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395 lines
10 KiB
395 lines
10 KiB
/*++
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Copyright (c) 1993 Microsoft Corporation
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Module Name:
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sphelp.c
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Abstract:
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Routines for displaying on-line help during text setup.
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Author:
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Ted Miller (tedm) 2-Aug-1993
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Revision History:
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--*/
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#include "spprecmp.h"
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#pragma hdrstop
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#define MAX_HELP_SCREENS 100
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PWSTR HelpScreen[MAX_HELP_SCREENS+1];
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VOID
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SpHelp(
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IN ULONG MessageId, OPTIONAL
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IN PCWSTR FileText, OPTIONAL
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IN ULONG Flags
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)
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{
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UCHAR StatusAttribute, BackgroundAttribute, HeaderAttribute,
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ClientAttribute, ClientIntenseAttribute;
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PWSTR HelpText,p,q;
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ULONG ScreenCount;
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ULONG ValidKeys[8];
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ULONG CurrentScreen;
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ULONG y;
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BOOLEAN Intense;
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BOOLEAN Done;
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unsigned kc;
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//
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// Pick the video attributes we want
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//
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if(Flags & SPHELP_LICENSETEXT) {
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StatusAttribute = DEFAULT_STATUS_ATTRIBUTE;
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BackgroundAttribute = DEFAULT_BACKGROUND;
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HeaderAttribute = DEFAULT_ATTRIBUTE;
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ClientAttribute = DEFAULT_ATTRIBUTE;
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ClientIntenseAttribute = (ATT_FG_INTENSE | ATT_BG_INTENSE);
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} else {
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StatusAttribute = (ATT_FG_WHITE | ATT_BG_BLUE);
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BackgroundAttribute = ATT_WHITE;
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HeaderAttribute = (ATT_FG_BLUE | ATT_BG_WHITE);
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ClientAttribute = (ATT_FG_BLACK | ATT_BG_WHITE);
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ClientIntenseAttribute = (ATT_FG_BLUE | ATT_BG_WHITE);
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}
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//
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// Retreive the help text.
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//
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if (FileText) {
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HelpText = (PWSTR)FileText;
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} else {
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HelpText = SpRetreiveMessageText(NULL,MessageId,NULL,0);
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if (!HelpText) { // no way to return an error code, so fail quietly
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goto s0;
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}
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}
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//
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// Shop off extra blank lines in the text.
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//
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p = HelpText + wcslen(HelpText);
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while((p > HelpText) && SpIsSpace(*(p-1))) {
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p--;
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}
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if(q = wcschr(p,L'\n')) {
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*(++q) = 0;
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}
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//
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// Break up the help text into screens.
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// The maximum length of a help screen will be the client screen size
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// minus two lines for spacing. A %P alone at the beginning of a line
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// forces a page break.
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//
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for(p=HelpText,ScreenCount=0; (p && *p); ) {
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//
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// Mark the start of a new screen.
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//
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HelpScreen[ScreenCount++] = p;
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//
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// Count lines in the help text.
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//
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for(y=0; (p && *p); ) {
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//
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// Determine whether this line is really a hard page break
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// or if we have exhausted the number of lines allowed on a screen.
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//
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if(((p[0] == L'%') && (p[1] == 'P')) || (++y == CLIENT_HEIGHT-2)) {
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break;
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}
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//
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// Find next line start.
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//
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if(q = wcschr(p,L'\r')) {
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p = q + 2;
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} else {
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p = wcschr(p,0);
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}
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}
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//
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// Find the end of the line that broke us out of the loop
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// and then the start of the next line (if any).
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//
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if(q = wcschr(p,L'\r')) {
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p = q + 2;
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} else {
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p = wcschr(p,0);
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}
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if(ScreenCount == MAX_HELP_SCREENS) {
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break;
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}
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}
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//
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// Sentinal value: point to the terminating nul byte.
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//
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HelpScreen[ScreenCount] = p;
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//
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// Display header text in blue on white.
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//
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SpvidClearScreenRegion(0,0,VideoVars.ScreenWidth,HEADER_HEIGHT,BackgroundAttribute);
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if(Flags & SPHELP_LICENSETEXT) {
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SpDisplayHeaderText(SP_HEAD_LICENSE,HeaderAttribute);
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} else {
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SpDisplayHeaderText(SP_HEAD_HELP,HeaderAttribute);
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}
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//
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// The first screen to display is screen 0.
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//
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CurrentScreen = 0;
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Done = FALSE;
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do {
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SpvidClearScreenRegion(
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0,
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HEADER_HEIGHT,
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VideoVars.ScreenWidth,
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VideoVars.ScreenHeight-(HEADER_HEIGHT+STATUS_HEIGHT),
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BackgroundAttribute
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);
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//
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// Display the current screen.
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//
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for(y=HEADER_HEIGHT+1, p=HelpScreen[CurrentScreen]; *p && (p < HelpScreen[CurrentScreen+1]); y++) {
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Intense = FALSE;
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if(p[0] == L'%') {
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if(p[1] == L'I') {
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Intense = TRUE;
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p += 2;
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} else {
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if(p[1] == L'P') {
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p += 2; // don't display %P
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}
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}
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}
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q = wcschr(p,L'\r');
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if(q) {
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*q = 0;
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}
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SpvidDisplayString(
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p,
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(UCHAR)(Intense ? ClientIntenseAttribute : ClientAttribute),
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3,
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y
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);
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if(q) {
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*q = '\r';
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p = q + 2;
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} else {
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p = wcschr(p,0);
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}
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}
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//
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// Construct a list of valid keypresses from the user, depending
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// on whether this is the first, last, etc. screen.
