Add Distributed Multihead X (DMX) support

1 files changed, 495 insertions, 0 deletions

diff --git a/hw/dmx/config/dmxconfig.c b/hw/dmx/config/dmxconfig.c
new file mode 100644
index 000000000..f276283a3
--- /dev/null
+++ b/hw/dmx/config/dmxconfig.c
@@ -0,0 +1,495 @@
+/* $XFree86$ */
+/*
+ * Copyright 2002-2003 Red Hat Inc., Durham, North Carolina.
+ *
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation on the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NON-INFRINGEMENT.  IN NO EVENT SHALL RED HAT AND/OR THEIR SUPPLIERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+/*
+ * Authors:
+ *   Rickard E. (Rik) Faith <faith@redhat.com>
+ *
+ */
+
+/** \file
+ * Provides interface for reading DMX configuration files and for
+ * combining that information with command-line configuration parameters. */
+    
+
+#include "dmx.h"
+#include "dmxinput.h"
+#include "dmxconfig.h"
+#include "dmxparse.h"
+#include "dmxlog.h"
+#include "dmxcb.h"
+#include "dmxstat.h"
+#include "parser.h"
+
+extern int  yyparse(void);
+extern FILE *yyin;
+
+static char *dmxXkbRules;
+static char *dmxXkbModel;
+static char *dmxXkbLayout;
+static char *dmxXkbVariant;
+static char *dmxXkbOptions;
+
+/** Stores lists of configuration information. */
+typedef struct DMXConfigListStruct {
+    const char                 *name;
+    struct DMXConfigListStruct *next;
+} DMXConfigList, *DMXConfigListPtr;
+
+/** This stucture stores the parsed configuration information. */
+typedef struct DMXConfigCmdStruct {
+    const char    *filename;
+    const char    *config;
+    DMXConfigList *displays;
+    DMXConfigList *inputs;
+    DMXConfigList *xinputs;
+} DMXConfigCmd, *DMXConfigCmdPtr;
+
+DMXConfigEntryPtr    dmxConfigEntry;
+static DMXConfigCmd  dmxConfigCmd;
+
+static int dmxDisplaysFromCommandLine;
+
+/** Make a note that \a display is the name of an X11 display that
+ * should be initialized as a backend (output) display.  Called from
+ * #ddxProcessArgument. */
+void dmxConfigStoreDisplay(const char *display)
+{
+    DMXConfigListPtr entry = malloc(sizeof(*entry));
+    entry->name = strdup(display);
+    entry->next = NULL;
+    if (!dmxConfigCmd.displays) dmxConfigCmd.displays = entry;
+    else {
+        DMXConfigList *pt;
+        for (pt = dmxConfigCmd.displays; pt->next; pt = pt->next);
+        if (!pt)
+            dmxLog(dmxFatal, "dmxConfigStoreDisplay: end of list non-NULL\n");
+        pt->next = entry;
+    }
+    ++dmxDisplaysFromCommandLine;
+}
+
+/** Make a note that \a input is the name of an X11 display that should
+ * be used for input (either a backend or a console input device). */
+void dmxConfigStoreInput(const char *input)
+{
+    DMXConfigListPtr entry = malloc(sizeof(*entry));
+    entry->name = strdup(input);
+    entry->next = NULL;
+    if (!dmxConfigCmd.inputs) dmxConfigCmd.inputs = entry;
+    else {
+        DMXConfigList *pt;
+        for (pt = dmxConfigCmd.inputs; pt->next; pt = pt->next);
+        if (!pt)
+            dmxLog(dmxFatal, "dmxConfigStoreInput: end of list non-NULL\n");
+        pt->next = entry;
+    }
+}
+
+/** Make a note that \a input is the name of an X11 display that should
+ * be used for input from XInput extension devices. */
+void dmxConfigStoreXInput(const char *input)
+{
+    DMXConfigListPtr entry = malloc(sizeof(*entry));
+    entry->name = strdup(input);
+    entry->next = NULL;
+    if (!dmxConfigCmd.xinputs) dmxConfigCmd.xinputs = entry;
