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magic/windows/windMain.c

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/* windMain.c -
*
* This package implements overlapping windows for the
* Magic VLSI layout system.
*
* Design:
* Windows are structures that are kept in a doubly linked list.
* Windows near the front of the list are on top of windows further
* towards the tail of the list. Each window has some information
* about what is in the window, as well as the size of the window
* (both unclipped and clipped to accommodate windows that overlay it).
* Transforms control what portion of the window's contents show up
* on the screen, and at what magnification.
*
* Each window is owned by a client (the database, a menu package, etc.).
* The window package is notified of a new client by the AddClient
* call. The client supplies routines to redisplay the contents of
* a window, and to do other things with the window (such as delete it).
* Each window is a view onto a surface maintained by the client. The
* client may be asked to redisplay any part of this surface at any time.
* The client must also supply each window with an ID that uniquely
* identifies the surface.
*
* There are currently two types of window packages supported: Magic
* windows (implemented here) and Sun Windows. In Magic windows, all
* windows use the screen's coordinate system. In Sun Windows, each
* window has it's own coordinate system with (0, 0) being at the lower
* left corner. Also, under Sun Windows some of the screen managment
* stuff (such as clipping to obscuring areas and drawing of the
* screen background color) is ignored by us.
*
*
* *********************************************************************
* * Copyright (C) 1985, 1990 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. Export of this software outside *
* * of the United States of America may require an export license. *
* *********************************************************************
*/
#ifndef lint
static char rcsid[] __attribute__ ((unused)) = "$Header$";
#endif /* not lint */
#include <stdio.h>
#include <string.h>
#include "utils/magic.h"
#include "utils/geometry.h"
#include "graphics/glyphs.h"
#include "windows/windows.h"
#include "windows/windInt.h"
#include "utils/stack.h"
#include "tiles/tile.h"
#include "utils/hash.h"
#include "database/database.h"
#include "textio/textio.h"
#include "graphics/graphics.h"
#include "utils/malloc.h"
#include "utils/utils.h"
#include "textio/txcommands.h"
/* The type of windows that this package will implement */
int WindPackageType = WIND_MAGIC_WINDOWS;
/* The size of our scroll bars -- may be set externally (see windows.h)
*/
int WindScrollBarWidth = 7;
/* ------ Internal variables that are global within the window package ----- */
clientRec *windFirstClientRec = NULL; /* the head of the linked list
* of clients
*/
MagWindow *windTopWindow = NULL; /* the topmost window */
MagWindow *windBottomWindow = NULL; /* ...and the bottom window */
extern Plane *windRedisplayArea; /* See windDisplay.c for details. */
/*
* ----------------------------------------------------------------------------
* WindInit --
*
* Initialize the window package. No windows are created, but the
* package will be initialized so that it can do these things in the
* future.
*
* Results:
* None.
*
* Side effects:
* Variables internal to the window package are initialized.
* ----------------------------------------------------------------------------
*/
void
WindInit()
{
extern Stack *windGrabberStack;
Rect ts;
char glyphName[30];
windClientInit();
windGrabberStack = StackNew(2);
windRedisplayArea = DBNewPlane((ClientData) TT_SPACE);
sprintf(glyphName, "windows%d", WindScrollBarWidth);
if (!GrReadGlyphs(glyphName, ".", SysLibPath, &windGlyphs))
MainExit(1);
GrTextSize("XWyqP", GR_TEXT_DEFAULT, &ts);
windCaptionPixels = ts.r_ytop - ts.r_ybot + 3;
WindAreaChanged((MagWindow *) NULL, (Rect *) NULL);
}
/*
* ----------------------------------------------------------------------------
* WindAddClient --
*
* Add a new client of the window package. The client must supply a
* set of routines, as described below.
*
* Results:
* A unique ID (of type WindClient) is returned.
* This is used to identify the client in future calls to the window
* package.
*
* Routines supplied:
*
* ( A new window was just created for this client. Do things to
* initialize the window, such as filling in the caption and making
* the contents be empty. The client may refuse to create a new
* window by returning FALSE, otherwise the client should return
* TRUE. The client will get passed argc and argv, with the command
* name stripped off. The client may do whatever it wants with this.
* It may even modify parts of the window record -- such as changing
* the window's location on the screen.)
*
* bool
* create(w, argc, argv)
* MagWindow *w;
* int argc;
* char *argv[];
* {
* }
*
* ( One of the client's windows is about to be deleted. Do whatever
* needs to be done, such as freeing up dynamically allocated data
* structures. Fields manipulated by the window package, such as
* the caption, should not be freed by the client. The client should
* normally return TRUE. If the client returns FALSE, the window
* manager will refuse the request to delete the window.)
*
* bool
* delete(w)
* MagWindow *w;
* {
* }
*
* ( Redisplay an area of the screen. The client is passed the window,
* the area in his coordinate system, and a clipping rectangle in
* screen coordinates. )
*
* redisplay(w, clientArea, screenArea)
* MagWindow *w;
* Rect *clientArea, *screenArea;
* {
* }
*
*
* ( The window is about to be moved or resized. This procedure will
* be called twice.
