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awesome/objects/drawin.c

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/*
* drawin.c - drawin functions
*
* Copyright © 2008-2009 Julien Danjou <julien@danjou.info>
* Copyright © 2010 Uli Schlachter <psychon@znc.in>
*
* 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 "screen.h"
#include "drawin.h"
#include "objects/client.h"
#include "screen.h"
#include "xwindow.h"
#include "luaa.h"
#include "ewmh.h"
#include "systray.h"
#include "common/xcursor.h"
#include "common/xutil.h"
#include <cairo-xcb.h>
LUA_OBJECT_FUNCS(drawin_class, drawin_t, drawin)
/** Kick out systray windows.
*/
static void
drawin_systray_kickout(drawin_t *w)
{
if(globalconf.systray.parent == w)
{
/* Who! Check that we're not deleting a drawin with a systray, because it
* may be its parent. If so, we reparent to root before, otherwise it will
* hurt very much. */
systray_cleanup();
xcb_reparent_window(globalconf.connection,
globalconf.systray.window,
globalconf.screen->root,
-512, -512);
globalconf.systray.parent = NULL;
}
}
static void
drawin_wipe(drawin_t *w)
{
/* The drawin must already be unmapped, else it
* couldn't be garbage collected -> no unmap needed */
p_delete(&w->cursor);
if(w->surface)
{
/* Make sure that cairo knows that this surface can't be unused anymore.
* This is needed since lua could still have a reference to it. */
cairo_surface_finish(w->surface);
cairo_surface_destroy(w->surface);
w->surface = NULL;
}
if(w->window)
{
/* Activate BMA */
client_ignore_enterleave_events();
/* Make sure we don't accidentally kill the systray window */
drawin_systray_kickout(w);
xcb_destroy_window(globalconf.connection, w->window);
/* Deactivate BMA */
client_restore_enterleave_events();
w->window = XCB_NONE;
}
if(w->pixmap)
{
xcb_free_pixmap(globalconf.connection, w->pixmap);
w->pixmap = XCB_NONE;
}
}
void
drawin_unref_simplified(drawin_t **item)
{
luaA_object_unref(globalconf.L, *item);
}
static void
drawin_update_drawing(drawin_t *w)
{
/* If this drawin isn't visible, we don't need an up-to-date cairo surface
* for it. (drawin_map() will later make sure we are called again) */
if(!w->visible)
return;
/* Clean up old stuff */
if(w->surface)
{
/* In case lua still got a reference to the surface, it still won't be
* able to do anything with it because we finish it. */
cairo_surface_finish(w->surface);
cairo_surface_destroy(w->surface);
}
if(w->pixmap)
xcb_free_pixmap(globalconf.connection, w->pixmap);
/* Create a pixmap */
xcb_screen_t *s = globalconf.screen;
w->pixmap = xcb_generate_id(globalconf.connection);
xcb_create_pixmap(globalconf.connection, globalconf.default_depth, w->pixmap, s->root,
w->geometry.width, w->geometry.height);
/* and create a surface for that pixmap */
w->surface = cairo_xcb_surface_create(globalconf.connection,
w->pixmap, globalconf.visual,
w->geometry.width, w->geometry.height);
/* Make sure the pixmap doesn't contain garbage by filling it with black */
cairo_t *cr = cairo_create(w->surface);
cairo_set_operator(cr, CAIRO_OPERATOR_CLEAR);
cairo_paint(cr);
cairo_destroy(cr);
}
/** Initialize a drawin.
* \param w The drawin to initialize.