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//
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// If there are previous screens, BACKSPACE=Read Last Help is an option.
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// If there are additional screens, ENTER=Continue Reading Help is an option.
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// ESC=Cancel Help is always an option for help text.
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//
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// For licensing text, we allow pageup/pagedown when appropriate,
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// and on the last page we allow accept/reject.
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//
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kc = 0;
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if(Flags & SPHELP_LICENSETEXT) {
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ValidKeys[kc++] = KEY_F8;
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ValidKeys[kc++] = ASCI_ESC;
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if(CurrentScreen) {
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ValidKeys[kc++] = KEY_PAGEUP;
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}
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if(CurrentScreen < ScreenCount-1) {
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ValidKeys[kc++] = KEY_PAGEDOWN;
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}
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} else {
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ValidKeys[kc++] = ASCI_ESC;
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if(CurrentScreen) {
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ValidKeys[kc++] = ASCI_BS;
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ValidKeys[kc++] = KEY_PAGEUP;
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}
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if(CurrentScreen < ScreenCount-1) {
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ValidKeys[kc++] = ASCI_CR;
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ValidKeys[kc++] = KEY_PAGEDOWN;
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}
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}
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ValidKeys[kc] = 0;
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if(CurrentScreen && (CurrentScreen < ScreenCount-1)) {
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//
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// There are screens before and after this one.
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//
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if(Flags & SPHELP_LICENSETEXT) {
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SpDisplayStatusOptions(
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StatusAttribute,
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SP_STAT_X_EQUALS_ACCEPT_LICENSE,
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SP_STAT_X_EQUALS_REJECT_LICENSE,
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SP_STAT_PAGEDOWN_EQUALS_NEXT_LIC,
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SP_STAT_PAGEUP_EQUALS_PREV_LIC,
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0
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);
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} else {
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SpDisplayStatusOptions(
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StatusAttribute,
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SP_STAT_ENTER_EQUALS_CONTINUE_HELP,
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SP_STAT_BACKSP_EQUALS_PREV_HELP,
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SP_STAT_ESC_EQUALS_CANCEL_HELP,
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0
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);
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}
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} else {
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if(CurrentScreen) {
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//
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// This is the last page but not the only page.
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//
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if(Flags & SPHELP_LICENSETEXT) {
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SpDisplayStatusOptions(
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StatusAttribute,
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SP_STAT_X_EQUALS_ACCEPT_LICENSE,
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SP_STAT_X_EQUALS_REJECT_LICENSE,
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SP_STAT_PAGEUP_EQUALS_PREV_LIC,
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0
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);
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} else {
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SpDisplayStatusOptions(
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StatusAttribute,
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SP_STAT_BACKSP_EQUALS_PREV_HELP,
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SP_STAT_ESC_EQUALS_CANCEL_HELP,
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0
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);
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}
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} else {
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if(CurrentScreen < ScreenCount-1) {
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//
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// This is the first page but additional pages exist.
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//
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if(Flags & SPHELP_LICENSETEXT) {
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SpDisplayStatusOptions(
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StatusAttribute,
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SP_STAT_X_EQUALS_ACCEPT_LICENSE,
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SP_STAT_X_EQUALS_REJECT_LICENSE,
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SP_STAT_PAGEDOWN_EQUALS_NEXT_LIC,
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0
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);
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} else {
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SpDisplayStatusOptions(
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StatusAttribute,
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SP_STAT_ENTER_EQUALS_CONTINUE_HELP,
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SP_STAT_ESC_EQUALS_CANCEL_HELP,
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0
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);
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}
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} else {
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//
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// This is the only page.
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//
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if(Flags & SPHELP_LICENSETEXT) {
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SpDisplayStatusOptions(
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StatusAttribute,
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SP_STAT_X_EQUALS_ACCEPT_LICENSE,
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SP_STAT_X_EQUALS_REJECT_LICENSE,
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0
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);
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} else {
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SpDisplayStatusOptions(
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StatusAttribute,
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SP_STAT_ESC_EQUALS_CANCEL_HELP,
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0
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);
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}
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}
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}
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}
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switch(SpWaitValidKey(ValidKeys,NULL,NULL)) {
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case ASCI_ESC:
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if(Flags & SPHELP_LICENSETEXT) {
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SpDone(0,FALSE,TRUE);
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}
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// ELSE FALL THROUGH
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case KEY_F8:
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Done = TRUE;
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break;
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case KEY_PAGEUP:
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case ASCI_BS:
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ASSERT(CurrentScreen);
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CurrentScreen--;
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break;
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case KEY_PAGEDOWN:
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case ASCI_CR:
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ASSERT(CurrentScreen < ScreenCount-1);
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CurrentScreen++;
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break;
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}
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} while(!Done);
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//
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// Clean up.
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//
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if(!FileText) {
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SpMemFree(HelpText);
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}
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s0:
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CLEAR_ENTIRE_SCREEN();
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SpDisplayHeaderText(
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SpGetHeaderTextId(),
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DEFAULT_ATTRIBUTE
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);
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}
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