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awesome/widgets/tasklist.c

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/*
* tasklist.c - task list widget
*
* Copyright © 2008 Julien Danjou <julien@danjou.info>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include "client.h"
#include "widget.h"
#include "ewmh.h"
#include "tag.h"
#include "common/markup.h"
#include "common/tokenize.h"
extern awesome_t globalconf;
/** Link a client and a label */
typedef struct
{
/** A client */
client_t *client;
/** The client label */
char *label;
/** The client label len */
size_t label_len;
} client_label_t;
/** Delete a client label.
* \param l The client label.
*/
static void
client_label_wipe(client_label_t *l)
{
p_delete(&l->label);
}
DO_ARRAY(client_label_t, client_label, client_label_wipe)
typedef struct tasklist_object_data_t tasklist_object_data_t;
/** Link an object with a client label array and other infos */
struct tasklist_object_data_t
{
/** The object */
void *object;
/** The box width for each client */
int box_width;
/** The client label array for the object */
client_label_array_t client_labels;
/** This is a list */
tasklist_object_data_t *prev, *next;
};
static void
tasklist_object_data_delete(tasklist_object_data_t **l)
{
client_label_array_wipe(&(*l)->client_labels);
p_delete(l);
}
DO_SLIST(tasklist_object_data_t, tasklist_object_data, tasklist_object_data_delete)
/** The tasklist private data structure. */
typedef struct
{
bool show_icons;
luaA_ref label;
tasklist_object_data_t *objects_data;
bool invert;
} tasklist_data_t;
/** Get an object data by its object.
* \param od The object data list.
* \param p The object.
* \return A object data or NULL if not found.
*/
static tasklist_object_data_t *
tasklist_object_data_getbyobj(tasklist_object_data_t *od, void *p)
{
tasklist_object_data_t *o;
for(o = od; o; o = o->next)
if(o->object == p)
return o;
return NULL;
}
/** Draw an item in a tasklist widget.
* \param ctx The draw context, must be the same used to draw the tasklist
* \param w Tasklist widget node
* \param odata Tasklist object data
* \param width_mod Width modification of the item
* \param pos Position to draw the item at
* \param i Item to draw
*/
static void
tasklist_draw_item(draw_context_t *ctx,
widget_node_t *w,
tasklist_object_data_t *odata,
int width_mod, int pos, int i) {
draw_parser_data_t pdata, *parser_data;
image_t *image;
area_t area;
tasklist_data_t *d = w->widget->data;
int icon_width = 0;
if(d->show_icons)
{
draw_parser_data_init(&pdata);
/* Actually look for the proper background color, since
* otherwise the background statusbar color is used instead */
if(draw_text_markup_expand(&pdata,
odata->client_labels.tab[i].label,
odata->client_labels.tab[i].label_len))
{
parser_data = &pdata;
if(pdata.has_bg_color)
{
/* draw a background for icons */
area.x = w->area.x + pos;
area.y = w->area.y;
area.height = ctx->height;
area.width = odata->box_width;
draw_rectangle(ctx, area, 1.0, true, &pdata.bg_color);
}
}
else
parser_data = NULL;
if(odata->client_labels.tab[i].client->icon)
{
image = odata->client_labels.tab[i].client->icon;
icon_width = ((double) ctx->height / (double) image->height) * image->width;
draw_image(ctx, w->area.x + odata->box_width * i,
w->area.y, ctx->height, image);
}
}
else
parser_data = NULL;
area.x = w->area.x + icon_width + pos;
area.y = w->area.y;
area.width = odata->box_width - icon_width + width_mod;
area.height = ctx->height;
draw_text(ctx, globalconf.font, area,
odata->client_labels.tab[i].label,
odata->client_labels.tab[i].label_len,
parser_data);
draw_parser_data_wipe(parser_data);
}
/** Draw a tasklist widget.
* \param ctx The draw context.
* \param screen The screen number.
* \param w The widget node we are called from.
* \param offset The offset to draw at.
* \param used The already used width.
* \param p A pointer to the object we're drawing onto.
* \param type The object type.
* \return The widget width.
*/
static int
tasklist_draw(draw_context_t *ctx, int screen,
widget_node_t *w,
int offset, int used, void *p,
awesome_type_t type)
{
client_t *c;
tasklist_data_t *d = w->widget->data;
int i = 0, box_width_rest = 0, pos = 0;
tasklist_object_data_t *odata;
if(used >= ctx->width)
return (w->area.width = 0);
if(!(odata = tasklist_object_data_getbyobj(d->objects_data, p)))
{
odata = p_new(tasklist_object_data_t, 1);
odata->object = p;
tasklist_object_data_list_push(&d->objects_data, odata);
}
client_label_array_wipe(&odata->client_labels);
client_label_array_init(&odata->client_labels);
for(c = globalconf.clients; c; c = c->next)
if(!c->skiptb
&& !c->ishidden
&& c->type != WINDOW_TYPE_SPLASH
&& c->type != WINDOW_TYPE_DOCK
&& c->type != WINDOW_TYPE_DESKTOP)
{
/* push client */
luaA_client_userdata_new(globalconf.L, c);
/* push screen we're at */
lua_pushnumber(globalconf.L, screen + 1);
/* call label function with client as argument and wait for one
* result */
if(luaA_dofunction(globalconf.L, d->label, 2, 1))
{
/* If we got a string as returned value, we got something to write:
* a label. So we store it in a client_label_t structure, pushed
* into the client_label_array_t which is owned by the object. */
if(lua_isstring(globalconf.L, -1))
{
client_label_t cl;
cl.client = c;
cl.label = a_strdup(lua_tolstring(globalconf.L, -1, &cl.label_len));
client_label_array_append(&odata->client_labels, cl);
}
lua_pop(globalconf.L, 1);
}
}
if(!odata->client_labels.len)
return (w->area.width = 0);
odata->box_width = (ctx->width - used) / odata->client_labels.len;
/* compute how many pixel we left empty */
box_width_rest = (ctx->width - used) % odata->client_labels.len;
w->area.x = widget_calculate_offset(ctx->width,
0, offset, w->widget->align);
w->area.y = 0;
if(d->invert)
for(i = odata->client_labels.len - 1; i >= 0; i--)
{
/* if we're on last elem, it has the last pixels left. */
if (i == 0)
tasklist_draw_item(ctx, w, odata, 0, pos, i);
else
tasklist_draw_item(ctx, w, odata, box_width_rest, pos, i);
pos += odata->box_width;
}
else
for(i = 0; i < odata->client_labels.len; i++)
{
/* if we're on last elem, it has the last pixels left. */
if(i != odata->client_labels.len - 1)
tasklist_draw_item(ctx, w, odata, 0, pos , i);
else
tasklist_draw_item(ctx, w, odata, box_width_rest, pos, i);
pos += odata->box_width;
}
w->area.width = ctx->width - used;
w->area.height = ctx->height;
return w->area.width;
}
/** Handle button click on tasklist.
