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awesome/widget.c

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/*
* widget.c - widget managing
*
* Copyright © 2007-2008 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 <math.h>
#include <xcb/xcb.h>
#include <xcb/xcb_atom.h>
#include "mouse.h"
#include "widget.h"
#include "wibox.h"
#include "common/atoms.h"
extern awesome_t globalconf;
DO_LUA_NEW(extern, widget_t, widget, "widget", widget_ref)
DO_LUA_GC(widget_t, widget, "widget", widget_unref)
DO_LUA_EQ(widget_t, widget, "widget")
#include "widgetgen.h"
/** Compute offset for drawing the first pixel of a widget.
* \param barwidth The wibox width.
* \param widgetwidth The widget width.
* \param alignment The widget alignment on wibox.
* \return The x coordinate to draw at.
*/
int
widget_calculate_offset(int barwidth, int widgetwidth, int offset, int alignment)
{
switch(alignment)
{
case AlignLeft:
case AlignFlex:
return offset;
}
return barwidth - offset - widgetwidth;
}
/** Common function for button press event on widget.
* It will look into configuration to find the callback function to call.
* \param w The widget node.
* \param ev The button press event the widget received.
* \param screen The screen number.
* \param p The object where user clicked.
*/
static void
widget_common_button(widget_node_t *w,
xcb_button_press_event_t *ev,
int screen __attribute__ ((unused)),
wibox_t *p)
{
button_array_t *b = &w->widget->buttons;
for(int i = 0; i < b->len; i++)
if(ev->detail == b->tab[i]->button
&& XUTIL_MASK_CLEAN(ev->state) == b->tab[i]->mod)
{
luaA_wibox_userdata_new(globalconf.L, p);
luaA_dofunction(globalconf.L,
ev->response_type == XCB_BUTTON_PRESS ?
b->tab[i]->press : b->tab[i]->release,
1, 0);
}
}
/** Convert a Lua table to a list of widget nodet.
* \param L The Lua VM state.
* \param widgets The linked list of widget node.
*/
void
luaA_table2widgets(lua_State *L, widget_node_array_t *widgets)
{
if(lua_istable(L, -1))
{
lua_pushnil(L);
while(luaA_next(L, -2))
{
luaA_table2widgets(L, widgets);
lua_pop(L, 1); /* remove value */
}
}
else
{
widget_t **widget = luaA_toudata(L, -1, "widget");
if(widget)
{
widget_node_t w;
p_clear(&w, 1);
w.widget = widget_ref(widget);
widget_node_array_append(widgets, w);
}
}
}
/** Render a list of widgets.
* \param wnode The list of widgets.
* \param ctx The draw context where to render.
* \param rotate_px The rotate pixmap: where to rotate and render the final
* pixmap when the object oritation is not east.
* \param screen The logical screen used to render.
* \param orientation The object orientation.
* \param x The x coordinates of the object.
* \param y The y coordinates of the object.
* \param wibox The wibox.
* \todo Remove GC.
*/
void
widget_render(widget_node_array_t *widgets, draw_context_t *ctx, xcb_gcontext_t gc, xcb_pixmap_t rotate_px,
int screen, orientation_t orientation,
int x, int y, wibox_t *wibox)
{
int left = 0, right = 0;
area_t rectangle = { 0, 0, 0, 0 };
rectangle.width = ctx->width;
rectangle.height = ctx->height;
if(ctx->bg.alpha != 0xffff)
{
xcb_get_property_reply_t *prop_r;
char *data;
xcb_pixmap_t rootpix;
xcb_get_property_cookie_t prop_c;
xcb_screen_t *s = xutil_screen_get(globalconf.connection, ctx->phys_screen);
prop_c = xcb_get_property_unchecked(globalconf.connection, false, s->root, _XROOTPMAP_ID,
PIXMAP, 0, 1);
if((prop_r = xcb_get_property_reply(globalconf.connection, prop_c, NULL)))
{
if(prop_r->value_len
&& (data = xcb_get_property_value(prop_r))
&& (rootpix = *(xcb_pixmap_t *) data))
switch(orientation)
{
case North:
draw_rotate(ctx,
rootpix, ctx->pixmap,
s->width_in_pixels, s->height_in_pixels,
ctx->width, ctx->height,
M_PI_2,
y + ctx->width,
- x);
break;
case South:
draw_rotate(ctx,
rootpix, ctx->pixmap,
s->width_in_pixels, s->height_in_pixels,
ctx->width, ctx->height,
- M_PI_2,
- y,
x + ctx->height);
break;
case East:
xcb_copy_area(globalconf.connection, rootpix,
rotate_px, gc,
x, y,
0, 0,
ctx->width, ctx->height);
break;
}
p_delete(&prop_r);
}
}
/* compute geometry */
for(int i = 0; i < widgets->len; i++)
