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rgwindow.c
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/* rgwindow.c: Window objects
for RemGlk, remote-procedure-call implementation of the Glk API.
Designed by Andrew Plotkin <[email protected]>
http://eblong.com/zarf/glk/
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <math.h>
#include "glk.h"
#include "remglk.h"
#include "gi_blorb.h"
#include "rgdata.h"
#include "rgwin_pair.h"
#include "rgwin_blank.h"
#include "rgwin_grid.h"
#include "rgwin_buf.h"
#include "rgwin_graph.h"
/* The update generation number. */
static glui32 generation = 0;
/* Used to generate window updatetag values. */
static glui32 tagcounter = 0;
/* Linked list of all windows */
static window_t *gli_windowlist = NULL;
/* For use by gli_print_spaces() */
#define NUMSPACES (16)
static char spacebuffer[NUMSPACES+1];
window_t *gli_rootwin = NULL; /* The topmost window. */
/* The current screen metrics. */
static data_metrics_t metrics;
/* Flag: Has the window arrangement changed at all? */
static int geometry_changed;
void (*gli_interrupt_handler)(void) = NULL;
static void compute_content_box(grect_t *box);
/* Set up the window system. This is called from main(). */
void gli_initialize_windows()
{
int ix;
generation = 0;
srandom(time(NULL));
tagcounter = (random() % 15) + 16;
gli_rootwin = NULL;
/* Build a convenient array of spaces. */
for (ix=0; ix<NUMSPACES; ix++)
spacebuffer[ix] = ' ';
spacebuffer[NUMSPACES] = '\0';
memset(&metrics, 0, sizeof(metrics));
geometry_changed = TRUE;
}
/* Get out fast. This is used by the ctrl-C interrupt handler, under Unix.
Also singleturn mode, after processing the single input.
It doesn't pause and wait for a keypress, and it calls the Glk interrupt
handler. Otherwise it's the same as glk_exit(). */
void gli_fast_exit()
{
if (gli_interrupt_handler) {
(*gli_interrupt_handler)();
}
gli_streams_close_all();
exit(0);
}
static void compute_content_box(grect_t *box)
{
box->left = (int) ceil(metrics.outspacingx);
box->top = (int) ceil(metrics.outspacingy);
box->right = (int) floor(metrics.width - metrics.outspacingx);
box->bottom = (int) floor(metrics.height - metrics.outspacingy);
}
glui32 gli_window_current_generation()
{
return generation;
}
window_t *glkunix_window_find_by_updatetag(glui32 tag)
{
window_t *win;
for (win=gli_windowlist; win; win=win->next) {
if (win->updatetag == tag)
return win;
}
return NULL;
}
void glkunix_window_set_dispatch_rock(winid_t win, gidispatch_rock_t rock)
{
win->disprock = rock;
}
glui32 glkunix_window_get_updatetag(winid_t win)
{
return win->updatetag;
}
window_t *gli_new_window(glui32 type, glui32 rock)
{
window_t *win = (window_t *)malloc(sizeof(window_t));
if (!win)
return NULL;
win->magicnum = MAGIC_WINDOW_NUM;
win->rock = rock;
win->type = type;
win->updatetag = tagcounter;
tagcounter += 3;
win->parent = NULL; /* for now */
win->data = NULL; /* for now */
data_grect_clear(&win->bbox);
win->inputgen = 0;
win->char_request = FALSE;
win->line_request = FALSE;
win->line_request_uni = FALSE;
win->char_request_uni = FALSE;
win->hyperlink_request = FALSE;
win->mouse_request = FALSE;
win->echo_line_input = TRUE;
win->terminate_line_input = 0;
win->style = style_Normal;
win->hyperlink = 0;
win->str = gli_stream_open_window(win);
win->echostr = NULL;
win->tempbufinfo = NULL;
win->prev = NULL;
