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81345fd691
next few weeks. I'm going through the DFLAT api doc and fixing the export names and then going to try to build a simple hello dflat application. svn path=/trunk/; revision=2844
718 lines
22 KiB
C
718 lines
22 KiB
C
/* ------------ helpbox.c ----------- */
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#include "dflat32/dflat.h"
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#include "dflat32/htree.h"
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extern DBOX HelpBox;
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/* -------- strings of D-Flat classes for calling default
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help text collections -------- */
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char *ClassNames[] = {
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#undef ClassDef
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#define ClassDef(c,b,p,a) #c,
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#include "dflat32/classes.h"
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NULL
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};
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#define MAXHEIGHT (DfGetScreenHeight()-10)
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/* --------- linked list of help text collections -------- */
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struct helps {
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char *hname;
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char *NextName;
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char *PrevName;
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long hptr;
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int bit;
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int hheight;
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int hwidth;
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DFWINDOW hwnd;
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struct helps *NextHelp;
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};
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static struct helps *FirstHelp;
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static struct helps *LastHelp;
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static struct helps *ThisHelp;
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/* --- linked stack of help windows that have beed used --- */
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struct HelpStack {
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char *hname;
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struct HelpStack *PrevStack;
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};
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static struct HelpStack *LastStack;
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static struct HelpStack *ThisStack;
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/* --- linked list of keywords in the current help
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text collection (listhead is in window) -------- */
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struct keywords {
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char *hname;
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int lineno;
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int off1, off2, off3;
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int isDefinition;
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struct keywords *nextword;
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struct keywords *prevword;
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};
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static FILE *helpfp;
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static char hline [160];
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static BOOL Helping;
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static void SelectHelp(DFWINDOW, char *);
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static void ReadHelp(DFWINDOW);
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static void FindHelp(char *);
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static void FindHelpWindow(DFWINDOW);
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static void DisplayDefinition(DFWINDOW, char *);
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static void BestFit(DFWINDOW, DIALOGWINDOW *);
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/* ------------- CREATE_WINDOW message ------------ */
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static void CreateWindowMsg(DFWINDOW wnd)
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{
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Helping = TRUE;
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GetClass(wnd) = HELPBOX;
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InitWindowColors(wnd);
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if (ThisHelp != NULL)
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ThisHelp->hwnd = wnd;
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}
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/* ------------- COMMAND message ------------ */
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static BOOL CommandMsg(DFWINDOW wnd, PARAM p1)
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{
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switch ((int)p1) {
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case ID_CANCEL:
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ThisStack = LastStack;
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while (ThisStack != NULL) {
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LastStack = ThisStack->PrevStack;
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if (ThisStack->hname != NULL)
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free(ThisStack->hname);
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free(ThisStack);
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ThisStack = LastStack;
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}
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break;
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case ID_PREV:
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FindHelpWindow(wnd);
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if (ThisHelp != NULL)
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SelectHelp(wnd, ThisHelp->PrevName);
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return TRUE;
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case ID_NEXT:
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FindHelpWindow(wnd);
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if (ThisHelp != NULL)
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SelectHelp(wnd, ThisHelp->NextName);
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return TRUE;
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case ID_BACK:
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if (LastStack != NULL) {
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if (LastStack->PrevStack != NULL) {
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ThisStack = LastStack->PrevStack;
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if (LastStack->hname != NULL)
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free(LastStack->hname);
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free(LastStack);
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LastStack = ThisStack;
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SelectHelp(wnd, ThisStack->hname);
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}
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}
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return TRUE;
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default:
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break;
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}
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return FALSE;
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}
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/* ------------- KEYBOARD message ------------ */
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static BOOL KeyboardMsg(DFWINDOW wnd, PARAM p1)
