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rofi/source/widgets/textbox.c
Dave Davenport b891ffa2b3 [Textbox] Try to fix pango alignment
2022-05-30 19:21:31 +02:00

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/*
* rofi
*
* MIT/X11 License
* Copyright © 2012 Sean Pringle <sean.pringle@gmail.com>
* Copyright © 2013-2022 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 "widgets/textbox.h"
#include "helper-theme.h"
#include "helper.h"
#include "keyb.h"
#include "mode.h"
#include "view.h"
#include <ctype.h>
#include <glib.h>
#include <math.h>
#include <string.h>
#include <xcb/xcb.h>
#include "theme.h"
/** The space reserved for the DOT when enabling multi-select. */
#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);
/** Default pango context */
static PangoContext *p_context = NULL;
/** The pango font metrics */
static PangoFontMetrics *p_metrics = NULL;
/** Default tbfc */
static TBFontConfig *tbfc_default = NULL;
/** 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, const int width) {
textbox *tb = (textbox *)wid;
unsigned int offset = ((tb->flags & TB_INDICATOR) ? DOT_OFFSET : 0);
if ((tb->flags & TB_AUTOHEIGHT) == 0) {
return tb->widget.h;
}
if (tb->changed) {
__textbox_update_pango_text(tb);
}
int old_width = pango_layout_get_width(tb->layout);
pango_layout_set_width(
tb->layout,
PANGO_SCALE *
(width - widget_padding_get_padding_width(WIDGET(tb)) - offset));
int height =
textbox_get_estimated_height(tb, pango_layout_get_line_count(tb->layout));
pango_layout_set_width(tb->layout, old_width);
return height;
}
static WidgetTriggerActionResult
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;
// subtract padding on left.
x -= widget_padding_get_left(wid);
gint max = textbox_get_font_width(tb);
// Right of text, move to end.
if (x >= max) {
textbox_cursor_end(tb);
} else if (x > 0) {
// If in range, get index.
pango_layout_xy_to_index(tb->layout, x * PANGO_SCALE, y * PANGO_SCALE, &i,
NULL);
textbox_cursor(tb, i);
}
return WIDGET_TRIGGER_ACTION_RESULT_HANDLED;
}
case MOUSE_CLICK_UP:
case MOUSE_DCLICK_DOWN:
case MOUSE_DCLICK_UP:
break;
}
return WIDGET_TRIGGER_ACTION_RESULT_IGNORED;
}
static void textbox_initialize_font(textbox *tb) {
tb->tbfc = tbfc_default;
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);
PangoLayout *layout = pango_layout_new(p_context);
pango_layout_set_font_description(layout, tbfc->pfd);
pango_layout_set_text(layout, "aAjb", -1);
PangoRectangle rect;
pango_layout_get_pixel_extents(layout, NULL, &rect);
tbfc->height = rect.y + rect.height;
g_object_unref(layout);
// 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->tbfc = tbfc;
}
}
}
static void textbox_tab_stops(textbox *tb) {
GList *dists = rofi_theme_get_list_distance(WIDGET(tb), "tab-stops");
if (dists != NULL) {
PangoTabArray *tabs = pango_tab_array_new(g_list_length(dists), TRUE);
int i = 0, ppx = 0;
for (const GList *iter = g_list_first(dists); iter != NULL;
iter = g_list_next(iter), i++) {
const RofiDistance *dist = iter->data;
int px = distance_get_pixel(*dist, ROFI_ORIENTATION_HORIZONTAL);
if (px <= ppx) {
continue;
}
pango_tab_array_set_tab(tabs, i, PANGO_TAB_LEFT, px);
ppx = px;
}
pango_layout_set_tabs(tb->layout, tabs);
pango_tab_array_free(tabs);
g_list_free_full(dists, g_free);
}
}
textbox *textbox_create(widget *parent, WidgetType type, const char *name,
TextboxFlags flags, TextBoxFontType tbft,
const char *text, double xalign, double yalign) {
textbox *tb = g_slice_new0(textbox);
widget_init(WIDGET(tb), parent, 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->widget.get_desired_width = textbox_get_desired_width;
tb->flags = flags;
tb->emode = PANGO_ELLIPSIZE_END;
tb->changed = FALSE;
tb->layout = pango_layout_new(p_context);
textbox_font(tb, tbft);
textbox_initialize_font(tb);
textbox_tab_stops(tb);
if ((tb->flags & TB_WRAP) == TB_WRAP) {
pango_layout_set_wrap(tb->layout, PANGO_WRAP_WORD_CHAR);
}
// Allow overriding of markup.
