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- /*
- * tkBind.c --
- *
- * This file provides procedures that associate Tcl commands
- * with X events or sequences of X events.
- *
- * Copyright 1989-1991 Regents of the University of California
- * Permission to use, copy, modify, and distribute this
- * software and its documentation for any purpose and without
- * fee is hereby granted, provided that the above copyright
- * notice appear in all copies. The University of California
- * makes no representations about the suitability of this
- * software for any purpose. It is provided "as is" without
- * express or implied warranty.
- */
-
- #ifndef lint
- static char rcsid[] = "$Header: /user6/ouster/wish/RCS/tkBind.c,v 1.48 92/08/10 16:55:24 ouster Exp $ SPRITE (Berkeley)";
- #endif /* not lint */
-
- #include "tkConfig.h"
- #include "tkInt.h"
-
- /*
- * The structure below represents a binding table. A binding table
- * represents a domain in which event bindings may occur. It includes
- * a space of objects relative to which events occur (usually windows,
- * but not always), a history of recent events in the domain, and
- * a set of mappings that associate particular Tcl commands with sequences
- * of events in the domain. Multiple binding tables may exist at once,
- * either because there are multiple applications open, or because there
- * are multiple domains within an application with separate event
- * bindings for each (for example, each canvas widget has a separate
- * binding table for associating events with the items in the canvas).
- */
-
- #define EVENT_BUFFER_SIZE 10
- typedef struct BindingTable {
- XEvent eventRing[EVENT_BUFFER_SIZE];/* Circular queue of recent events
- * (higher indices are for more recent
- * events). */
- int detailRing[EVENT_BUFFER_SIZE]; /* "Detail" information (keySym or
- * button or 0) for each entry in
- * eventRing. */
- int curEvent; /* Index in eventRing of most recent
- * event. Newer events have higher
- * indices. */
- Tcl_HashTable patternTable; /* Used to map from an event to a list
- * of patterns that may match that
- * event. Keys are PatternTableKey
- * structs, values are (PatSeq *). */
- Tcl_HashTable objectTable; /* Used to map from an object to a list
- * of patterns associated with that
- * object. Keys are ClientData,
- * values are (PatSeq *). */
- Tcl_Interp *interp; /* Interpreter in which commands are
- * executed. */
- } BindingTable;
-
- /*
- * Structures of the following form are used as keys in the patternTable
- * for a binding table:
- */
-
- typedef struct PatternTableKey {
- ClientData object; /* Identifies object (or class of objects)
- * relative to which event occurred. For
- * example, in the widget binding table for
- * an application this is the path name of
- * a widget, or a widget class, or "all". */
- int type; /* Type of event (from X). */
- int detail; /* Additional information, such as
- * keysym or button, or 0 if nothing
- * additional.*/
- } PatternTableKey;
-
- /*
- * The following structure defines a pattern, which is matched
- * against X events as part of the process of converting X events
- * into Tcl commands.
- */
-
- typedef struct Pattern {
- int eventType; /* Type of X event, e.g. ButtonPress. */
- int needMods; /* Mask of modifiers that must be
- * present (0 means no modifiers are
- * required). */
- int hateMods; /* Mask of modifiers that must not be
- * present (0 means any modifiers are
- * OK). */
- int detail; /* Additional information that must
- * match event. Normally this is 0,
- * meaning no additional information
- * must match. For KeyPress and
- * KeyRelease events, a keySym may
- * be specified to select a
- * particular keystroke (0 means any
- * keystrokes). For button events,
- * specifies a particular button (0
- * means any buttons are OK). */
- } Pattern;
-
- /*
- * The structure below defines a pattern sequence, which consists
- * of one or more patterns. In order to trigger, a pattern
- * sequence must match the most recent X events (first pattern
- * to most recent event, next pattern to next event, and so on).
- */
-
- typedef struct PatSeq {
- int numPats; /* Number of patterns in sequence
- * (usually 1). */
- char *command; /* Command to invoke when this
- * pattern sequence matches (malloc-ed). */
- int flags; /* Miscellaneous flag values; see
- * below for definitions. */
- struct PatSeq *nextSeqPtr;
- /* Next in list of all pattern
- * sequences that have the same
- * initial pattern. NULL means
- * end of list. */
- Tcl_HashEntry *hPtr; /* Pointer to hash table entry for
- * the initial pattern. This is the
- * head of the list of which nextSeqPtr
- * forms a part. */
- ClientData object; /* Identifies object with which event is
- * associated (e.g. window). */
- struct PatSeq *nextObjPtr;
- /* Next in list of all pattern
- * sequences for the same object
- * (NULL for end of list). Needed to
- * implement Tk_DeleteAllBindings. */
- Pattern pats[1]; /* Array of "numPats" patterns. Only
- * one element is declared here but
- * in actuality enough space will be
- * allocated for "numPats" patterns.
- * To match, pats[0] must match event
- * n, pats[1] must match event n-1,
- * etc. */
- } PatSeq;
-
- /*
- * Flag values for PatSeq structures:
- *
- * PAT_NEARBY 1 means that all of the events matching
- * this sequence must occur with nearby X
- * and Y mouse coordinates and close in time.
- * This is typically used to restrict multiple
- * button presses.
- * PAT_PERCENTS 1 means that the command for this pattern
- * requires percent substitution. 0 means there
- * are no percents in the command.
- */
-
- #define PAT_NEARBY 1
- #define PAT_PERCENTS 2
-
- /*
- * Constants that define how close together two events must be
- * in milliseconds or pixels to meet the PAT_NEARBY constraint:
- */
-
- #define NEARBY_PIXELS 5
- #define NEARBY_MS 500
-
- /*
- * The data structure and hash table below are used to map from
- * textual keysym names to keysym numbers. This structure is
- * present here because the corresponding X procedures are
- * ridiculously slow.
- */
-
- typedef struct {
- char *name; /* Name of keysym. */
- KeySym value; /* Numeric identifier for keysym. */
- } KeySymInfo;
- KeySymInfo keyArray[] = {
- #ifndef lint
- #include "ks_names.h"
- #endif
- (char *) NULL, 0
- };
- static Tcl_HashTable keySymTable; /* Hashed form of above structure. */
-
- static int initialized = 0;
-
- /*
- * A hash table is kept to map from the string names of event
- * modifiers to information about those modifiers. The structure
- * for storing this information, and the hash table built at
- * initialization time, are defined below.
- */
-
- typedef struct {
- char *name; /* Name of modifier. */
- int mask; /* Button/modifier mask value, * such as Button1Mask. */
- int flags; /* Various flags; see below for
- * definitions. */
- } ModInfo;
-
- /*
- * Flags for ModInfo structures:
- *
- * DOUBLE - Non-zero means duplicate this event,
- * e.g. for double-clicks.
- * TRIPLE - Non-zero means triplicate this event,
- * e.g. for triple-clicks.
- * ANY - Non-zero means that this event allows
- * any unspecified modifiers.
- */
-
- #define DOUBLE 1
- #define TRIPLE 2
- #define ANY 4
-
- static ModInfo modArray[] = {
- "Control", ControlMask, 0,
- "Shift", ShiftMask, 0,
- "Lock", LockMask, 0,
- "B1", Button1Mask, 0,
- "Button1", Button1Mask, 0,
- "B2", Button2Mask, 0,
- "Button2", Button2Mask, 0,
- "B3", Button3Mask, 0,
- "Button3", Button3Mask, 0,
- "B4", Button4Mask, 0,
- "Button4", Button4Mask, 0,
- "B5", Button5Mask, 0,
- "Button5", Button5Mask, 0,
- "Mod1", Mod1Mask, 0,
- "M1", Mod1Mask, 0,
- "Meta", Mod1Mask, 0,
- "M", Mod1Mask, 0,
- "Mod2", Mod2Mask, 0,
- "M2", Mod2Mask, 0,
- "Alt", Mod2Mask, 0,
- "Mod3", Mod3Mask, 0,
- "M3", Mod3Mask, 0,
- "Mod4", Mod4Mask, 0,
- "M4", Mod4Mask, 0,
- "Mod5", Mod5Mask, 0,
- "M5", Mod5Mask, 0,
- "Double", 0, DOUBLE,
- "Triple", 0, TRIPLE,
- "Any", 0, ANY,
- NULL, 0, 0};
- static Tcl_HashTable modTable;
-
- /*
- * This module also keeps a hash table mapping from event names
- * to information about those events. The structure, an array
- * to use to initialize the hash table, and the hash table are
- * all defined below.