win->next = gli_windowlist;
gli_windowlist = win;
if (win->next) {
win->next->prev = win;
}
if (gli_register_obj)
win->disprock = (*gli_register_obj)(win, gidisp_Class_Window);
return win;
}
window_t *gli_window_alloc_inactive()
{
window_t *win = (window_t *)malloc(sizeof(window_t));
if (!win)
return NULL;
win->magicnum = MAGIC_WINDOW_NUM;
win->rock = 0;
win->type = 0;
win->updatetag = 0;
win->parent = NULL;
win->data = NULL;
data_grect_clear(&win->bbox);
win->inputgen = 0;
win->char_request = FALSE;
win->line_request = FALSE;
win->line_request_uni = FALSE;
win->char_request_uni = FALSE;
win->hyperlink_request = FALSE;
win->mouse_request = FALSE;
win->echo_line_input = TRUE;
win->terminate_line_input = 0;
win->style = style_Normal;
win->hyperlink = 0;
win->str = NULL;
win->echostr = NULL;
win->tempbufinfo = NULL;
win->prev = NULL;
win->next = NULL;
return win;
}
void gli_window_dealloc_inactive(window_t *win)
{
switch (win->type) {
case wintype_Blank: {
window_blank_t *dwin = win->data;
if (dwin)
win_blank_destroy(dwin);
}
break;
case wintype_Pair: {
window_pair_t *dwin = win->data;
/* note that dwin->inbuf is still null, so there will be no unregister step */
if (dwin)
win_pair_destroy(dwin);
}
break;
case wintype_TextBuffer: {
window_textbuffer_t *dwin = win->data;
if (dwin)
win_textbuffer_destroy(dwin);
}
break;
case wintype_TextGrid: {
window_textgrid_t *dwin = win->data;
if (dwin)
win_textgrid_destroy(dwin);
}
break;
case wintype_Graphics: {
window_graphics_t *dwin = win->data;
if (dwin)
win_graphics_destroy(dwin);
}
break;
}
if (win->tempbufinfo) {
data_tempbufinfo_free(win->tempbufinfo);
win->tempbufinfo = NULL;
}
free(win);
}
void gli_delete_window(window_t *win)
{
window_t *prev, *next;
if (gli_unregister_obj)
(*gli_unregister_obj)(win, gidisp_Class_Window, win->disprock);
win->magicnum = 0;
win->echostr = NULL;
if (win->str) {
gli_delete_stream(win->str);
win->str = NULL;
}
if (win->tempbufinfo) {
data_tempbufinfo_free(win->tempbufinfo);
win->tempbufinfo = NULL;
}
prev = win->prev;
next = win->next;
win->prev = NULL;
win->next = NULL;
if (prev)
prev->next = next;
else
gli_windowlist = next;
if (next)
next->prev = prev;
free(win);
}
int gli_windows_update_from_state(window_t **list, int count, window_t *rootwin, glui32 gen)
{
if (gli_windowlist) {
gli_fatal_error("windows already exist");
return FALSE;
}
int ix;
for (ix=count-1; ix>=0; ix--) {
winid_t win = list[ix];
win->next = gli_windowlist;
gli_windowlist = win;
if (win->next) {
win->next->prev = win;
}
if (win->updatetag >= tagcounter)
tagcounter = win->updatetag + 3;
if (win->tempbufinfo) {
data_tempbufinfo_t *info = win->tempbufinfo;
win->tempbufinfo = NULL;
if (!gli_dispatch_restore_arr) {
data_tempbufinfo_free(info);
continue;
}
void *voidbuf = NULL;
switch (win->type) {
case wintype_TextBuffer: {
window_textbuffer_t *dwin = win->data;
if (!win->line_request_uni) {
dwin->inarrayrock = (*gli_dispatch_restore_arr)(info->bufkey, dwin->inmax, "&+#!Cn", &voidbuf);
if (voidbuf) {
dwin->inbuf = voidbuf;
memset(dwin->inbuf, 0, dwin->inmax);
if (info->bufdata) {
if (info->bufdatalen > dwin->inmax)
info->bufdatalen = dwin->inmax;
memcpy(dwin->inbuf, info->bufdata, info->bufdatalen);
}
}
}
else {
dwin->inarrayrock = (*gli_dispatch_restore_arr)(info->bufkey, dwin->inmax, "&+#!Iu", &voidbuf);
if (voidbuf) {
dwin->inbuf = voidbuf;