if(widgets->tab[i].widget->align == AlignLeft && widgets->tab[i].widget->isvisible)
{
widgets->tab[i].geometry = widgets->tab[i].widget->geometry(widgets->tab[i].widget,
screen, ctx->height,
ctx->width - (left + right));
widgets->tab[i].geometry.x = left;
left += widgets->tab[i].geometry.width;
}
for(int i = widgets->len - 1; i >= 0; i--)
if(widgets->tab[i].widget->align == AlignRight && widgets->tab[i].widget->isvisible)
{
widgets->tab[i].geometry = widgets->tab[i].widget->geometry(widgets->tab[i].widget,
screen, ctx->height,
ctx->width - (left + right));
right += widgets->tab[i].geometry.width;
widgets->tab[i].geometry.x = ctx->width - right;
}
/* save left value */
int fake_left = left;
/* compute width of flex aligned widgets that does not support it */
int flex = 0;
for(int i = 0; i < widgets->len; i++)
if(widgets->tab[i].widget->align == AlignFlex
&& widgets->tab[i].widget->isvisible)
{
if(widgets->tab[i].widget->align_supported & AlignFlex)
flex++;
else
fake_left += widgets->tab[i].widget->geometry(widgets->tab[i].widget,
screen, ctx->height,
ctx->width - (fake_left + right)).width;
}
/* now compute everybody together! */
int flex_rendered = 0;
for(int i = 0; i < widgets->len; i++)
if(widgets->tab[i].widget->align == AlignFlex
&& widgets->tab[i].widget->isvisible)
{
if(widgets->tab[i].widget->align_supported & AlignFlex)
{
int width = (ctx->width - (right + fake_left)) / flex;
/* give last pixels to last flex to be rendered */
if(flex_rendered == flex - 1)
width += (ctx->width - (right + fake_left)) % flex;
widgets->tab[i].geometry = widgets->tab[i].widget->geometry(widgets->tab[i].widget,
screen, ctx->height,
width);
flex_rendered++;
}
else
widgets->tab[i].geometry = widgets->tab[i].widget->geometry(widgets->tab[i].widget,
screen, ctx->height,
ctx->width - (left + right));
widgets->tab[i].geometry.x = left;
left += widgets->tab[i].geometry.width;
}
/* draw everything! */
draw_rectangle(ctx, rectangle, 1.0, true, &ctx->bg);
for(int i = 0; i < widgets->len; i++)
if(widgets->tab[i].widget->isvisible)
{
widgets->tab[i].geometry.y = 0;
widgets->tab[i].widget->draw(widgets->tab[i].widget,
ctx, widgets->tab[i].geometry,
screen, wibox);
}
switch(orientation)
{
case South:
draw_rotate(ctx, ctx->pixmap, rotate_px,
ctx->width, ctx->height,
ctx->height, ctx->width,
M_PI_2, ctx->height, 0);
break;
case North:
draw_rotate(ctx, ctx->pixmap, rotate_px,
ctx->width, ctx->height,
ctx->height, ctx->width,
- M_PI_2, 0, ctx->width);
break;
case East:
break;
}
}
/** Common function for creating a widget.
* \param widget The allocated widget.
*/
void
widget_common_new(widget_t *widget)
{
widget->button = widget_common_button;
widget->align_supported = AlignLeft | AlignRight;
}
/** Invalidate widgets which should be refresh upon
* external modifications. widget_t who watch flags will
* be set to be refreshed.
* \param screen Virtual screen number.
* \param flags Cache flags to invalidate.
*/
void
widget_invalidate_cache(int screen, int flags)
{
for(int i = 0; i < globalconf.screens[screen].wiboxes.len; i++)
{
wibox_t *wibox = globalconf.screens[screen].wiboxes.tab[i];
for(int j = 0; j < wibox->widgets.len; j++)
if(wibox->widgets.tab[j].widget->cache_flags & flags)
{
wibox->need_update = true;
break;
}
}
}
/** Set a wibox needs update because it has widget, or redraw a titlebar.
* \todo Probably needs more optimization.
* \param widget The widget to look for.
*/
void
widget_invalidate_bywidget(widget_t *widget)
{
for(int screen = 0; screen < globalconf.nscreen; screen++)
for(int i = 0; i < globalconf.screens[screen].wiboxes.len; i++)
{
wibox_t *wibox = globalconf.screens[screen].wiboxes.tab[i];
if(!wibox->need_update)
for(int j = 0; j < wibox->widgets.len; j++)
if(wibox->widgets.tab[j].widget == widget)
{
wibox->need_update = true;
break;
}
}
for(client_t *c = globalconf.clients; c; c = c->next)
if(c->titlebar && !c->titlebar->need_update)
for(int j = 0; j < c->titlebar->widgets.len; j++)
if(c->titlebar->widgets.tab[j].widget == widget)
{
c->titlebar->need_update = true;
break;
}
}
/** Create a new widget.