- */
-
- typedef struct {
- char *name; /* Name of event. */
- int type; /* Event type for X, such as
- * ButtonPress. */
- int eventMask; /* Mask bits (for XSelectInput)
- * for this event type. */
- } EventInfo;
-
- /*
- * Note: some of the masks below are an OR-ed combination of
- * several masks. This is necessary because X doesn't report
- * up events unless you also ask for down events. Also, X
- * doesn't report button state in motion events unless you've
- * asked about button events.
- */
-
- static EventInfo eventArray[] = {
- "Motion", MotionNotify,
- ButtonPressMask|PointerMotionMask,
- "Button", ButtonPress, ButtonPressMask,
- "ButtonPress", ButtonPress, ButtonPressMask,
- "ButtonRelease", ButtonRelease,
- ButtonPressMask|ButtonReleaseMask,
- "Colormap", ColormapNotify, ColormapChangeMask,
- "Enter", EnterNotify, EnterWindowMask,
- "Leave", LeaveNotify, LeaveWindowMask,
- "Expose", Expose, ExposureMask,
- "FocusIn", FocusIn, FocusChangeMask,
- "FocusOut", FocusOut, FocusChangeMask,
- "Keymap", KeymapNotify, KeymapStateMask,
- "Key", KeyPress, KeyPressMask,
- "KeyPress", KeyPress, KeyPressMask,
- "KeyRelease", KeyRelease,
- KeyPressMask|KeyReleaseMask,
- "Property", PropertyNotify, PropertyChangeMask,
- "ResizeRequest", ResizeRequest, ResizeRedirectMask,
- "Circulate", CirculateNotify, StructureNotifyMask,
- "Configure", ConfigureNotify, StructureNotifyMask,
- "Destroy", DestroyNotify, StructureNotifyMask,
- "Gravity", GravityNotify, StructureNotifyMask,
- "Map", MapNotify, StructureNotifyMask,
- "Reparent", ReparentNotify, StructureNotifyMask,
- "Unmap", UnmapNotify, StructureNotifyMask,
- "Visibility", VisibilityNotify, VisibilityChangeMask,
- "CirculateRequest", CirculateRequest, SubstructureRedirectMask,
- "ConfigureRequest", ConfigureRequest, SubstructureRedirectMask,
- "MapRequest", MapRequest, SubstructureRedirectMask,
- (char *) NULL, 0, 0};
- static Tcl_HashTable eventTable;
-
- /*
- * The defines and table below are used to classify events into
- * various groups. The reason for this is that logically identical
- * fields (e.g. "state") appear at different places in different
- * types of events. The classification masks can be used to figure
- * out quickly where to extract information from events.
- */
-
- #define KEY_BUTTON_MOTION 0x1
- #define CROSSING 0x2
- #define FOCUS 0x4
- #define EXPOSE 0x8
- #define VISIBILITY 0x10
- #define CREATE 0x20
- #define MAP 0x40
- #define REPARENT 0x80
- #define CONFIG 0x100
- #define CONFIG_REQ 0x200
- #define RESIZE_REQ 0x400
- #define GRAVITY 0x800
- #define PROP 0x0100
- #define SEL_CLEAR 0x2000
- #define SEL_REQ 0x4000
- #define SEL_NOTIFY 0x8000
- #define COLORMAP 0x10000
- #define MAPPING 0x20000
-
- static int flagArray[LASTEvent] = {
- /* Not used */ 0,
- /* Not used */ 0,
- /* KeyPress */ KEY_BUTTON_MOTION,
- /* KeyRelease */ KEY_BUTTON_MOTION,
- /* ButtonPress */ KEY_BUTTON_MOTION,
- /* ButtonRelease */ KEY_BUTTON_MOTION,
- /* MotionNotify */ KEY_BUTTON_MOTION,
- /* EnterNotify */ CROSSING,
- /* LeaveNotify */ CROSSING,
- /* FocusIn */ FOCUS,
- /* FocusOut */ FOCUS,
- /* KeymapNotify */ 0,
- /* Expose */ EXPOSE,
- /* GraphicsExpose */ EXPOSE,
- /* NoExpose */ 0,
- /* VisibilityNotify */ VISIBILITY,
- /* CreateNotify */ CREATE,
- /* DestroyNotify */ 0,
- /* UnmapNotify */ 0,
- /* MapNotify */ MAP,
- /* MapRequest */ 0,
- /* ReparentNotify */ REPARENT,
- /* ConfigureNotify */ CONFIG,
- /* ConfigureRequest */ CONFIG_REQ,
- /* GravityNotify */ 0,
- /* ResizeRequest */ RESIZE_REQ,
- /* CirculateNotify */ 0,
- /* CirculateRequest */ 0,
- /* PropertyNotify */ PROP,
- /* SelectionClear */ SEL_CLEAR,
- /* SelectionRequest */ SEL_REQ,
- /* SelectionNotify */ SEL_NOTIFY,
- /* ColormapNotify */ COLORMAP,
- /* ClientMessage */ 0,
- /* MappingNotify */ MAPPING
- };
-
- /*
- * Forward declarations for procedures defined later in this
- * file:
- */
-
- static char * ExpandPercents _ANSI_ARGS_((char *before,
- XEvent *eventPtr, KeySym keySym, char *after,
- int afterSize));
- static PatSeq * FindSequence _ANSI_ARGS_((Tcl_Interp *interp,
- BindingTable *bindPtr, ClientData object,
- char *eventString, int create,
- unsigned long *maskPtr));
- static char * GetField _ANSI_ARGS_((char *p, char *copy, int size));
- static KeySym GetKeySym _ANSI_ARGS_((TkDisplay *dispPtr,
- XEvent *eventPtr));
- static PatSeq * MatchPatterns _ANSI_ARGS_((BindingTable *bindPtr,
- PatSeq *psPtr));
-
- /*
- *--------------------------------------------------------------
- *
- * Tk_CreateBindingTable --
- *
- * Set up a new domain in which event bindings may be created.
- *
- * Results:
- * The return value is a token for the new table, which must
- * be passed to procedures like Tk_CreatBinding.
- *
- * Side effects:
- * Memory is allocated for the new table.
- *
- *--------------------------------------------------------------
- */
-
- Tk_BindingTable
- Tk_CreateBindingTable(interp)
- Tcl_Interp *interp; /* Interpreter to associate with the binding
- * table: commands are executed in this
- * interpreter. */
- {
- register BindingTable *bindPtr;
- int i;
-
- /*
- * If this is the first time a binding table has been created,
- * initialize the global data structures.
- */
-
- if (!initialized) {
- register KeySymInfo *kPtr;
- register Tcl_HashEntry *hPtr;
- register ModInfo *modPtr;
- register EventInfo *eiPtr;
- int dummy;
-
- initialized = 1;
-
- Tcl_InitHashTable(&keySymTable, TCL_STRING_KEYS);
- for (kPtr = keyArray; kPtr->name != NULL; kPtr++) {
- hPtr = Tcl_CreateHashEntry(&keySymTable, kPtr->name, &dummy);
- Tcl_SetHashValue(hPtr, kPtr->value);
- }
-
- Tcl_InitHashTable(&modTable, TCL_STRING_KEYS);
- for (modPtr = modArray; modPtr->name != NULL; modPtr++) {
- hPtr = Tcl_CreateHashEntry(&modTable, modPtr->name, &dummy);
- Tcl_SetHashValue(hPtr, modPtr);
- }
-
- Tcl_InitHashTable(&eventTable, TCL_STRING_KEYS);
- for (eiPtr = eventArray; eiPtr->name != NULL; eiPtr++) {
- hPtr = Tcl_CreateHashEntry(&eventTable, eiPtr->name, &dummy);
- Tcl_SetHashValue(hPtr, eiPtr);
- }
- }
-
- /*
- * Create and initialize a new binding table.
- */
-
- bindPtr = (BindingTable *) ckalloc(sizeof(BindingTable));
- for (i = 0; i < EVENT_BUFFER_SIZE; i++) {
- bindPtr->eventRing[i].type = -1;
- }
- bindPtr->curEvent = 0;
- Tcl_InitHashTable(&bindPtr->patternTable,
- sizeof(PatternTableKey)/sizeof(int));
- Tcl_InitHashTable(&bindPtr->objectTable, TCL_ONE_WORD_KEYS);
- bindPtr->interp = interp;
- return (Tk_BindingTable) bindPtr;
- }
-
- /*
- *--------------------------------------------------------------
- *
- * Tk_DeleteBindingTable --
- *
- * Destroy a binding table and free up all its memory.
- * The caller should not use bindingTable again after
- * this procedure returns.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Memory is freed.
- *
- *--------------------------------------------------------------
- */
-
- void
- Tk_DeleteBindingTable(bindingTable)
- Tk_BindingTable bindingTable; /* Token for the binding table to
- * destroy. */
- {
- BindingTable *bindPtr = (BindingTable *) bindingTable;
- PatSeq *psPtr, *nextPtr;
- Tcl_HashEntry *hPtr;
- Tcl_HashSearch search;
-
- /*
- * Find and delete all of the patterns associated with the binding
- * table.
