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Make textbox use character position instead of byte index for cursor.

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This commit is contained in:
Dave Davenport 2016-08-15 08:58:48 +02:00
parent acdd8ddb5a
commit 26d1e64b22
3 changed files with 38 additions and 34 deletions
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60
source/textbox.c
View file

@ -201,7 +201,7 @@ void textbox_text ( textbox *tb, const char *text )
textbox_moveresize ( tb, tb->widget.x, tb->widget.y, tb->widget.w, tb->widget.h ); textbox_moveresize ( tb, tb->widget.x, tb->widget.y, tb->widget.w, tb->widget.h );
} }
tb->cursor = MAX ( 0, MIN ( ( int ) strlen ( text ), tb->cursor ) ); tb->cursor = MAX ( 0, MIN ( ( int ) g_utf8_strlen ( tb->text, -1 ), tb->cursor ) );
} }
// within the parent handled auto width/height modes // within the parent handled auto width/height modes
@ -284,8 +284,6 @@ static void texbox_update ( textbox *tb )
cairo_set_operator ( tb->main_draw, CAIRO_OPERATOR_SOURCE ); cairo_set_operator ( tb->main_draw, CAIRO_OPERATOR_SOURCE );
pango_cairo_update_layout ( tb->main_draw, tb->layout ); pango_cairo_update_layout ( tb->main_draw, tb->layout );
char *text = tb->text ? tb->text : "";
int text_len = strlen ( text );
int font_height = textbox_get_font_height ( tb ); int font_height = textbox_get_font_height ( tb );
int cursor_x = 0; int cursor_x = 0;
@ -296,14 +294,14 @@ static void texbox_update ( textbox *tb )
} }
if ( tb->flags & TB_EDITABLE ) { if ( tb->flags & TB_EDITABLE ) {
// 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; PangoRectangle pos;
int cursor_offset = 0; // convert to byte location.
cursor_offset = MIN ( tb->cursor, text_len ); char *offset = g_utf8_offset_to_pointer ( text, cursor_offset );
if ( (tb->flags&TB_PASSWORD) == TB_PASSWORD ){ pango_layout_get_cursor_pos ( tb->layout, offset - text, &pos, NULL );
cursor_offset = g_utf8_pointer_to_offset ( tb->text, tb->text+cursor_offset );
}
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; cursor_x = pos.x / PANGO_SCALE;
} }
@ -374,7 +372,7 @@ void textbox_draw ( textbox *tb, cairo_t *draw )
// cursor handling for edit mode // cursor handling for edit mode
void textbox_cursor ( textbox *tb, int pos ) void textbox_cursor ( textbox *tb, int pos )
{ {
int length = ( tb->text == NULL ) ? 0 : strlen ( tb->text ); int length = ( tb->text == NULL ) ? 0 : g_utf8_strlen ( tb->text, -1 );
tb->cursor = MAX ( 0, MIN ( length, pos ) ); tb->cursor = MAX ( 0, MIN ( length, pos ) );
tb->update = TRUE; tb->update = TRUE;
} }
@ -382,15 +380,13 @@ void textbox_cursor ( textbox *tb, int pos )
// move right // move right
void textbox_cursor_inc ( textbox *tb ) void textbox_cursor_inc ( textbox *tb )
{ {
int index = g_utf8_next_char ( &( tb->text[tb->cursor] ) ) - tb->text; textbox_cursor ( tb, tb->cursor + 1 );
textbox_cursor ( tb, index );
} }
// move left // move left
void textbox_cursor_dec ( textbox *tb ) void textbox_cursor_dec ( textbox *tb )
{ {
int index = g_utf8_prev_char ( &( tb->text[tb->cursor] ) ) - tb->text; textbox_cursor ( tb, tb->cursor - 1 );
textbox_cursor ( tb, index );
} }
// Move word right // Move word right
@ -400,7 +396,7 @@ static void textbox_cursor_inc_word ( textbox *tb )
return; return;
} }
// Find word boundaries, with pango_Break? // Find word boundaries, with pango_Break?
gchar *c = &( tb->text[tb->cursor] ); gchar *c = g_utf8_offset_to_pointer ( tb->text, tb->cursor );
while ( ( c = g_utf8_next_char ( c ) ) ) { while ( ( c = g_utf8_next_char ( c ) ) ) {
gunichar uc = g_utf8_get_char ( c ); gunichar uc = g_utf8_get_char ( c );
GUnicodeBreakType bt = g_unichar_break_type ( uc ); GUnicodeBreakType bt = g_unichar_break_type ( uc );
@ -420,7 +416,7 @@ static void textbox_cursor_inc_word ( textbox *tb )
break; break;
} }
} }
int index = c - tb->text; int index = g_utf8_pointer_to_offset ( tb->text, c );
textbox_cursor ( tb, index ); textbox_cursor ( tb, index );
} }
// move word left // move word left
@ -428,7 +424,7 @@ static void textbox_cursor_dec_word ( textbox *tb )
{ {
// Find word boundaries, with pango_Break? // Find word boundaries, with pango_Break?
gchar *n; gchar *n;
