--- /dev/null
+/*
+ * tkGet.c --
+ *
+ * This file contains a number of "Tk_GetXXX" procedures, which parse
+ * text strings into useful forms for Tk. This file has the simpler
+ * functions, like Tk_GetDirection and Tk_GetUid. The more complex
+ * functions like Tk_GetColor are in separate files.
+ *
+ * Copyright (c) 1991-1994 The Regents of the University of California.
+ * Copyright (c) 1994-1997 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution of
+ * this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ */
+
+#include "tkInt.h"
+
+/*
+ * One of these structures is created per thread to store thread-specific
+ * data. In this case, it is used to house the Tk_Uid structs used by each
+ * thread. The "dataKey" below is used to locate the ThreadSpecificData for
+ * the current thread.
+ */
+
+typedef struct {
+ int initialized;
+ Tcl_HashTable uidTable;
+} ThreadSpecificData;
+static Tcl_ThreadDataKey dataKey;
+
+static void FreeUidThreadExitProc(ClientData clientData);
+
+/*
+ * The following tables defines the string values for reliefs, which are
+ * used by Tk_GetAnchorFromObj and Tk_GetJustifyFromObj.
+ */
+
+static const char *const anchorStrings[] = {
+ "n", "ne", "e", "se", "s", "sw", "w", "nw", "center", NULL
+};
+static const char *const justifyStrings[] = {
+ "left", "right", "center", NULL
+};
+\f
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tk_GetAnchorFromObj --
+ *
+ * Return a Tk_Anchor value based on the value of the objPtr.
+ *
+ * Results:
+ * The return value is a standard Tcl result. If an error occurs during
+ * conversion, an error message is left in the interpreter's result
+ * unless "interp" is NULL.
+ *
+ * Side effects:
+ * The object gets converted by Tcl_GetIndexFromObj.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+Tk_GetAnchorFromObj(
+ Tcl_Interp *interp, /* Used for error reporting. */
+ Tcl_Obj *objPtr, /* The object we are trying to get the value
+ * from. */
+ Tk_Anchor *anchorPtr) /* Where to place the Tk_Anchor that
+ * corresponds to the string value of
+ * objPtr. */
+{
+ int index, code;
+
+ code = Tcl_GetIndexFromObj(interp, objPtr, anchorStrings, "anchor", 0,
+ &index);
+ if (code == TCL_OK) {
+ *anchorPtr = (Tk_Anchor) index;
+ }
+ return code;
+}
+\f
+/*
+ *--------------------------------------------------------------
+ *
+ * Tk_GetAnchor --
+ *
+ * Given a string, return the corresponding Tk_Anchor.
+ *
+ * Results:
+ * The return value is a standard Tcl return result. If TCL_OK is
+ * returned, then everything went well and the position is stored at
+ * *anchorPtr; otherwise TCL_ERROR is returned and an error message is
+ * left in the interp's result.
+ *
+ * Side effects:
+ * None.
+ *
+ *--------------------------------------------------------------
+ */
+
+int
+Tk_GetAnchor(
+ Tcl_Interp *interp, /* Use this for error reporting. */
+ const char *string, /* String describing a direction. */
+ Tk_Anchor *anchorPtr) /* Where to store Tk_Anchor corresponding to
+ * string. */
+{
+ switch (string[0]) {
+ case 'n':
+ if (string[1] == 0) {
+ *anchorPtr = TK_ANCHOR_N;
+ return TCL_OK;
+ } else if ((string[1] == 'e') && (string[2] == 0)) {
+ *anchorPtr = TK_ANCHOR_NE;
+ return TCL_OK;
+ } else if ((string[1] == 'w') && (string[2] == 0)) {
+ *anchorPtr = TK_ANCHOR_NW;
+ return TCL_OK;
+ }
+ goto error;
+ case 's':
+ if (string[1] == 0) {
+ *anchorPtr = TK_ANCHOR_S;
+ return TCL_OK;
+ } else if ((string[1] == 'e') && (string[2] == 0)) {
+ *anchorPtr = TK_ANCHOR_SE;
+ return TCL_OK;
+ } else if ((string[1] == 'w') && (string[2] == 0)) {
+ *anchorPtr = TK_ANCHOR_SW;
+ return TCL_OK;
+ } else {
+ goto error;
+ }
+ case 'e':
+ if (string[1] == 0) {
+ *anchorPtr = TK_ANCHOR_E;
+ return TCL_OK;
+ }
+ goto error;
+ case 'w':
+ if (string[1] == 0) {
+ *anchorPtr = TK_ANCHOR_W;
+ return TCL_OK;
+ }
+ goto error;
+ case 'c':
+ if (strncmp(string, "center", strlen(string)) == 0) {
+ *anchorPtr = TK_ANCHOR_CENTER;
+ return TCL_OK;
+ }
+ goto error;
+ }
+
+ error:
+ Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+ "bad anchor position \"%s\": must be"
+ " n, ne, e, se, s, sw, w, nw, or center", string));
+ Tcl_SetErrorCode(interp, "TK", "VALUE", "ANCHOR", NULL);
+ return TCL_ERROR;
+}
+\f
+/*
+ *--------------------------------------------------------------
+ *
+ * Tk_NameOfAnchor --
+ *
+ * Given a Tk_Anchor, return the string that corresponds to it.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * None.
