/*
 * tkMacOSXDebug.c --
 *
 *	Implementation of Macintosh specific functions for debugging MacOS events,
 *	regions, etc...
 *
 * Copyright 2001, Apple Computer, Inc.
 * Copyright (c) 2006-2007 Daniel A. Steffen <das@users.sourceforge.net>
 *
 * See the file "license.terms" for information on usage and redistribution of
 * this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 *	The following terms apply to all files originating from Apple
 *	Computer, Inc. ("Apple") and associated with the software
 *	unless explicitly disclaimed in individual files.
 *
 *
 *	Apple hereby grants permission to use, copy, modify,
 *	distribute, and license this software and its documentation
 *	for any purpose, provided that existing copyright notices are
 *	retained in all copies and that this notice is included
 *	verbatim in any distributions. No written agreement, license,
 *	or royalty fee is required for any of the authorized
 *	uses. Modifications to this software may be copyrighted by
 *	their authors and need not follow the licensing terms
 *	described here, provided that the new terms are clearly
 *	indicated on the first page of each file where they apply.
 *
 *
 *	IN NO EVENT SHALL APPLE, THE AUTHORS OR DISTRIBUTORS OF THE
 *	SOFTWARE BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, SPECIAL,
 *	INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF
 *	THIS SOFTWARE, ITS DOCUMENTATION, OR ANY DERIVATIVES THEREOF,
 *	EVEN IF APPLE OR THE AUTHORS HAVE BEEN ADVISED OF THE
 *	POSSIBILITY OF SUCH DAMAGE.  APPLE, THE AUTHORS AND
 *	DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES, INCLUDING,
 *	BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
 *	FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT.	 THIS
 *	SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, AND APPLE,THE
 *	AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE
 *	MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
 *
 *	GOVERNMENT USE: If you are acquiring this software on behalf
 *	of the U.S. government, the Government shall have only
 *	"Restricted Rights" in the software and related documentation
 *	as defined in the Federal Acquisition Regulations (FARs) in
 *	Clause 52.227.19 (c) (2).  If you are acquiring the software
 *	on behalf of the Department of Defense, the software shall be
 *	classified as "Commercial Computer Software" and the
 *	Government shall have only "Restricted Rights" as defined in
 *	Clause 252.227-7013 (c) (1) of DFARs.  Notwithstanding the
 *	foregoing, the authors grant the U.S. Government and others
 *	acting in its behalf permission to use and distribute the
 *	software in accordance with the terms specified in this
 *	license.
 */

#include "tkMacOSXPrivate.h"
#include "tkMacOSXDebug.h"

#ifdef TK_MAC_DEBUG

typedef struct {
    EventKind kind;
    const char * name;
} MyEventName;

typedef struct {
    EventClass c;
    MyEventName * names;
} MyEventNameList;