if (rofi_theme_get_boolean(WIDGET(tb), "markup",
(tb->flags & TB_MARKUP) == TB_MARKUP)) {
tb->flags |= TB_MARKUP;
} else {
tb->flags &= (~TB_MARKUP);
}
const char *txt = rofi_theme_get_string(WIDGET(tb), "str", text);
if (txt == NULL || (*txt) == '\0') {
txt = rofi_theme_get_string(WIDGET(tb), "content", text);
}
const char *placeholder =
rofi_theme_get_string(WIDGET(tb), "placeholder", NULL);
if (placeholder) {
tb->placeholder = placeholder;
}
textbox_text(tb, txt ? txt : "");
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 ((tb->flags & TB_EDITABLE) == TB_EDITABLE) {
if (rofi_theme_get_boolean(WIDGET(tb), "blink", TRUE)) {
tb->blink_timeout = g_timeout_add(1200, textbox_blink, tb);
}
tb->widget.trigger_action = textbox_editable_trigger_action;
}
tb->yalign = rofi_theme_get_double(WIDGET(tb), "vertical-align", yalign);
tb->yalign = MAX(0, MIN(1.0, tb->yalign));
tb->xalign = rofi_theme_get_double(WIDGET(tb), "horizontal-align", xalign);
tb->xalign = MAX(0, MIN(1.0, tb->xalign));
if (tb->xalign < 0.2) {
pango_layout_set_alignment(tb->layout, PANGO_ALIGN_LEFT);
} else if (tb->xalign < 0.8) {
pango_layout_set_alignment(tb->layout, PANGO_ALIGN_CENTER);
} else {
pango_layout_set_alignment(tb->layout, PANGO_ALIGN_RIGHT);
}
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->placeholder && (tb->text == NULL || tb->text[0] == 0)) {
tb->show_placeholder = TRUE;
pango_layout_set_text(tb->layout, tb->placeholder, -1);
return;
}
tb->show_placeholder = FALSE;
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) {
if (tb == NULL) {
return NULL;
}
return pango_layout_get_text(tb->layout);
}
PangoAttrList *textbox_get_pango_attributes(textbox *tb) {
if (tb == NULL) {
return NULL;
}
return pango_layout_get_attributes(tb->layout);
}
void textbox_set_pango_attributes(textbox *tb, PangoAttrList *list) {
if (tb == NULL) {
return;
}
pango_layout_set_attributes(tb->layout, list);
}
// set the default text to display
void textbox_text(textbox *tb, const char *text) {
if (tb == NULL) {
return;
}
g_free(tb->text);
const gchar *last_pointer = NULL;
if (text == NULL) {
tb->text = g_strdup("Invalid string.");
} else {
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);
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, tb->emode);
} else {
pango_layout_set_ellipsize(tb->layout, PANGO_ELLIPSIZE_NONE);
}
}
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) {
if (wid == NULL) {
return;
}
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) {
if (wid == NULL) {
return;
}
textbox *tb = (textbox *)wid;
unsigned int dot_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));
int top = widget_padding_get_top(WIDGET(tb));
int y = (pango_font_metrics_get_ascent(tb->tbfc->metrics) -
pango_layout_get_baseline(tb->layout)) /
PANGO_SCALE;
int line_width = 0, line_height = 0;
// Get actual width.
pango_layout_get_pixel_size(tb->layout, &line_width, &line_height);
if (tb->yalign > 0.001) {
int bottom = widget_padding_get_bottom(WIDGET(tb));
top = (tb->widget.h - bottom - line_height - top) * tb->yalign + top;
}
y += top;
x += dot_offset;
if (tb->xalign > 0.001) {
}
// TODO check if this is still needed after flatning.
cairo_set_operator(draw, CAIRO_OPERATOR_OVER);
cairo_set_source_rgb(draw, 0.0, 0.0, 0.0);
rofi_theme_get_color(WIDGET(tb), "text-color", draw);
if (tb->show_placeholder) {
rofi_theme_get_color(WIDGET(tb), "placeholder-color", draw);
}
// Set ARGB
// We need to set over, otherwise subpixel hinting wont work.