memset(dwin->inbuf, 0, sizeof(glui32)*dwin->inmax);
if (info->ubufdata) {
if (info->bufdatalen > dwin->inmax)
info->bufdatalen = dwin->inmax;
memcpy(dwin->inbuf, info->ubufdata, sizeof(glui32)*info->bufdatalen);
}
}
}
}
break;
case wintype_TextGrid: {
window_textgrid_t *dwin = win->data;
if (!win->line_request_uni) {
dwin->inarrayrock = (*gli_dispatch_restore_arr)(info->bufkey, dwin->inmax, "&+#!Cn", &voidbuf);
if (voidbuf) {
dwin->inbuf = voidbuf;
memset(dwin->inbuf, 0, dwin->inmax);
if (info->bufdata) {
if (info->bufdatalen > dwin->inmax)
info->bufdatalen = dwin->inmax;
memcpy(dwin->inbuf, info->bufdata, info->bufdatalen);
}
}
}
else {
dwin->inarrayrock = (*gli_dispatch_restore_arr)(info->bufkey, dwin->inmax, "&+#!Iu", &voidbuf);
if (voidbuf) {
dwin->inbuf = voidbuf;
memset(dwin->inbuf, 0, sizeof(glui32)*dwin->inmax);
if (info->ubufdata) {
if (info->bufdatalen > dwin->inmax)
info->bufdatalen = dwin->inmax;
memcpy(dwin->inbuf, info->ubufdata, sizeof(glui32)*info->bufdatalen);
}
}
}
}
break;
} /* end switch */
data_tempbufinfo_free(info);
}
}
gli_rootwin = rootwin;
generation = gen;
geometry_changed = FALSE;
return TRUE;
}
winid_t glk_window_open(winid_t splitwin, glui32 method, glui32 size,
glui32 wintype, glui32 rock)
{
window_t *newwin, *pairwin, *oldparent;
window_pair_t *dpairwin;
grect_t box;
glui32 val;
if (!gli_rootwin) {
if (splitwin) {
gli_strict_warning("window_open: ref must be NULL");
return 0;
}
/* ignore method and size now */
oldparent = NULL;
compute_content_box(&box);
}
else {
if (!splitwin) {
gli_strict_warning("window_open: ref must not be NULL");
return 0;
}
val = (method & winmethod_DivisionMask);
if (val != winmethod_Fixed && val != winmethod_Proportional) {
gli_strict_warning("window_open: invalid method (not fixed or proportional)");
return 0;
}
val = (method & winmethod_DirMask);
if (val != winmethod_Above && val != winmethod_Below
&& val != winmethod_Left && val != winmethod_Right) {
gli_strict_warning("window_open: invalid method (bad direction)");
return 0;
}
box = splitwin->bbox;
oldparent = splitwin->parent;
if (oldparent && oldparent->type != wintype_Pair) {
gli_strict_warning("window_open: parent window is not Pair");
return 0;
}
}
if (wintype == wintype_Graphics && !gli_supportcaps.graphicswin) {
/* Graphics windows not supported; silently return null */
return 0;
}
newwin = gli_new_window(wintype, rock);
if (!newwin) {
gli_strict_warning("window_open: unable to create window");
return 0;
}
switch (wintype) {
case wintype_Blank:
newwin->data = win_blank_create(newwin);
break;
case wintype_TextGrid:
newwin->data = win_textgrid_create(newwin);
break;
case wintype_TextBuffer:
newwin->data = win_textbuffer_create(newwin);
break;
case wintype_Graphics:
newwin->data = win_graphics_create(newwin);
break;
case wintype_Pair:
gli_strict_warning("window_open: cannot open pair window directly");
gli_delete_window(newwin);
return 0;
default:
/* Unknown window type -- do not print a warning, just return 0
to indicate that it's not possible. */
gli_delete_window(newwin);
return 0;
}
if (!newwin->data) {
gli_strict_warning("window_open: unable to create window");
return 0;
}
if (!splitwin) {
gli_rootwin = newwin;
gli_window_rearrange(newwin, &box, &metrics);
}
else {
/* create pairwin, with newwin as the key */
pairwin = gli_new_window(wintype_Pair, 0);
dpairwin = win_pair_create(pairwin, method, newwin, size);