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{
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DFWINDOW cwnd;
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struct keywords *thisword;
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static char HelpName[50];
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cwnd = ControlWindow(wnd->extension, ID_HELPTEXT);
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if (cwnd == NULL || inFocus != cwnd)
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return FALSE;
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thisword = cwnd->thisword;
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switch ((int)p1) {
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case '\r':
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if (thisword != NULL) {
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if (thisword->isDefinition)
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DisplayDefinition(GetParent(wnd),
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thisword->hname);
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else {
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strncpy(HelpName, thisword->hname,
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sizeof HelpName);
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SelectHelp(wnd, HelpName);
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}
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}
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return TRUE;
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case '\t':
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if (thisword == NULL)
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thisword = cwnd->firstword;
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else {
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if (thisword->nextword == NULL)
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thisword = cwnd->firstword;
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else
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thisword = thisword->nextword;
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}
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break;
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case SHIFT_HT:
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if (thisword == NULL)
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thisword = cwnd->lastword;
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else {
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if (thisword->prevword == NULL)
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thisword = cwnd->lastword;
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else
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thisword = thisword->prevword;
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}
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break;
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default:
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thisword = NULL;
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break;
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}
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if (thisword != NULL) {
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cwnd->thisword = thisword;
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if (thisword->lineno < cwnd->wtop ||
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thisword->lineno >=
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cwnd->wtop + ClientHeight(cwnd)) {
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int distance = ClientHeight(cwnd)/2;
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do {
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cwnd->wtop = thisword->lineno-distance;
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distance /= 2;
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}
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while (cwnd->wtop < 0);
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}
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DfSendMessage(cwnd, PAINT, 0, 0);
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return TRUE;
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}
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return FALSE;
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}
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/* ---- window processing module for the HELPBOX ------- */
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int HelpBoxProc(DFWINDOW wnd, DFMESSAGE msg, PARAM p1, PARAM p2)
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{
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DBOX *db = wnd->extension;
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switch (msg) {
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case CREATE_WINDOW:
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CreateWindowMsg(wnd);
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break;
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case INITIATE_DIALOG:
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ReadHelp(wnd);
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break;
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case DFM_COMMAND:
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if (p2 != 0)
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break;
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if (CommandMsg(wnd, p1))
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return TRUE;
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break;
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case KEYBOARD:
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if (WindowMoving)
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break;
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if (KeyboardMsg(wnd, p1))
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return TRUE;
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break;
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case CLOSE_WINDOW:
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if (db != NULL) {
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if (db->dwnd.title != NULL) {
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free(db->dwnd.title);
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db->dwnd.title = NULL;
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}
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}
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FindHelpWindow(wnd);
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if (ThisHelp != NULL)
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ThisHelp->hwnd = NULL;
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Helping = FALSE;
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break;
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default:
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break;
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}
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return BaseWndProc(HELPBOX, wnd, msg, p1, p2);
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}
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/* ----- select a new help window from its name ----- */
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static void SelectHelp(DFWINDOW wnd, char *hname)
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{
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if (hname != NULL) {
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DFWINDOW pwnd = GetParent(wnd);
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DfPostMessage(wnd, ENDDIALOG, 0, 0);
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DfPostMessage(pwnd, DISPLAY_HELP, (PARAM) hname, 0);
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}
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}
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/* ---- PAINT message for the helpbox text editbox ---- */
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static int PaintMsg(DFWINDOW wnd, PARAM p1, PARAM p2)
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{