*
* The first time (with 'final' == FALSE), the window
* will be passed in 'w' as it is now and a suggested new w_screenarea
* is passed in 'newpos'. The client is free to modify 'newpos' to
* be whatever screen location it desires. The routine should not
* pass 'w' to any window procedure such as windMove since 'w' has
* the old transform, etc. instead of the new one.
*
* On the second call ('final' == TRUE), the window 'w' has all of
* it's fields updated, newpos is equal to w->w_frameArea, and the
* client is free to do things like windMove which require a window
* as an argument. It should not modify newpos.
*
* reposition(w, newpos, final)
* MagWindow *w;
* Rect *newpos -- new w_framearea (screen area of window)
* bool final;
* {
* }
*
*
* ( A command has been issued to this window. The client should
* process it. It is split into Unix-style argc and argv words. )
*
* command(w, client, cmd)
* MagWindow *w;
* TxCommand *cmd;
* {
* }
*
* ( A command has just finished. Update any screen info that may have
* been changed as a result. )
*
* update()
* {
* }
*
* Side effects:
* Internal tables are expanded to include the new client.
* ----------------------------------------------------------------------------
*/
WindClient
WindAddClient(clientName, create, delete, redisplay, command, update,
exitproc, reposition, icon)
char *clientName; /* A textual name for the client. This
* name will be visable in the user
* interface as the name to use to switch
* a window over to a new client
*/
bool (*create)();
bool (*delete)();
void (*redisplay)();
void (*command)();
void (*update)();
bool (*exitproc)();
void (*reposition)();
GrGlyph *icon; /* An icon to draw when the window is closed.
* (currently for Sun Windows only).
*/
{
clientRec *res;
ASSERT( (clientName != NULL), "WindAddClient");
ASSERT( (command != NULL), "WindAddClient");
res = (clientRec *) mallocMagic(sizeof(clientRec));
res->w_clientName = clientName;
res->w_create = create;
res->w_delete = delete;
res->w_redisplay = redisplay;
res->w_command = command;
res->w_update = update;
res->w_exit = exitproc;
res->w_reposition = reposition;
res->w_icon = icon;
res->w_nextClient = windFirstClientRec;
/* The command and function tables are dynamically allocated. */
/* Commands and functions should be registered with the client */
/* using the WindAddCommand() function. */
res->w_commandTable = (char **)mallocMagic(sizeof(char *));
*(res->w_commandTable) = NULL;
res->w_functionTable = (void (**)())mallocMagic(sizeof(void (*)()));
*(res->w_functionTable) = NULL;
windFirstClientRec = res;
return (WindClient) res;
}
/*
* ----------------------------------------------------------------------------
* WindGetClient --
*
* Looks up the unique ID of a client of the window package.
*
* Results:
* A variable of type WindClient is returned if the client was found,
* otherwise NULL is returned.
*
* Side effects:
* None.
* ----------------------------------------------------------------------------
*/
WindClient
WindGetClient(clientName, exact)
char *clientName; /* the textual name of the client */
bool exact; /* must the name be exact, or are abbreviations allowed */
{
clientRec *cr, *found;
int length;
/* Accept only an exact match */
if (exact)
{
for (cr = windFirstClientRec; cr != (clientRec *) NULL;
cr = cr->w_nextClient)
if (!strcmp(clientName, cr->w_clientName))
return (WindClient)cr;
return (WindClient) NULL;
}
/* Accept any unique abbreviation */
found = NULL;
length = strlen(clientName);
for (cr = windFirstClientRec; cr != (clientRec *) NULL;
cr = cr->w_nextClient)
{
if (!strncmp(clientName, cr->w_clientName, length))
{
if (found != NULL) return (WindClient) NULL;
found = cr;
}
}
return (WindClient) found;
}
/*
* ----------------------------------------------------------------------------
* WindNextClient --
*
* Return the w_nextClient record to the caller as a WindClient
* variable. If "client" is 0, pass the first client record.
* This allows the calling routine to enumerate all the known
* clients.
*
* Results:
* Type WindClient is returned. If the end of the list is
* reached, (WindClient)NULL (0) is returned.
*
* Side effects:
* None.
* ----------------------------------------------------------------------------
*/
WindClient
WindNextClient(client)
WindClient client;
{
clientRec *cr = (clientRec *)client;
int length;
if (cr == NULL)
return (WindClient)windFirstClientRec;
else
return (WindClient)(cr->w_nextClient);
}
/*
* ----------------------------------------------------------------------------
* WindPrintClientList --
*
* Print the name of each client of the window package.
*
* Results:
* None.
*
* Side effects:
* None.
* ----------------------------------------------------------------------------
*/
void
WindPrintClientList(wizard)
bool wizard; /* If true print the names of ALL clients, even those
* that don't have user-visable windows */
{
clientRec *cr;
for (cr = windFirstClientRec; cr != (clientRec *) NULL;
cr = cr->w_nextClient) {
if (wizard || (cr->w_clientName[0] != '*'))
TxError(" %s\n", cr->w_clientName);
}
}
/*
* ----------------------------------------------------------------------------
* WindExecute --
*
* Execute the command associated with a windClient
*
* Results:
* Returns the command index on success. Returns -1 if the
* command was not found in the client's command list. Returns
* -2 if the procedure was sent an empty command.
