rofi/source/widgets/listview.c

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/**
* MIT/X11 License
2017-01-03 16:59:28 +00:00
* Modified (c) 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 <glib.h>
#include <widgets/widget.h>
#include <widgets/textbox.h>
#include <widgets/listview.h>
#include <widgets/scrollbar.h>
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#include "settings.h"
#include "theme.h"
#define DEFAULT_SPACING 2
struct _listview
{
widget widget;
// RChanged
// Text needs to be repainted.
unsigned int rchanged;
// Administration
unsigned int cur_page;
unsigned int last_offset;
unsigned int selected;
unsigned int element_height;
unsigned int element_width;
unsigned int max_rows;
unsigned int max_elements;
//
unsigned int cur_columns;
unsigned int req_elements;
unsigned int cur_elements;
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Distance spacing;
unsigned int menu_lines;
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unsigned int max_displayed_lines;
unsigned int menu_columns;
unsigned int fixed_num_lines;
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unsigned int dynamic;
unsigned int eh;
unsigned int reverse;
gboolean cycle;
gboolean multi_select;
ScrollType scroll_type;
textbox **boxes;
scrollbar *scrollbar;
listview_update_callback callback;
void *udata;
gboolean scrollbar_scroll;
xcb_timestamp_t last_click;
listview_mouse_activated_cb mouse_activated;
void *mouse_activated_data;
};
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static int listview_get_desired_height ( widget *wid );
static void listview_free ( widget *wid )
{
listview *lv = (listview *) wid;
for ( unsigned int i = 0; i < lv->cur_elements; i++ ) {
widget_free ( WIDGET ( lv->boxes [i] ) );
}
g_free ( lv->boxes );
widget_free ( WIDGET ( lv->scrollbar ) );
g_free ( lv );
}
static unsigned int scroll_per_page ( listview * lv )
{
int offset = 0;
// selected row is always visible.
// If selected is visible do not scroll.
if ( ( ( lv->selected - ( lv->last_offset ) ) < ( lv->max_elements ) ) && ( lv->selected >= ( lv->last_offset ) ) ) {
offset = lv->last_offset;
}
else{
// Do paginating
unsigned int page = ( lv->max_elements > 0 ) ? ( lv->selected / lv->max_elements ) : 0;
offset = page * lv->max_elements;
if ( page != lv->cur_page ) {
lv->cur_page = page;
lv->rchanged = TRUE;
}
// Set the position
//scrollbar_set_handle ( lv->scrollbar, page * lv->max_elements );
}
return offset;
}
static unsigned int scroll_continious ( listview *lv )
{
unsigned int middle = ( lv->max_rows - ( ( lv->max_rows & 1 ) == 0 ) ) / 2;
unsigned int offset = 0;
if ( lv->selected > middle ) {
if ( lv->selected < ( lv->req_elements - ( lv->max_rows - middle ) ) ) {
offset = lv->selected - middle;
}
// Don't go below zero.
else if ( lv->req_elements > lv->max_rows ) {
offset = lv->req_elements - lv->max_rows;
}
}
if ( offset != lv->cur_page ) {
//scrollbar_set_handle ( lv->scrollbar, offset );
lv->cur_page = offset;
lv->rchanged = TRUE;
}
return offset;
}
static void update_element ( listview *lv, unsigned int tb, unsigned int index, gboolean full )
{
// Select drawing mode
TextBoxFontType type = ( index & 1 ) == 0 ? NORMAL : ALT;
type = ( index ) == lv->selected ? HIGHLIGHT : type;
if ( lv->callback ) {
lv->callback ( lv->boxes[tb], index, lv->udata, type, full );
}
}
static void listview_draw ( widget *wid, cairo_t *draw )
{
unsigned int offset = 0;
listview *lv = (listview *) wid;
if ( lv->scroll_type == LISTVIEW_SCROLL_CONTINIOUS ) {
offset = scroll_continious ( lv );
}
else {
offset = scroll_per_page ( lv );
}
// Set these all together to make sure they update consistently.