- */
-
- for (hPtr = Tcl_FirstHashEntry(&bindPtr->patternTable, &search);
- hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) {
- for (psPtr = (PatSeq *) Tcl_GetHashValue(hPtr);
- psPtr != NULL; psPtr = nextPtr) {
- nextPtr = psPtr->nextSeqPtr;
- Tk_EventuallyFree((ClientData) psPtr->command,
- (Tk_FreeProc *) free);
- ckfree((char *) psPtr);
- }
- }
-
- /*
- * Clean up the rest of the information associated with the
- * binding table.
- */
-
- Tcl_DeleteHashTable(&bindPtr->patternTable);
- Tcl_DeleteHashTable(&bindPtr->objectTable);
- ckfree((char *) bindPtr);
- }
-
- /*
- *--------------------------------------------------------------
- *
- * Tk_CreateBinding --
- *
- * Add a binding to a binding table, so that future calls to
- * Tk_BindEvent may execute the command in the binding.
- *
- * Results:
- * The return value is 0 if an error occurred while setting
- * up the binding. In this case, an error message will be
- * left in interp->result. If all went well then the return
- * value is a mask of the event types that must be made
- * available to Tk_BindEvent in order to properly detect when
- * this binding triggers. This value can be used to determine
- * what events to select for in a window, for example.
- *
- * Side effects:
- * The new binding may cause future calls to Tk_BindEvent to
- * behave differently than they did previously.
- *
- *--------------------------------------------------------------
- */
-
- unsigned long
- Tk_CreateBinding(interp, bindingTable, object, eventString, command, append)
- Tcl_Interp *interp; /* Used for error reporting. */
- Tk_BindingTable bindingTable; /* Table in which to create binding. */
- ClientData object; /* Token for object with which binding
- * is associated. */
- char *eventString; /* String describing event sequence
- * that triggers binding. */
- char *command; /* Contains Tcl command to execute
- * when binding triggers. */
- int append; /* 0 means replace any existing
- * binding for eventString; 1 means
- * append to that binding. */
- {
- BindingTable *bindPtr = (BindingTable *) bindingTable;
- register PatSeq *psPtr;
- unsigned long eventMask;
-
- psPtr = FindSequence(interp, bindPtr, object, eventString, 1, &eventMask);
- if (psPtr == NULL) {
- return 0;
- }
- if (append && (psPtr->command != NULL)) {
- int length;
- char *new;
-
- length = strlen(psPtr->command) + strlen(command) + 3;
- new = (char *) ckalloc((unsigned) length);
- sprintf(new, "%s; %s", psPtr->command, command);
- Tk_EventuallyFree((ClientData) psPtr->command, (Tk_FreeProc *) free);
- psPtr->command = new;
- } else {
- if (psPtr->command != NULL) {
- Tk_EventuallyFree((ClientData) psPtr->command,
- (Tk_FreeProc *) free);
- }
- psPtr->command = (char *) ckalloc((unsigned) (strlen(command) + 1));
- strcpy(psPtr->command, command);
- }
-
- /*
- * See if the command contains percents and thereby requires
- * percent substitution.
- */
-
- if (strchr(psPtr->command, '%') != NULL) {
- psPtr->flags |= PAT_PERCENTS;
- }
- return eventMask;
- }
-
- /*
- *--------------------------------------------------------------
- *
- * Tk_DeleteBinding --
- *
- * Remove an event binding from a binding table.
- *
- * Results:
- * The result is a standard Tcl return value. If an error
- * occurs then interp->result will contain an error message.
- *
- * Side effects:
- * The binding given by object and eventString is removed
- * from bindingTable.
- *
- *--------------------------------------------------------------
- */
-
- int
- Tk_DeleteBinding(interp, bindingTable, object, eventString)
- Tcl_Interp *interp; /* Used for error reporting. */
- Tk_BindingTable bindingTable; /* Table in which to delete binding. */
- ClientData object; /* Token for object with which binding
- * is associated. */
- char *eventString; /* String describing event sequence
- * that triggers binding. */
- {
- BindingTable *bindPtr = (BindingTable *) bindingTable;
- register PatSeq *psPtr, *prevPtr;
- unsigned long eventMask;
- Tcl_HashEntry *hPtr;
-
- psPtr = FindSequence(interp, bindPtr, object, eventString, 0, &eventMask);
- if (psPtr == NULL) {
- Tcl_ResetResult(interp);
- return TCL_OK;
- }
-
- /*
- * Unlink the binding from the list for its object, then from the
- * list for its pattern.
- */
-
- hPtr = Tcl_FindHashEntry(&bindPtr->objectTable, (char *) object);
- if (hPtr == NULL) {
- panic("Tk_DeleteBinding couldn't find object table entry");
- }
- prevPtr = (PatSeq *) Tcl_GetHashValue(hPtr);
- if (prevPtr == psPtr) {
- Tcl_SetHashValue(hPtr, psPtr->nextObjPtr);
- } else {
- for ( ; ; prevPtr = prevPtr->nextObjPtr) {
- if (prevPtr == NULL) {
- panic("Tk_DeleteBinding couldn't find on object list");
- }
- if (prevPtr->nextObjPtr == psPtr) {
- prevPtr->nextObjPtr = psPtr->nextObjPtr;
- break;
- }
- }
- }
- prevPtr = (PatSeq *) Tcl_GetHashValue(psPtr->hPtr);
- if (prevPtr == psPtr) {
- if (psPtr->nextSeqPtr == NULL) {
- Tcl_DeleteHashEntry(psPtr->hPtr);
- } else {
- Tcl_SetHashValue(psPtr->hPtr, psPtr->nextSeqPtr);
- }
- } else {
- for ( ; ; prevPtr = prevPtr->nextSeqPtr) {
- if (prevPtr == NULL) {
- panic("Tk_DeleteBinding couldn't find on hash chain");
- }
- if (prevPtr->nextSeqPtr == psPtr) {
- prevPtr->nextSeqPtr = psPtr->nextSeqPtr;
- break;
- }
- }
- }
- Tk_EventuallyFree((ClientData) psPtr->command, (Tk_FreeProc *) free);
- ckfree((char *) psPtr);
- return TCL_OK;
- }
-
- /*
- *--------------------------------------------------------------
- *
- * Tk_GetBinding --
- *
- * Return the command associated with a given event string.
- *
- * Results:
- * The return value is a pointer to the command string
- * associated with eventString for object in the domain
- * given by bindingTable. If there is no binding for
- * eventString, or if eventString is improperly formed,
- * then NULL is returned and an error message is left in
- * interp->result. The return value is semi-static: it
- * will persist until the binding is changed or deleted.
- *
- * Side effects:
- * None.
- *
- *--------------------------------------------------------------
- */
-
- char *
- Tk_GetBinding(interp, bindingTable, object, eventString)
- Tcl_Interp *interp; /* Interpreter for error reporting. */
- Tk_BindingTable bindingTable; /* Table in which to look for
- * binding. */
- ClientData object; /* Token for object with which binding
- * is associated. */
- char *eventString; /* String describing event sequence
- * that triggers binding. */
- {
- BindingTable *bindPtr = (BindingTable *) bindingTable;
- register PatSeq *psPtr;
- unsigned long eventMask;
-
- psPtr = FindSequence(interp, bindPtr, object, eventString, 0, &eventMask);
- if (psPtr == NULL) {
- return NULL;
- }
- return psPtr->command;
- }
-
- /*
- *--------------------------------------------------------------
- *
- * Tk_GetAllBindings --
- *
- * Return a list of event strings for all the bindings
- * associated with a given object.
- *
- * Results:
- * There is no return value. Interp->result is modified to
- * hold a Tcl list with one entry for each binding associated
- * with object in bindingTable. Each entry in the list
- * contains the event string associated with one binding.
- *
- * Side effects:
- * None.
- *
- *--------------------------------------------------------------
- */
-
- void
- Tk_GetAllBindings(interp, bindingTable, object)
- Tcl_Interp *interp; /* Interpreter for error reporting. */
- Tk_BindingTable bindingTable; /* Table in which to look for
- * bindings. */
- ClientData object; /* Token for object. */
-
- {
- BindingTable *bindPtr = (BindingTable *) bindingTable;
- register PatSeq *psPtr;
- register Pattern *patPtr;
- Tcl_HashEntry *hPtr;
- char string[200*EVENT_BUFFER_SIZE];
- register char *p;
- int patsLeft, needMods;
- register ModInfo *modPtr;
-
- hPtr = Tcl_FindHashEntry(&bindPtr->objectTable, (char *) object);
- if (hPtr == NULL) {
- return;
- }
- for (psPtr = (PatSeq *) Tcl_GetHashValue(hPtr); psPtr != NULL;
- psPtr = psPtr->nextObjPtr) {
-
- p = string;
-
- /*
- * For each binding, output information about each of the
- * patterns in its sequence. The order of the patterns in
- * the sequence is backwards from the order in which they
- * must be output.
