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608 lines
17 KiB
C
608 lines
17 KiB
C
/* Copyright Massachusetts Institute of Technology 1985 */
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#include "copyright.h"
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/*
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Copyright (C) 2001-2016 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/*
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* XMenu: MIT Project Athena, X Window system menu package
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*
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* XMenuActivate - Maps a given menu to the display and activates
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* the menu for user selection. The user is allowed to
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* specify which pane and selection will be current,
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* the X and Y location of the menu (relative to the
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* parent window) and the mouse button event mask that
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* will be used to identify a selection request.
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*
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* A menu selection is shown to be current by placing
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* a highlight box around the selection as the mouse
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* cursor enters its active region. Inactive selections
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* will not be highlighted. As the mouse cursor moved
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* from one menu pane to another menu pane the pane being
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* entered is raised and made current and the pane being
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* left is lowered.
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*
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* Anytime XMenuActivate returns, the p_num and
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* s_num are left at their last known values (i.e.,
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* the last known current pane and selection indices).
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* The following are the defined return states:
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*
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* 1) If at any time an error occurs the data
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* pointer is left untouched and XM_FAILURE
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* is returned.
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*
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* 2) When a selection request is received (i.e.,
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* when the specified mouse event occurs) the
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* data pointer will be set to the data
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* associated with the particular selection
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* current at the time of the selection request
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* and XM_SUCCESS is returned.
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*
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* 3) If no selection was current at the time a
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* selection request is made the data pointer
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* will be left untouched and XM_NO_SELECT will
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* be returned.
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*
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* 4) If the selection that was current at the time
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* a selection request is made is not an active
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* selection the data pointer will be left
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* untouched and XM_IA_SELECT will be returned.
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*
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* Since X processes events in an asynchronous manner
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* it is likely that XMenuActivate will encounter
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* a "foreign event" while it is executing. Foreign
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* events are handled in one of three ways:
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*
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* 1) The event is discarded. This is the default
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* mode and requires no action on the part of the
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* application.
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*
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* 2) The application has identified an asynchronous
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* event handler that will be called and the
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* foreign event handed off to it. Note:
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* AEQ mode disables this mode temporarily.
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*
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* 3) The application has enabled asynchronous event
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* queuing mode. In this mode all foreign events
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* will be queued up until XMenuActivate
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* terminates; at which time they will be
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* returned to the X event queue. As long as
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* AEQ mode is enabled any asynchronous event
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* handler as temporarily disabled.
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*
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* Any events encountered while taking down the menu
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* (i.e., exposure events from occluded windows) will
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* automatically be returned to the X event queue after
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* XMenuActivate has cleaned the queue of any of its own
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* events that are no longer needed.
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*
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* Author: Tony Della Fera, DEC
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* March 12, 1986
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*
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*/
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#include "XMenuInt.h"
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#include <X11/keysym.h>
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/* For debug, set this to 0 to not grab the keyboard on menu popup */
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int x_menu_grab_keyboard = 1;
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static Wait_func wait_func;
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static void* wait_data;
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void
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XMenuActivateSetWaitFunction (Wait_func func, void *data)
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{
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wait_func = func;
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wait_data = data;
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}
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int
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XMenuActivate(
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register Display *display, /* Display to put menu on. */
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register XMenu *menu, /* Menu to activate. */
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int *p_num, /* Pane number selected. */
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int *s_num, /* Selection number selected. */
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int x_pos, /* X coordinate of menu position. */
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int y_pos, /* Y coordinate of menu position. */
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unsigned int event_mask, /* Mouse button event mask. */
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char **data, /* Pointer to return data value. */
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void (*help_callback) (char const *, int, int)) /* Help callback. */
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{
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int status; /* X routine call status. */
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int orig_x; /* Upper left menu origin X coord. */
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int orig_y; /* Upper left menu origin Y coord. */
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int ret_val; /* Return value. */
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register XMPane *p_ptr; /* Current XMPane. */
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register XMPane *event_xmp; /* Event XMPane pointer. */
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register XMPane *cur_p; /* Current pane. */
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register XMSelect *cur_s; /* Current selection. */
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XMWindow *event_xmw; /* Event XMWindow pointer. */
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XEvent event; /* X input event. */
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XEvent peek_event; /* X input peek ahead event. */
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Bool selection = False; /* Selection has been made. */
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Bool forward = True; /* Moving forward in the pane list. */
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Window root, child;
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int root_x, root_y, win_x, win_y;
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unsigned int mask;
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KeySym keysym;
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/*
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* Define and allocate a foreign event queue to hold events
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* that don't belong to XMenu. These events are later restored
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* to the X event queue.