scrollbar_set_max_value ( lv->scrollbar, lv->req_elements );
scrollbar_set_handle_length ( lv->scrollbar, lv->cur_columns * lv->max_rows );
scrollbar_set_handle ( lv->scrollbar, lv->selected );
lv->last_offset = offset;
int spacing_vert = distance_get_pixel ( lv->spacing, ORIENTATION_VERTICAL );
int spacing_hori = distance_get_pixel ( lv->spacing, ORIENTATION_HORIZONTAL );
if ( lv->cur_elements > 0 && lv->max_rows > 0 ) {
// Set new x/y possition.
unsigned int max = MIN ( lv->cur_elements, lv->req_elements - offset );
if ( lv->rchanged ) {
unsigned int width = lv->widget.w - spacing_hori * ( lv->cur_columns - 1 );
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width -= widget_padding_get_padding_width ( wid );
if ( widget_enabled ( WIDGET ( lv->scrollbar ) ) ) {
width -= spacing_hori;
width -= widget_get_width ( WIDGET ( lv->scrollbar ) );
}
unsigned int element_width = ( width ) / lv->cur_columns;
for ( unsigned int i = 0; i < max; i++ ) {
unsigned int ex = widget_padding_get_left ( wid ) + ( ( i ) / lv->max_rows ) * ( element_width + spacing_hori );
if ( lv->reverse ) {
unsigned int ey = wid->h-(widget_padding_get_bottom ( wid ) + ( ( i ) % lv->max_rows ) * ( lv->element_height + spacing_vert ))-lv->element_height;
textbox_moveresize ( lv->boxes[i], ex, ey, element_width, lv->element_height );
} else {
unsigned int ey = widget_padding_get_top ( wid ) + ( ( i ) % lv->max_rows ) * ( lv->element_height + spacing_vert );
textbox_moveresize ( lv->boxes[i], ex, ey, element_width, lv->element_height );
}
update_element ( lv, i, i + offset, TRUE );
widget_draw ( WIDGET ( lv->boxes[i] ), draw );
}
lv->rchanged = FALSE;
}
else {
for ( unsigned int i = 0; i < max; i++ ) {
update_element ( lv, i, i + offset, FALSE );
widget_draw ( WIDGET ( lv->boxes[i] ), draw );
}
}
widget_draw ( WIDGET ( lv->scrollbar ), draw );
}
}
static void listview_recompute_elements ( listview *lv )
{
unsigned int newne = 0;
if ( lv->max_rows == 0 ) {
return;
}
if ( lv->req_elements < lv->max_elements ) {
newne = lv->req_elements;
lv->cur_columns = ( lv->req_elements + ( lv->max_rows - 1 ) ) / lv->max_rows;
}
else {
newne = lv->max_elements;
lv->cur_columns = lv->menu_columns;
}
for ( unsigned int i = newne; i < lv->cur_elements; i++ ) {
widget_free ( WIDGET ( lv->boxes[i] ) );
}
lv->boxes = g_realloc ( lv->boxes, newne * sizeof ( textbox* ) );
if ( newne > 0 ) {
for ( unsigned int i = lv->cur_elements; i < newne; i++ ) {
TextboxFlags flags = ( lv->multi_select ) ? TB_INDICATOR : 0;
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char *name = g_strjoin (".", lv->widget.name,"element", NULL);
lv->boxes[i] = textbox_create ( name, flags, NORMAL, "" );
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g_free ( name );
}
}
lv->rchanged = TRUE;
lv->cur_elements = newne;
}
void listview_set_num_elements ( listview *lv, unsigned int rows )
{
lv->req_elements = rows;
listview_set_selected ( lv, lv->selected );
listview_recompute_elements ( lv );
widget_queue_redraw ( WIDGET ( lv ) );
}
unsigned int listview_get_selected ( listview *lv )
{
if ( lv != NULL ) {
return lv->selected;
}
return 0;
}
void listview_set_selected ( listview *lv, unsigned int selected )
{
if ( lv && lv->req_elements > 0 ) {
lv->selected = MIN ( selected, lv->req_elements - 1 );
widget_queue_redraw ( WIDGET ( lv ) );
}
}
static void listview_resize ( widget *wid, short w, short h )
{
listview *lv = (listview *) wid;
lv->widget.w = MAX ( 0, w );
lv->widget.h = MAX ( 0, h );
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int height = lv->widget.h - widget_padding_get_padding_height ( WIDGET (lv) );