+    else {
+        DMXConfigList *pt;
+        for (pt = dmxConfigCmd.xinputs; pt->next; pt = pt->next);
+        if (!pt)
+            dmxLog(dmxFatal, "dmxConfigStoreXInput: end of list non-NULL\n");
+        pt->next = entry;
+    }
+}
+
+/** Make a note that \a file is the configuration file. */
+void dmxConfigStoreFile(const char *file)
+{
+    if (dmxConfigCmd.filename)
+        dmxLog(dmxFatal, "Only one -configfile allowed\n");
+    dmxConfigCmd.filename = strdup(file);
+}
+
+/** Make a note that \a config should be used as the configuration for
+ * current instantiation of the DMX server. */
+void dmxConfigStoreConfig(const char *config)
+{
+    if (dmxConfigCmd.config) dmxLog(dmxFatal, "Only one -config allowed\n");
+    dmxConfigCmd.config = strdup(config);
+}
+
+static int dmxConfigReadFile(const char *filename, int debug)
+{
+    FILE *str;
+
+    if (!(str = fopen(filename, "r"))) return -1;
+    dmxLog(dmxInfo, "Reading configuration file \"%s\"\n", filename);
+    yyin    = str;
+    yydebug = debug;
+    yyparse();
+    fclose(str);
+    return 0;
+}
+
+static const char *dmxConfigMatch(const char *target, DMXConfigEntryPtr entry)
+{
+    DMXConfigVirtualPtr v     = entry->virtual;
+    const char          *name = NULL;
+
+    if (v && v->name) name = v->name;
+
+    if (v && !dmxConfigCmd.config) return v->name ? v->name : "<noname>";
+    if (!name)                     return NULL;
+    if (!strcmp(name, target))     return name;
+    return NULL;
+}
+
+static DMXScreenInfo *dmxConfigAddDisplay(const char *name,
+                                          int scrnWidth,   int scrnHeight,
+                                          int scrnX,       int scrnY,
+                                          int scrnXSign,   int scrnYSign,
+                                          int rootWidth,   int rootHeight,
+                                          int rootX,       int rootY,
+                                          int rootXSign,   int rootYSign)
+{
+    DMXScreenInfo *dmxScreen;
+    
+    if (!(dmxScreens = realloc(dmxScreens,
+                               (dmxNumScreens+1) * sizeof(*dmxScreens))))
+        dmxLog(dmxFatal,
+               "dmxConfigAddDisplay: realloc failed for screen %d (%s)\n",
+               dmxNumScreens, name);
+    
+    dmxScreen = &dmxScreens[dmxNumScreens];
+    memset(dmxScreen, 0, sizeof(*dmxScreen));
+    dmxScreen->name       = name;
+    dmxScreen->index      = dmxNumScreens;
+    dmxScreen->scrnWidth  = scrnWidth;
+    dmxScreen->scrnHeight = scrnHeight;
+    dmxScreen->scrnX      = scrnX;
+    dmxScreen->scrnY      = scrnY;
+    dmxScreen->scrnXSign  = scrnXSign;
+    dmxScreen->scrnYSign  = scrnYSign;
+    dmxScreen->rootWidth  = rootWidth;
+    dmxScreen->rootHeight = rootHeight;
+    dmxScreen->rootX      = rootX;
+    dmxScreen->rootY      = rootY;
+    dmxScreen->stat       = dmxStatAlloc();
+    ++dmxNumScreens;
+    return dmxScreen;
+}
+
+DMXInputInfo *dmxConfigAddInput(const char *name, int core)
+{
+    DMXInputInfo *dmxInput;
+
+    if (!(dmxInputs = realloc(dmxInputs,
+                              (dmxNumInputs+1) * sizeof(*dmxInputs))))
+        dmxLog(dmxFatal,
+               "dmxConfigAddInput: realloc failed for input %d (%s)\n",
+               dmxNumInputs, name);
+
+    dmxInput = &dmxInputs[dmxNumInputs];
+
+    memset(dmxInput, 0, sizeof(*dmxInput));
+    dmxInput->name     = name;
+    dmxInput->inputIdx = dmxNumInputs;