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*/
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typedef struct _xmeventque {
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XEvent event;
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struct _xmeventque *next;
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} XMEventQue;
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XMEventQue *feq = NULL; /* Foreign event queue. */
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XMEventQue *feq_tmp; /* Foreign event queue temporary. */
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/*
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* If there are no panes in the menu then return failure
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* because the menu is not initialized.
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*/
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if (menu->p_count == 0) {
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_XMErrorCode = XME_NOT_INIT;
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return(XM_FAILURE);
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}
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/*
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* Find the desired current pane.
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*/
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cur_p = _XMGetPanePtr(menu, *p_num);
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if (cur_p == NULL) {
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return(XM_FAILURE);
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}
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cur_p->activated = cur_p->active;
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/*
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* Find the desired current selection.
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* If the current selection index is out of range a null current selection
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* will be assumed and the cursor will be placed in the current pane
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* header.
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*/
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cur_s = _XMGetSelectionPtr(cur_p, *s_num);
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/*
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* Compute origin of menu so that cursor is in
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* Correct pane and selection.
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*/
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_XMTransToOrigin(display,
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menu,
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cur_p, cur_s,
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x_pos, y_pos,
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&orig_x, &orig_y);
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menu->x_pos = orig_x; /* Store X and Y coords of menu. */
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menu->y_pos = orig_y;
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if (XMenuRecompute(display, menu) == XM_FAILURE) {
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return(XM_FAILURE);
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}
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/*
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* Flush the window creation queue.
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* This batches all window creates since lazy evaluation
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* is more efficient than individual evaluation.
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* This routine also does an XFlush().
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*/
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if (_XMWinQueFlush(display, menu, cur_p, cur_s) == _FAILURE) {
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return(XM_FAILURE);
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}
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/*
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* Make sure windows are in correct order (in case we were passed
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* an already created menu in incorrect order.)
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*/
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for(p_ptr = menu->p_list->next; p_ptr != cur_p; p_ptr = p_ptr->next)
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XRaiseWindow(display, p_ptr->window);
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for(p_ptr = menu->p_list->prev; p_ptr != cur_p->prev; p_ptr = p_ptr->prev)
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XRaiseWindow(display, p_ptr->window);
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/*
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* Make sure all selection windows are mapped.
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*/
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for (
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p_ptr = menu->p_list->next;
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p_ptr != menu->p_list;
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p_ptr = p_ptr->next
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){
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XMapSubwindows(display, p_ptr->window);
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}
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/*
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* Synchronize the X buffers and the event queue.
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* From here on, all events in the queue that don't belong to
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* XMenu are sent back to the application via an application
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* provided event handler or discarded if the application has
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* not provided an event handler.
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*/
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XSync(display, 0);
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/*
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* Grab the mouse for menu input.
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*/
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status = XGrabPointer(
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display,
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menu->parent,
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True,
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event_mask,
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GrabModeAsync,
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GrabModeAsync,
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None,
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menu->mouse_cursor,
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CurrentTime
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);
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if (status == Success && x_menu_grab_keyboard)
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{
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status = XGrabKeyboard (display,
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menu->parent,
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False,
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GrabModeAsync,
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GrabModeAsync,
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CurrentTime);
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if (status != Success)
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XUngrabPointer(display, CurrentTime);
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}
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if (status == _X_FAILURE) {
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_XMErrorCode = XME_GRAB_MOUSE;
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return(XM_FAILURE);
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}
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/*
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* Map the menu panes.
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*/
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XMapWindow(display, cur_p->window);
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for (p_ptr = menu->p_list->next;
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p_ptr != cur_p;
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p_ptr = p_ptr->next)
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XMapWindow(display, p_ptr->window);
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for (p_ptr = cur_p->next;
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p_ptr != menu->p_list;
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p_ptr = p_ptr->next)
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XMapWindow(display, p_ptr->window);
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XRaiseWindow(display, cur_p->window); /* Make sure current */
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/* pane is on top. */
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cur_s = NULL; /* Clear current selection. */
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/*
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* Begin event processing loop.
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*/
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while (1) {
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if (wait_func) (*wait_func) (wait_data);
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XNextEvent(display, &event); /* Get next event. */
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switch (event.type) { /* Dispatch on the event type. */
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case Expose:
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event_xmp = (XMPane *)XLookUpAssoc(display,
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menu->assoc_tab,
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event.xexpose.window);
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if (event_xmp == NULL) {
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/*
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* If AEQ mode is enabled then queue the event.