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struct keywords *thisword;
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int rtn;
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if (wnd->thisword != NULL) {
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DFWINDOW pwnd = GetParent(wnd);
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char *cp;
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thisword = wnd->thisword;
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cp = TextLine(wnd, thisword->lineno);
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cp += thisword->off1;
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*(cp+1) =
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(pwnd->WindowColors[SELECT_COLOR][FG] & 255) | 0x80;
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*(cp+2) =
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(pwnd->WindowColors[SELECT_COLOR][BG] & 255) | 0x80;
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rtn = DefaultWndProc(wnd, PAINT, p1, p2);
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*(cp+1) =
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(pwnd->WindowColors[HILITE_COLOR][FG] & 255) | 0x80;
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*(cp+2) =
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(pwnd->WindowColors[HILITE_COLOR][BG] & 255) | 0x80;
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return rtn;
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}
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return DefaultWndProc(wnd, PAINT, p1, p2);
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}
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/* ---- LEFT_BUTTON message for the helpbox text editbox ---- */
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static int LeftButtonMsg(DFWINDOW wnd, PARAM p1, PARAM p2)
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{
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struct keywords *thisword;
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int rtn, mx, my;
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rtn = DefaultWndProc(wnd, LEFT_BUTTON, p1, p2);
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mx = (int)p1 - GetClientLeft(wnd);
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my = (int)p2 - GetClientTop(wnd);
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my += wnd->wtop;
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thisword = wnd->firstword;
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while (thisword != NULL) {
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if (my == thisword->lineno) {
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if (mx >= thisword->off2 &&
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mx < thisword->off3) {
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wnd->thisword = thisword;
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DfSendMessage(wnd, PAINT, 0, 0);
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if (thisword->isDefinition) {
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DFWINDOW pwnd = GetParent(wnd);
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if (pwnd != NULL)
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DisplayDefinition(GetParent(pwnd),
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thisword->hname);
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}
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break;
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}
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}
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thisword = thisword->nextword;
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}
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return rtn;
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}
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/* --- window processing module for HELPBOX's text EDITBOX -- */
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int HelpTextProc(DFWINDOW wnd, DFMESSAGE msg, PARAM p1, PARAM p2)
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{
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struct keywords *thisword;
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switch (msg) {
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case PAINT:
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return PaintMsg(wnd, p1, p2);
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case LEFT_BUTTON:
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return LeftButtonMsg(wnd, p1, p2);
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case DOUBLE_CLICK:
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DfPostMessage(wnd, KEYBOARD, '\r', 0);
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break;
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case CLOSE_WINDOW:
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thisword = wnd->firstword;
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while (thisword != NULL) {
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struct keywords *nextword = thisword->nextword;
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if (thisword->hname != NULL)
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free(thisword->hname);
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free(thisword);
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thisword = nextword;
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}
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break;
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default:
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break;
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}
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return DefaultWndProc(wnd, msg, p1, p2);
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}
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/* -------- read the help text into the editbox ------- */
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static void ReadHelp(DFWINDOW wnd)
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{
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DFWINDOW cwnd = ControlWindow(wnd->extension, ID_HELPTEXT);
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int linectr = 0;
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if (cwnd == NULL)
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return;
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cwnd->wndproc = HelpTextProc;
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/* ----- read the help text ------- */
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while (TRUE) {
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unsigned char *cp = hline, *cp1;
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int colorct = 0;
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if (GetHelpLine(hline) == NULL)
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break;
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if (*hline == '<')
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break;
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hline[strlen(hline)-1] = '\0';
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/* --- add help text to the help window --- */
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while (cp != NULL) {
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if ((cp = strchr(cp, '[')) != NULL) {
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/* ----- hit a new key word ----- */
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struct keywords *thisword;
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if (*(cp+1) != '.' && *(cp+1) != '*') {
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cp++;
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continue;
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}
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thisword = DFcalloc(1, sizeof(struct keywords));
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if (cwnd->firstword == NULL)
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cwnd->firstword = thisword;
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if (cwnd->lastword != NULL) {
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((struct keywords *)