- */
-
- for (patsLeft = psPtr->numPats,
- patPtr = &psPtr->pats[psPtr->numPats - 1];
- patsLeft > 0; patsLeft--, patPtr--) {
-
- /*
- * Check for simple case of an ASCII character.
- */
-
- if ((patPtr->eventType == KeyPress)
- && (patPtr->needMods == 0)
- && (patPtr->hateMods == ~ShiftMask)
- && isascii(patPtr->detail) && isprint(patPtr->detail)
- && (patPtr->detail != '<')
- && (patPtr->detail != ' ')) {
-
- *p = patPtr->detail;
- p++;
- continue;
- }
-
- /*
- * It's a more general event specification. First check
- * for "Double" or "Triple", then "Any", then modifiers,
- * the event type, then keysym or button detail.
- */
-
- *p = '<';
- p++;
- if ((patsLeft > 1) && (memcmp((char *) patPtr,
- (char *) (patPtr-1), sizeof(Pattern)) == 0)) {
- patsLeft--;
- patPtr--;
- if ((patsLeft > 1) && (memcmp((char *) patPtr,
- (char *) (patPtr-1), sizeof(Pattern)) == 0)) {
- patsLeft--;
- patPtr--;
- strcpy(p, "Triple-");
- } else {
- strcpy(p, "Double-");
- }
- p += strlen(p);
- }
-
- if (patPtr->hateMods == 0) {
- strcpy(p, "Any-");
- p += strlen(p);
- }
-
- for (needMods = patPtr->needMods, modPtr = modArray;
- needMods != 0; modPtr++) {
- if (modPtr->mask & needMods) {
- needMods &= ~modPtr->mask;
- strcpy(p, modPtr->name);
- p += strlen(p);
- *p = '-';
- p++;
- }
- }
-
- if ((patPtr->eventType != KeyPress)
- || (patPtr->detail == 0)) {
- register EventInfo *eiPtr;
-
- for (eiPtr = eventArray; eiPtr->name != NULL; eiPtr++) {
- if (eiPtr->type == patPtr->eventType) {
- strcpy(p, eiPtr->name);
- p += strlen(p);
- if (patPtr->detail != 0) {
- *p = '-';
- p++;
- }
- break;
- }
- }
- }
-
- if (patPtr->detail != 0) {
- if ((patPtr->eventType == KeyPress)
- || (patPtr->eventType == KeyRelease)) {
- register KeySymInfo *kPtr;
-
- for (kPtr = keyArray; kPtr->name != NULL; kPtr++) {
- if (patPtr->detail == (int) kPtr->value) {
- sprintf(p, "%.100s", kPtr->name);
- p += strlen(p);
- break;
- }
- }
- } else {
- sprintf(p, "%d", patPtr->detail);
- p += strlen(p);
- }
- }
- *p = '>';
- p++;
- }
- *p = 0;
- if ((p - string) >= sizeof(string)) {
- panic("Tk_GetAllBindings overflowed buffer");
- }
- Tcl_AppendElement(interp, string, 0);
- }
- }
-
- /*
- *--------------------------------------------------------------
- *
- * Tk_DeleteAllBindings --
- *
- * Remove all bindings associated with a given object in a
- * given binding table.
- *
- * Results:
- * All bindings associated with object are removed from
- * bindingTable.
- *
- * Side effects:
- * None.
- *
- *--------------------------------------------------------------
- */
-
- void
- Tk_DeleteAllBindings(bindingTable, object)
- Tk_BindingTable bindingTable; /* Table in which to delete
- * bindings. */
- ClientData object; /* Token for object. */
- {
- BindingTable *bindPtr = (BindingTable *) bindingTable;
- register PatSeq *psPtr, *prevPtr;
- PatSeq *nextPtr;
- Tcl_HashEntry *hPtr;
-
- hPtr = Tcl_FindHashEntry(&bindPtr->objectTable, (char *) object);
- if (hPtr == NULL) {
- return;
- }
- for (psPtr = (PatSeq *) Tcl_GetHashValue(hPtr); psPtr != NULL;
- psPtr = nextPtr) {
- nextPtr = psPtr->nextObjPtr;
-
- /*
- * Be sure to remove each binding from its hash chain in the
- * pattern table. If this is the last pattern in the chain,
- * then delete the hash entry too.
- */
-
- prevPtr = (PatSeq *) Tcl_GetHashValue(psPtr->hPtr);
- if (prevPtr == psPtr) {
- if (psPtr->nextSeqPtr == NULL) {
- Tcl_DeleteHashEntry(psPtr->hPtr);
- } else {
- Tcl_SetHashValue(psPtr->hPtr, psPtr->nextSeqPtr);
- }
- } else {
- for ( ; ; prevPtr = prevPtr->nextSeqPtr) {
- if (prevPtr == NULL) {
- panic("Tk_DeleteAllBindings couldn't find on hash chain");
- }
- if (prevPtr->nextSeqPtr == psPtr) {
- prevPtr->nextSeqPtr = psPtr->nextSeqPtr;
- break;
- }
- }
- }
- Tk_EventuallyFree((ClientData) psPtr->command, (Tk_FreeProc *) free);
- ckfree((char *) psPtr);
- }
- Tcl_DeleteHashEntry(hPtr);
- }
-
- /*
- *--------------------------------------------------------------
- *
- * Tk_BindEvent --
- *
- * This procedure is invoked to process an X event. The
- * event is added to those recorded for the binding table.
- * Then each of the objects at *objectPtr is checked in
- * order to see if it has a binding that matches the recent
- * events. If so, that binding is invoked and the rest of
- * objects are skipped.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Depends on the command associated with the matching
- * binding.
- *
- *--------------------------------------------------------------
- */
-
- void
- Tk_BindEvent(bindingTable, eventPtr, tkwin, numObjects, objectPtr)
- Tk_BindingTable bindingTable; /* Table in which to look for
- * bindings. */
- XEvent *eventPtr; /* What actually happened. */
- Tk_Window tkwin; /* Window on display where event
- * occurred (needed in order to
- * locate display information). */
- int numObjects; /* Number of objects at *objectPtr. */
- ClientData *objectPtr; /* Array of one or more objects
- * to check for a matching binding. */
- {
- BindingTable *bindPtr = (BindingTable *) bindingTable;
- TkDisplay *dispPtr = ((TkWindow *) tkwin)->dispPtr;
- XEvent *ringPtr;
- PatSeq *matchPtr;
- PatternTableKey key;
- Tcl_HashEntry *hPtr;
- int detail;
-
- /*
- * Add the new event to the ring of saved events for the
- * binding table. Consecutive MotionNotify events get combined:
- * if both the new event and the previous event are MotionNotify,
- * then put the new event *on top* of the previous event.
- */
-
- if ((eventPtr->type != MotionNotify)
- || (bindPtr->eventRing[bindPtr->curEvent].type != MotionNotify)) {
- bindPtr->curEvent++;
- if (bindPtr->curEvent >= EVENT_BUFFER_SIZE) {
- bindPtr->curEvent = 0;
- }
- }
- ringPtr = &bindPtr->eventRing[bindPtr->curEvent];
- memcpy((VOID *) ringPtr, (VOID *) eventPtr, sizeof(XEvent));
- detail = 0;
- bindPtr->detailRing[bindPtr->curEvent] = 0;
- if ((ringPtr->type == KeyPress) || (ringPtr->type == KeyRelease)) {
- detail = (int) GetKeySym(dispPtr, ringPtr);
- if (detail == NoSymbol) {
- detail = 0;
- }
- } else if ((ringPtr->type == ButtonPress)
- || (ringPtr->type == ButtonRelease)) {
- detail = ringPtr->xbutton.button;
- }
- bindPtr->detailRing[bindPtr->curEvent] = detail;
-
- /*
- * Loop over all the objects, matching the new event against
- * each in turn.
- */
-
- for ( ; numObjects > 0; numObjects--, objectPtr++) {
-
- /*
- * Match the new event against those recorded in the
- * pattern table, saving the longest matching pattern.
- * For events with details (button and key events) first
- * look for a binding for the specific key or button.
- * If none is found, then look for a binding for all
- * keys or buttons (detail of 0).