pairwin->data = dpairwin;
dpairwin->child1 = splitwin;
dpairwin->child2 = newwin;
splitwin->parent = pairwin;
newwin->parent = pairwin;
pairwin->parent = oldparent;
if (oldparent) {
window_pair_t *dparentwin = oldparent->data;
if (dparentwin->child1 == splitwin)
dparentwin->child1 = pairwin;
else
dparentwin->child2 = pairwin;
}
else {
gli_rootwin = pairwin;
}
gli_window_rearrange(pairwin, &box, &metrics);
}
return newwin;
}
static void gli_window_close(window_t *win, int recurse)
{
window_t *wx;
for (wx=win->parent; wx; wx=wx->parent) {
if (wx->type == wintype_Pair) {
window_pair_t *dwx = wx->data;
if (dwx->key == win) {
dwx->key = NULL;
dwx->keydamage = TRUE;
}
}
}
switch (win->type) {
case wintype_Blank: {
window_blank_t *dwin = win->data;
win_blank_destroy(dwin);
}
break;
case wintype_Pair: {
window_pair_t *dwin = win->data;
if (recurse) {
if (dwin->child1)
gli_window_close(dwin->child1, TRUE);
if (dwin->child2)
gli_window_close(dwin->child2, TRUE);
}
win_pair_destroy(dwin);
}
break;
case wintype_TextBuffer: {
window_textbuffer_t *dwin = win->data;
win_textbuffer_destroy(dwin);
}
break;
case wintype_TextGrid: {
window_textgrid_t *dwin = win->data;
win_textgrid_destroy(dwin);
}
break;
case wintype_Graphics: {
window_graphics_t *dwin = win->data;
win_graphics_destroy(dwin);
}
break;
}
gli_delete_window(win);
}
void glk_window_close(window_t *win, stream_result_t *result)
{
if (!win) {
gli_strict_warning("window_close: invalid ref");
return;
}
if (win == gli_rootwin || win->parent == NULL) {
/* close the root window, which means all windows. */
gli_rootwin = 0;
/* begin (simpler) closation */
geometry_changed = TRUE;
gli_stream_fill_result(win->str, result);
gli_window_close(win, TRUE);
}
else {
/* have to jigger parent */
grect_t box;
window_t *pairwin, *sibwin, *grandparwin, *wx;
window_pair_t *dpairwin, *dgrandparwin;
int keydamage_flag;
pairwin = win->parent;
dpairwin = pairwin->data;
if (win == dpairwin->child1) {
sibwin = dpairwin->child2;
}
else if (win == dpairwin->child2) {
sibwin = dpairwin->child1;
}
else {
gli_strict_warning("window_close: window tree is corrupted");
return;
}
box = pairwin->bbox;
grandparwin = pairwin->parent;
if (!grandparwin) {
gli_rootwin = sibwin;
sibwin->parent = NULL;
}
else {
dgrandparwin = grandparwin->data;
if (dgrandparwin->child1 == pairwin)
dgrandparwin->child1 = sibwin;
else
dgrandparwin->child2 = sibwin;
sibwin->parent = grandparwin;
}
/* Begin closation */
gli_stream_fill_result(win->str, result);
/* Close the child window (and descendants), so that key-deletion can
crawl up the tree to the root window. */
gli_window_close(win, TRUE);
/* This probably isn't necessary, but the child *is* gone, so just
in case. */
if (win == dpairwin->child1) {
dpairwin->child1 = NULL;
}
else if (win == dpairwin->child2) {
dpairwin->child2 = NULL;
}
/* Now we can delete the parent pair. */
gli_window_close(pairwin, FALSE);
keydamage_flag = FALSE;
for (wx=sibwin; wx; wx=wx->parent) {
if (wx->type == wintype_Pair) {
window_pair_t *dwx = wx->data;
if (dwx->keydamage) {
keydamage_flag = TRUE;
dwx->keydamage = FALSE;
}
}
}
if (keydamage_flag) {
compute_content_box(&box);
gli_window_rearrange(gli_rootwin, &box, &metrics);
}
else {
gli_window_rearrange(sibwin, &box, &metrics);
}
}
}
void glk_window_get_arrangement(window_t *win, glui32 *method, glui32 *size,