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(cwnd->lastword))->nextword = thisword;
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thisword->prevword = cwnd->lastword;
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}
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cwnd->lastword = thisword;
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thisword->lineno = cwnd->wlines;
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thisword->off1 = (int) ((int)cp - (int)hline);
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thisword->off2 = thisword->off1 - colorct * 4;
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thisword->isDefinition = *(cp+1) == '*';
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colorct++;
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*cp++ = CHANGECOLOR;
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*cp++ =
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(wnd->WindowColors [HILITE_COLOR] [FG] & 255) | 0x80;
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*cp++ =
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(wnd->WindowColors [HILITE_COLOR] [BG] & 255) | 0x80;
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cp1 = cp;
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if ((cp = strchr(cp, ']')) != NULL) {
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if (thisword != NULL)
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thisword->off3 =
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thisword->off2 + (int) (cp - cp1);
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*cp++ = RESETCOLOR;
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}
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if ((cp = strchr(cp, '<')) != NULL) {
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char *cp1 = strchr(cp, '>');
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if (cp1 != NULL) {
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int len = (int) ((int)cp1 - (int)cp);
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thisword->hname = DFcalloc(1, len);
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strncpy(thisword->hname, cp+1, len-1);
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memmove(cp, cp1+1, strlen(cp1));
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}
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}
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}
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}
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PutItemText(wnd, ID_HELPTEXT, hline);
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/* -- display help text as soon as window is full -- */
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if (++linectr == ClientHeight(cwnd))
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DfSendMessage(cwnd, PAINT, 0, 0);
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if (linectr > ClientHeight(cwnd) &&
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!TestAttribute(cwnd, VSCROLLBAR)) {
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AddAttribute(cwnd, VSCROLLBAR);
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DfSendMessage(cwnd, BORDER, 0, 0);
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}
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}
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}
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/* ---- compute the displayed length of a help text line --- */
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static int HelpLength(char *s)
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{
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int len = strlen(s);
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char *cp = strchr(s, '[');
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while (cp != NULL) {
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len -= 4;
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cp = strchr(cp+1, '[');
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}
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cp = strchr(s, '<');
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while (cp != NULL) {
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char *cp1 = strchr(cp, '>');
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if (cp1 != NULL)
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len -= (int) (cp1-cp)+1;
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cp = strchr(cp1, '<');
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}
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return len;
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}
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/* ----------- load the help text file ------------ */
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void LoadHelpFile()
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{
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char *cp;
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if (Helping)
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return;
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UnLoadHelpFile();
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if ((helpfp = OpenHelpFile()) == NULL)
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return;
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*hline = '\0';
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while (*hline != '<') {
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if (GetHelpLine(hline) == NULL) {
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fclose(helpfp);
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return;
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}
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}
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while (*hline == '<') {
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if (strncmp(hline, "<end>", 5) == 0)
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break;
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/* -------- parse the help window's text name ----- */
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if ((cp = strchr(hline, '>')) != NULL) {
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ThisHelp = DFcalloc(1, sizeof(struct helps));
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if (FirstHelp == NULL)
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FirstHelp = ThisHelp;
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*cp = '\0';
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ThisHelp->hname=DFmalloc(strlen(hline+1)+1);
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strcpy(ThisHelp->hname, hline+1);
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HelpFilePosition(&ThisHelp->hptr, &ThisHelp->bit);
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if (GetHelpLine(hline) == NULL)
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break;
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/* ------- build the help linked list entry --- */
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while (*hline == '[') {
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HelpFilePosition(&ThisHelp->hptr,
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&ThisHelp->bit);
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/* ---- parse the <<prev button pointer ---- */
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if (strncmp(hline, "[<<]", 4) == 0) {
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char *cp = strchr(hline+4, '<');
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if (cp != NULL) {
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char *cp1 = strchr(cp, '>');
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if (cp1 != NULL) {
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int len = (int) (cp1-cp);
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ThisHelp->PrevName=DFcalloc(1,len);
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strncpy(ThisHelp->PrevName,
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cp+1,len-1);
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}
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}
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if (GetHelpLine(hline) == NULL)