- */
-
- matchPtr = NULL;
- key.object = *objectPtr;
- key.type = ringPtr->type;
- key.detail = detail;
- hPtr = Tcl_FindHashEntry(&bindPtr->patternTable, (char *) &key);
- if (hPtr != NULL) {
- matchPtr = MatchPatterns(bindPtr,
- (PatSeq *) Tcl_GetHashValue(hPtr));
- }
- if ((detail != 0) && (matchPtr == NULL)) {
- key.detail = 0;
- hPtr = Tcl_FindHashEntry(&bindPtr->patternTable, (char *) &key);
- if (hPtr != NULL) {
- matchPtr = MatchPatterns(bindPtr,
- (PatSeq *) Tcl_GetHashValue(hPtr));
- }
- }
-
- if (matchPtr != NULL) {
-
- /*
- * %-substitution can increase the length of the command.
- * This code handles three cases: (a) no substitution;
- * (b) substitution results in short command (use space
- * on stack); and (c) substitution results in long
- * command (malloc it).
- */
-
- #define STATIC_SPACE 200
- char shortSpace[STATIC_SPACE];
- int result;
-
- if (matchPtr->flags & PAT_PERCENTS) {
- char *p;
-
- p = ExpandPercents(matchPtr->command, eventPtr,
- (KeySym) detail, shortSpace, STATIC_SPACE);
- result = Tcl_GlobalEval(bindPtr->interp, p);
- if (p != shortSpace) {
- ckfree(p);
- }
- } else {
- /*
- * The code below is tricky in order allow the binding to
- * be modified or deleted as part of the command that the
- * binding invokes. Must make sure that the actual command
- * string isn't freed until the command completes, and must
- * copy the address of this string into a local variable
- * in case it's modified by the command.
- */
-
- char *cmd = matchPtr->command;
-
- Tk_Preserve((ClientData) cmd);
- result = Tcl_GlobalEval(bindPtr->interp, cmd);
- Tk_Release((ClientData) cmd);
- }
- if (result != TCL_OK) {
- Tcl_AddErrorInfo(bindPtr->interp,
- "\n (command bound to event)");
- TkBindError(bindPtr->interp);
- }
- return;
- }
- }
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * FindSequence --
- *
- * Find the entry in a binding table that corresponds to a
- * particular pattern string, and return a pointer to that
- * entry.
- *
- * Results:
- * The return value is normally a pointer to the PatSeq
- * in patternTable that corresponds to eventString. If an error
- * was found while parsing eventString, or if "create" is 0 and
- * no pattern sequence previously existed, then NULL is returned
- * and interp->result contains a message describing the problem.
- * If no pattern sequence previously existed for eventString, then
- * a new one is created with a NULL command field. In a successful
- * return, *maskPtr is filled in with a mask of the event types
- * on which the pattern sequence depends.
- *
- * Side effects:
- * A new pattern sequence may be created.
- *
- *----------------------------------------------------------------------
- */
-
- static PatSeq *
- FindSequence(interp, bindPtr, object, eventString, create, maskPtr)
- Tcl_Interp *interp; /* Interpreter to use for error
- * reporting. */
- BindingTable *bindPtr; /* Table to use for lookup. */
- ClientData object; /* Token for object(s) with which binding
- * is associated. */
- char *eventString; /* String description of pattern to
- * match on. See user documentation
- * for details. */
- int create; /* 0 means don't create the entry if
- * it doesn't already exist. Non-zero
- * means create. */
- unsigned long *maskPtr; /* *maskPtr is filled in with the event
- * types on which this pattern sequence
- * depends. */
-
- {
- Pattern pats[EVENT_BUFFER_SIZE];
- int numPats;
- register char *p;
- register Pattern *patPtr;
- register PatSeq *psPtr;
- register Tcl_HashEntry *hPtr;
- #define FIELD_SIZE 20
- char field[FIELD_SIZE];
- int flags, any, count, new, sequenceSize;
- unsigned long eventMask;
- PatternTableKey key;
-
- /*
- *-------------------------------------------------------------
- * Step 1: parse the pattern string to produce an array
- * of Patterns. The array is generated backwards, so
- * that the lowest-indexed pattern corresponds to the last
- * event that must occur.
- *-------------------------------------------------------------
- */
-
- p = eventString;
- flags = 0;
- eventMask = 0;
- for (numPats = 0, patPtr = &pats[EVENT_BUFFER_SIZE-1];
- numPats < EVENT_BUFFER_SIZE;
- numPats++, patPtr--) {
- patPtr->eventType = -1;
- patPtr->needMods = 0;
- patPtr->hateMods = ~0;
- patPtr->detail = 0;
- while (isspace(*p)) {
- p++;
- }
- if (*p == '\0') {
- break;
- }
-
- /*
- * Handle simple ASCII characters. Note: the shift
- * modifier is ignored in this case (it's really part
- * of the character, rather than a "modifier").
- */
-
- if (*p != '<') {
- char string[2];
-
- patPtr->eventType = KeyPress;
- eventMask |= KeyPressMask;
- string[0] = *p;
- string[1] = 0;
- hPtr = Tcl_FindHashEntry(&keySymTable, string);
- if (hPtr != NULL) {
- patPtr->detail = (int) Tcl_GetHashValue(hPtr);
- } else {
- if (isprint(*p)) {
- patPtr->detail = *p;
- } else {
- sprintf(interp->result,
- "bad ASCII character 0x%x", *p);
- return NULL;
- }
- }
- patPtr->hateMods = ~ShiftMask;
- p++;
- continue;
- }
-
- /*
- * A fancier event description. Must consist of
- * 1. open angle bracket.
- * 2. any number of modifiers, each followed by spaces
- * or dashes.
- * 3. an optional event name.
- * 4. an option button or keysym name. Either this or
- * item 3 *must* be present; if both are present
- * then they are separated by spaces or dashes.
- * 5. a close angle bracket.
- */
-
- any = 0;
- count = 1;
- p++;
- while (1) {
- register ModInfo *modPtr;
- p = GetField(p, field, FIELD_SIZE);
- hPtr = Tcl_FindHashEntry(&modTable, field);
- if (hPtr == NULL) {
- break;
- }
- modPtr = (ModInfo *) Tcl_GetHashValue(hPtr);
- patPtr->needMods |= modPtr->mask;
- if (modPtr->flags & (DOUBLE|TRIPLE)) {
- flags |= PAT_NEARBY;
- if (modPtr->flags & DOUBLE) {
- count = 2;
- } else {
- count = 3;
- }
- }
- if (modPtr->flags & ANY) {
- any = 1;
- }
- while ((*p == '-') || isspace(*p)) {
- p++;
- }
- }
- if (any) {
- patPtr->hateMods = 0;
- } else {
- patPtr->hateMods = ~patPtr->needMods;
- }
- hPtr = Tcl_FindHashEntry(&eventTable, field);
- if (hPtr != NULL) {
- register EventInfo *eiPtr;
- eiPtr = (EventInfo *) Tcl_GetHashValue(hPtr);
- patPtr->eventType = eiPtr->type;
- eventMask |= eiPtr->eventMask;
- while ((*p == '-') || isspace(*p)) {
- p++;
- }
- p = GetField(p, field, FIELD_SIZE);
- }
- if (*field != '\0') {
- if ((*field >= '1') && (*field <= '5') && (field[1] == '\0')) {
- static int masks[] = {~0, ~Button1Mask, ~Button2Mask,
- ~Button3Mask, ~Button4Mask, ~Button5Mask};
-
- if (patPtr->eventType == -1) {
- patPtr->eventType = ButtonPress;
- eventMask |= ButtonPressMask;
- } else if ((patPtr->eventType == KeyPress)
- || (patPtr->eventType == KeyRelease)) {
- goto getKeysym;
- } else if ((patPtr->eventType != ButtonPress)
- && (patPtr->eventType != ButtonRelease)) {
- Tcl_AppendResult(interp, "specified button \"", field,
- "\" for non-button event", (char *) NULL);
- return NULL;
- }
- patPtr->detail = (*field - '0');
-
- /*
- * Ignore this button as a modifier: its state is already
- * fixed.
- */
-
- patPtr->needMods &= masks[patPtr->detail];
- patPtr->hateMods &= masks[patPtr->detail];
- } else {
- getKeysym:
- hPtr = Tcl_FindHashEntry(&keySymTable, (char *) field);
- if (hPtr == NULL) {
- Tcl_AppendResult(interp, "bad event type or keysym \"",
- field, "\"", (char *) NULL);
- return NULL;
- }
- if (patPtr->eventType == -1) {
- patPtr->eventType = KeyPress;
- eventMask |= KeyPressMask;
- } else if ((patPtr->eventType != KeyPress)
- && (patPtr->eventType != KeyRelease)) {
- Tcl_AppendResult(interp, "specified keysym \"", field,
- "\" for non-key event", (char *) NULL);
- return NULL;
- }
- patPtr->detail = (int) Tcl_GetHashValue(hPtr);
-
- /*
- * Don't get upset about the shift modifier with keys:
- * if the key doesn't permit the shift modifier then
- * that will already be factored in when translating
- * from keycode to keysym in Tk_BindEvent. If the keysym
- * has both a shifted and unshifted form, we want to allow
- * the shifted form to be specified explicitly, though.