*/
static void
drawin_init(drawin_t *w)
{
xcb_screen_t *s = globalconf.screen;
w->window = xcb_generate_id(globalconf.connection);
xcb_create_window(globalconf.connection, globalconf.default_depth, w->window, s->root,
w->geometry.x, w->geometry.y,
w->geometry.width, w->geometry.height,
w->border_width, XCB_COPY_FROM_PARENT, globalconf.visual->visual_id,
XCB_CW_BORDER_PIXEL | XCB_CW_BIT_GRAVITY
| XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK | XCB_CW_COLORMAP
| XCB_CW_CURSOR,
(const uint32_t [])
{
w->border_color.pixel,
XCB_GRAVITY_NORTH_WEST,
1,
XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT
| XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY | XCB_EVENT_MASK_ENTER_WINDOW
| XCB_EVENT_MASK_LEAVE_WINDOW | XCB_EVENT_MASK_STRUCTURE_NOTIFY
| XCB_EVENT_MASK_POINTER_MOTION | XCB_EVENT_MASK_EXPOSURE
| XCB_EVENT_MASK_PROPERTY_CHANGE,
globalconf.default_cmap,
xcursor_new(globalconf.connection, xcursor_font_fromstr(w->cursor))
});
/* Set the right properties */
ewmh_update_window_type(w->window, window_translate_type(w->type));
ewmh_update_strut(w->window, &w->strut);
}
/** Refresh the window content by copying its pixmap data to its window.
* \param w The drawin to refresh.
*/
static inline void
drawin_refresh_pixmap(drawin_t *w)
{
drawin_refresh_pixmap_partial(w, 0, 0, w->geometry.width, w->geometry.height);
}
/** Move and/or resize a drawin
* \param L The Lua VM state.
* \param udx The index of the drawin.
* \param geometry The new geometry.
*/
static void
drawin_moveresize(lua_State *L, int udx, area_t geometry)
{
drawin_t *w = luaA_checkudata(L, udx, &drawin_class);
int number_of_vals = 0;
uint32_t moveresize_win_vals[4], mask_vals = 0;
if(w->geometry.x != geometry.x)
{
w->geometry.x = moveresize_win_vals[number_of_vals++] = geometry.x;
mask_vals |= XCB_CONFIG_WINDOW_X;
}
if(w->geometry.y != geometry.y)
{
w->geometry.y = moveresize_win_vals[number_of_vals++] = geometry.y;
mask_vals |= XCB_CONFIG_WINDOW_Y;
}
if(geometry.width > 0 && w->geometry.width != geometry.width)
{
w->geometry.width = moveresize_win_vals[number_of_vals++] = geometry.width;
mask_vals |= XCB_CONFIG_WINDOW_WIDTH;
}
if(geometry.height > 0 && w->geometry.height != geometry.height)
{
w->geometry.height = moveresize_win_vals[number_of_vals++] = geometry.height;
mask_vals |= XCB_CONFIG_WINDOW_HEIGHT;
}
if(mask_vals & (XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT))
drawin_update_drawing(w);
/* Activate BMA */
client_ignore_enterleave_events();
if(mask_vals)
xcb_configure_window(globalconf.connection, w->window, mask_vals, moveresize_win_vals);
/* Deactivate BMA */
client_restore_enterleave_events();
if(mask_vals & XCB_CONFIG_WINDOW_X)
luaA_object_emit_signal(L, udx, "property::x", 0);
if(mask_vals & XCB_CONFIG_WINDOW_Y)
luaA_object_emit_signal(L, udx, "property::y", 0);
if(mask_vals & XCB_CONFIG_WINDOW_WIDTH)
luaA_object_emit_signal(L, udx, "property::width", 0);
if(mask_vals & XCB_CONFIG_WINDOW_HEIGHT)
luaA_object_emit_signal(L, udx, "property::height", 0);
}
/** Refresh the window content by copying its pixmap data to its window.
* \param drawin The drawin to refresh.
* \param x The copy starting point x component.
* \param y The copy starting point y component.
* \param w The copy width from the x component.
* \param h The copy height from the y component.
