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| -rw-r--r-- | layer.h | 163 |
1 files changed, 163 insertions, 0 deletions
@@ -0,0 +1,163 @@ +/* Copyright (c) 2008, 2009 + * Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de) + * Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de) + * Micah Cowan (micah@cowan.name) + * Sadrul Habib Chowdhury (sadrul@users.sourceforge.net) + * Copyright (c) 1993-2002, 2003, 2005, 2006, 2007 + * Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de) + * Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de) + * Copyright (c) 1987 Oliver Laumann + * + * 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 3, 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 (see the file COPYING); if not, see + * https://www.gnu.org/licenses/, or contact Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA + * + **************************************************************** + * $Id$ GNU + */ + +#ifndef SCREEN_LAYER_H +#define SCREEN_LAYER_H + +/* + * This is the overlay structure. It is used to create a seperate + * layer over the current windows. + */ + +struct mchar; /* forward declaration */ + +struct LayFuncs +{ + void (*lf_LayProcess) __P((char **, int *)); + void (*lf_LayAbort) __P((void)); + void (*lf_LayRedisplayLine) __P((int, int, int, int)); + void (*lf_LayClearLine) __P((int, int, int, int)); + int (*lf_LayRewrite) __P((int, int, int, struct mchar *, int)); + int (*lf_LayResize) __P((int, int)); + void (*lf_LayRestore) __P((void)); + void (*lf_LayFree) __P((void *)); /* Should only free any data kept in + flayer->l_data (but not flayer->l_data itself). */ +}; + +struct layer +{ + struct canvas *l_cvlist; /* list of canvases displaying layer */ + int l_width; + int l_height; + int l_x; /* cursor position */ + int l_y; + int l_encoding; + struct LayFuncs *l_layfn; + void *l_data; + + struct layer *l_next; /* layer stack, should be in data? */ + struct layer *l_bottom; /* bottom element of layer stack */ + int l_blocking; + int l_mode; /* non-zero == edit mode */ + + struct { + unsigned char buffer[3]; /* [0]: the button + [1]: x + [2]: y + */ + int len; + int start; + } l_mouseevent; + + struct { + int d : 1; /* Is the output for the layer blocked? */ + + /* After unpausing, what region should we refresh? */ + int *left, *right; + int top, bottom; + int lines; + } l_pause; +}; + +#define LayProcess (*flayer->l_layfn->lf_LayProcess) +#define LayAbort (*flayer->l_layfn->lf_LayAbort) +#define LayRedisplayLine (*flayer->l_layfn->lf_LayRedisplayLine) +#define LayClearLine (*flayer->l_layfn->lf_LayClearLine) +#define LayRewrite (*flayer->l_layfn->lf_LayRewrite) +#define LayResize (*flayer->l_layfn->lf_LayResize) +#define LayRestore (*flayer->l_layfn->lf_LayRestore) +#define LayFree (*flayer->l_layfn->lf_LayFree) + +#define LaySetCursor() LGotoPos(flayer, flayer->l_x, flayer->l_y) +#define LayCanResize(l) (l->l_layfn->LayResize != DefResize) + +/* XXX: AArgh! think again! */ + +#define LAY_CALL_UP(fn) do \ + { \ + struct layer *oldlay = flayer; \ + struct canvas *oldcvlist, *cv; \ + debug("LayCallUp\n"); \ + flayer = flayer->l_next; \ + oldcvlist = flayer->l_cvlist; \ + debug1("oldcvlist: %lx\n", (long)oldcvlist); \ + flayer->l_cvlist = oldlay->l_cvlist; \ + for (cv = flayer->l_cvlist; cv; cv = cv->c_lnext) \ + cv->c_layer = flayer; \ + fn; \ + flayer = oldlay; \ + for (cv = flayer->l_cvlist; cv; cv = cv->c_lnext) \ + cv->c_layer = flayer; \ + flayer->l_next->l_cvlist = oldcvlist; \ + } while(0) + +#define LAY_DISPLAYS(l, fn) do \ + { \ + struct display *olddisplay = display; \ + struct canvas *cv; \ + for (display = displays; display; display = display->d_next) \ + { \ + for (cv = D_cvlist; cv; cv = cv->c_next) \ + if (cv->c_layer == l) \ + break; \ + if (cv == 0) \ + continue; \ + fn; \ + } \ + display = olddisplay; \ + } while(0) + +#endif /* SCREEN_LAYER_H */ + +/** + * (Un)Pauses a layer. + * + * @param layer The layer that should be (un)paused. + * @param pause Should we pause the layer? + */ +void LayPause __P((struct layer *layer, int pause)); + +/** + * Update the region to refresh after a layer is unpaused. + * + * @param layer The layer. + * @param xs The left-end of the region. + * @param xe The right-end of the region. + * @param ys The top-end of the region. + * @param ye The bottom-end of the region. + */ +void LayPauseUpdateRegion __P((struct layer *layer, int xs, int xe, int ys, int ye)); + +/** + * Free any internal memory for the layer. + * + * @param layer The layer. + */ +void LayerCleanupMemory __P((struct layer *layer)); + |