gchar *c = &( tb->text[tb->cursor] ); gchar *c = g_utf8_offset_to_pointer ( tb->text, tb->cursor );
while ( ( c = g_utf8_prev_char ( c ) ) && c != tb->text ) { while ( ( c = g_utf8_prev_char ( c ) ) && c != tb->text ) {
gunichar uc = g_utf8_get_char ( c ); gunichar uc = g_utf8_get_char ( c );
GUnicodeBreakType bt = g_unichar_break_type ( uc ); GUnicodeBreakType bt = g_unichar_break_type ( uc );
@ -451,7 +447,7 @@ static void textbox_cursor_dec_word ( textbox *tb )
} }
} }
} }
int index = c - tb->text; int index = g_utf8_pointer_to_offset ( tb->text, c );
textbox_cursor ( tb, index ); textbox_cursor ( tb, index );
} }
@ -463,13 +459,15 @@ void textbox_cursor_end ( textbox *tb )
tb->update = TRUE; tb->update = TRUE;
return; return;
} }
tb->cursor = ( int ) strlen ( tb->text ); tb->cursor = ( int ) g_utf8_strlen ( tb->text, -1 );
tb->update = TRUE; tb->update = TRUE;
} }
// insert text // insert text
void textbox_insert ( textbox *tb, int pos, char *str, int slen ) void textbox_insert ( textbox *tb, int char_pos, char *str, int slen )
{ {
char *c = g_utf8_offset_to_pointer ( tb->text, char_pos );
int pos = c - tb->text;
int len = ( int ) strlen ( tb->text ); int len = ( int ) strlen ( tb->text );
pos = MAX ( 0, MIN ( len, pos ) ); pos = MAX ( 0, MIN ( len, pos ) );
// expand buffer // expand buffer
@ -488,12 +486,19 @@ void textbox_insert ( textbox *tb, int pos, char *str, int slen )
// remove text // remove text
void textbox_delete ( textbox *tb, int pos, int dlen ) void textbox_delete ( textbox *tb, int pos, int dlen )
{ {
int len = strlen ( tb->text ); int len = g_utf8_strlen ( tb->text, -1 );
if ( len == pos ) {
return;
}
pos = MAX ( 0, MIN ( len, pos ) ); pos = MAX ( 0, MIN ( len, pos ) );
if ( ( pos + dlen ) > len ) {
dlen = len - dlen;
}
// move everything after pos+dlen down // move everything after pos+dlen down
char *at = tb->text + pos; 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 // Move remainder + closing \0
memmove ( at, at + dlen, len - pos - dlen + 1 ); memmove ( start, end, ( tb->text + strlen ( tb->text ) ) - end + 1 );
if ( tb->cursor >= pos && tb->cursor < ( pos + dlen ) ) { if ( tb->cursor >= pos && tb->cursor < ( pos + dlen ) ) {
tb->cursor = pos; tb->cursor = pos;
} }
@ -511,8 +516,7 @@ void textbox_cursor_del ( textbox *tb )
if ( tb->text == NULL ) { if ( tb->text == NULL ) {
return; return;
} }
int index = g_utf8_next_char ( &( tb->text[tb->cursor] ) ) - tb->text; textbox_delete ( tb, tb->cursor, 1 );
textbox_delete ( tb, tb->cursor, index - tb->cursor );
} }
// back up and delete one character // back up and delete one character
@ -536,7 +540,7 @@ static void textbox_cursor_bkspc_word ( textbox *tb )
static void textbox_cursor_del_eol ( textbox *tb ) static void textbox_cursor_del_eol ( textbox *tb )
{ {
if ( tb->cursor >= 0 ) { if ( tb->cursor >= 0 ) {
int length = strlen ( tb->text ) - tb->cursor; int length = g_utf8_strlen ( tb->text, -1 ) - tb->cursor;
if ( length >= 0 ) { if ( length >= 0 ) {
textbox_delete ( tb, tb->cursor, length ); textbox_delete ( tb, tb->cursor, length );
} }
@ -640,7 +644,7 @@ gboolean textbox_append_char ( textbox *tb, char *pad, int pad_len )
if ( !g_unichar_iscntrl ( g_utf8_get_char ( pad ) ) ) { if ( !g_unichar_iscntrl ( g_utf8_get_char ( pad ) ) ) {
tb->blink = 2; tb->blink = 2;
textbox_insert ( tb, tb->cursor, pad, pad_len ); textbox_insert ( tb, tb->cursor, pad, pad_len );
textbox_cursor ( tb, tb->cursor + pad_len ); textbox_cursor ( tb, tb->cursor + 1 );
return TRUE; return TRUE;
} }
return FALSE; return FALSE;

2
source/view.c
View file

@ -1152,7 +1152,7 @@ static void rofi_view_paste ( RofiViewState *state, xcb_selection_notify_event_t
} }
// Insert string move cursor. // Insert string move cursor.
textbox_insert ( state->text, state->text->cursor, text, dl ); textbox_insert ( state->text, state->text->cursor, text, dl );
textbox_cursor ( state->text, state->text->cursor + dl ); textbox_cursor ( state->text, state->text->cursor + g_utf8_strlen(text, -1) );
// Force a redraw and refiltering of the text. // Force a redraw and refiltering of the text.
state->update = TRUE; state->update = TRUE;
state->refilter = TRUE; state->refilter = TRUE;