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break;
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continue;
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}
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/* ---- parse the next>> button pointer ---- */
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else if (strncmp(hline, "[>>]", 4) == 0) {
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char *cp = strchr(hline+4, '<');
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if (cp != NULL) {
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char *cp1 = strchr(cp, '>');
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if (cp1 != NULL) {
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int len = (int) (cp1-cp);
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ThisHelp->NextName=DFcalloc(1,len);
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strncpy(ThisHelp->NextName,
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cp+1,len-1);
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}
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}
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if (GetHelpLine(hline) == NULL)
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break;
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continue;
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}
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else
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break;
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}
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ThisHelp->hheight = 0;
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ThisHelp->hwidth = 0;
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ThisHelp->NextHelp = NULL;
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/* ------ append entry to the linked list ------ */
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if (LastHelp != NULL)
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LastHelp->NextHelp = ThisHelp;
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LastHelp = ThisHelp;
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}
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/* -------- move to the next <helpname> token ------ */
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if (GetHelpLine(hline) == NULL)
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strcpy(hline, "<end>");
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while (*hline != '<') {
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ThisHelp->hwidth =
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max(ThisHelp->hwidth, HelpLength(hline));
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ThisHelp->hheight++;
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if (GetHelpLine(hline) == NULL)
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strcpy(hline, "<end>");
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}
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}
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fclose(helpfp);
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}
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/* ------ free the memory used by the help file table ------ */
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void UnLoadHelpFile(void)
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{
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while (FirstHelp != NULL) {
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ThisHelp = FirstHelp;
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if (ThisHelp->hname != NULL)
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free(ThisHelp->hname);
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if (ThisHelp->PrevName != NULL)
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free(ThisHelp->PrevName);
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if (ThisHelp->NextName != NULL)
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free(ThisHelp->NextName);
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FirstHelp = ThisHelp->NextHelp;
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free(ThisHelp);
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}
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ThisHelp = LastHelp = NULL;
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free(HelpTree);
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HelpTree = NULL;
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}
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/* ---------- display a specified help text ----------- */
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BOOL DisplayHelp(DFWINDOW wnd, char *Help)
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{
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BOOL rtn = FALSE;
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if (Helping)
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|
return TRUE;
|
|
wnd->isHelping++;
|
|
FindHelp(Help);
|
|
if (ThisHelp != NULL) {
|
|
if (LastStack == NULL ||
|
|
stricmp(Help, LastStack->hname)) {
|
|
/* ---- add the window to the history stack ---- */
|
|
ThisStack = DFcalloc(1,sizeof(struct HelpStack));
|
|
ThisStack->hname = DFmalloc(strlen(Help)+1);
|
|
if (ThisStack->hname != NULL)
|
|
strcpy(ThisStack->hname, Help);
|
|
ThisStack->PrevStack = LastStack;
|
|
LastStack = ThisStack;
|
|
}
|
|
if ((helpfp = OpenHelpFile()) != NULL) {
|
|
DBOX *db;
|
|
int offset, i;
|
|
|
|
db = DFcalloc(1,sizeof HelpBox);
|
|
memcpy(db, &HelpBox, sizeof HelpBox);
|
|
/* -- seek to the first line of the help text -- */
|
|
SeekHelpLine(ThisHelp->hptr, ThisHelp->bit);
|
|
/* ----- read the title ----- */
|
|
GetHelpLine(hline);
|
|
hline[strlen(hline)-1] = '\0';
|
|
db->dwnd.title = DFmalloc(strlen(hline)+1);
|
|
strcpy(db->dwnd.title, hline);
|
|
/* ----- set the height and width ----- */
|
|
db->dwnd.h = min(ThisHelp->hheight, MAXHEIGHT)+7;
|
|
db->dwnd.w = max(45, ThisHelp->hwidth+6);
|
|
/* ------ position the help window ----- */
|
|
BestFit(wnd, &db->dwnd);
|
|
/* ------- position the command buttons ------ */
|
|
db->ctl[0].dwnd.w = max(40, ThisHelp->hwidth+2);
|
|
db->ctl[0].dwnd.h =
|
|
min(ThisHelp->hheight, MAXHEIGHT)+2;
|
|
offset = (db->dwnd.w-40) / 2;
|
|
for (i = 1; i < 5; i++) {
|
|
db->ctl[i].dwnd.y =
|
|
min(ThisHelp->hheight, MAXHEIGHT)+3;
|
|
db->ctl[i].dwnd.x += offset;
|
|
}
|
|
/* ---- disable ineffective buttons ---- */
|
|
if (ThisStack != NULL)
|
|
if (ThisStack->PrevStack == NULL)
|
|
DisableButton(db, ID_BACK);
|
|
if (ThisHelp->NextName == NULL)
|
|
DisableButton(db, ID_NEXT);
|
|
if (ThisHelp->PrevName == NULL)
|
|
DisableButton(db, ID_PREV);
|
|
/* ------- display the help window ----- */
|
|
DfDialogBox(NULL, db, TRUE, HelpBoxProc);
|
|
free(db);
|
|
fclose(helpfp);
|
|
rtn = TRUE;
|
|
}
|
|
}
|
|
--wnd->isHelping;
|
|
return rtn;
|
|
}
|
|
|
|
/* ------- display a definition window --------- */
|
|
static void DisplayDefinition(DFWINDOW wnd, char *def)
|
|
{
|
|
DFWINDOW dwnd;
|
|
DFWINDOW hwnd = wnd;
|
|
int y;
|
|
|
|
if (GetClass(wnd) == POPDOWNMENU)
|
|
hwnd = GetParent(wnd);
|
|
y = GetClass(hwnd) == MENUBAR ? 2 : 1;
|
|
FindHelp(def);
|
|
if (ThisHelp != NULL) {
|
|
if ((helpfp = OpenHelpFile()) != NULL) {
|
|
dwnd = DfCreateWindow(
|
|
TEXTBOX,
|
|
NULL,
|
|
GetClientLeft(hwnd),
|
|
GetClientTop(hwnd)+y,
|
|
min(ThisHelp->hheight, MAXHEIGHT)+3,
|
|
ThisHelp->hwidth+2,
|
|
NULL,
|
|
wnd,
|
|
NULL,
|
|
HASBORDER | NOCLIP | SAVESELF);
|
|
if (dwnd != NULL) {
|
|
/* ----- read the help text ------- */
|
|
SeekHelpLine(ThisHelp->hptr, ThisHelp->bit);
|
|
while (TRUE) {
|
|
if (GetHelpLine(hline) == NULL)
|
|
break;
|
|
if (*hline == '<')
|
|
break;
|
|
hline[strlen(hline)-1] = '\0';
|
|
DfSendMessage(dwnd,ADDTEXT,(PARAM)hline,0);
|
|
}
|
|
DfSendMessage(dwnd, SHOW_WINDOW, 0, 0);
|
|
DfSendMessage(NULL, WAITKEYBOARD, 0, 0);
|
|
DfSendMessage(NULL, WAITMOUSE, 0, 0);
|
|
DfSendMessage(dwnd, CLOSE_WINDOW, 0, 0);
|
|
}
|
|
fclose(helpfp);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* ------ compare help names with wild cards ----- */
|
|
static BOOL wildcmp(char *s1, char *s2)
|
|
{
|
|
while (*s1 || *s2) {
|
|
if (tolower(*s1) != tolower(*s2))
|
|
if (*s1 != '?' && *s2 != '?')