static MyEventName windowEventNames [] = {
 {  kEventWindowUpdate,"Update"},
 {  kEventWindowDrawContent,"DrawContent"},
 {  kEventWindowActivated,"Activated"},
 {  kEventWindowDeactivated,"Deactivated"},
 {  kEventWindowGetClickActivation,"GetClickActivation"},
 {  kEventWindowShowing,"Showing"},
 {  kEventWindowHiding,"Hiding"},
 {  kEventWindowShown,"Shown"},
 {  kEventWindowHidden,"Hidden"},
 {  kEventWindowBoundsChanging,"BoundsChanging"},
 {  kEventWindowBoundsChanged,"BoundsChanged"},
 {  kEventWindowResizeStarted,"ResizeStarted"},
 {  kEventWindowResizeCompleted,"ResizeCompleted"},
 {  kEventWindowDragStarted,"DragStarted"},
 {  kEventWindowDragCompleted,"DragCompleted"},
 {  kEventWindowClickDragRgn,"ClickDragRgn"},
 {  kEventWindowClickResizeRgn,"ClickResizeRgn"},
 {  kEventWindowClickCollapseRgn,"ClickCollapseRgn"},
 {  kEventWindowClickCloseRgn,"ClickCloseRgn"},
 {  kEventWindowClickZoomRgn,"ClickZoomRgn"},
 {  kEventWindowClickContentRgn,"ClickContentRgn"},
 {  kEventWindowClickProxyIconRgn,"ClickProxyIconRgn"},
 {  kEventWindowCursorChange,"CursorChange" },
 {  kEventWindowCollapse,"Collapse"},
 {  kEventWindowCollapsed,"Collapsed"},
 {  kEventWindowCollapseAll,"CollapseAll"},
 {  kEventWindowExpand,"Expand"},
 {  kEventWindowExpanded,"Expanded"},
 {  kEventWindowExpandAll,"ExpandAll"},
 {  kEventWindowCollapse,"Collapse"},
 {  kEventWindowClose,"Close"},
 {  kEventWindowClosed,"Closed"},
 {  kEventWindowCloseAll,"CloseAll"},
 {  kEventWindowZoom,"Zoom"},
 {  kEventWindowZoomed,"Zoomed"},
 {  kEventWindowZoomAll,"ZoomAll"},
 {  kEventWindowContextualMenuSelect,"ContextualMenuSelect"},
 {  kEventWindowPathSelect,"PathSelect"},
 {  kEventWindowGetIdealSize,"GetIdealSize"},
 {  kEventWindowGetMinimumSize,"GetMinimumSize"},
 {  kEventWindowGetMaximumSize,"GetMaximumSize"},
 {  kEventWindowConstrain,"Constrain"},
 {  kEventWindowHandleContentClick,"HandleContentClick"},
 {  kEventWindowProxyBeginDrag,"ProxyBeginDra}"},
 {  kEventWindowProxyEndDrag,"ProxyEndDrag"},
 {  kEventWindowFocusAcquired,"FocusAcquired"},
 {  kEventWindowFocusRelinquish,"FocusRelinquish"},
 {  kEventWindowDrawFrame,"DrawFrame"},
 {  kEventWindowDrawPart,"DrawPart"},
 {  kEventWindowGetRegion,"GetRegion"},
 {  kEventWindowHitTest,"HitTest"},
 {  kEventWindowInit,"Init"},
 {  kEventWindowDispose,"Dispose"},
 {  kEventWindowDragHilite,"DragHilite"},
 {  kEventWindowModified,"Modified"},
 {  kEventWindowSetupProxyDragImage,"SetupProxyDragImage"},
 {  kEventWindowStateChanged,"StateChanged"},
 {  kEventWindowMeasureTitle,"MeasureTitle"},
 {  kEventWindowDrawGrowBox,"DrawGrowBox"},
 {  kEventWindowGetGrowImageRegion,"GetGrowImageRegion"},
 {  kEventWindowPaint,"Paint"},
 { 0, NULL },
};

static MyEventName mouseEventNames [] = {
 {  kEventMouseMoved, "Moved"},
 {  kEventMouseUp, "Up"},
 {  kEventMouseDown, "Down"},
 {  kEventMouseDragged, "Dragged"},
 {  kEventMouseWheelMoved, "WheelMoved"},
 { 0, NULL}
};

static MyEventName keyboardEventNames [] = {
 { kEventRawKeyDown, "Down"},
 { kEventRawKeyRepeat, "Repeat"},
 { kEventRawKeyUp, "Up"},
 { kEventRawKeyModifiersChanged, "ModifiersChanged"},
 { kEventHotKeyPressed, "HotKeyPressed"},
 { kEventHotKeyReleased, "HotKeyReleased"},
 { 0, NULL}
};

static MyEventName appEventNames [] = {
 { kEventAppActivated, "Activated"},
 { kEventAppDeactivated, "Deactivated"},
 { kEventAppQuit, "Quit"},
 { kEventAppLaunchNotification, "LaunchNotification"},
 { kEventAppLaunched, "Launched"},
 { kEventAppTerminated, "Terminated"},
 { kEventAppFrontSwitched, "FrontSwitched"},
 { 0, NULL}
};

