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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 "widget.h"
#include "focus.h"
#include "ewmh.h"
#include "tag.h"
#include "common/markup.h"
#include "common/tokenize.h"
extern awesome_t globalconf;
typedef enum
{
ShowFocus,
ShowTags,
ShowAll,
} showclient_t;
/** The tasklist private data structure. */
typedef struct
{
showclient_t show;
bool show_icons;
luaA_function label;
} tasklist_data_t;
struct tasklist_hook_data
{
draw_context_t *ctx;
area_t *area;
};
/** Check if a client is visible according to the showclient type paramater.
* \param c The client.
* \param screen The screen number.
* \param show The show parameters.
* \return True if the client is visible, false otherwise.
*/
static inline bool
tasklist_isvisible(client_t *c, int screen, showclient_t show)
{
if(c->skip || c->skiptb)
return false;
switch(show)
{
case ShowAll:
return (c->screen == screen);
case ShowTags:
return client_isvisible(c, screen);
case ShowFocus:
return (c == focus_get_current_client(screen));
}
return false;
}
/** Called when a markup element is found.
* \param p The markup parser data.
* \param elem The element name.
* \param names The attributes names.
* \param values The attributes values.
*/
static void
tasklist_markup_on_elem(markup_parser_data_t *p, const char *elem,
const char **names, const char **values)
{
struct tasklist_hook_data *data = p->priv;
draw_context_t *ctx = data->ctx;
assert(!a_strcmp(elem, "bg"));
for(; *names; names++, values++)
if(!a_strcmp(*names, "color"))
{
xcolor_t bg_color;
xcolor_init(&bg_color, ctx->connection, ctx->phys_screen, *values);
draw_rectangle(ctx, *data->area, 1.0, true, &bg_color);
break;
}
}
/** 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.
*/
static int
tasklist_draw(draw_context_t *ctx, int screen,
widget_node_t *w,
int offset, int used, void *p __attribute__ ((unused)))
{
client_t *c;
tasklist_data_t *d = w->widget->data;
area_t area;
const char *text;
int n = 0, i = 0, box_width = 0, icon_width = 0, box_width_rest = 0;
netwm_icon_t *icon;
draw_image_t *image;
size_t len;
if(used >= ctx->width)
return (w->area.width = 0);
for(c = globalconf.clients; c; c = c->next)
if(tasklist_isvisible(c, screen, d->show))
n++;
if(!n)
return (w->area.width = 0);
box_width = (ctx->width - used) / n;
/* compute how many pixel we left empty */
box_width_rest = (ctx->width - used) % n;
w->area.x = widget_calculate_offset(ctx->width,
0, offset, w->widget->align);
w->area.y = 0;
for(c = globalconf.clients; c; c = c->next)
if(tasklist_isvisible(c, screen, d->show))
{
icon_width = 0;
/* push client */
luaA_client_userdata_new(globalconf.L, c);
/* call label function with client as argument and wait for one
* result */
luaA_dofunction(globalconf.L, d->label, 1, 1);
if(lua_isstring(globalconf.L, -1))
text = lua_tolstring(globalconf.L, -1, &len);
else
text = NULL;
lua_pop(globalconf.L, 1);
if(d->show_icons)
{
static char const * const elements[] = { "bg", NULL };
struct tasklist_hook_data data = { .ctx = ctx, .area = &area };
markup_parser_data_t pdata =
{
.elements = elements,
.on_element = &tasklist_markup_on_elem,
.priv = &data,
};
/* draw a background for icons */
area.x = w->area.x + box_width * i;
area.y = w->area.y;
area.height = ctx->height;
area.width = box_width;
/* Actually look for the proper background color, since
* otherwise the background statusbar color is used instead */
markup_parser_data_init(&pdata);
markup_parse(&pdata, text, a_strlen(text));
markup_parser_data_wipe(&pdata);
if((image = draw_image_new(c->icon_path)))
{
icon_width = ((double) ctx->height / (double) image->height) * image->width;
draw_image(ctx, w->area.x + box_width * i,
w->area.y, ctx->height, image);
draw_image_delete(&image);
}
if(!icon_width && (icon = ewmh_get_window_icon(c->win)))
{
icon_width = ((double) ctx->height / (double) icon->height)
* icon->width;
draw_image_from_argb_data(ctx,
w->area.x + box_width * i,
w->area.y,
icon->width, icon->height,
ctx->height, icon->image);
p_delete(&icon->image);
p_delete(&icon);
}
}
area.x = w->area.x + icon_width + box_width * i;
area.y = w->area.y;
area.width = box_width - icon_width;
area.height = ctx->height;
/* if we're on last elem, it has the last pixels left */
if(i == n - 1)
area.width += box_width_rest;
draw_text(ctx, globalconf.font, area, text, NULL);
i++;
}
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_press(widget_node_t *w,
xcb_button_press_event_t *ev,
int screen,
void *object,
awesome_type_t type)
{
button_t *b;
client_t *c;
tasklist_data_t *d = w->widget->data;
int n = 0, box_width = 0, i, ci = 0;
for(c = globalconf.clients; c; c = c->next)
if(tasklist_isvisible(c, screen, d->show))
n++;
if(!n)
return;
box_width = w->area.width / n;
ci = (ev->event_x - w->area.x) / box_width;
/* found first visible client */
for(c = globalconf.clients;
c && !tasklist_isvisible(c, screen, d->show);
c = c->next);
/* found ci-th visible client */
for(i = 0; c ; c = c->next)
if(tasklist_isvisible(c, screen, d->show))
if(i++ >= ci)
break;
if(c)
for(b = w->widget->buttons; b; b = b->next)
if(ev->detail == b->button && CLEANMASK(ev->state) == b->mod && b->fct)
{
luaA_pushpointer(globalconf.L, object, type);
luaA_client_userdata_new(globalconf.L, c);
luaA_dofunction(globalconf.L, b->fct, 2, 0);
}
}
/** Index function for 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 show Which windows to show: all, tags, focus.
* \lfield label Function used to get the string to display as the window title.
* It gets the client 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_SHOW:
switch(d->show)
{
case ShowTags:
lua_pushliteral(L, "tags");
break;
case ShowFocus:
lua_pushliteral(L, "focus");
break;
case ShowAll:
lua_pushliteral(L, "all");
break;
default:
return 0;
}
return 1;
case A_TK_LABEL:
lua_rawgeti(L, LUA_REGISTRYINDEX, d->label);
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)
{
size_t len;
widget_t **widget = luaA_checkudata(L, 1, "widget");
tasklist_data_t *d = (*widget)->data;
const char *buf;
switch(token)
{
case A_TK_SHOW_ICONS:
d->show_icons = luaA_checkboolean(L, 3);
break;
case A_TK_SHOW:
if((buf = luaL_checklstring(L, 3, &len)))
switch(a_tokenize(buf, len))
{
case A_TK_TAGS:
d->show = ShowTags;
break;
case A_TK_FOCUS:
d->show = ShowFocus;
break;
case A_TK_ALL:
d->show = ShowAll;
break;
default:
break;
}
break;
case A_TK_LABEL:
luaA_registerfct(L, &d->label);
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;
p_delete(&d);
}
/** 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_press = tasklist_button_press;
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;
d->show_icons = true;
d->show = ShowTags;
d->label = LUA_REFNIL;
/* Set cache property */
w->cache_flags = WIDGET_CACHE_CLIENTS;
return w;
}
// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80
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