Mac-Source 1994 July/Mac-Source_July_1994.iso/C and C++/System/Infinity Windoid 2.5.1/WindoidUtil.c

Text File | 1994-01-16 | 14.5 KB | 487 lines | [TEXT/MPS ]

//******************************************************************************
//
//    FILE:
//        WindoidUtil.c
//
//    WRITTEN BY:
//        Troy Gaul
//        Infinity Systems
//
//        © 1991-94 Infinity Systems
//        All rights reserved.
//
//    DESCRIPTION:
//        This file contains utility routines that the Infinity Windoid
//        WDEF uses in order to get its job done.
//
//    HOW TO CONTACT THE AUTHOR:
//        Send e-mail to: [e-mail]
//
//******************************************************************************

//******************************************************************************
//    Headers
//------------------------------------------------------------------------------

#include "WindoidDefines.h"            // must be included before Apple interfaces

#include <Types.h>
#include <Memory.h>
#include <QuickDraw.h>
#include <OSUtils.h>
#include <Windows.h>
#include <Palettes.h>
#include <ToolUtils.h>
#include <GestaltEqu.h>

#include "WindoidTypes.h"
#include "WindoidUtil.h"

//******************************************************************************
//    Environment-determining Routines
//------------------------------------------------------------------------------
    //    These use SysEnvirons by default so we don't have to rely on Gestalt
    //    being available and so MPW won't include that code in our resource.
    //    This can be changed by defining USE_GESTALT

Boolean
HasSystem7(void) {
#ifndef USE_GESTALT
    SysEnvRec theWorld;

    return (SysEnvirons(1, &theWorld) == noErr
            && theWorld.systemVersion >= 0x0700);
#else
    long vers = 0;

    return (Gestalt(gestaltSystemVersion, &vers) == noErr
            && ((vers & 0xFFFF) >= 0x0700));
#endif
}

//------------------------------------------------------------------------------

Boolean
HasCQDraw(void) {
#ifndef USE_GESTALT
    SysEnvRec theWorld;

    return ((SysEnvirons(1, &theWorld) == noErr) &&
            theWorld.hasColorQD);
#else
     long vers = 0;

    return (Gestalt(gestaltQuickdrawVersion, &vers) == noErr
            && (vers & 0xFF00));
#endif
}

//******************************************************************************
//    SyncPorts
//------------------------------------------------------------------------------
    //    Straight from the pages of _Macintosh Programming Secrets_, Second
    //    Edition by Scott Knaster and Keith Rollin (page 425). (except that this
    //    version doesn't check Gestalt, it will only be called if CQD is running)
    //    This routines was added to 2.3. It makes sure the drawing environment
    //    is set correctly if the system has color. This is not needed for the
    //    code in this WDEF as it is, but if a DoWDrawGIcon handler is implemented,
    //    this is needed to make sure the drawing environment is set as Apple
    //    tells us it will be for drawing the gray, xor'ed border.

void
SyncPorts(void) {
    GrafPtr bwPort;
    CGrafPtr colorPort;

    GetWMgrPort(&bwPort);
    GetCWMgrPort(&colorPort);
    SetPort((GrafPtr) colorPort);

    BlockMove(&bwPort->pnLoc, &colorPort->pnLoc, 10);
    BlockMove(&bwPort->pnVis, &colorPort->pnVis, 14);
    PenPat((ConstPatternParam) &bwPort->pnPat);
    BackPat((ConstPatternParam) &bwPort->bkPat);
}

//******************************************************************************
//    OurDeviceLoop
//------------------------------------------------------------------------------
#ifndef SYS7_OR_LATER

void
OurDeviceLoop(RgnHandle drawingRgn, DeviceLoopDrawingProcPtr drawingProc,
              long userData, DeviceLoopFlags flags) {

    if (HasSystem7()) {
        DeviceLoop(drawingRgn, drawingProc, userData, flags);
            // this works with or without Color Quickdraw
    } else if (HasCQDraw()) {
        short depth;
        Rect deviceRect;
        GDHandle theDevice;
        RgnHandle saveClip = NewRgn();
        RgnHandle deviceRgn = NewRgn();
        RgnHandle intersectingRgn = NewRgn();