- */
-
- patPtr->hateMods &= ~ShiftMask;
- }
- } else if (patPtr->eventType == -1) {
- interp->result = "no event type or button # or keysym";
- return NULL;
- }
- while ((*p == '-') || isspace(*p)) {
- p++;
- }
- if (*p != '>') {
- interp->result = "missing \">\" in binding";
- return NULL;
- }
- p++;
-
- /*
- * Replicate events for DOUBLE and TRIPLE.
- */
-
- if ((count > 1) && (numPats < EVENT_BUFFER_SIZE-1)) {
- patPtr[-1] = patPtr[0];
- patPtr--;
- numPats++;
- if ((count == 3) && (numPats < EVENT_BUFFER_SIZE-1)) {
- patPtr[-1] = patPtr[0];
- patPtr--;
- numPats++;
- }
- }
- }
-
- /*
- *-------------------------------------------------------------
- * Step 2: find the sequence in the binding table if it exists,
- * and add a new sequence to the table if it doesn't.
- *-------------------------------------------------------------
- */
-
- if (numPats == 0) {
- interp->result = "no events specified in binding";
- return NULL;
- }
- patPtr = &pats[EVENT_BUFFER_SIZE-numPats];
- key.object = object;
- key.type = patPtr->eventType;
- key.detail = patPtr->detail;
- hPtr = Tcl_CreateHashEntry(&bindPtr->patternTable, (char *) &key, &new);
- sequenceSize = numPats*sizeof(Pattern);
- if (!new) {
- for (psPtr = (PatSeq *) Tcl_GetHashValue(hPtr); psPtr != NULL;
- psPtr = psPtr->nextSeqPtr) {
- if ((numPats == psPtr->numPats)
- && ((flags & PAT_NEARBY) == (psPtr->flags & PAT_NEARBY))
- && (memcmp((char *) patPtr, (char *) psPtr->pats,
- sequenceSize) == 0)) {
- goto done;
- }
- }
- }
- if (!create) {
- if (new) {
- Tcl_DeleteHashEntry(hPtr);
- }
- Tcl_AppendResult(interp, "no binding exists for \"",
- eventString, "\"", (char *) NULL);
- return NULL;
- }
- psPtr = (PatSeq *) ckalloc((unsigned) (sizeof(PatSeq)
- + (numPats-1)*sizeof(Pattern)));
- psPtr->numPats = numPats;
- psPtr->command = NULL;
- psPtr->flags = flags;
- psPtr->nextSeqPtr = (PatSeq *) Tcl_GetHashValue(hPtr);
- psPtr->hPtr = hPtr;
- Tcl_SetHashValue(hPtr, psPtr);
-
- /*
- * Link the pattern into the list associated with the object.
- */
-
- psPtr->object = object;
- hPtr = Tcl_CreateHashEntry(&bindPtr->objectTable, (char *) object, &new);
- if (new) {
- psPtr->nextObjPtr = NULL;
- } else {
- psPtr->nextObjPtr = (PatSeq *) Tcl_GetHashValue(hPtr);
- }
- Tcl_SetHashValue(hPtr, psPtr);
-
- memcpy((VOID *) psPtr->pats, (VOID *) patPtr, sequenceSize);
-
- done:
- *maskPtr = eventMask;
- return psPtr;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * GetField --
- *
- * Used to parse pattern descriptions. Copies up to
- * size characters from p to copy, stopping at end of
- * string, space, "-", ">", or whenever size is
- * exceeded.
- *
- * Results:
- * The return value is a pointer to the character just
- * after the last one copied (usually "-" or space or
- * ">", but could be anything if size was exceeded).
- * Also places NULL-terminated string (up to size
- * character, including NULL), at copy.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
- static char *
- GetField(p, copy, size)
- register char *p; /* Pointer to part of pattern. */
- register char *copy; /* Place to copy field. */
- int size; /* Maximum number of characters to
- * copy. */
- {
- while ((*p != '\0') && !isspace(*p) && (*p != '>')
- && (*p != '-') && (size > 1)) {
- *copy = *p;
- p++;
- copy++;
- size--;
- }
- *copy = '\0';
- return p;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * GetKeySym --
- *
- * Given an X KeyPress or KeyRelease event, map the
- * keycode in the event into a KeySym.
- *
- * Results:
- * The return value is the KeySym corresponding to
- * eventPtr, or NoSymbol if no matching Keysym could be
- * found.
- *
- * Side effects:
- * In the first call for a given display, keycode-to-
- * KeySym maps get loaded.
- *
- *----------------------------------------------------------------------
- */
-
- static KeySym
- GetKeySym(dispPtr, eventPtr)
- register TkDisplay *dispPtr; /* Display in which to
- * map keycode. */
- register XEvent *eventPtr; /* Description of X event. */
- {
- KeySym *symPtr;
- KeySym sym;
-
- /*
- * Read the key mapping information from the server if
- * we don't have it already.
- */
-
- if (dispPtr->symsPerCode == 0) {
- dispPtr->firstKeycode = dispPtr->display->min_keycode;
- dispPtr->lastKeycode = dispPtr->display->max_keycode;
- dispPtr->keySyms = XGetKeyboardMapping(dispPtr->display,
- dispPtr->firstKeycode, dispPtr->lastKeycode + 1
- - dispPtr->firstKeycode, &dispPtr->symsPerCode);
- }
-
- /*
- * Compute the lower-case KeySym for this keycode. May
- * have to convert an upper-case KeySym to a lower-case
- * one if the list only has a single element.
- */
-
- if ((eventPtr->xkey.keycode < dispPtr->firstKeycode)
- || (eventPtr->xkey.keycode > dispPtr->lastKeycode)) {
- return NoSymbol;
- }
- symPtr = &dispPtr->keySyms[(eventPtr->xkey.keycode
- - dispPtr->firstKeycode) * dispPtr->symsPerCode];
- sym = *symPtr;
- if ((dispPtr->symsPerCode == 1) || (symPtr[1] == NoSymbol)) {
- if ((sym >= XK_A) && (sym <= XK_Z)) {
- sym += (XK_a - XK_A);
- } else if ((sym >= XK_Agrave) && (sym <= XK_Odiaeresis)) {
- sym += (XK_agrave - XK_Agrave);
- } else if ((sym >= XK_Ooblique) && (sym <= XK_Thorn)) {
- sym += (XK_oslash - XK_Ooblique);
- }
- }
-
- /*
- * See whether the key is shifted or caps-locked. If so,
- * use an upper-case equivalent if provided, or compute
- * one (for caps-lock, just compute upper-case: don't
- * use shifted KeySym since that would shift non-alphabetic
- * keys).
- */
-
- if (eventPtr->xkey.state & ShiftMask) {
- if ((dispPtr->symsPerCode > 1) && (symPtr[1] != NoSymbol)) {
- return symPtr[1];
- }
- shiftToUpper:
- if ((sym >= XK_a) && (sym <= XK_z)) {
- sym += (XK_A - XK_a);
- } else if ((sym >= XK_agrave) && (sym <= XK_adiaeresis)) {
- sym += (XK_Agrave - XK_agrave);
- } else if ((sym >= XK_oslash) && (sym <= XK_thorn)) {
- sym += (XK_Ooblique - XK_oslash);
- }
- return sym;
- }
- if (eventPtr->xkey.state & LockMask) {
- goto shiftToUpper;
- }
- return sym;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * MatchPatterns --
- *
- * Given a list of pattern sequences and a list of
- * recent events, return a pattern sequence that matches
- * the event list.
- *
- * Results:
- * The return value is NULL if no pattern matches the
- * recent events from bindPtr. If one or more patterns
- * matches, then the longest (or most specific) matching
- * pattern is returned.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
- static PatSeq *
- MatchPatterns(bindPtr, psPtr)
- BindingTable *bindPtr; /* Information about binding table, such
- * as ring of recent events. */
- register PatSeq *psPtr; /* List of pattern sequences. */
- {
- register PatSeq *bestPtr = NULL;
-
- /*
- * Iterate over all the pattern sequences.
- */
-
- for ( ; psPtr != NULL; psPtr = psPtr->nextSeqPtr) {
- register XEvent *eventPtr;
- register Pattern *patPtr;
- Window window;
- int *detailPtr;
- int patCount, ringCount, flags, state;
-
- /*
- * Iterate over all the patterns in a sequence to be
- * sure that they all match.