int spacing_vert = distance_get_pixel ( lv->spacing, ORIENTATION_VERTICAL );
lv->max_rows = ( spacing_vert + height ) / ( lv->element_height + spacing_vert );
lv->max_elements = lv->max_rows * lv->menu_columns;
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widget_move ( WIDGET ( lv->scrollbar ),
lv->widget.w - widget_padding_get_right ( WIDGET ( lv ) ) - widget_get_width ( WIDGET ( lv->scrollbar ) ),
widget_padding_get_top ( WIDGET (lv ) ));
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widget_resize ( WIDGET ( lv->scrollbar ), widget_get_width ( WIDGET ( lv->scrollbar ) ), height );
listview_recompute_elements ( lv );
widget_queue_redraw ( wid );
}
static gboolean listview_scrollbar_clicked ( widget *sb, xcb_button_press_event_t * xce, void *udata )
{
listview *lv = (listview *) udata;
unsigned int sel = scrollbar_clicked ( (scrollbar *) sb, xce->event_y );
listview_set_selected ( lv, sel );
return TRUE;
}
static gboolean listview_clicked ( widget *wid, xcb_button_press_event_t *xce, G_GNUC_UNUSED void *udata )
{
listview *lv = (listview *) wid;
lv->scrollbar_scroll = FALSE;
if ( widget_enabled ( WIDGET ( lv->scrollbar ) ) && widget_intersect ( WIDGET ( lv->scrollbar ), xce->event_x, xce->event_y ) ) {
// Forward to handler of scrollbar.
xcb_button_press_event_t xce2 = *xce;
xce->event_x -= widget_get_x_pos ( WIDGET ( lv->scrollbar ) );
xce->event_y -= widget_get_y_pos ( WIDGET ( lv->scrollbar ) );
lv->scrollbar_scroll = TRUE;
return widget_clicked ( WIDGET ( lv->scrollbar ), &xce2 );
}
// Handle the boxes.
unsigned int max = MIN ( lv->cur_elements, lv->req_elements - lv->last_offset );
for ( unsigned int i = 0; i < max; i++ ) {
widget *w = WIDGET ( lv->boxes[i] );
if ( widget_intersect ( w, xce->event_x, xce->event_y ) ) {
if ( ( lv->last_offset + i ) == lv->selected ) {
if ( ( xce->time - lv->last_click ) < 200 ) {
// Somehow signal we accepted item.
lv->mouse_activated ( lv, xce, lv->mouse_activated_data );
}
}
else {
listview_set_selected ( lv, lv->last_offset + i );
}
lv->last_click = xce->time;
return TRUE;
}
}
return FALSE;
}
static gboolean listview_motion_notify ( widget *wid, xcb_motion_notify_event_t *xme )
{
listview *lv = (listview *) wid;
if ( widget_enabled ( WIDGET ( lv->scrollbar ) ) && lv->scrollbar_scroll ) {
xcb_motion_notify_event_t xle = *xme;
xle.event_x -= wid->x;
xle.event_y -= wid->y;
widget_motion_notify ( WIDGET ( lv->scrollbar ), &xle );
return TRUE;
}
return FALSE;
}
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listview *listview_create ( const char *name, listview_update_callback cb, void *udata, unsigned int eh )
{
listview *lv = g_malloc0 ( sizeof ( listview ) );
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widget_init ( WIDGET ( lv ), name, "@listview" );
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lv->widget.free = listview_free;
lv->widget.resize = listview_resize;
lv->widget.draw = listview_draw;
lv->widget.clicked = listview_clicked;
lv->widget.motion_notify = listview_motion_notify;
lv->widget.get_desired_height = listview_get_desired_height;
lv->widget.enabled = TRUE;
lv->eh = eh;
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char *n = g_strjoin(".", lv->widget.name,"scrollbar", NULL);
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lv->scrollbar = scrollbar_create ( n, 4);
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g_free(n);
widget_set_clicked_handler ( WIDGET ( lv->scrollbar ), listview_scrollbar_clicked, lv );
lv->scrollbar->widget.parent = WIDGET ( lv );
// Calculate height of an element.