        GetClip(saveClip);

        //    Get the handle to the first device in the list.
        theDevice = GetDeviceList();

        //    Loop through all the devices in the list.
        while (theDevice) {
            // Get the device's gdRect and convert it to local coordinates.
            deviceRect = (**theDevice).gdRect;
            depth = (**(**theDevice).gdPMap).pixelSize;

            GlobalToLocal((Point*)&deviceRect.top);
            GlobalToLocal((Point*)&deviceRect.bottom);

            //    Check if the app's window rect intersects the device's, and if it
            //    does, set the clip region's rect to the intersection, then DRAW!
            RectRgn(deviceRgn, &deviceRect);
            SectRgn(drawingRgn, deviceRgn, intersectingRgn);
            SectRgn(intersectingRgn, saveClip, intersectingRgn);

            if (!EmptyRgn(intersectingRgn)) {
                SetClip(intersectingRgn);
                (*drawingProc)(depth, (**theDevice).gdFlags, theDevice, userData);
            }

            //    Get the next device in the list.
            theDevice = GetNextDevice(theDevice);
        }

        SetClip(saveClip);
        DisposeRgn(saveClip);
        DisposeRgn(deviceRgn);
        DisposeRgn(intersectingRgn);
    } else {
        //    68000 machine, original QuickDraw, punt
        (*drawingProc)(1, 0, nil, userData);
    }
}

#endif
//******************************************************************************
//    Color Mixing Routines
//------------------------------------------------------------------------------

//    This routine will return some defaults in case neither the window's color
//    table nor the System's is long enough to contain the color requested
//    It was provided by Jim Petrick as part of a fix for a bug in version 2.3
//    of the Infinity Windoid. This problem would be seen if a custom WCTB was
//    being used which was not as long as the default System one (or if the
//    System one had been changed to a shorter size). The rest of Jim's fix
//    can be found in GetWctbColor.

static void
UseDefaultColor(short index, RGBColor *theColor) {
    switch (index) {
        case wContentColor:            //     0
        case wTitleBarColor:        //     4
        case wHiliteColorLight:        //     5
        case wTitleBarLight:        //     7
            theColor->red = theColor->green = theColor->blue = 0xFFFF;
            break;

        case wDialogLight:            //     9
        case wTingeLight:            //    11
            theColor->red = theColor->green = 0xCCCC;
            theColor->blue = 0xFFFF;
            break;

        case wTingeDark:            //    12
            theColor->red = theColor->green = 0x3333;
            theColor->blue = 0x6666;
            break;

        default:
            theColor->red = theColor->green = theColor->blue = 0;
            break;
    }
}

//------------------------------------------------------------------------------

static void
GetWctbColor(WindowPeek window, short partCode, RGBColor *theColor) {
    //    Given a partCode, return the RGBColor associated with it. (Using the
    //    default window color table.)
    AuxWinHandle awHndl;
    short count;

    //    Get the Color table for the window if it has one.

    (void) GetAuxWin((WindowPtr) window, &awHndl);
    count = (**(WCTabHandle) ((**awHndl).awCTable)).ctSize;


    //    If the table didn't contain the entry of interest, look to the
    //    default table.

    if (count < partCode) {
        GetAuxWin(nil, &awHndl);
        count = (**(WCTabHandle) ((**awHndl).awCTable)).ctSize;
    }


    //    If the entry is there, use it, if not make a best guess at a default value.

    if (count < partCode)
        UseDefaultColor(partCode, theColor);
    else
        *theColor = (**(WCTabHandle) ((**awHndl).awCTable)).ctTable[partCode].rgb;
}