*/
void
drawin_refresh_pixmap_partial(drawin_t *drawin,
int16_t x, int16_t y,
uint16_t w, uint16_t h)
{
/* Make cairo do all pending drawing */
cairo_surface_flush(drawin->surface);
xcb_copy_area(globalconf.connection, drawin->pixmap,
drawin->window, globalconf.gc, x, y, x, y,
w, h);
}
static void
drawin_map(drawin_t *drawin)
{
/* Activate BMA */
client_ignore_enterleave_events();
/* Map the drawin */
xcb_map_window(globalconf.connection, drawin->window);
drawin_update_drawing(drawin);
/* Deactivate BMA */
client_restore_enterleave_events();
/* Stack this drawin correctly */
stack_windows();
/* Add it to the list of visible drawins */
drawin_array_append(&globalconf.drawins, drawin);
}
static void
drawin_unmap(drawin_t *drawin)
{
xcb_unmap_window(globalconf.connection, drawin->window);
foreach(item, globalconf.drawins)
if(*item == drawin)
{
drawin_array_remove(&globalconf.drawins, item);
break;
}
}
/** Get a drawin by its window.
* \param win The window id.
* \return A drawin if found, NULL otherwise.
*/
drawin_t *
drawin_getbywin(xcb_window_t win)
{
foreach(w, globalconf.drawins)
if((*w)->window == win)
return *w;
return NULL;
}
/** Set a drawin visible or not.
* \param L The Lua VM state.
* \param udx The drawin.
* \param v The visible value.
*/
static void
drawin_set_visible(lua_State *L, int udx, bool v)
{
drawin_t *drawin = luaA_checkudata(L, udx, &drawin_class);
if(v != drawin->visible)
{
drawin->visible = v;
if(drawin->visible)
{
drawin_map(drawin);
/* duplicate drawin */
lua_pushvalue(L, udx);
/* ref it */
luaA_object_ref_class(globalconf.L, -1, &drawin_class);
}
else
{
/* Active BMA */
client_ignore_enterleave_events();
/* Unmap window */
drawin_unmap(drawin);
/* Active BMA */
client_restore_enterleave_events();
/* unref it */
luaA_object_unref(globalconf.L, drawin);
}
luaA_object_emit_signal(L, udx, "property::visible", 0);
if(strut_has_value(&drawin->strut))
{
screen_t *screen =
screen_getbycoord(drawin->geometry.x, drawin->geometry.y);
screen_emit_signal(globalconf.L, screen, "property::workarea", 0);
}
}
}
static drawin_t *
drawin_allocator(lua_State *L)
{
drawin_t *w = drawin_new(L);
w->visible = false;
w->opacity = -1;
w->cursor = a_strdup("left_ptr");
w->geometry.width = 1;
w->geometry.height = 1;
w->type = _NET_WM_WINDOW_TYPE_NORMAL;
drawin_init(w);
return w;
}
/** Create a new drawin.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
*/
static int
luaA_drawin_new(lua_State *L)
{
luaA_class_new(L, &drawin_class);
return 1;
}
/* Set or get the drawin geometry.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
* \luastack
* \lparam An optional table with drawin geometry.
* \lreturn The drawin geometry.