+ *
+ *--------------------------------------------------------------
+ */
+
+const char *
+Tk_NameOfAnchor(
+ Tk_Anchor anchor) /* Anchor for which identifying string is
+ * desired. */
+{
+ switch (anchor) {
+ case TK_ANCHOR_N: return "n";
+ case TK_ANCHOR_NE: return "ne";
+ case TK_ANCHOR_E: return "e";
+ case TK_ANCHOR_SE: return "se";
+ case TK_ANCHOR_S: return "s";
+ case TK_ANCHOR_SW: return "sw";
+ case TK_ANCHOR_W: return "w";
+ case TK_ANCHOR_NW: return "nw";
+ case TK_ANCHOR_CENTER: return "center";
+ }
+ return "unknown anchor position";
+}
+\f
+/*
+ *--------------------------------------------------------------
+ *
+ * Tk_GetJoinStyle --
+ *
+ * Given a string, return the corresponding Tk JoinStyle.
+ *
+ * Results:
+ * The return value is a standard Tcl return result. If TCL_OK is
+ * returned, then everything went well and the justification is stored at
+ * *joinPtr; otherwise TCL_ERROR is returned and an error message is left
+ * in the interp's result.
+ *
+ * Side effects:
+ * None.
+ *
+ *--------------------------------------------------------------
+ */
+
+int
+Tk_GetJoinStyle(
+ Tcl_Interp *interp, /* Use this for error reporting. */
+ const char *string, /* String describing a justification style. */
+ int *joinPtr) /* Where to store join style corresponding to
+ * string. */
+{
+ int c;
+ size_t length;
+
+ c = string[0];
+ length = strlen(string);
+
+ if ((c == 'b') && (strncmp(string, "bevel", length) == 0)) {
+ *joinPtr = JoinBevel;
+ return TCL_OK;
+ }
+ if ((c == 'm') && (strncmp(string, "miter", length) == 0)) {
+ *joinPtr = JoinMiter;
+ return TCL_OK;
+ }
+ if ((c == 'r') && (strncmp(string, "round", length) == 0)) {
+ *joinPtr = JoinRound;
+ return TCL_OK;
+ }
+
+ Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+ "bad join style \"%s\": must be bevel, miter, or round",
+ string));
+ Tcl_SetErrorCode(interp, "TK", "VALUE", "JOIN", NULL);
+ return TCL_ERROR;
+}
+\f
+/*
+ *--------------------------------------------------------------
+ *
+ * Tk_NameOfJoinStyle --
+ *
+ * Given a Tk JoinStyle, return the string that corresponds to it.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * None.
+ *
+ *--------------------------------------------------------------
+ */
+
+const char *
+Tk_NameOfJoinStyle(
+ int join) /* Join style for which identifying string is
+ * desired. */
+{
+ switch (join) {
+ case JoinBevel: return "bevel";
+ case JoinMiter: return "miter";
+ case JoinRound: return "round";
+ }
+ return "unknown join style";
+}
+\f
+/*
+ *--------------------------------------------------------------
+ *
+ * Tk_GetCapStyle --
+ *
+ * Given a string, return the corresponding Tk CapStyle.
+ *
+ * Results:
+ * The return value is a standard Tcl return result. If TCL_OK is
+ * returned, then everything went well and the justification is stored at
+ * *capPtr; otherwise TCL_ERROR is returned and an error message is left
+ * in the interp's result.
+ *
+ * Side effects:
+ * None.