- */
-
- eventPtr = &bindPtr->eventRing[bindPtr->curEvent];
- detailPtr = &bindPtr->detailRing[bindPtr->curEvent];
- window = eventPtr->xany.window;
- patPtr = psPtr->pats;
- patCount = psPtr->numPats;
- ringCount = EVENT_BUFFER_SIZE;
- while (patCount > 0) {
- if (ringCount <= 0) {
- goto nextSequence;
- }
- if (eventPtr->xany.window != window) {
- goto nextSequence;
- }
- if (eventPtr->xany.type != patPtr->eventType) {
- /*
- * If the event is a mouse motion, button release,
- * or key release event, and it didn't match
- * the pattern, then just skip the event and try
- * the next event against the same pattern.
- */
-
- if ((eventPtr->xany.type == MotionNotify)
- || (eventPtr->xany.type == ButtonRelease)
- || (eventPtr->xany.type == KeyRelease)
- || (eventPtr->xany.type == NoExpose)
- || (eventPtr->xany.type == GraphicsExpose)) {
- goto nextEvent;
- }
- goto nextSequence;
- }
-
- flags = flagArray[eventPtr->type];
- if (flags & KEY_BUTTON_MOTION) {
- state = eventPtr->xkey.state;
- } else if (flags & CROSSING) {
- state = eventPtr->xcrossing.state;
- } else {
- state = 0;
- }
- if ((state & patPtr->needMods)
- != patPtr->needMods) {
- goto nextSequence;
- }
- if ((state & patPtr->hateMods) != 0) {
- goto nextSequence;
- }
- if ((patPtr->detail != 0)
- && (patPtr->detail != *detailPtr)) {
- goto nextSequence;
- }
- if (psPtr->flags & PAT_NEARBY) {
- register XEvent *firstPtr;
-
- firstPtr = &bindPtr->eventRing[bindPtr->curEvent];
- if ((firstPtr->xkey.x_root
- < (eventPtr->xkey.x_root - NEARBY_PIXELS))
- || (firstPtr->xkey.x_root
- > (eventPtr->xkey.x_root + NEARBY_PIXELS))
- || (firstPtr->xkey.y_root
- < (eventPtr->xkey.y_root - NEARBY_PIXELS))
- || (firstPtr->xkey.y_root
- > (eventPtr->xkey.y_root + NEARBY_PIXELS))
- || (firstPtr->xkey.time
- > (eventPtr->xkey.time + NEARBY_MS))) {
- goto nextSequence;
- }
- }
- patPtr++;
- patCount--;
- nextEvent:
- if (eventPtr == bindPtr->eventRing) {
- eventPtr = &bindPtr->eventRing[EVENT_BUFFER_SIZE-1];
- detailPtr = &bindPtr->detailRing[EVENT_BUFFER_SIZE-1];
- } else {
- eventPtr--;
- detailPtr--;
- }
- ringCount--;
- }
-
- /*
- * This sequence matches. If we've already got another match,
- * pick whichever is most specific. Detail is most important,
- * then needMods, then hateMods.
- */
-
- if (bestPtr != NULL) {
- register Pattern *patPtr2;
- int i;
-
- if (psPtr->numPats != bestPtr->numPats) {
- if (bestPtr->numPats > psPtr->numPats) {
- goto nextSequence;
- } else {
- goto newBest;
- }
- }
- for (i = 0, patPtr = psPtr->pats, patPtr2 = bestPtr->pats;
- i < psPtr->numPats; i++,patPtr++, patPtr2++) {
- if (patPtr->detail != patPtr2->detail) {
- if (patPtr->detail == 0) {
- goto nextSequence;
- } else {
- goto newBest;
- }
- }
- if (patPtr->needMods != patPtr2->needMods) {
- if ((patPtr->needMods & patPtr2->needMods)
- == patPtr->needMods) {
- goto nextSequence;
- } else {
- goto newBest;
- }
- }
- if (patPtr->hateMods != patPtr2->hateMods) {
- if ((patPtr->hateMods & patPtr2->hateMods)
- == patPtr2->hateMods) {
- goto newBest;
- } else {
- goto nextSequence;
- }
- }
- }
- goto nextSequence; /* Tie goes to newest pattern. */
- }
- newBest:
- bestPtr = psPtr;
-
- nextSequence: continue;
- }
- return bestPtr;
- }
-
- /*
- *--------------------------------------------------------------
- *
- * ExpandPercents --
- *
- * Given a command and an event, produce a new command
- * by replacing % constructs in the original command
- * with information from the X event.
- *
- * Results:
- * The return result is a pointer to the new %-substituted
- * command. If the command fits in the space at after, then
- * the return value is after. If the command is too large
- * to fit at after, then the return value is a pointer to
- * a malloc-ed buffer holding the command; in this case it
- * is the caller's responsibility to free up the buffer when
- * finished with it.
- *
- * Side effects:
- * None.
- *
- *--------------------------------------------------------------
- */
-
- static char *
- ExpandPercents(before, eventPtr, keySym, after, afterSize)
- register char *before; /* Command containing percent
- * expressions to be replaced. */
- register XEvent *eventPtr; /* X event containing information
- * to be used in % replacements. */
- KeySym keySym; /* KeySym: only relevant for
- * KeyPress and KeyRelease events). */
- char *after; /* Place to generate new expanded
- * command. Must contain at least
- * "afterSize" bytes of space. */
- int afterSize; /* Number of bytes of space available at
- * after. */
- {
- register char *buffer; /* Pointer to buffer currently being used
- * as destination. */
- register char *dst; /* Pointer to next place to store character
- * in substituted string. */
- int spaceLeft; /* Indicates how many more non-null bytes
- * may be stored at *dst before space
- * runs out. */
- int spaceNeeded, cvtFlags; /* Used to substitute string as proper Tcl
- * list element. */
- int number, flags;
- #define NUM_SIZE 40
- register char *string;
- char numStorage[NUM_SIZE+1];
-
- if (eventPtr->type < LASTEvent) {
- flags = flagArray[eventPtr->type];
- } else {
- flags = 0;
- }
- dst = buffer = after;
- spaceLeft = afterSize - 1;
- while (*before != 0) {
- if (*before != '%') {
-
- /*
- * Expand the destination string if necessary.