+    dmxInput->scrnIdx  = -1;
+    dmxInput->core     = core;
+    ++dmxNumInputs;
+    return dmxInput;
+}
+
+static void dmxConfigCopyFromDisplay(DMXConfigDisplayPtr d)
+{
+    DMXScreenInfo *dmxScreen;
+
+    dmxScreen         = dmxConfigAddDisplay(d->name,
+                                            d->scrnWidth, d->scrnHeight,
+                                            d->scrnX,     d->scrnY,
+                                            d->scrnXSign, d->scrnYSign,
+                                            d->rootWidth, d->rootHeight,
+                                            d->rootX,     d->rootY,
+                                            d->rootXSign, d->rootXSign);
+    dmxScreen->where  = PosAbsolute;
+    dmxScreen->whereX = d->rootXOrigin;
+    dmxScreen->whereY = d->rootYOrigin;
+}
+
+static void dmxConfigCopyFromWall(DMXConfigWallPtr w)
+{
+    DMXConfigStringPtr pt;
+    DMXScreenInfo      *dmxScreen;
+    int                edge = dmxNumScreens;
+    int                last = dmxNumScreens;
+
+    if (!w->xwall && !w->ywall) { /* Try to make it square */
+        int count;
+        for (pt = w->nameList, count = 0; pt; pt = pt->next) ++count;
+        w->xwall = sqrt(count) + .5;
+    }
+
+    for (pt = w->nameList; pt; pt = pt->next) {
+        dmxScreen = dmxConfigAddDisplay(pt->string, w->width, w->height,
+                                        0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
+        if (pt == w->nameList) { /* Upper left */
+            dmxScreen->where  = PosAbsolute;
+            dmxScreen->whereX = 0;
+            dmxScreen->whereY = 0;
+        } else if (w->xwall) {  /* Tile left to right, then top to bottom */
+            if (!((dmxNumScreens-1) % w->xwall)) {
+                dmxScreen->where          = PosBelow;
+                dmxScreen->whereRefScreen = edge;
+                edge                      = dmxNumScreens-1;
+            } else {
+                dmxScreen->where          = PosRightOf;
+                dmxScreen->whereRefScreen = last;
+            }
+        } else {                /* Tile top to bottom, then left to right */
+            if (!((dmxNumScreens-1) % w->ywall)) {
+                dmxScreen->where          = PosRightOf;
+                dmxScreen->whereRefScreen = edge;
+                edge                      = dmxNumScreens-1;
+            } else {
+                dmxScreen->where          = PosBelow;
+                dmxScreen->whereRefScreen = last;
+            }
+
+        }
+        last = dmxNumScreens-1;
+        if (dmxScreen->where == PosAbsolute)
+            dmxLog(dmxInfo, "Added %s at %d %d\n",
+                   pt->string, dmxScreen->whereX, dmxScreen->whereY);
+        else
+            dmxLog(dmxInfo, "Added %s %s %s\n",
+                   pt->string,
+                   dmxScreen->where == PosBelow ? "below" : "right of",
+                   dmxScreens[dmxScreen->whereRefScreen].name);
+    }
+}
+
+static void dmxConfigCopyFromOption(DMXConfigOptionPtr o)
+{
+    DMXConfigStringPtr pt;
+    int                argc   = 0;
+    char               **argv = NULL;
+
+    if (serverGeneration != 1) return; /* FIXME: only do once, for now */
+    if (!o || !o->string) return;
+    for (pt = o->option; pt; pt = pt->next) {
+        if (pt->string) {
+            ++argc;
+            argv = realloc(argv, (argc+1) * sizeof(*argv));
+            argv[argc] = (char *)pt->string;