//
char *tb_name = g_strjoin (".", lv->widget.name,"element", NULL);
textbox *tb = textbox_create ( tb_name, 0, NORMAL, "" );
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lv->element_height = textbox_get_estimated_height (tb, lv->eh);
g_free(tb_name);
lv->callback = cb;
lv->udata = udata;
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// Some settings.
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lv->spacing = rofi_theme_get_distance (lv->widget.class_name, lv->widget.name, NULL, "spacing", DEFAULT_SPACING );
lv->menu_columns = rofi_theme_get_integer (lv->widget.class_name, lv->widget.name, NULL, "columns", config.menu_columns );
lv->fixed_num_lines = rofi_theme_get_boolean (lv->widget.class_name, lv->widget.name, NULL, "fixed-height", config.fixed_num_lines );
lv->dynamic = rofi_theme_get_boolean (lv->widget.class_name, lv->widget.name, NULL, "dynamic", TRUE );
lv->reverse = rofi_theme_get_boolean (lv->widget.class_name, lv->widget.name, NULL, "reverse", FALSE );
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listview_set_show_scrollbar ( lv, rofi_theme_get_boolean ( lv->widget.class_name, lv->widget.name, NULL, "scrollbar", !config.hide_scrollbar ));
listview_set_scrollbar_width ( lv, rofi_theme_get_integer ( lv->widget.class_name, lv->widget.name, NULL, "scrollbar-width", config.scrollbar_width ));
lv->cycle = rofi_theme_get_boolean ( lv->widget.class_name, lv->widget.name, NULL, "cycle", config.cycle );
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return lv;
}
/**
* Navigation commands.
*/
static void listview_nav_up_int ( listview *lv )
{
if ( lv == NULL ) {
return;
}
if ( lv->req_elements == 0 || ( lv->selected == 0 && !lv->cycle ) ) {
return;
}
if ( lv->selected == 0 ) {
lv->selected = lv->req_elements;
}
lv->selected--;
widget_queue_redraw ( WIDGET ( lv ) );
}
static void listview_nav_down_int ( listview *lv )
{
if ( lv == NULL ) {
return;
}
if ( lv->req_elements == 0 || ( lv->selected == ( lv->req_elements - 1 ) && !lv->cycle ) ) {
return;
}
lv->selected = lv->selected < lv->req_elements - 1 ? MIN ( lv->req_elements - 1, lv->selected + 1 ) : 0;
widget_queue_redraw ( WIDGET ( lv ) );
}
void listview_nav_up ( listview *lv )
{
if ( lv->reverse ) {
listview_nav_down_int ( lv );
} else {
listview_nav_up_int ( lv );
}
}
void listview_nav_down ( listview *lv )
{
if ( lv->reverse ) {
listview_nav_up_int ( lv );
} else {
listview_nav_down_int ( lv );
}
}
void listview_nav_left ( listview *lv )
{
if ( lv == NULL ) {
return;
}
if ( lv->selected >= lv->max_rows ) {
lv->selected -= lv->max_rows;
widget_queue_redraw ( WIDGET ( lv ) );
}
}
void listview_nav_right ( listview *lv )
{
if ( lv == NULL ) {
return;
}
if ( ( lv->selected + lv->max_rows ) < lv->req_elements ) {
lv->selected += lv->max_rows;
widget_queue_redraw ( WIDGET ( lv ) );
}
else if ( lv->selected < ( lv->req_elements - 1 ) ) {
// We do not want to move to last item, UNLESS the last column is only
// partially filled, then we still want to move column and select last entry.