winid_t *keywin)
{
window_pair_t *dwin;
glui32 val;
if (!win) {
gli_strict_warning("window_get_arrangement: invalid ref");
return;
}
if (win->type != wintype_Pair) {
gli_strict_warning("window_get_arrangement: not a Pair window");
return;
}
dwin = win->data;
val = dwin->dir | dwin->division;
if (!dwin->hasborder)
val |= winmethod_NoBorder;
if (size)
*size = dwin->size;
if (keywin) {
if (dwin->key)
*keywin = dwin->key;
else
*keywin = NULL;
}
if (method)
*method = val;
}
void glk_window_set_arrangement(window_t *win, glui32 method, glui32 size,
winid_t key)
{
window_pair_t *dwin;
glui32 newdir;
grect_t box;
int newvertical, newbackward;
if (!win) {
gli_strict_warning("window_set_arrangement: invalid ref");
return;
}
if (win->type != wintype_Pair) {
gli_strict_warning("window_set_arrangement: not a Pair window");
return;
}
if (key) {
window_t *wx;
if (key->type == wintype_Pair) {
gli_strict_warning("window_set_arrangement: keywin cannot be a Pair");
return;
}
for (wx=key; wx; wx=wx->parent) {
if (wx == win)
break;
}
if (wx == NULL) {
gli_strict_warning("window_set_arrangement: keywin must be a descendant");
return;
}
}
dwin = win->data;
box = win->bbox;
newdir = method & winmethod_DirMask;
newvertical = (newdir == winmethod_Left || newdir == winmethod_Right);
newbackward = (newdir == winmethod_Left || newdir == winmethod_Above);
if (!key)
key = dwin->key;
if ((newvertical && !dwin->vertical) || (!newvertical && dwin->vertical)) {
if (!dwin->vertical)
gli_strict_warning("window_set_arrangement: split must stay horizontal");
else
gli_strict_warning("window_set_arrangement: split must stay vertical");
return;
}
if (key && key->type == wintype_Blank
&& (method & winmethod_DivisionMask) == winmethod_Fixed) {
gli_strict_warning("window_set_arrangement: a Blank window cannot have a fixed size");
return;
}
if ((newbackward && !dwin->backward) || (!newbackward && dwin->backward)) {
/* switch the children */
window_t *tmpwin = dwin->child1;
dwin->child1 = dwin->child2;
dwin->child2 = tmpwin;
}
/* set up everything else */
dwin->dir = newdir;
dwin->division = method & winmethod_DivisionMask;
dwin->key = key;
dwin->size = size;
dwin->hasborder = ((method & winmethod_BorderMask) == winmethod_Border);
dwin->vertical = (dwin->dir == winmethod_Left || dwin->dir == winmethod_Right);
dwin->backward = (dwin->dir == winmethod_Left || dwin->dir == winmethod_Above);
gli_window_rearrange(win, &box, &metrics);
}
winid_t glk_window_iterate(winid_t win, glui32 *rock)
{
if (!win) {
win = gli_windowlist;
}
else {
win = win->next;
}
if (win) {
if (rock)
*rock = win->rock;
return win;
}
if (rock)
*rock = 0;
return NULL;
}
window_t *gli_window_iterate_treeorder(window_t *win)
{
if (!win)
return gli_rootwin;
if (win->type == wintype_Pair) {
window_pair_t *dwin = win->data;
if (!dwin->backward)
return dwin->child1;
else
return dwin->child2;
}
else {
window_t *parwin;
window_pair_t *dwin;
while (win->parent) {
parwin = win->parent;
dwin = parwin->data;
if (!dwin->backward) {
if (win == dwin->child1)
return dwin->child2;
}
else {
if (win == dwin->child2)
return dwin->child1;
}
win = parwin;
}
return NULL;
}
}
glui32 glk_window_get_rock(window_t *win)
{
if (!win) {
gli_strict_warning("window_get_rock: invalid ref.");
return 0;
}
return win->rock;
}
winid_t glk_window_get_root()
{
if (!gli_rootwin)
return NULL;
return gli_rootwin;
}
