALE * ( tb->widget.w - widget_padding_get_padding_width ( WIDGET ( tb ) ) - offset ) );
return width + widget_padding_get_padding_width ( wid ) + offset;
}
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