static MyEventName menuEventNames [] = {
 { kEventMenuBeginTracking, "BeginTracking"},
 { kEventMenuEndTracking, "EndTracking"},
 { kEventMenuChangeTrackingMode, "ChangeTrackingMode"},
 { kEventMenuOpening, "Opening"},
 { kEventMenuClosed, "Closed"},
 { kEventMenuTargetItem, "TargetItem"},
 { kEventMenuMatchKey, "MatchKey"},
 { kEventMenuEnableItems, "EnableItems"},
 { kEventMenuDispose, "Dispose"},
 { 0, NULL }
};

static MyEventName controlEventNames [] = {
 { kEventControlInitialize, "Initialize" },
 { kEventControlDispose, "Dispose" },
 { kEventControlGetOptimalBounds, "GetOptimalBounds" },
 { kEventControlHit, "Hit" },
 { kEventControlSimulateHit, "SimulateHit" },
 { kEventControlHitTest, "HitTest" },
 { kEventControlDraw, "Draw" },
 { kEventControlApplyBackground, "ApplyBackground" },
 { kEventControlApplyTextColor, "ApplyTextColor" },
 { kEventControlSetFocusPart, "SetFocusPart" },
 { kEventControlGetFocusPart, "GetFocusPart" },
 { kEventControlActivate, "Activate" },
 { kEventControlDeactivate, "Deactivate" },
 { kEventControlSetCursor, "SetCursor" },
 { kEventControlContextualMenuClick, "ContextualMenuClick" },
 { kEventControlClick, "Click" },
 { kEventControlTrack, "Track" },
 { kEventControlGetScrollToHereStartPoint, "GetScrollToHereStartPoint" },
 { kEventControlGetIndicatorDragConstraint, "GetIndicatorDragConstraint" },
 { kEventControlIndicatorMoved, "IndicatorMoved" },
 { kEventControlGhostingFinished, "GhostingFinished" },
 { kEventControlGetActionProcPart, "GetActionProcPart" },
 { kEventControlGetPartRegion, "GetPartRegion" },
 { kEventControlGetPartBounds, "GetPartBounds" },
 { kEventControlSetData, "SetData" },
 { kEventControlGetData, "GetData" },
 { kEventControlValueFieldChanged, "ValueFieldChanged" },
 { kEventControlAddedSubControl, "AddedSubControl" },
 { kEventControlRemovingSubControl, "RemovingSubControl" },
 { kEventControlBoundsChanged, "BoundsChanged" },
 { kEventControlOwningWindowChanged, "OwningWindowChanged" },
 { kEventControlArbitraryMessage, "ArbitraryMessage" },
 { 0, NULL }
};

static MyEventName commandEventNames [] = {
 { kEventCommandProcess, "Process" },
 { kEventCommandUpdateStatus, "UpdateStatus" },
 { 0, NULL }
};

static MyEventNameList eventNameList [] = {
 { kEventClassWindow, windowEventNames },
 { kEventClassMouse, mouseEventNames },
 { kEventClassKeyboard, keyboardEventNames },
 { kEventClassApplication, appEventNames },
 { kEventClassMenu, menuEventNames },
 { kEventClassControl, controlEventNames },
 { kEventClassCommand, commandEventNames },
 { 0, NULL}
};

#ifdef TK_MACOSXDEBUG_UNUSED
static MyEventName classicEventNames [] = {
 { nullEvent,"nullEvent" },
 { mouseDown,"mouseDown" },
 { mouseUp,"mouseUp" },
 { keyDown,"keyDown" },
 { keyUp,"keyUp" },
 { autoKey,"autoKey" },
 { updateEvt,"updateEvt" },
 { diskEvt,"diskEvt" },
 { activateEvt,"activateEvt" },
 { osEvt,"osEvt" },
 { kHighLevelEvent,"kHighLevelEvent" },
 { 0, NULL }
};
#endif /* TK_MACOSXDEBUG_UNUSED */