+        }
+    }
+    argv[0] = NULL;
+    ProcessCommandLine(argc+1, argv);
+    free(argv);
+}
+
+static void dmxConfigCopyFromParam(DMXConfigParamPtr p)
+{
+    const char **argv;
+    int        argc;
+    
+    if ((argv = dmxConfigLookupParam(p, "xkbrules", &argc)) && argc == 2) {
+        dmxConfigSetXkbRules(argv[1]);
+    } else if ((argv = dmxConfigLookupParam(p, "xkbmodel", &argc))
+               && argc == 2) {
+        dmxConfigSetXkbModel(argv[1]);
+    } else if ((argv = dmxConfigLookupParam(p, "xkblayout", &argc))
+               && argc == 2) {
+        dmxConfigSetXkbLayout(argv[1]);
+    } else if ((argv = dmxConfigLookupParam(p, "xkbvariant", &argc))
+               && argc == 2) {
+        dmxConfigSetXkbVariant(argv[1]);
+    } else if ((argv = dmxConfigLookupParam(p, "xkboptions", &argc))
+               && argc == 2) {
+        dmxConfigSetXkbOptions(argv[1]);
+    }
+}
+
+static void dmxConfigCopyData(DMXConfigVirtualPtr v)
+{
+    DMXConfigSubPtr sub;
+    
+    if (v->dim) dmxSetWidthHeight(v->dim->x, v->dim->y);
+    else        dmxSetWidthHeight(0, 0);
+    for (sub = v->subentry; sub; sub = sub->next) {
+        switch (sub->type) {
+        case dmxConfigDisplay: dmxConfigCopyFromDisplay(sub->display); break;
+        case dmxConfigWall:    dmxConfigCopyFromWall(sub->wall);       break;
+        case dmxConfigOption:  dmxConfigCopyFromOption(sub->option);   break;
+        case dmxConfigParam:   dmxConfigCopyFromParam(sub->param);     break;
+        default:
+            dmxLog(dmxFatal,
+                   "dmxConfigCopyData: not a display, wall, or value\n");
+        }
+    }
+}
+
+static void dmxConfigFromCommandLine(void)
+{
+    DMXConfigListPtr pt;
+    
+    dmxLog(dmxInfo, "Using configuration from command line\n");
+    for (pt = dmxConfigCmd.displays; pt; pt = pt->next) {
+        DMXScreenInfo *dmxScreen = dmxConfigAddDisplay(pt->name,
+                                                       0, 0, 0, 0, 0, 0,
+                                                       0, 0, 0, 0, 0, 0);
+        if (dmxNumScreens == 1) {
+            dmxScreen->where  = PosAbsolute;
+            dmxScreen->whereX = 0;
+            dmxScreen->whereY = 0;
+            dmxLog(dmxInfo, "Added %s at %d %d\n",
+                   dmxScreen->name, dmxScreen->whereX, dmxScreen->whereY);
+        } else {
+            dmxScreen->where          = PosRightOf;
+            dmxScreen->whereRefScreen = dmxNumScreens - 2;
+            if (dmxScreen->whereRefScreen < 0) dmxScreen->whereRefScreen = 0;
+            dmxLog(dmxInfo, "Added %s %s %s\n",
+                   dmxScreen->name,
+                   dmxScreen->where == PosBelow ? "below" : "right of",
+                   dmxScreens[dmxScreen->whereRefScreen].name);
+        }
+    }
+}
+
+static void dmxConfigFromConfigFile(void)
+{
+    DMXConfigEntryPtr pt;
+    const char        *name;
+
+    for (pt = dmxConfigEntry; pt; pt = pt->next) {
+                                /* FIXME -- if an input is specified, use it */
+        if (pt->type != dmxConfigVirtual) continue;
+        if ((name = dmxConfigMatch(dmxConfigCmd.config, pt))) {
+            dmxLog(dmxInfo, "Using configuration \"%s\"\n", name);
+            dmxConfigCopyData(pt->virtual);
+            return;
+        }
+    }
+    dmxLog(dmxFatal, "Could not find configuration \"%s\" in \"%s\"\n",
+           dmxConfigCmd.config, dmxConfigCmd.filename);