* \param L The Lua VM state.
*
* \luastack
* \lparam A table with at least a name and a type value. Optional attributes
* are: align.
* \lreturn A brand new widget.
*/
static int
luaA_widget_new(lua_State *L)
{
const char *buf, *type;
widget_t *w = NULL;
widget_constructor_t *wc;
alignment_t align;
size_t len;
luaA_checktable(L, 2);
buf = luaA_getopt_lstring(L, 2, "align", "left", &len);
align = draw_align_fromstr(buf, len);
if(!(buf = luaA_getopt_string(L, 2, "name", NULL)))
luaL_error(L, "object widget must have a name");
type = luaA_getopt_string(L, 2, "type", NULL);
if((wc = name_func_lookup(type, WidgetList)))
w = wc(align);
else
luaL_error(L, "unkown widget type: %s", type);
w->type = wc;
/* Set visible by default. */
w->isvisible = true;
w->mouse_enter = w->mouse_leave = LUA_REFNIL;
w->name = a_strdup(buf);
return luaA_widget_userdata_new(L, w);
}
/** Get or set mouse buttons bindings to a widget.
* \param L The Lua VM state.
*
* \luastack
* \lvalue A widget.
* \lparam An array of mouse button bindings objects, or nothing.
* \return The array of mouse button bindings objects of this widget.
*/
static int
luaA_widget_buttons(lua_State *L)
{
widget_t **widget = luaA_checkudata(L, 1, "widget");
button_array_t *buttons = &(*widget)->buttons;
if(lua_gettop(L) == 2)
luaA_button_array_set(L, 2, buttons);
return luaA_button_array_get(L, buttons);
}
/** Convert a widget into a printable string.
* \param L The Lua VM state.
*
* \luastack
* \lvalue A widget.
*/
static int
luaA_widget_tostring(lua_State *L)
{
widget_t **p = luaA_checkudata(L, 1, "widget");
lua_pushfstring(L, "[widget udata(%p) name(%s)]", *p, (*p)->name);
return 1;
}
/** Generic widget.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
* \luastack
* \lfield visible The widget visibility.
* \lfield name The widget name.
* \lfield mouse_enter A function to execute when the mouse enter the widget.
* \lfield mouse_leave A function to execute when the mouse leave the widget.
*/
static int
luaA_widget_index(lua_State *L)
{
size_t len;
widget_t **widget = luaA_checkudata(L, 1, "widget");
const char *buf = luaL_checklstring(L, 2, &len);
awesome_token_t token;
if(luaA_usemetatable(L, 1, 2))
return 1;
switch((token = a_tokenize(buf, len)))
{
case A_TK_VISIBLE:
lua_pushboolean(L, (*widget)->isvisible);
return 1;
case A_TK_NAME:
lua_pushstring(L, (*widget)->name);
return 1;
case A_TK_MOUSE_ENTER:
if((*widget)->mouse_enter != LUA_REFNIL)
lua_rawgeti(L, LUA_REGISTRYINDEX, (*widget)->mouse_enter);
else
return 0;
return 1;
case A_TK_MOUSE_LEAVE:
if((*widget)->mouse_leave != LUA_REFNIL)
lua_rawgeti(L, LUA_REGISTRYINDEX, (*widget)->mouse_leave);
else
return 0;
return 1;
default:
break;
}
return (*widget)->index ? (*widget)->index(L, token) : 0;
}
/** Generic widget newindex.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
*/
static int
luaA_widget_newindex(lua_State *L)
{
size_t len;
widget_t **widget = luaA_checkudata(L, 1, "widget");
const char *buf = luaL_checklstring(L, 2, &len);
awesome_token_t token;
switch((token = a_tokenize(buf, len)))
{
case A_TK_VISIBLE:
(*widget)->isvisible = luaA_checkboolean(L, 3);
break;
case A_TK_MOUSE_ENTER:
luaA_registerfct(L, 3, &(*widget)->mouse_enter);
break;
case A_TK_MOUSE_LEAVE:
luaA_registerfct(L, 3, &(*widget)->mouse_leave);
break;
default:
return (*widget)->newindex ? (*widget)->newindex(L, token) : 0;
}
widget_invalidate_bywidget(*widget);
return 0;
}
const struct luaL_reg awesome_widget_methods[] =
{
{ "__call", luaA_widget_new },
{ NULL, NULL }
};
const struct luaL_reg awesome_widget_meta[] =
{
{ "buttons", luaA_widget_buttons },
{ "__index", luaA_widget_index },
{ "__newindex", luaA_widget_newindex },
{ "__gc", luaA_widget_gc },
{ "__eq", luaA_widget_eq },
{ "__tostring", luaA_widget_tostring },
{ NULL, NULL }
};
// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80
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