* \param w The widget node.
* \param ev The button press event.
* \param screen The screen where the click was.
* \param object The object we're onto.
* \param type The type object.
*/
static void
tasklist_button(widget_node_t *w,
xcb_button_press_event_t *ev,
int screen,
void *object,
awesome_type_t type)
{
tasklist_data_t *d = w->widget->data;
int ci = 0;
tasklist_object_data_t *odata;
button_array_t *barr = &w->widget->buttons;
odata = tasklist_object_data_getbyobj(d->objects_data, object);
if(!odata || !odata->client_labels.len)
return;
if (!d->invert)
ci = (ev->event_x - w->area.x) / odata->box_width;
else
ci = odata->client_labels.len - 1 - (ev->event_x - w->area.x) / odata->box_width;
for(int i = 0; i < barr->len; i++)
if(ev->detail == barr->tab[i]->button
&& XUTIL_MASK_CLEAN(ev->state) == barr->tab[i]->mod)
{
luaA_pushpointer(globalconf.L, object, type);
luaA_client_userdata_new(globalconf.L, odata->client_labels.tab[ci].client);
luaA_dofunction(globalconf.L,
ev->response_type == XCB_BUTTON_PRESS ?
barr->tab[i]->press : barr->tab[i]->release,
2, 0);
}
}
/** Tasklist widget.
* \param L The Lua VM state.
* \param token The key token.
* \return The number of elements pushed on stack.
* \luastack
* \lfield show_icons Show icons near client title.
* \lfield label Function used to get the string to display as the window title.
* It gets the client and a screen number as argument, and must return a string.
*/
static int
luaA_tasklist_index(lua_State *L, awesome_token_t token)
{
widget_t **widget = luaA_checkudata(L, 1, "widget");
tasklist_data_t *d = (*widget)->data;
switch(token)
{
case A_TK_SHOW_ICONS:
lua_pushboolean(L, d->show_icons);
return 1;
case A_TK_LABEL:
lua_rawgeti(L, LUA_REGISTRYINDEX, d->label);
return 1;
case A_TK_INVERT:
lua_pushboolean(L, d->invert);
return 1;
default:
return 0;
}
}
/** Newindex function for tasklist widget.
* \param L The Lua VM state.
* \param token The key token.
* \return The number of elements pushed on stack.
*/
static int
luaA_tasklist_newindex(lua_State *L, awesome_token_t token)
{
widget_t **widget = luaA_checkudata(L, 1, "widget");
tasklist_data_t *d = (*widget)->data;
switch(token)
{
case A_TK_SHOW_ICONS:
d->show_icons = luaA_checkboolean(L, 3);
break;
case A_TK_LABEL:
luaA_registerfct(L, 3, &d->label);
break;
case A_TK_INVERT:
d->invert = luaA_checkboolean(L, 3);
break;
default:
return 0;
}
widget_invalidate_bywidget(*widget);
return 0;
}
/** Destructor for the tasklist widget.
* \param widget The widget to destroy.
*/
static void
tasklist_destructor(widget_t *widget)
{
tasklist_data_t *d = widget->data;
tasklist_object_data_list_wipe(&d->objects_data);
p_delete(&d);
}
/** Tasklist detach function.
* \param widget The widget which is detaching.
* \param object The object we are leaving.
*/
static void
tasklist_detach(widget_t *widget, void *object)
{
tasklist_data_t *d = widget->data;
tasklist_object_data_t *od;
if((od = tasklist_object_data_getbyobj(d->objects_data, object)))
{
tasklist_object_data_list_detach(&d->objects_data, od);
tasklist_object_data_delete(&od);
}
}
/** Create a new widget tasklist.
* \param align The widget alignment, which is flex anyway.
* \return A brand new tasklist widget.
*/
widget_t *
tasklist_new(alignment_t align __attribute__ ((unused)))
{
widget_t *w;
tasklist_data_t *d;
w = p_new(widget_t, 1);
widget_common_new(w);
w->draw = tasklist_draw;
w->button = tasklist_button;
w->align = AlignFlex;
w->index = luaA_tasklist_index;
w->newindex = luaA_tasklist_newindex;
w->data = d = p_new(tasklist_data_t, 1);
w->destructor = tasklist_destructor;
w->detach = tasklist_detach;
d->show_icons = true;
d->label = LUA_REFNIL;
d->invert = false;
/* Set cache property */
w->cache_flags = WIDGET_CACHE_CLIENTS | WIDGET_CACHE_TAGS;
return w;
}
// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80
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