+}
+
+static void dmxConfigConfigInputs(void)
+{
+    DMXConfigListPtr pt;
+
+    if (dmxNumInputs) return;
+    
+    if (dmxConfigCmd.inputs) {   /* Use command line */
+        for (pt = dmxConfigCmd.inputs; pt; pt = pt->next)
+            dmxConfigAddInput(pt->name, TRUE);
+    } else if (dmxNumScreens) { /* Use first display */
+        dmxConfigAddInput(dmxScreens[0].name, TRUE);
+    } else {                     /* Use dummy */
+        dmxConfigAddInput("dummy", TRUE);
+    }
+
+    if (dmxConfigCmd.xinputs) {  /* Non-core devices from command line */
+        for (pt = dmxConfigCmd.xinputs; pt; pt = pt->next)
+            dmxConfigAddInput(pt->name, FALSE);
+    }
+}
+
+/** Set up the appropriate global variables so that the DMX server will
+ * be initialized using the configuration specified in the config file
+ * and on the command line. */
+void dmxConfigConfigure(void)
+{
+    if (dmxConfigEntry) {
+        dmxConfigFreeEntry(dmxConfigEntry);
+        dmxConfigEntry = NULL;
+    }
+    if (dmxConfigCmd.filename) {
+        if (dmxConfigCmd.displays)
+            dmxLog(dmxWarning,
+                   "Using configuration file \"%s\" instead of command line\n",
+                   dmxConfigCmd.filename);
+        dmxConfigReadFile(dmxConfigCmd.filename, 0);
+        dmxConfigFromConfigFile();
+    } else {
+        if (dmxConfigCmd.config)
+            dmxLog(dmxWarning,
+                   "Configuration name (%s) without configuration file\n",
+                   dmxConfigCmd.config);
+        dmxConfigFromCommandLine();
+    }
+    dmxConfigConfigInputs();
+}
+
+/** This function determines the number of displays we WILL have and
+ * sets MAXSCREENS to that value.  This is difficult since the number
+ * depends on the command line (which is easy to count) or on the config
+ * file, which has to be parsed. */
+void dmxConfigSetMaxScreens(void)
+{
+    static int processing = 0;
+
+    if (processing) return;     /* Prevent reentry via ProcessCommandLine */
+    processing = 1;
+    if (dmxConfigCmd.filename) {
+        if (!dmxNumScreens)
+            dmxConfigConfigure();
+#ifndef MAXSCREENS
+        SetMaxScreens(dmxNumScreens);
+#endif
+    } else
+#ifndef MAXSCREENS
+        SetMaxScreens(dmxDisplaysFromCommandLine);
+#endif
+    processing = 0;
+}
+
+/** This macro is used to generate the following access methods:
+ * - dmxConfig{Set,Get}rules
+ * - dmxConfig{Set,Get}model
+ * - dmxConfig{Set,Get}layout
+ * - dmxConfig{Set,Get}variant
+ * - dmxConfig{Set,Get}options
+ * These methods are used to read and write information about the keyboard. */
+
+#define GEN(param,glob,def)                                                   \
+ void dmxConfigSet##glob(const char *param) {                                 \
+     if (dmx##glob) free((void *)dmx##glob);                                  \
+     dmx##glob = strdup(param);                                               \
+ }                                                                            \
+ char *dmxConfigGet##glob(void) {                                             \
+     return (char *)(dmx##glob ? dmx##glob : def);                            \
+ }
+
+GEN(rules,   XkbRules,   DMX_DEFAULT_XKB_RULES)
+GEN(model,   XkbModel,   DMX_DEFAULT_XKB_MODEL)
+GEN(layout,  XkbLayout,  DMX_DEFAULT_XKB_LAYOUT)
+GEN(variant, XkbVariant, DMX_DEFAULT_XKB_VARIANT)
+GEN(options, XkbOptions, DMX_DEFAULT_XKB_OPTIONS)
+