*/
static int
luaA_drawin_geometry(lua_State *L)
{
drawin_t *drawin = luaA_checkudata(L, 1, &drawin_class);
if(lua_gettop(L) == 2)
{
area_t wingeom;
luaA_checktable(L, 2);
wingeom.x = luaA_getopt_number(L, 2, "x", drawin->geometry.x);
wingeom.y = luaA_getopt_number(L, 2, "y", drawin->geometry.y);
wingeom.width = luaA_getopt_number(L, 2, "width", drawin->geometry.width);
wingeom.height = luaA_getopt_number(L, 2, "height", drawin->geometry.height);
if(wingeom.width > 0 && wingeom.height > 0)
drawin_moveresize(L, 1, wingeom);
}
return luaA_pusharea(L, drawin->geometry);
}
LUA_OBJECT_EXPORT_PROPERTY(drawin, drawin_t, ontop, lua_pushboolean)
LUA_OBJECT_EXPORT_PROPERTY(drawin, drawin_t, cursor, lua_pushstring)
LUA_OBJECT_EXPORT_PROPERTY(drawin, drawin_t, visible, lua_pushboolean)
static int
luaA_drawin_set_x(lua_State *L, drawin_t *drawin)
{
drawin_moveresize(L, -3, (area_t) { .x = luaL_checknumber(L, -1),
.y = drawin->geometry.y,
.width = drawin->geometry.width,
.height = drawin->geometry.height });
return 0;
}
static int
luaA_drawin_get_x(lua_State *L, drawin_t *drawin)
{
lua_pushnumber(L, drawin->geometry.x);
return 1;
}
static int
luaA_drawin_set_y(lua_State *L, drawin_t *drawin)
{
drawin_moveresize(L, -3, (area_t) { .x = drawin->geometry.x,
.y = luaL_checknumber(L, -1),
.width = drawin->geometry.width,
.height = drawin->geometry.height });
return 0;
}
static int
luaA_drawin_get_y(lua_State *L, drawin_t *drawin)
{
lua_pushnumber(L, drawin->geometry.y);
return 1;
}
static int
luaA_drawin_set_width(lua_State *L, drawin_t *drawin)
{
int width = luaL_checknumber(L, -1);
if(width <= 0)
luaL_error(L, "invalid width");
drawin_moveresize(L, -3, (area_t) { .x = drawin->geometry.x,
.y = drawin->geometry.y,
.width = width,
.height = drawin->geometry.height });
return 0;
}
static int
luaA_drawin_get_width(lua_State *L, drawin_t *drawin)
{
lua_pushnumber(L, drawin->geometry.width);
return 1;
}
static int
luaA_drawin_set_height(lua_State *L, drawin_t *drawin)
{
int height = luaL_checknumber(L, -1);
if(height <= 0)
luaL_error(L, "invalid height");
drawin_moveresize(L, -3, (area_t) { .x = drawin->geometry.x,
.y = drawin->geometry.y,
.width = drawin->geometry.width,
.height = height });
return 0;
}
static int
luaA_drawin_get_height(lua_State *L, drawin_t *drawin)
{
lua_pushnumber(L, drawin->geometry.height);
return 1;
}
/** Set the drawin on top status.
* \param L The Lua VM state.
* \param drawin The drawin object.
* \return The number of elements pushed on stack.
*/
static int
luaA_drawin_set_ontop(lua_State *L, drawin_t *drawin)
{
bool b = luaA_checkboolean(L, -1);
if(b != drawin->ontop)
{
drawin->ontop = b;
stack_windows();
luaA_object_emit_signal(L, -3, "property::ontop", 0);
}
return 0;
}
/** Set the drawin cursor.
* \param L The Lua VM state.
* \param drawin The drawin object.
* \return The number of elements pushed on stack.
*/
static int
luaA_drawin_set_cursor(lua_State *L, drawin_t *drawin)
{
const char *buf = luaL_checkstring(L, -1);
if(buf)
{
uint16_t cursor_font = xcursor_font_fromstr(buf);
if(cursor_font)
{
xcb_cursor_t cursor = xcursor_new(globalconf.connection, cursor_font);
p_delete(&drawin->cursor);
drawin->cursor = a_strdup(buf);
xwindow_set_cursor(drawin->window, cursor);
luaA_object_emit_signal(L, -3, "property::cursor", 0);
}
}
return 0;
}
/** Set the drawin visibility.
* \param L The Lua VM state.
* \param drawin The drawin object.
* \return The number of elements pushed on stack.
*/
static int
luaA_drawin_set_visible(lua_State *L, drawin_t *drawin)
{
drawin_set_visible(L, -3, luaA_checkboolean(L, -1));
return 0;
}
/** Get a drawin's surface
* \param L The Lua VM state.
* \param drawin The drawin object.
* \return The number of elements pushed on stack.