+ *
+ *--------------------------------------------------------------
+ */
+
+int
+Tk_GetCapStyle(
+ Tcl_Interp *interp, /* Use this for error reporting. */
+ const char *string, /* String describing a justification style. */
+ int *capPtr) /* Where to store cap style corresponding to
+ * string. */
+{
+ int c;
+ size_t length;
+
+ c = string[0];
+ length = strlen(string);
+
+ if ((c == 'b') && (strncmp(string, "butt", length) == 0)) {
+ *capPtr = CapButt;
+ return TCL_OK;
+ }
+ if ((c == 'p') && (strncmp(string, "projecting", length) == 0)) {
+ *capPtr = CapProjecting;
+ return TCL_OK;
+ }
+ if ((c == 'r') && (strncmp(string, "round", length) == 0)) {
+ *capPtr = CapRound;
+ return TCL_OK;
+ }
+
+ Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+ "bad cap style \"%s\": must be butt, projecting, or round",
+ string));
+ Tcl_SetErrorCode(interp, "TK", "VALUE", "CAP", NULL);
+ return TCL_ERROR;
+}
+\f
+/*
+ *--------------------------------------------------------------
+ *
+ * Tk_NameOfCapStyle --
+ *
+ * Given a Tk CapStyle, return the string that corresponds to it.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * None.
+ *
+ *--------------------------------------------------------------
+ */
+
+const char *
+Tk_NameOfCapStyle(
+ int cap) /* Cap style for which identifying string is
+ * desired. */
+{
+ switch (cap) {
+ case CapButt: return "butt";
+ case CapProjecting: return "projecting";
+ case CapRound: return "round";
+ }
+ return "unknown cap style";
+}
+\f
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tk_GetJustifyFromObj --
+ *
+ * Return a Tk_Justify value based on the value of the objPtr.
+ *
+ * Results:
+ * The return value is a standard Tcl result. If an error occurs during
+ * conversion, an error message is left in the interpreter's result
+ * unless "interp" is NULL.
+ *
+ * Side effects:
+ * The object gets converted by Tcl_GetIndexFromObj.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+Tk_GetJustifyFromObj(
+ Tcl_Interp *interp, /* Used for error reporting. */
+ Tcl_Obj *objPtr, /* The object we are trying to get the value
+ * from. */
+ Tk_Justify *justifyPtr) /* Where to place the Tk_Justify that
+ * corresponds to the string value of
+ * objPtr. */
+{
+ int index, code;
+
+ code = Tcl_GetIndexFromObj(interp, objPtr, justifyStrings,
+ "justification", 0, &index);
+ if (code == TCL_OK) {
+ *justifyPtr = (Tk_Justify) index;
+ }
+ return code;
+}
+\f
+/*
+ *--------------------------------------------------------------
+ *
+ * Tk_GetJustify --
+ *
+ * Given a string, return the corresponding Tk_Justify.
+ *
+ * Results:
+ * The return value is a standard Tcl return result. If TCL_OK is
+ * returned, then everything went well and the justification is stored at
+ * *justifyPtr; otherwise TCL_ERROR is returned and an error message is
+ * left in the interp's result.
+ *
+ * Side effects:
+ * None.
+ *
+ *--------------------------------------------------------------
+ */
+
+int
+Tk_GetJustify(
+ Tcl_Interp *interp, /* Use this for error reporting. */
+ const char *string, /* String describing a justification style. */
+ Tk_Justify *justifyPtr) /* Where to store Tk_Justify corresponding to
+ * string. */
+{
+ int c;
+ size_t length;
+
+ c = string[0];
+ length = strlen(string);
+
+ if ((c == 'l') && (strncmp(string, "left", length) == 0)) {
+ *justifyPtr = TK_JUSTIFY_LEFT;
+ return TCL_OK;
+ }
+ if ((c == 'r') && (strncmp(string, "right", length) == 0)) {
+ *justifyPtr = TK_JUSTIFY_RIGHT;
+ return TCL_OK;
+ }
+ if ((c == 'c') && (strncmp(string, "center", length) == 0)) {
+ *justifyPtr = TK_JUSTIFY_CENTER;
+ return TCL_OK;
+ }
+
+ Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+ "bad justification \"%s\": must be left, right, or center",
+ string));
+ Tcl_SetErrorCode(interp, "TK", "VALUE", "JUSTIFY", NULL);
+ return TCL_ERROR;
+}
+\f
+/*
+ *--------------------------------------------------------------
+ *
+ * Tk_NameOfJustify --
+ *
+ * Given a Tk_Justify, return the string that corresponds
+ * to it.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * None.