winid_t glk_window_get_parent(window_t *win)
{
if (!win) {
gli_strict_warning("window_get_parent: invalid ref");
return 0;
}
if (win->parent)
return win->parent;
else
return 0;
}
winid_t glk_window_get_sibling(window_t *win)
{
window_pair_t *dparwin;
if (!win) {
gli_strict_warning("window_get_sibling: invalid ref");
return 0;
}
if (!win->parent)
return 0;
dparwin = win->parent->data;
if (dparwin->child1 == win)
return dparwin->child2;
else if (dparwin->child2 == win)
return dparwin->child1;
return 0;
}
glui32 glk_window_get_type(window_t *win)
{
if (!win) {
gli_strict_warning("window_get_parent: invalid ref");
return 0;
}
return win->type;
}
void glk_window_get_size(window_t *win, glui32 *width, glui32 *height)
{
glui32 wid = 0;
glui32 hgt = 0;
int val;
int boxwidth, boxheight;
if (!win) {
gli_strict_warning("window_get_size: invalid ref");
return;
}
switch (win->type) {
case wintype_Blank:
case wintype_Pair:
/* always zero */
break;
case wintype_TextGrid:
boxwidth = win->bbox.right - win->bbox.left;
boxheight = win->bbox.bottom - win->bbox.top;
val = (int) floor((boxwidth-metrics.gridmarginx) / metrics.gridcharwidth);
wid = ((val >= 0) ? val : 0);
val = (int) floor((boxheight-metrics.gridmarginy) / metrics.gridcharheight);
hgt = ((val >= 0) ? val : 0);
break;
case wintype_TextBuffer:
boxwidth = win->bbox.right - win->bbox.left;
boxheight = win->bbox.bottom - win->bbox.top;
val = (int) floor((boxwidth-metrics.buffermarginx) / metrics.buffercharwidth);
wid = ((val >= 0) ? val : 0);
val = (int) floor((boxheight-metrics.buffermarginy) / metrics.buffercharheight);
hgt = ((val >= 0) ? val : 0);
break;
case wintype_Graphics:
boxwidth = win->bbox.right - win->bbox.left;
boxheight = win->bbox.bottom - win->bbox.top;
wid = (int) floor(boxwidth - metrics.graphicsmarginx);
hgt = (int) floor(boxheight - metrics.graphicsmarginy);
break;
}
if (width)
*width = wid;
if (height)
*height = hgt;
}
strid_t glk_window_get_stream(window_t *win)
{
if (!win) {
gli_strict_warning("window_get_stream: invalid ref");
return NULL;
}
return win->str;
}
strid_t glk_window_get_echo_stream(window_t *win)
{
if (!win) {
gli_strict_warning("window_get_echo_stream: invalid ref");
return 0;
}
if (win->echostr)
return win->echostr;
else
return 0;
}
void glk_window_set_echo_stream(window_t *win, stream_t *str)
{
if (!win) {
gli_strict_warning("window_set_echo_stream: invalid window id");
return;
}
win->echostr = str;
}
void glk_set_window(window_t *win)
{
if (!win) {
gli_stream_set_current(NULL);
}
else {
gli_stream_set_current(win->str);
}
}
void gli_windows_unechostream(stream_t *str)
{
window_t *win;
for (win=gli_windowlist; win; win=win->next) {
if (win->echostr == str)
win->echostr = NULL;
}
}
static glui32 *dup_buffer(void *buf, int len, int unicode)
{
int ix;
glui32 *res = malloc(len * sizeof(glui32));
if (!res)
return NULL;
if (!unicode) {
char *cbuf = (char *)buf;
for (ix=0; ix<len; ix++)
res[ix] = cbuf[ix];
}
else {
glui32 *cbuf = (glui32 *)buf;
for (ix=0; ix<len; ix++)
res[ix] = cbuf[ix];
}
return res;
}
#if GIDEBUG_LIBRARY_SUPPORT
/* A cache of debug lines generated this cycle. */
static gen_list_t debug_output_cache = { NULL, 0, 0 };
void gidebug_output(char *text)
{
/* Send a line of text to the "debug console", if the user has
requested debugging mode. */
if (gli_debugger) {
gen_list_append(&debug_output_cache, strdup(text));
}