// First check the column we are currently in.
int col = lv->selected / lv->max_rows;
// Check total number of columns.
int ncol = lv->req_elements / lv->max_rows;
// If there is an extra column, move.
if ( col != ncol ) {
lv->selected = lv->req_elements - 1;
widget_queue_redraw ( WIDGET ( lv ) );
}
}
}
static void listview_nav_page_prev_int ( listview *lv )
{
if ( lv == NULL ) {
return;
}
if ( lv->selected < lv->max_elements ) {
lv->selected = 0;
}
else{
lv->selected -= ( lv->max_elements );
}
widget_queue_redraw ( WIDGET ( lv ) );
}
static void listview_nav_page_next_int ( listview *lv )
{
if ( lv == NULL ) {
return;
}
if ( lv->req_elements == 0 ) {
return;
}
lv->selected += ( lv->max_elements );
if ( lv->selected >= lv->req_elements ) {
lv->selected = lv->req_elements - 1;
}
widget_queue_redraw ( WIDGET ( lv ) );
}
void listview_nav_page_prev ( listview *lv )
{
if ( lv->reverse ){
listview_nav_page_next_int ( lv );
} else {
listview_nav_page_prev_int ( lv );
}
}
void listview_nav_page_next ( listview *lv )
{
if ( lv->reverse ){
listview_nav_page_prev_int ( lv );
} else {
listview_nav_page_next_int ( lv );
}
}
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static int listview_get_desired_height ( widget *wid )
{
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listview *lv = (listview *)wid;
int spacing = distance_get_pixel ( lv->spacing, ORIENTATION_VERTICAL );
if ( lv == NULL || lv->widget.enabled == FALSE ) {
return 0;
}
int h = lv->menu_lines;
if ( !( lv->fixed_num_lines ) ) {
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if ( lv->dynamic ) {
h = MIN ( lv->menu_lines, lv->req_elements );
} else {
h = MIN ( lv->menu_lines, lv->max_displayed_lines );
}
}
if ( h == 0 ) {
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return widget_padding_get_padding_height ( WIDGET (lv) );
}
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int height = widget_padding_get_padding_height ( WIDGET (lv) );
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height += h*(lv->element_height+spacing) - spacing;
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return height;
}
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void listview_set_show_scrollbar ( listview *lv, gboolean enabled )
{
if ( lv ) {
if ( enabled ) {
widget_enable ( WIDGET ( lv->scrollbar ) );
}
else {
widget_disable ( WIDGET ( lv->scrollbar ) );
}
listview_recompute_elements ( lv );
}
}
void listview_set_scrollbar_width ( listview *lv, unsigned int width )
{
if ( lv ) {
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scrollbar_set_width ( lv->scrollbar, width );
}
}
void listview_set_scroll_type ( listview *lv, ScrollType type )
{
if ( lv ) {
lv->scroll_type = type;
}
}
void listview_set_mouse_activated_cb ( listview *lv, listview_mouse_activated_cb cb, void *udata )
{
if ( lv ) {
lv->mouse_activated = cb;
lv->mouse_activated_data = udata;
}
}
void listview_set_multi_select ( listview *lv, gboolean enable )
{
if ( lv ) {
lv->multi_select = enable;
}
}
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void listview_set_num_lines ( listview *lv, unsigned int num_lines )
{
if ( lv ) {
lv->menu_lines = num_lines;
}
}
void listview_set_max_lines ( listview *lv, unsigned int max_lines )
{
if ( lv ) {
lv->max_displayed_lines = max_lines;
}
}