MODULE_SCOPE char *
TkMacOSXCarbonEventToAscii(EventRef eventRef)
{
    EventClass eventClass;
    EventKind eventKind;
    MyEventNameList * list = eventNameList;
    MyEventName * names = NULL;
    static char str[256];
    char *buf = str;
    int *iPtr = (int*)str;
    int found = 0;

    eventClass = GetEventClass(eventRef);
    eventKind = GetEventKind(eventRef);

    *iPtr = eventClass;
    buf[4] = 0;
    strcat(buf, " ");
    buf += strlen(buf);
    while (list->names && (!names) ) {
	if (eventClass == list->c) {
	    names = list -> names;
	} else {
	    list++;
	}
    }
   while (names && names->name) {
       if (eventKind == names->kind) {
	   snprintf(buf, 250, "%-20s", names->name);
	   break;
       } else {
	   names++;
       }
    }
    if (!found) {
	snprintf(buf, 250, "%-20d", eventKind);
    }
    return str;
}

#ifdef TK_MACOSXDEBUG_UNUSED
MODULE_SCOPE char *
TkMacOSXCarbonEventKindToAscii(EventRef eventRef, char * buf )
{
   EventClass eventClass;
   EventKind  eventKind;
   MyEventNameList * list = eventNameList;
   MyEventName	   * names = NULL;
   int		     found = 0;
   eventClass = GetEventClass(eventRef);
   eventKind = GetEventKind(eventRef);
   while (list->names && (!names) ) {
       if (eventClass == list -> c) {
	   names = list -> names;
       } else {
	   list++;
       }
   }
   if (names) {
       found = 0;
       while ( names->name && !found ) {
	   if (eventKind == names->kind) {
	       sprintf(buf,"%s",names->name);
	       found = 1;
	   } else {
	       names++;
	   }
       }
    }
    if (!found) {
	sprintf ( buf,"%d", eventKind );
     } else {
	sprintf ( buf,"%d", eventKind );
     }
     return buf;
}

MODULE_SCOPE char *
TkMacOSXClassicEventToAscii(EventRecord * eventPtr, char * buf )
{
    MyEventName	    * names = NULL;
    int found = 0;
    names = classicEventNames;
    while ( names -> name && !found )
	if (eventPtr->what == names->kind) {
	    int * iPtr;
	    char cBuf[8];
	    iPtr=(int *) &cBuf;
	    *iPtr = eventPtr->message;
	    cBuf[4] = 0;
	    sprintf(buf, "%-16s %08x %04x %s", names->name,
		    (int) eventPtr->message,
		    eventPtr->modifiers,
		    cBuf);
	    found = 1;
	} else {
	  names++;
	}
    if (!found) {
	       sprintf(buf,"%-16d %08x %08x, %s",
		       eventPtr->what, (int) eventPtr->message,
		       eventPtr->modifiers, buf);
    }
    return buf;

}

MODULE_SCOPE void
TkMacOSXPrintPoint(char * tag, Point * p )
{
    TkMacOSXDbgMsg("%s %4d %4d", tag,p->h,p->v );
}

MODULE_SCOPE void
TkMacOSXPrintRect(char * tag, Rect * r )
{
    TkMacOSXDbgMsg("%s %4d %4d %4d %4d (%dx%d)",
	tag, r->left, r->top, r->right, r->bottom,
	r->right - r->left + 1, r->bottom - r->top + 1);
}

MODULE_SCOPE void
TkMacOSXPrintRegion(char * tag, RgnHandle rgn )
{
    Rect r;
    GetRegionBounds(rgn,&r);
    TkMacOSXPrintRect(tag,&r);
}