*/
static int
luaA_drawin_get_surface(lua_State *L, drawin_t *drawin)
{
/* Lua gets its own reference which it will have to destroy */
lua_pushlightuserdata(L, cairo_surface_reference(drawin->surface));
return 1;
}
/** Refresh a drawin's content. This has to be called whenever some drawing to
* the drawin's surface has been done and should become visible.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
*/
static int
luaA_drawin_refresh(lua_State *L)
{
drawin_t *drawin = luaA_checkudata(L, 1, &drawin_class);
drawin_refresh_pixmap(drawin);
return 0;
}
void
drawin_class_setup(lua_State *L)
{
static const struct luaL_Reg drawin_methods[] =
{
LUA_CLASS_METHODS(drawin)
{ "__call", luaA_drawin_new },
{ NULL, NULL }
};
static const struct luaL_Reg drawin_meta[] =
{
LUA_OBJECT_META(drawin)
LUA_CLASS_META
{ "geometry", luaA_drawin_geometry },
{ "refresh", luaA_drawin_refresh },
{ NULL, NULL },
};
luaA_class_setup(L, &drawin_class, "drawin", &window_class,
(lua_class_allocator_t) drawin_allocator,
(lua_class_collector_t) drawin_wipe,
NULL,
luaA_class_index_miss_property, luaA_class_newindex_miss_property,
drawin_methods, drawin_meta);
luaA_class_add_property(&drawin_class, "surface",
NULL,
(lua_class_propfunc_t) luaA_drawin_get_surface,
NULL);
luaA_class_add_property(&drawin_class, "visible",
(lua_class_propfunc_t) luaA_drawin_set_visible,
(lua_class_propfunc_t) luaA_drawin_get_visible,
(lua_class_propfunc_t) luaA_drawin_set_visible);
luaA_class_add_property(&drawin_class, "ontop",
(lua_class_propfunc_t) luaA_drawin_set_ontop,
(lua_class_propfunc_t) luaA_drawin_get_ontop,
(lua_class_propfunc_t) luaA_drawin_set_ontop);
luaA_class_add_property(&drawin_class, "cursor",
(lua_class_propfunc_t) luaA_drawin_set_cursor,
(lua_class_propfunc_t) luaA_drawin_get_cursor,
(lua_class_propfunc_t) luaA_drawin_set_cursor);
luaA_class_add_property(&drawin_class, "x",
(lua_class_propfunc_t) luaA_drawin_set_x,
(lua_class_propfunc_t) luaA_drawin_get_x,
(lua_class_propfunc_t) luaA_drawin_set_x);
luaA_class_add_property(&drawin_class, "y",
(lua_class_propfunc_t) luaA_drawin_set_y,
(lua_class_propfunc_t) luaA_drawin_get_y,
(lua_class_propfunc_t) luaA_drawin_set_y);
luaA_class_add_property(&drawin_class, "width",
(lua_class_propfunc_t) luaA_drawin_set_width,
(lua_class_propfunc_t) luaA_drawin_get_width,
(lua_class_propfunc_t) luaA_drawin_set_width);
luaA_class_add_property(&drawin_class, "height",
(lua_class_propfunc_t) luaA_drawin_set_height,
(lua_class_propfunc_t) luaA_drawin_get_height,
(lua_class_propfunc_t) luaA_drawin_set_height);
luaA_class_add_property(&drawin_class, "type",
(lua_class_propfunc_t) luaA_window_set_type,
(lua_class_propfunc_t) luaA_window_get_type,
(lua_class_propfunc_t) luaA_window_set_type);
signal_add(&drawin_class.signals, "mouse::enter");
signal_add(&drawin_class.signals, "mouse::leave");
signal_add(&drawin_class.signals, "property::border_width");
signal_add(&drawin_class.signals, "property::cursor");
signal_add(&drawin_class.signals, "property::height");
signal_add(&drawin_class.signals, "property::ontop");
signal_add(&drawin_class.signals, "property::visible");
signal_add(&drawin_class.signals, "property::widgets");
signal_add(&drawin_class.signals, "property::width");
signal_add(&drawin_class.signals, "property::x");
signal_add(&drawin_class.signals, "property::y");
}
// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80
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