+ *
+ *--------------------------------------------------------------
+ */
+
+const char *
+Tk_NameOfJustify(
+ Tk_Justify justify) /* Justification style for which identifying
+ * string is desired. */
+{
+ switch (justify) {
+ case TK_JUSTIFY_LEFT: return "left";
+ case TK_JUSTIFY_RIGHT: return "right";
+ case TK_JUSTIFY_CENTER: return "center";
+ }
+ return "unknown justification style";
+}
+\f
+/*
+ *----------------------------------------------------------------------
+ *
+ * FreeUidThreadExitProc --
+ *
+ * Cleans up memory used for Tk_Uids in the thread.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * All information in the identifier table is deleted.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+FreeUidThreadExitProc(
+ TCL_UNUSED(void *))
+{
+ ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
+ Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
+
+ Tcl_DeleteHashTable(&tsdPtr->uidTable);
+ tsdPtr->initialized = 0;
+}
+\f
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tk_GetUid --
+ *
+ * Given a string, this function returns a unique identifier for the
+ * string.
+ *
+ * Results:
+ * This function returns a Tk_Uid corresponding to the "string" argument.
+ * The Tk_Uid has a string value identical to string (strcmp will return
+ * 0), but it's guaranteed that any other calls to this function with a
+ * string equal to "string" will return exactly the same result (i.e. can
+ * compare Tk_Uid *values* directly, without having to call strcmp on
+ * what they point to).
+ *
+ * Side effects:
+ * New information may be entered into the identifier table.
+ *
+ *----------------------------------------------------------------------
+ */
+
+Tk_Uid
+Tk_GetUid(
+ const char *string) /* String to convert. */
+{
+ int dummy;
+ ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
+ Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
+ Tcl_HashTable *tablePtr = &tsdPtr->uidTable;
+
+ if (!tsdPtr->initialized) {
+ Tcl_InitHashTable(tablePtr, TCL_STRING_KEYS);
+ Tcl_CreateThreadExitHandler(FreeUidThreadExitProc, NULL);
+ tsdPtr->initialized = 1;
+ }
+ return (Tk_Uid) Tcl_GetHashKey(tablePtr,
+ Tcl_CreateHashEntry(tablePtr, string, &dummy));
+}
+\f
+/*
+ *--------------------------------------------------------------
+ *
+ * Tk_GetScreenMM --
+ *
+ * Given a string, returns the number of screen millimeters corresponding
+ * to that string.
+ *
+ * Results:
+ * The return value is a standard Tcl return result. If TCL_OK is
+ * returned, then everything went well and the screen distance is stored
+ * at *doublePtr; otherwise TCL_ERROR is returned and an error message is
+ * left in the interp's result.
+ *
+ * Side effects:
+ * None.
+ *
+ *--------------------------------------------------------------
+ */
+
+int
+Tk_GetScreenMM(
+ Tcl_Interp *interp, /* Use this for error reporting. */
+ Tk_Window tkwin, /* Window whose screen determines conversion
+ * from centimeters and other absolute
+ * units. */
+ const char *string, /* String describing a screen distance. */
+ double *doublePtr) /* Place to store converted result. */
+{
+ char *end;
+ double d;
+
+ d = strtod(string, &end);
+ if (end == string) {
+ goto error;
+ }
+ while ((*end != '\0') && isspace(UCHAR(*end))) {
+ end++;
+ }
+ switch (*end) {
+ case 0:
+ d /= WidthOfScreen(Tk_Screen(tkwin));
+ d *= WidthMMOfScreen(Tk_Screen(tkwin));
+ break;
+ case 'c':
+ d *= 10;
+ end++;
+ break;
+ case 'i':
+ d *= 25.4;
+ end++;
+ break;
+ case 'm':
+ end++;
+ break;
+ case 'p':
+ d *= 25.4/72.0;
+ end++;
+ break;
+ default:
+ goto error;
+ }
+ while ((*end != '\0') && isspace(UCHAR(*end))) {
+ end++;
+ }
+ if (*end != 0) {
+ goto error;
+ }
+ *doublePtr = d;
+ return TCL_OK;
+
+ error:
+ Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+ "bad screen distance \"%s\"", string));
+ Tcl_SetErrorCode(interp, "TK", "VALUE", "SCREEN_DISTANCE", NULL);
+ return TCL_ERROR;
+}
+\f
+/*
+ *--------------------------------------------------------------
+ *
+ * Tk_GetPixels --
+ *
+ * Given a string, returns the number of pixels corresponding to that
+ * string.