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*/
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if (menu->aeq) {
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feq_tmp = (XMEventQue *)malloc(sizeof(XMEventQue));
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if (feq_tmp == NULL) {
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_XMErrorCode = XME_CALLOC;
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return(XM_FAILURE);
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}
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feq_tmp->event = event;
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feq_tmp->next = feq;
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feq = feq_tmp;
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}
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else if (_XMEventHandler) (*_XMEventHandler)(&event);
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break;
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}
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if (event_xmp->activated) {
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XSetWindowBackground(display,
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event_xmp->window,
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menu->bkgnd_color);
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}
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else {
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XSetWindowBackgroundPixmap(display,
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event_xmp->window,
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menu->inact_pixmap);
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}
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_XMRefreshPane(display, menu, event_xmp);
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break;
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case EnterNotify:
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/*
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* First wait a small period of time, and see
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* if another EnterNotify event follows hard on the
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* heels of this one. i.e., the user is simply
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* "passing through". If so, ignore this one.
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*/
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event_xmw = (XMWindow *)XLookUpAssoc(display,
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menu->assoc_tab,
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event.xcrossing.window);
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if (event_xmw == NULL) break;
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if (event_xmw->type == SELECTION) {
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/*
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* We have entered a selection.
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*/
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/* if (XPending(display) == 0) usleep(150000); */
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if (XPending(display) != 0) {
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XPeekEvent(display, &peek_event);
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if(peek_event.type == LeaveNotify) {
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break;
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}
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}
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cur_s = (XMSelect *)event_xmw;
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help_callback (cur_s->help_string,
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cur_p->serial, cur_s->serial);
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/*
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* If the pane we are in is active and the
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* selection entered is active then activate
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* the selection.
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*/
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if (cur_p->active && cur_s->active > 0) {
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cur_s->activated = 1;
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_XMRefreshSelection(display, menu, cur_s);
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}
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}
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else {
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/*
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* We have entered a pane.
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*/
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/* if (XPending(display) == 0) usleep(150000); */
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if (XPending(display) != 0) {
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XPeekEvent(display, &peek_event);
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if (peek_event.type == EnterNotify) break;
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}
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XQueryPointer(display,
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menu->parent,
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&root, &child,
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&root_x, &root_y,
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&win_x, &win_y,
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&mask);
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event_xmp = (XMPane *)XLookUpAssoc(display,
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menu->assoc_tab,
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child);
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if (event_xmp == NULL) break;
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if (event_xmp == cur_p) break;
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if (event_xmp->serial > cur_p->serial) forward = True;
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else forward = False;
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p_ptr = cur_p;
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while (p_ptr != event_xmp) {
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if (forward) p_ptr = p_ptr->next;
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else p_ptr = p_ptr->prev;
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XRaiseWindow(display, p_ptr->window);
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}
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if (cur_p->activated) {
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cur_p->activated = False;
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XSetWindowBackgroundPixmap(display,
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cur_p->window,
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menu->inact_pixmap);
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_XMRefreshPane(display, menu, cur_p);
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}
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if (event_xmp->active) event_xmp->activated = True;
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#if 1
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/*
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* i suspect the we don't get an EXPOSE event when backing
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* store is enabled; the menu windows content is probably
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* not drawn in when it should be in that case.
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* in that case, this is probably an ugly fix!
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* i hope someone more familiar with this code would
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* take it from here. -- caveh@eng.sun.com.
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*/
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XSetWindowBackground(display,
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event_xmp->window,
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menu->bkgnd_color);
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_XMRefreshPane(display, menu, event_xmp);
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#endif
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cur_p = event_xmp;
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}
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break;
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case LeaveNotify:
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event_xmw = (XMWindow *)XLookUpAssoc(
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display,
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menu->assoc_tab,
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event.xcrossing.window
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);
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if (event_xmw == NULL) break;
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if(cur_s == NULL) break;
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/*
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* If the current selection was activated then
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* deactivate it.
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*/
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if (cur_s->activated) {
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cur_s->activated = False;
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_XMRefreshSelection(display, menu, cur_s);
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}
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cur_s = NULL;
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break;
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case ButtonPress:
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case ButtonRelease:
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*p_num = cur_p->serial;
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/*
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* Check to see if there is a current selection.
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*/
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if (cur_s != NULL) {
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/*
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* Set the selection number to the current selection.