//------------------------------------------------------------------------------

void
WctbForeColor(WindowPeek window, short partCode) {
    RGBColor theColor;

    GetWctbColor(window, partCode, &theColor);
    RGBForeColor(&theColor);
}

//------------------------------------------------------------------------------

void
WctbBackColor(WindowPeek window, short partCode) {
    RGBColor theColor;

    GetWctbColor(window, partCode, &theColor);
    RGBBackColor(&theColor);
}

//------------------------------------------------------------------------------
#pragma processor 68020
    // Note: this is okay because this will only be called if we are
    // doing System 7 color, which requires Color Quickdraw, which is only
    // available on systems with 68020's or better. This is done to reduce
    // code size. If it isn't compiled this way, several routines will be
    // added to the code WDEF resource to handle the long integer arithmetic.

static void
MixColor(const RGBColor *light, const RGBColor *dark,
         short shade, RGBColor *result) {
    shade = 0x0F - shade;
        //    This is necessary because we give shades between light and
        //    dark (0% is light), but for colors, $0000 is black and $FFFF
        //    is dark.

    result->red      = (light->red   - dark->red)   * shade / 15 + dark->red;
    result->green = (light->green - dark->green) * shade / 15 + dark->green;
    result->blue  = (light->blue  - dark->blue)  * shade / 15 + dark->blue;
}

#pragma processor 68000
//------------------------------------------------------------------------------

static void
AvgWctbColor(WindowPeek window, short light, short dark, short shade,
             RGBColor *theColor) {
    // Mix two parts by the given shade, which is actually a value
    // between 0 (0%) and 15 (100%), return the RGBColor.
    RGBColor lightColor;
    RGBColor darkColor;

    GetWctbColor(window, light, &lightColor);
    GetWctbColor(window, dark, &darkColor);
    MixColor(&lightColor, &darkColor, shade, theColor);
}

//------------------------------------------------------------------------------

void
AvgWctbForeColor(WindowPeek window, short light, short dark, short shade) {
    RGBColor theColor;

    AvgWctbColor(window, light, dark, shade, &theColor);
    RGBForeColor(&theColor);
}

//------------------------------------------------------------------------------

void
AvgWctbBackColor(WindowPeek window, short light, short dark, short shade) {
    RGBColor theColor;

    AvgWctbColor(window, light, dark, shade, &theColor);
    RGBBackColor(&theColor);
}

//******************************************************************************
//    CheckDisplay -- Check to see if we are using color title bars
//------------------------------------------------------------------------------

static Boolean
CheckAvailable(WindowPeek window, short light, short dark,
               short count, short *ramp) {
    // Given a light and dark index value, a count, and and an array of
    // 'percentage' values (0x0 to 0xF, or 0 to 15), see if each of the
    // values in the ramp maps to a different color on the screen. If not,
    // we need to use black-and-white.

    RGBColor theColor;
    short i;
    short colorIndex = 0;
    short lastIndex;

    for (i = 0 ; i < count ; i++) {
        AvgWctbColor(window, light, dark, ramp[i], &theColor);

        lastIndex = colorIndex;
        colorIndex = Color2Index(&theColor);

        if (i > 0 && colorIndex == lastIndex)    // return false if two entries
            return false;                        // have the same index value
    }
    return true;
}

//------------------------------------------------------------------------------

short
CheckDisplay(short theDepth, short deviceFlags,
             GDHandle targetDevice, WindowPeek window) {
    Boolean        inColor;
    short        result;
    RGBColor    testColor;
    GDHandle    saveDevice;

    inColor = HasCQDraw() && (deviceFlags & (0x0001 << gdDevType));

    result = blackandwhite;                    // assume Black and White
    if (theDepth >= 4) {
#ifndef SYS7_OR_LATER
        if (!HasSystem7()) {
            result = sys6color;                // System 6.0.x Color
        } else {
#endif
            GetWctbColor(window, wTingeLight, &testColor);
            if (testColor.red != 0 || testColor.green != 0 || testColor.blue != 0)
                // check for B&W control panel setting, otherwise:
                result = sys7color;            // System 7.0 Color
#ifndef SYS7_OR_LATER
        }
#endif
    }
    // Note: Since I didn't find another way to see if the user had changed
    // the settings in the Color control panel to the Black-and-white setting,
    // I actually check to see if the rgb components of the light tinge color
    // are non-zero (which seemed to be the case with that setting).