+ *
+ * Results:
+ * The return value is a standard Tcl return result. If TCL_OK is
+ * returned, then everything went well and the rounded pixel distance is
+ * stored at *intPtr; otherwise TCL_ERROR is returned and an error
+ * message is left in the interp's result.
+ *
+ * Side effects:
+ * None.
+ *
+ *--------------------------------------------------------------
+ */
+
+int
+Tk_GetPixels(
+ Tcl_Interp *interp, /* Use this for error reporting. */
+ Tk_Window tkwin, /* Window whose screen determines conversion
+ * from centimeters and other absolute
+ * units. */
+ const char *string, /* String describing a number of pixels. */
+ int *intPtr) /* Place to store converted result. */
+{
+ double d;
+
+ if (TkGetDoublePixels(interp, tkwin, string, &d) != TCL_OK) {
+ return TCL_ERROR;
+ }
+
+ if (d < 0) {
+ *intPtr = (int) (d - 0.5);
+ } else {
+ *intPtr = (int) (d + 0.5);
+ }
+ return TCL_OK;
+}
+/*
+ *--------------------------------------------------------------
+ *
+ * TkGetDoublePixels --
+ *
+ * Given a string, returns the number of pixels corresponding to that
+ * string.
+ *
+ * Results:
+ * The return value is a standard Tcl return result. If TCL_OK is
+ * returned, then everything went well and the pixel distance is stored
+ * at *doublePtr; otherwise TCL_ERROR is returned and an error message is
+ * left in interp->result.
+ *
+ * Side effects:
+ * None.
+ *
+ *--------------------------------------------------------------
+ */
+
+int
+TkGetDoublePixels(
+ Tcl_Interp *interp, /* Use this for error reporting. */
+ Tk_Window tkwin, /* Window whose screen determines conversion
+ * from centimeters and other absolute
+ * units. */
+ const char *string, /* String describing a number of pixels. */
+ double *doublePtr) /* Place to store converted result. */
+{
+ char *end;
+ double d;
+
+ if (!tkwin) {
+ Tcl_SetObjResult(interp, Tcl_ObjPrintf("bad screen"));
+ Tcl_SetErrorCode(interp, "TK", "VALUE", "FRACTIONAL_PIXELS", NULL);
+ return TCL_ERROR;
+ }
+ d = strtod((char *) string, &end);
+ if (end == string) {
+ goto error;
+ }
+ while ((*end != '\0') && isspace(UCHAR(*end))) {
+ end++;
+ }
+ switch (*end) {
+ case 0:
+ break;
+ case 'c':
+ d *= 10*WidthOfScreen(Tk_Screen(tkwin));
+ d /= WidthMMOfScreen(Tk_Screen(tkwin));
+ end++;
+ break;
+ case 'i':
+ d *= 25.4*WidthOfScreen(Tk_Screen(tkwin));
+ d /= WidthMMOfScreen(Tk_Screen(tkwin));
+ end++;
+ break;
+ case 'm':
+ d *= WidthOfScreen(Tk_Screen(tkwin));
+ d /= WidthMMOfScreen(Tk_Screen(tkwin));
+ end++;
+ break;
+ case 'p':
+ d *= (25.4/72.0)*WidthOfScreen(Tk_Screen(tkwin));
+ d /= WidthMMOfScreen(Tk_Screen(tkwin));
+ end++;
+ break;
+ default:
+ goto error;
+ }
+ while ((*end != '\0') && isspace(UCHAR(*end))) {
+ end++;
+ }
+ if (*end != 0) {
+ goto error;
+ }
+ *doublePtr = d;
+ return TCL_OK;
+
+ error:
+ Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+ "bad screen distance \"%s\"", string));
+ Tcl_SetErrorCode(interp, "TK", "VALUE", "FRACTIONAL_PIXELS", NULL);
+ return TCL_ERROR;
+}
+\f
+/*
+ * Local Variables:
+ * mode: c
+ * c-basic-offset: 4
+ * fill-column: 78
+ * End:
+ */
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