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*/
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*s_num = cur_s->serial;
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/*
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* If the current selection was activated then
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* we have a valid selection otherwise we have
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* an inactive selection.
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*/
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if (cur_s->activated) {
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*data = cur_s->data;
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ret_val = XM_SUCCESS;
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}
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else {
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ret_val = XM_IA_SELECT;
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}
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}
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else {
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/*
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* No selection was current.
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*/
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ret_val = XM_NO_SELECT;
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}
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selection = True;
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break;
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case KeyPress:
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case KeyRelease:
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keysym = XLookupKeysym (&event.xkey, 0);
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/* Pop down on C-g and Escape. */
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if ((keysym == XK_g && (event.xkey.state & ControlMask) != 0)
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|| keysym == XK_Escape) /* Any escape, ignore modifiers. */
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{
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ret_val = XM_NO_SELECT;
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selection = True;
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}
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break;
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default:
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/*
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* If AEQ mode is enabled then queue the event.
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*/
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if (menu->aeq) {
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feq_tmp = (XMEventQue *)malloc(sizeof(XMEventQue));
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if (feq_tmp == NULL) {
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_XMErrorCode = XME_CALLOC;
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return(XM_FAILURE);
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}
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feq_tmp->event = event;
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feq_tmp->next = feq;
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feq = feq_tmp;
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}
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else if (_XMEventHandler) (*_XMEventHandler)(&event);
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}
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/*
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* If a selection has been made, break out of the event loop.
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*/
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if (selection == True) break;
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}
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/*
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* Unmap the menu.
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*/
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for ( p_ptr = menu->p_list->next;
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p_ptr != menu->p_list;
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p_ptr = p_ptr->next)
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{
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XUnmapWindow(display, p_ptr->window);
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}
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/*
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* Ungrab the mouse.
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*/
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XUngrabPointer(display, CurrentTime);
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XUngrabKeyboard(display, CurrentTime);
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/*
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* Restore bits under where the menu was if we managed
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* to save them and free the pixmap.
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*/
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/*
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* If there is a current selection deactivate it.
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*/
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if (cur_s != NULL) cur_s->activated = 0;
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/*
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* Deactivate the current pane.
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*/
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cur_p->activated = 0;
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XSetWindowBackgroundPixmap(display, cur_p->window, menu->inact_pixmap);
|
|
|
|
/*
|
|
* Synchronize the X buffers and the X event queue.
|
|
*/
|
|
XSync(display, 0);
|
|
|
|
/*
|
|
* Dispatch any events remaining on the queue.
|
|
*/
|
|
while (QLength(display)) {
|
|
/*
|
|
* Fetch the next event.
|
|
*/
|
|
XNextEvent(display, &event);
|
|
|
|
/*
|
|
* Discard any events left on the queue that belong to XMenu.
|
|
* All others are held and then returned to the event queue.
|
|
*/
|
|
switch (event.type) {
|
|
case Expose:
|
|
case EnterNotify:
|
|
case LeaveNotify:
|
|
case ButtonPress:
|
|
case ButtonRelease:
|
|
/*
|
|
* Does this event belong to one of XMenu's windows?
|
|
* If so, discard it and process the next event.
|
|
* If not fall through and treat it as a foreign event.
|
|
*/
|
|
event_xmp = (XMPane *)XLookUpAssoc(
|
|
display,
|
|
menu->assoc_tab,
|
|
event.xbutton.window
|
|
);
|
|
if (event_xmp != NULL) continue;
|
|
default:
|
|
/*
|
|
* This is a foreign event.
|
|
* Queue it for later return to the X event queue.
|
|
*/
|
|
feq_tmp = (XMEventQue *)malloc(sizeof(XMEventQue));
|
|
if (feq_tmp == NULL) {
|
|
_XMErrorCode = XME_CALLOC;
|
|
return(XM_FAILURE);
|
|
}
|
|
feq_tmp->event = event;
|
|
feq_tmp->next = feq;
|
|
feq = feq_tmp;
|
|
}
|
|
}
|
|
/*
|
|
* Return any foreign events that were queued to the X event queue.
|
|
*/
|
|
while (feq != NULL) {
|
|
feq_tmp = feq;
|
|
XPutBackEvent(display, &feq_tmp->event);
|
|
feq = feq_tmp->next;
|
|
free((char *)feq_tmp);
|
|
}
|
|
|
|
wait_func = 0;
|
|
|
|
/*
|
|
* Return successfully.
|
|
*/
|
|
_XMErrorCode = XME_NO_ERROR;
|
|
return(ret_val);
|
|
|
|
}
|