MODULE_SCOPE void
TkMacOSXPrintWindowTitle(char * tag, WindowRef window )
{
    Str255 title;
    GetWTitle(window,title);
    title [title[0] + 1] = 0;
    TkMacOSXDbgMsg("%s %s", tag, title +1 );
}

typedef struct {
 int	msg;
 char * name;
} MsgName;

static MsgName msgNames [] = {
    { kMenuDrawMsg,	  "Draw"},
    { kMenuSizeMsg,	  "Size"},
    { kMenuPopUpMsg,	  "PopUp"},
    { kMenuCalcItemMsg,	  "CalcItem" },
    { kMenuThemeSavvyMsg, "ThemeSavvy"},
    { kMenuInitMsg,	  "Init" },
    { kMenuDisposeMsg,	  "Dispose" },
    { kMenuFindItemMsg,	  "FindItem" },
    { kMenuHiliteItemMsg, "HiliteItem" },
    { kMenuDrawItemsMsg,  "DrawItems" },
    { -1, NULL }
};

MODULE_SCOPE char *
TkMacOSXMenuMessageToAscii(int msg, char * s)
{
    MsgName * msgNamePtr;
    for (msgNamePtr = msgNames;msgNamePtr->name;) {
	if (msgNamePtr->msg == msg) {
	   strcpy(s,msgNamePtr->name);
	   return s;
	} else {
	    msgNamePtr++;
	}
    }
    sprintf(s,"unknown : %d", msg );
    return s;
}

static MsgName trackingNames [] = {
    { kMouseTrackingMousePressed  , "MousePressed  " },
    { kMouseTrackingMouseReleased , "MouseReleased " },
    { kMouseTrackingMouseExited	  , "MouseExited   " },
    { kMouseTrackingMouseEntered  , "MouseEntered  " },
    { kMouseTrackingMouseMoved	  , "MouseMoved	   " },
    { kMouseTrackingKeyModifiersChanged, "KeyModifiersChanged" },
    { kMouseTrackingUserCancelled , "UserCancelled " },
    { kMouseTrackingTimedOut	  , "TimedOut	   " },
    { -1, NULL }
};

MODULE_SCOPE char *
TkMacOSXMouseTrackingResultToAscii(MouseTrackingResult r, char * buf)
{
    MsgName * namePtr;
    for (namePtr = trackingNames; namePtr->name; namePtr++) {
	if (namePtr->msg == r) {
	    strcpy(buf, namePtr->name);
	    return buf;
	}
    }
    sprintf(buf, "Unknown mouse tracking result : %d", r);
    return buf;
}
#endif /* TK_MACOSXDEBUG_UNUSED */

MODULE_SCOPE void
TkMacOSXDebugFlashRegion(
    Drawable d,
    HIShapeRef rgn)
{
    TkMacOSXInitNamedDebugSymbol(HIToolbox, int, QDDebugFlashRegion,
	    CGrafPtr port, RgnHandle region);
    CFShow(rgn);
    if (d && rgn && QDDebugFlashRegion && !HIShapeIsEmpty(rgn)) {
	CGrafPtr port = TkMacOSXGetDrawablePort(d);

	if (port) {
	    static RgnHandle qdRgn = NULL;

	    if (!qdRgn) {
		qdRgn = NewRgn();
	    }
	    ChkErr(HIShapeGetAsQDRgn, rgn, qdRgn);

	    /*
	     * Carbon-internal region flashing SPI (c.f. Technote 2124)
	     */

	    QDDebugFlashRegion(port, qdRgn);
	    SetEmptyRgn(qdRgn);
	}
    }
}

#include <mach-o/dyld.h>
#include <mach-o/nlist.h>

/*
 *----------------------------------------------------------------------
 *
 * TkMacOSXGetNamedDebugSymbol --
 *
 *
 *	Dynamically acquire address of a named symbol from a loaded
 *	dynamic library, so that we can use API that may not be
 *	available on all OS versions.
 *	For debugging purposes, if we cannot find the symbol with the
 *	usual dynamic library APIs, we manually walk the symbol table
 *	of the loaded library. This allows access to unexported
 *	symbols such as private_extern internal debugging functions.
 *	If module is NULL or the empty string, search all loaded
 *	libraries (could be very expensive and should be avoided).
 *
 *	THIS FUCTION IS ONLY TO BE USED FOR DEBUGGING PURPOSES, IT MAY
 *	BREAK UNEXPECTEDLY IN THE FUTURE !
 *
 * Results:
 *	Address of given symbol or NULL if unavailable.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