*
* Side effects:
* Whatever is done by the command execution.
*
* ----------------------------------------------------------------------------
*/
int
WindExecute(w, rc, cmd)
MagWindow *w;
WindClient rc;
TxCommand *cmd;
{
int cmdNum;
clientRec *client = (clientRec *) rc;
char **commandTable = client->w_commandTable;
void (**functionTable)() = client->w_functionTable;
if (cmd->tx_argc > 0)
{
cmdNum = Lookup(cmd->tx_argv[0], commandTable);
if (cmdNum >= 0)
{
(*functionTable[cmdNum])(w, cmd);
return cmdNum;
}
return -1;
}
return -2;
}
/*
* ----------------------------------------------------------------------------
* WindAddCommand --
*
* Add a command to the indicated client. The command is passed
* in "text", which also contains the (1-line) help text for the
* command. "func" is a function pointer, and "volatile" is TRUE
* if the command "text" is dynamically allocated and must be
* copied before adding to the client.
*
* Results:
* None
*
* Side effects:
* The memory allocated to the command and function pointers may
* be reallocated and the entries in the client record updated.
*
* ----------------------------------------------------------------------------
*/
void
WindAddCommand(rc, text, func, dynamic)
WindClient rc;
char *text;
void (*func)();
bool dynamic;
{
int cidx, numCommands = 0;
clientRec *client = (clientRec *) rc;
char **commandTable = client->w_commandTable;
void (**functionTable)() = client->w_functionTable;
char **newcmdTable;
void (**newfnTable)();
/* Find the number of commands and functions, increment by one, and */
/* Allocate a new array of pointers. */
while (commandTable[numCommands] != NULL) numCommands++;
numCommands++;
newcmdTable = (char **)mallocMagic((numCommands + 1) * sizeof(char *));
newfnTable = (void (**)())mallocMagic((numCommands + 1) * sizeof(void (*)()));
/* Copy the old values, inserting the new command in alphabetical */
/* order. */
for (cidx = 0; (commandTable[cidx] != NULL) &&
(strcmp(commandTable[cidx], text) < 0); cidx++)
{
newcmdTable[cidx] = commandTable[cidx];
newfnTable[cidx] = functionTable[cidx];
}
if (dynamic)
newcmdTable[cidx] = StrDup(NULL, text);
else
newcmdTable[cidx] = text;
newfnTable[cidx] = func;
for (; commandTable[cidx] != NULL; cidx++)
{
newcmdTable[cidx + 1] = commandTable[cidx];
newfnTable[cidx + 1] = functionTable[cidx];
}
newcmdTable[cidx + 1] = NULL;
/* Release memory for the original pointers, and replace the */
/* pointers in the client record. */
freeMagic(commandTable);
freeMagic(functionTable);
client->w_commandTable = newcmdTable;
client->w_functionTable = newfnTable;
}
/*
* ----------------------------------------------------------------------------
* WindReplaceCommand --
*
* Change the function for the indicated command. This routine
* is mainly used by the Tcl module interface, where commands
* are registered with the command interpreter pointing to an
* "auto" function which loads the module, then calls this routine
* to replace the auto-load function with the real one.
*
* Note that this routine matches to the length of "command", then
* checks one character beyond in the command table to ensure that
* we don't inadvertently change a command which happens to be a
* substring of the intended command. In cases where this is
* intended (e.g., "ext" and "extract"), the routine must be called
* separately for each command string.
*
* Results:
* 0 on success, -1 if the command was not found.
*
* Side effects:
* The clientRec structure for the DBWind interface is altered.
*
* ----------------------------------------------------------------------------
*/
int
WindReplaceCommand(rc, command, newfunc)
WindClient rc;
char *command;
void (*newfunc)();
{
int cidx, clen;
clientRec *client = (clientRec *) rc;
char **commandTable = client->w_commandTable;
void (**functionTable)() = client->w_functionTable;
clen = strlen(command);
for (cidx = 0; commandTable[cidx] != NULL; cidx++)
if (!strncmp(commandTable[cidx], command, clen))
if (!isalnum(*(commandTable[cidx] + clen)))
{
functionTable[cidx] = newfunc;
return 0;
}
return -1;
}
/*
* ----------------------------------------------------------------------------
* WindGetCommandTable --
*
* For functions wishing to parse the command table of a client
* directly, this routine returns a pointer to the top of the
* table. The only purpose of this routine is to export the
* w_commandTable value inside the clientRec structure, which is
* not itself exported.
*
* Results:
* A pointer to the top of the command table of the indicated
* client.
*
* Side effects:
* None.
* ----------------------------------------------------------------------------
*/
char **
WindGetCommandTable(rc)
WindClient rc;
{
clientRec *client = (clientRec *) rc;
return client->w_commandTable;
}
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