    if (result == sys7color && inColor && theDepth <= 8) {
        short ramp[5];
            // Make sure this array is allocated big enough for the largest ramp.

        result = blackandwhite;
        saveDevice = GetGDevice();
        SetGDevice(targetDevice);

        ramp[0] = 0x00;
        ramp[1] = 0x07;
        ramp[2] = 0x08;
        ramp[3] = 0x0A;
        ramp[4] = 0x0D;
        if (CheckAvailable(window, wHiliteColorLight, wHiliteColorDark, 5, ramp)) {
            ramp[0] = 0x00;
            ramp[1] = 0x01;
            ramp[2] = 0x04;
            if (CheckAvailable(window, wTitleBarLight, wTitleBarDark, 3, ramp)) {
                ramp[0] = 0x00;
                ramp[1] = 0x04;
                ramp[2] = 0x0F;
                if (CheckAvailable(window, wTingeLight, wTingeDark, 3, ramp))
                    result = sys7color;
            }
        }
        SetGDevice(saveDevice);
    }
    // This part checks to see if there are 'enough' colors to draw the
    // title bar in color under System 7. It is supposed to do so in the
    // same way that Apple's system WDEF does. I essentially took the
    // assembly code that Apple released and tried to make this use the
    // same algorithm.

    return result;
}

//******************************************************************************
//    Color Utility routines
//------------------------------------------------------------------------------

void
ColorsNormal(void) {
    ForeColor(blackColor);
    BackColor(whiteColor);
}

//******************************************************************************
//    General Helper Functions
//------------------------------------------------------------------------------

void
FrameBox(const Rect *theRect) {
    Rect tempRect = *theRect;

    FrameRect(theRect);
    InsetRect(&tempRect, 1, 1);
    EraseRect(&tempRect);
}

//------------------------------------------------------------------------------

void
FrameTopLeftShading(Rect theRect) {
    theRect.right--;        // compensate for the way the rectangle hangs
    theRect.bottom--;

    MoveTo(theRect.left,  theRect.bottom);            //    •••••
    LineTo(theRect.left,  theRect.top   );            //    •
    LineTo(theRect.right, theRect.top   );            //    •
}

//------------------------------------------------------------------------------

void
FrameBottomRightShading(Rect theRect) {
    theRect.right--;        // compensate for the way the rectangle hangs
    theRect.bottom--;

    MoveTo(theRect.left,  theRect.bottom);            //        •
    LineTo(theRect.right, theRect.bottom);            //        •
    LineTo(theRect.right, theRect.top   );            //    •••••
}

//******************************************************************************

void
GetGlobalMappingPoint(WindowPeek window, Point *thePoint) {
    //    This routine returns a point that gives the horizontal and vertical
    //  offsets needed to map something into global coordinates.
    GrafPtr savePort;

    GetPort(&savePort);
    SetPort((GrafPtr) window);

    SetPt(thePoint, 0, 0);
    LocalToGlobal(thePoint);

    SetPort(savePort);
}

//------------------------------------------------------------------------------

void
GetGlobalContentRect(WindowPeek window, Rect *contentRect) {
    Point mappingPoint;

    *contentRect = window->port.portRect;
    GetGlobalMappingPoint(window, &mappingPoint);
    OffsetRect(contentRect, mappingPoint.h, mappingPoint.v);
}

//******************************************************************************