MODULE_SCOPE void *
TkMacOSXGetNamedDebugSymbol(
    const char* module,
    const char* symbol)
{
    void* addr = TkMacOSXGetNamedSymbol(module, symbol);
#ifndef __LP64__
    if (!addr) {
	const struct mach_header *mh = NULL;
	uint32_t i, n = _dyld_image_count();
	size_t module_len = 0;

	if (module && *module) {
	    module_len = strlen(module);
	}
	for (i = 0; i < n; i++) {
	    if (module && *module) {
		/* Find image with given module name */
		char *name;
		const char *path = _dyld_get_image_name(i);

		if (!path) {
		    continue;
		}
		name = strrchr(path, '/') + 1;
		if (strncmp(name, module, module_len) != 0) {
		    continue;
		}
	    }
	    mh = _dyld_get_image_header(i);
	    if (mh) {
		struct load_command *lc;
		struct symtab_command *st = NULL;
		struct segment_command *sg = NULL;
		uint32_t j, m, nsect = 0, txtsectx = 0;

		lc = (struct load_command*)((const char*) mh +
			sizeof(struct mach_header));
		m = mh->ncmds;
		for (j = 0; j < m; j++) {
		    /* Find symbol table and index of __text section */
		    if (lc->cmd == LC_SEGMENT) {
			/* Find last segment before symbol table */
			sg = (struct segment_command*) lc;
			if (!txtsectx) {
			    /* Count total sections until (__TEXT, __text) */
			    uint32_t k, ns = sg->nsects;

			    if (strcmp(sg->segname, SEG_TEXT) == 0) {
				struct section *s = (struct section *)(
					(char *)sg +
					sizeof(struct segment_command));

				for(k = 0; k < ns; k++) {
				    if (strcmp(s->sectname, SECT_TEXT) == 0) {
					txtsectx = nsect+k+1;
					break;
				    }
				    s++;
				}
			    }
			    nsect += ns;
			}
		    } else if (!st && lc->cmd == LC_SYMTAB) {
			st = (struct symtab_command*) lc;
			break;
		    }
		    lc = (struct load_command *)((char *) lc + lc->cmdsize);
		}
		if (st && sg && txtsectx) {
		    intptr_t base, slide = _dyld_get_image_vmaddr_slide(i);
		    char *strings;
		    struct nlist *sym;
		    uint32_t strsize = st->strsize;
		    int32_t strx;

		    /* Offset file positions by difference to actual position
		       in memory of last segment before symbol table: */
		    base = (intptr_t) sg->vmaddr + slide - sg->fileoff;
		    strings = (char*)(base + st->stroff);
		    sym = (struct nlist*)(base + st->symoff);
		    m = st->nsyms;
		    for (j = 0; j < m; j++) {
			/* Find symbol with given name in __text section */
			strx = sym->n_un.n_strx;
			if ((sym->n_type & N_TYPE) == N_SECT &&
				sym->n_sect == txtsectx &&
				strx > 0 && (uint32_t) strx < strsize &&
				strcmp(strings + strx, symbol) == 0) {
			    addr = (char*) sym->n_value + slide;
			    break;
			}
			sym++;
		    }
		}
	    }
	    if (module && *module) {
		/* If given a module name, only search corresponding image */
		break;
	    }
	}
    }
#endif /* __LP64__ */
    return addr;
}

#endif /* TK_MAC_DEBUG */