switch (pango_layout_get_alignment(tb->layout)) {
case PANGO_ALIGN_CENTER: {
int rem =
MAX(0, tb->widget.w - widget_padding_get_padding_width(WIDGET(tb)) -
line_width);
x = (tb->xalign - 0.5) * rem + widget_padding_get_left(WIDGET(tb));
cairo_move_to(draw, x, top);
break;
}
case PANGO_ALIGN_RIGHT: {
int rem =
MAX(0, tb->widget.w - widget_padding_get_padding_width(WIDGET(tb)) -
line_width);
x = -(1.0 - tb->xalign) * rem + widget_padding_get_left(WIDGET(tb));
cairo_move_to(draw, x, top);
break;
}
default: {
int rem =
MAX(0, tb->widget.w - widget_padding_get_padding_width(WIDGET(tb)) -
line_width);
x = tb->xalign * rem + widget_padding_get_left(WIDGET(tb));
cairo_move_to(draw, x, top);
break;
}
}
cairo_save(draw);
cairo_reset_clip(draw);
pango_cairo_show_layout(draw, tb->layout);
cairo_restore(draw);
// draw the cursor
rofi_theme_get_color(WIDGET(tb), "text-color", draw);
if (tb->flags & TB_EDITABLE && tb->blink) {
// 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);
}
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 * M_PI);
cairo_fill(draw);
}
}
// cursor handling for edit mode
void textbox_cursor(textbox *tb, int pos) {
if (tb == NULL) {
return;
}
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
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) {
if (tb == NULL) {
return;
}
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) {
if (tb == NULL) {
return;
}
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 == NULL || 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 && tb->cursor > 0) {
textbox_cursor_dec(tb);
textbox_cursor_del(tb);
}
}
static void textbox_cursor_bkspc_word(textbox *tb) {
if (tb && 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 && 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 && tb->cursor >= 0) {
int length = tb->cursor;
textbox_delete(tb, 0, length);
}
}
static void textbox_cursor_del_word(textbox *tb) {
if (tb && 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 == NULL) {
return 0;
}
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, Ctrl-Left
case MOVE_WORD_BACK:
textbox_cursor_dec_word(tb);
return 2;
// Alt-F, Ctrl-Right
case MOVE_WORD_FORWARD:
textbox_cursor_inc_word(tb);
return 2;
// BackSpace, Shift-BackSpace, Ctrl-h
case REMOVE_CHAR_BACK:
textbox_cursor_bkspc(tb);
return 1;
default:
g_return_val_if_reached(0);
}
}
gboolean textbox_append_text(textbox *tb, const char *pad, const int pad_len) {
if (tb == NULL) {
return FALSE;
}
if (!(tb->flags & TB_EDITABLE)) {
return FALSE;
}
// Filter When alt/ctrl is pressed do not accept the character.
gboolean used_something = FALSE;
const gchar *w, *n, *e;
for (w = pad, n = g_utf8_next_char(w), e = w + pad_len; w < e;
w = n, n = g_utf8_next_char(n)) {
if (g_unichar_iscntrl(g_utf8_get_char(w))) {
continue;
}
textbox_insert(tb, tb->cursor, w, n - w);
textbox_cursor(tb, tb->cursor + 1);
used_something = TRUE;
}
return used_something;
}
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;
PangoLayout *layout = pango_layout_new(p_context);
pango_layout_set_text(layout, "aAjb", -1);
PangoRectangle rect;
pango_layout_get_pixel_extents(layout, NULL, &rect);
tbfc->height = rect.y + rect.height;
g_object_unref(layout);
tbfc_default = tbfc;
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_estimated_height(
tb, pango_layout_get_line_count(tb->layout));
}
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) {
PangoRectangle rect;
pango_layout_get_pixel_extents(tb->layout, NULL, &rect);
return rect.height + rect.y;
}
int textbox_get_font_width(const textbox *tb) {
PangoRectangle rect;
pango_layout_get_pixel_extents(tb->layout, NULL, &rect);
return rect.width + rect.x;
}
/** Caching for the estimated character height. (em) */
double textbox_get_estimated_char_height(void) { return tbfc_default->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;
}
/** Cache storing the estimated width of a digit (ch). */
static double ch_width = -1;
double textbox_get_estimated_ch(void) {
if (ch_width < 0) {
int width = pango_font_metrics_get_approximate_digit_width(p_metrics);
ch_width = (width) / (double)PANGO_SCALE;
}
return ch_width;
}
int textbox_get_estimated_height(const textbox *tb, int eh) {
int height = tb->tbfc->height;
return (eh * height) + widget_padding_get_padding_height(WIDGET(tb));
}
int textbox_get_desired_width(widget *wid, G_GNUC_UNUSED const int height) {
if (wid == NULL) {
return 0;
}
textbox *tb = (textbox *)wid;
unsigned int offset = ((tb->flags & TB_INDICATOR) ? DOT_OFFSET : 0);
if (wid->expand && tb->flags & TB_AUTOWIDTH) {
return textbox_get_font_width(tb) + widget_padding_get_padding_width(wid) +
offset;
}
RofiDistance w = rofi_theme_get_distance(WIDGET(tb), "width", 0);
int wi = distance_get_pixel(w, ROFI_ORIENTATION_HORIZONTAL);
if (wi > 0) {
return wi;
}
int padding = widget_padding_get_left(WIDGET(tb));
padding += widget_padding_get_right(WIDGET(tb));
int old_width = pango_layout_get_width(tb->layout);
pango_layout_set_width(tb->layout, -1);
int width = textbox_get_font_width(tb);
// Restore.
pango_layout_set_width(tb->layout, old_width);
return width + padding + offset;
}
void textbox_set_ellipsize(textbox *tb, PangoEllipsizeMode mode) {
if (tb) {
tb->emode = mode;
if ((tb->flags & TB_WRAP) != TB_WRAP) {
// Store the mode.
pango_layout_set_ellipsize(tb->layout, tb->emode);
widget_queue_redraw(WIDGET(tb));
}
}
}
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