|
|
return TRUE;
|
|
s1++, s2++;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
/* --- ThisHelp = the help window matching specified name --- */
|
|
static void FindHelp(char *Help)
|
|
{
|
|
ThisHelp = FirstHelp;
|
|
while (ThisHelp != NULL) {
|
|
if (wildcmp(Help, ThisHelp->hname) == FALSE)
|
|
break;
|
|
ThisHelp = ThisHelp->NextHelp;
|
|
}
|
|
}
|
|
|
|
/* --- ThisHelp = the help window matching specified wnd --- */
|
|
static void FindHelpWindow(DFWINDOW wnd)
|
|
{
|
|
ThisHelp = FirstHelp;
|
|
while (ThisHelp != NULL) {
|
|
if (wnd == ThisHelp->hwnd)
|
|
break;
|
|
ThisHelp = ThisHelp->NextHelp;
|
|
}
|
|
}
|
|
|
|
static int OverLap(int a, int b)
|
|
{
|
|
int ov = a - b;
|
|
if (ov < 0)
|
|
ov = 0;
|
|
return ov;
|
|
}
|
|
|
|
/* ----- compute the best location for a help dialogbox ----- */
|
|
static void BestFit(DFWINDOW wnd, DIALOGWINDOW *dwnd)
|
|
{
|
|
int above, below, right, left;
|
|
if (GetClass(wnd) == MENUBAR ||
|
|
GetClass(wnd) == APPLICATION) {
|
|
dwnd->x = dwnd->y = -1;
|
|
return;
|
|
}
|
|
/* --- compute above overlap ---- */
|
|
above = OverLap(dwnd->h, GetTop(wnd));
|
|
/* --- compute below overlap ---- */
|
|
below = OverLap(GetBottom(wnd), DfGetScreenHeight()-dwnd->h);
|
|
/* --- compute right overlap ---- */
|
|
right = OverLap(GetRight(wnd), DfGetScreenWidth()-dwnd->w);
|
|
/* --- compute left overlap ---- */
|
|
left = OverLap(dwnd->w, GetLeft(wnd));
|
|
|
|
if (above < below)
|
|
dwnd->y = max(0, GetTop(wnd)-dwnd->h-2);
|
|
else
|
|
dwnd->y = min(DfGetScreenHeight()-dwnd->h, GetBottom(wnd)+2);
|
|
if (right < left)
|
|
dwnd->x = min(GetRight(wnd)+2, DfGetScreenWidth()-dwnd->w);
|
|
else
|
|
dwnd->x = max(0, GetLeft(wnd)-dwnd->w-2);
|
|
|
|
if (dwnd->x == GetRight(wnd)+2 ||
|
|
dwnd->x == GetLeft(wnd)-dwnd->w-2)
|
|
dwnd->y = -1;
|
|
if (dwnd->y ==GetTop(wnd)-dwnd->h-2 ||
|
|
dwnd->y == GetBottom(wnd)+2)
|
|
dwnd->x = -1;
|
|
}
|
|
|
|
/* EOF */
|