- */
-
- if (spaceLeft <= 0) {
- char *newSpace;
-
- newSpace = (char *) ckalloc((unsigned) (2*afterSize));
- memcpy((VOID *) newSpace, (VOID *) buffer, afterSize);
- afterSize *= 2;
- dst = newSpace + (dst - buffer);
- if (buffer != after) {
- ckfree(buffer);
- }
- buffer = newSpace;
- spaceLeft = afterSize - (dst-buffer) - 1;
- }
- *dst = *before;
- dst++;
- before++;
- spaceLeft--;
- continue;
- }
-
- number = 0;
- string = "??";
- switch (before[1]) {
- case '#':
- number = eventPtr->xany.serial;
- goto doNumber;
- case 'a':
- number = (int) eventPtr->xconfigure.above;
- goto doNumber;
- case 'b':
- number = eventPtr->xbutton.button;
- goto doNumber;
- case 'c':
- if (flags & EXPOSE) {
- number = eventPtr->xexpose.count;
- } else if (flags & MAPPING) {
- number = eventPtr->xmapping.count;
- }
- goto doNumber;
- case 'd':
- if (flags & (CROSSING|FOCUS)) {
- switch (eventPtr->xcrossing.detail) {
- case NotifyAncestor:
- string = "NotifyAncestor";
- break;
- case NotifyVirtual:
- string = "NotifyVirtual";
- break;
- case NotifyInferior:
- string = "NotifyInferior";
- break;
- case NotifyNonlinear:
- string = "NotifyNonlinear";
- break;
- case NotifyNonlinearVirtual:
- string = "NotifyNonlinearVirtual";
- break;
- case NotifyPointer:
- string = "NotifyPointer";
- break;
- case NotifyPointerRoot:
- string = "NotifyPointerRoot";
- break;
- case NotifyDetailNone:
- string = "NotifyDetailNone";
- break;
- }
- } else if (flags & CONFIG_REQ) {
- switch (eventPtr->xconfigurerequest.detail) {
- case Above:
- string = "Above";
- break;
- case Below:
- string = "Below";
- break;
- case TopIf:
- string = "TopIf";
- break;
- case BottomIf:
- string = "BottomIf";
- break;
- case Opposite:
- string = "Opposite";
- break;
- }
- }
- goto doString;
- case 'f':
- number = eventPtr->xcrossing.focus;
- goto doNumber;
- case 'h':
- if (flags & EXPOSE) {
- number = eventPtr->xexpose.height;
- } else if (flags & (CONFIG|CONFIG_REQ)) {
- number = eventPtr->xconfigure.height;
- } else if (flags & RESIZE_REQ) {
- number = eventPtr->xresizerequest.height;
- }
- goto doNumber;
- case 'k':
- number = eventPtr->xkey.keycode;
- goto doNumber;
- case 'm':
- if (flags & CROSSING) {
- number = eventPtr->xcrossing.mode;
- } else if (flags & FOCUS) {
- number = eventPtr->xfocus.mode;
- }
- switch (number) {
- case NotifyNormal:
- string = "NotifyNormal";
- break;
- case NotifyGrab:
- string = "NotifyGrab";
- break;
- case NotifyUngrab:
- string = "NotifyUngrab";
- break;
- case NotifyWhileGrabbed:
- string = "NotifyWhileGrabbed";
- break;
- }
- goto doString;
- case 'o':
- if (flags & CREATE) {
- number = eventPtr->xcreatewindow.override_redirect;
- } else if (flags & MAP) {
- number = eventPtr->xmap.override_redirect;
- } else if (flags & REPARENT) {
- number = eventPtr->xreparent.override_redirect;
- } else if (flags & CONFIG) {
- number = eventPtr->xconfigure.override_redirect;
- }
- goto doNumber;
- case 'p':
- switch (eventPtr->xcirculate.place) {
- case PlaceOnTop:
- string = "PlaceOnTop";
- break;
- case PlaceOnBottom:
- string = "PlaceOnBottom";
- break;
- }
- goto doString;
- case 's':
- if (flags & KEY_BUTTON_MOTION) {
- number = eventPtr->xkey.state;
- } else if (flags & CROSSING) {
- number = eventPtr->xcrossing.state;
- } else if (flags & VISIBILITY) {
- switch (eventPtr->xvisibility.state) {
- case VisibilityUnobscured:
- string = "VisibilityUnobscured";
- break;
- case VisibilityPartiallyObscured:
- string = "VisibilityPartiallyObscured";
- break;
- case VisibilityFullyObscured:
- string = "VisibilityFullyObscured";
- break;
- }
- goto doString;
- }
- goto doNumber;
- case 't':
- if (flags & (KEY_BUTTON_MOTION|PROP|SEL_CLEAR)) {
- number = (int) eventPtr->xkey.time;
- } else if (flags & SEL_REQ) {
- number = (int) eventPtr->xselectionrequest.time;
- } else if (flags & SEL_NOTIFY) {
- number = (int) eventPtr->xselection.time;
- }
- goto doNumber;
- case 'v':
- number = eventPtr->xconfigurerequest.value_mask;
- goto doNumber;
- case 'w':
- if (flags & EXPOSE) {
- number = eventPtr->xexpose.width;
- } else if (flags & (CONFIG|CONFIG_REQ)) {
- number = eventPtr->xconfigure.width;
- } else if (flags & RESIZE_REQ) {
- number = eventPtr->xresizerequest.width;
- }
- goto doNumber;
- case 'x':
- if (flags & KEY_BUTTON_MOTION) {
- number = eventPtr->xkey.x;
- } else if (flags & EXPOSE) {
- number = eventPtr->xexpose.x;
- } else if (flags & (CREATE|CONFIG|GRAVITY|CONFIG_REQ)) {
- number = eventPtr->xcreatewindow.x;
- } else if (flags & REPARENT) {
- number = eventPtr->xreparent.x;
- } else if (flags & CROSSING) {
- number = eventPtr->xcrossing.x;
- }
- goto doNumber;
- case 'y':
- if (flags & KEY_BUTTON_MOTION) {
- number = eventPtr->xkey.y;
- } else if (flags & EXPOSE) {
- number = eventPtr->xexpose.y;
- } else if (flags & (CREATE|CONFIG|GRAVITY|CONFIG_REQ)) {
- number = eventPtr->xcreatewindow.y;
- } else if (flags & REPARENT) {
- number = eventPtr->xreparent.y;
- } else if (flags & CROSSING) {
- number = eventPtr->xcrossing.y;
-
- }
- goto doNumber;
- case 'A':
- if ((eventPtr->type == KeyPress)
- || (eventPtr->type == KeyRelease)) {
- int numChars;
-
- numChars = XLookupString(&eventPtr->xkey, numStorage,
- NUM_SIZE, (KeySym *) NULL,
- (XComposeStatus *) NULL);
- numStorage[numChars] = '\0';
- string = numStorage;
- }
- goto doString;
- case 'B':
- number = eventPtr->xcreatewindow.border_width;
- goto doNumber;
- case 'D':
- number = (int) eventPtr->xany.display;
- goto doNumber;
- case 'E':
- number = (int) eventPtr->xany.send_event;
- goto doNumber;
- case 'K':
- if ((eventPtr->type == KeyPress)
- || (eventPtr->type == KeyRelease)) {
- register KeySymInfo *kPtr;
-
- for (kPtr = keyArray; kPtr->name != NULL; kPtr++) {
- if (kPtr->value == keySym) {
- string = kPtr->name;
- break;
- }
- }
- }
- goto doString;
- case 'N':
- number = (int) keySym;
- goto doNumber;
- case 'R':
- number = (int) eventPtr->xkey.root;
- goto doNumber;
- case 'S':
- number = (int) eventPtr->xkey.subwindow;
- goto doNumber;
- case 'T':
- number = eventPtr->type;
- goto doNumber;
- case 'W': {
- TkWindow *winPtr;
-
- if (XFindContext(eventPtr->xany.display, eventPtr->xany.window,
- tkWindowContext, (caddr_t *) &winPtr) == 0) {
- string = winPtr->pathName;
- } else {
- string = "??";
- }
- goto doString;
- }
- case 'X':
- number = eventPtr->xkey.x_root;
- goto doNumber;
- case 'Y':
- number = eventPtr->xkey.y_root;
- goto doNumber;
- default:
- numStorage[0] = before[1];
- numStorage[1] = '\0';
- string = numStorage;
- goto doString;
- }
-
- doNumber:
- sprintf(numStorage, "%d", number);
- string = numStorage;
-
- doString:
- spaceNeeded = Tcl_ScanElement(string, &cvtFlags);
- if (spaceNeeded >= spaceLeft) {
- char *newSpace;
-
- newSpace = (char *) ckalloc((unsigned)
- (afterSize + spaceNeeded + 50));
- memcpy((VOID *) newSpace, (VOID *) buffer, afterSize);
- afterSize += spaceNeeded + 50;
- dst = newSpace + (dst - buffer);
- if (buffer != after) {
- ckfree(buffer);
- }
- buffer = newSpace;
- spaceLeft = afterSize - (dst-buffer) - 1;
- }
- spaceNeeded = Tcl_ConvertElement(string, dst,
- cvtFlags | TCL_DONT_USE_BRACES);
- dst += spaceNeeded;
- spaceLeft -= spaceNeeded;
- before += 2;
- }
- *dst = '\0';
- return buffer;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * TkBindError --
- *
- * This procedure is invoked to handle errors that occur in Tcl
- * commands that are invoked in "background" (e.g. from event or
- * timer bindings).
- *
- * Results:
- * None.
- *
- * Side effects:
- * The command "tkerror" is invoked to process the error, passing
- * it the error message. If that fails, then an error message
- * is output on stderr.
- *
- *----------------------------------------------------------------------
- */
-
- void
- TkBindError(interp)
- Tcl_Interp *interp; /* Interpreter in which an error has
- * occurred. */
- {
- char *argv[2];
- char *command;
- char *error;
- char *errorInfo, *tmp;
- int result;
-
- error = (char *) ckalloc((unsigned) (strlen(interp->result) + 1));
- strcpy(error, interp->result);
- tmp = Tcl_GetVar(interp, "errorInfo", TCL_GLOBAL_ONLY);
- if (tmp == NULL) {
- errorInfo = error;
- } else {
- errorInfo = (char *) ckalloc((unsigned) (strlen(tmp) + 1));
- strcpy(errorInfo, tmp);
- }
- argv[0] = "tkerror";
- argv[1] = error;
- command = Tcl_Merge(2, argv);
- result = Tcl_GlobalEval(interp, command);
- if (result != TCL_OK) {
- if (strcmp(interp->result, "\"tkerror\" is an invalid command name or ambiguous abbreviation") == 0) {
- fprintf(stderr, "%s\n", errorInfo);
- } else {
- fprintf(stderr, "tkerror failed to handle background error.\n");
- fprintf(stderr, " Original error: %s\n", error);
- fprintf(stderr, " Error in tkerror: %s\n", interp->result);
- }
- }
- Tcl_ResetResult(interp);
- ckfree(command);
- ckfree(error);
- if (errorInfo != error) {
- ckfree(errorInfo);
- }
- }
-