/*

    File: DrawUnicodeString.c

    Description:

        Routines for drawing unicode strings using ATSUI.  

    Copyright:

        Copyright (c) 2003 Apple Computer, Inc. All rights reserved.

    Disclaimer:

        IMPORTANT:  This Apple software is supplied to you by Apple Computer, Inc.

        ("Apple") in consideration of your agreement to the following terms, and your

        use, installation, modification or redistribution of this Apple software

        constitutes acceptance of these terms.  If you do not agree with these terms,

        please do not use, install, modify or redistribute this Apple software.

        In consideration of your agreement to abide by the following terms, and subject

        to these terms, Apple grants you a personal, non-exclusive license, under AppleÕs

        copyrights in this original Apple software (the "Apple Software"), to use,

        reproduce, modify and redistribute the Apple Software, with or without

        modifications, in source and/or binary forms; provided that if you redistribute

        the Apple Software in its entirety and without modifications, you must retain

        this notice and the following text and disclaimers in all such redistributions of

        the Apple Software.  Neither the name, trademarks, service marks or logos of

        Apple Computer, Inc. may be used to endorse or promote products derived from the

        Apple Software without specific prior written permission from Apple.  Except as

        expressly stated in this notice, no other rights or licenses, express or implied,

        are granted by Apple herein, including but not limited to any patent rights that

        may be infringed by your derivative works or by other works in which the Apple

        Software may be incorporated.

        The Apple Software is provided by Apple on an "AS IS" basis.  APPLE MAKES NO

        WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED

        WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR

        PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN

        COMBINATION WITH YOUR PRODUCTS.

        IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR

        CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE

        GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

        ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION

        OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT

        (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN

        ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    Change History (most recent first):

        Wed, Feb 16, 2001 -- created

        Wed, Apr 02, 2001 -- added unicode only routines

        Wed, Aug 27, 2003 -- morphed to work in TextNameTool sample

*/

#include "DrawUnicodeString.h"

static int FIDRECCMP(const void *a, const void *b) {

    FontNameIDRec *fida, *fidb;

    fida = (FontNameIDRec *) a;

    fidb = (FontNameIDRec *) b;

    return strcmp(fida->name, fidb->name);

}

OSStatus GetInstalledFontList(

            FontNameIDVector *fontList, /* place to return pointer to list */

            long *listLength) {         /* place to return length of list */

    OSStatus err;

    ItemCount i, numFonts;

    ATSUFontID *fontIDList = NULL;

    FontNameIDVector fiv;

    long fivlen;

        /* set up */

    fivlen = 0;

    fiv = NULL;

        /* iterate over installed fonts */

    err = ATSUFontCount( &numFonts );

    if ( err == noErr ) {

        fontIDList = (ATSUFontID*) malloc( numFonts * sizeof(ATSUFontID) );

        if (fontIDList == NULL) {

            err = memFullErr;

        } else {

            fiv = (FontNameIDVector) malloc( numFonts * sizeof(FontNameIDRec) );

            if (fiv == NULL) {

                err = memFullErr;

            } else {

                err = ATSUGetFontIDs( fontIDList, numFonts, NULL );

                if (err == noErr) {

                    for ( i = 0; i < numFonts; i++ ) {

                        ByteCount namelen;

                        ItemCount oNameIndex;

                        char namestring[512];

                            /* best effort here.  If the name lookup or the name tests

                            fail, then we simply don't include the item in the list */ 

                        err = ATSUFindFontName( fontIDList[ i ], kFontFullName,

                                kFontMacintoshPlatform, kFontRomanScript, kFontEnglishLanguage,

                                sizeof(namestring), namestring, &namelen, &oNameIndex );

                        if (err == noErr) {

                            namestring[namelen] = 0;

                            if ( namelen > 0 && namestring[0] != '.' && namestring[0] != '%' && namestring[0] != '#' ) {

                                char* p;

                                p = (char*) malloc(strlen(namestring) + 1);

                                if (p == NULL) {

                                    err = memFullErr;

                                    break;

                                } else {

                                    strcpy(p, namestring);

                                    fiv[fivlen].theFontID = fontIDList[ i ];

                                    fiv[fivlen++].name = p;

                                }

                            }

                        }

                    }

                }

            }

            free(fontIDList);

        }

    }

        /* sort the resulting list */

    if (err == noErr) {

        if (fivlen > 0) {

            qsort(fiv, fivlen, sizeof(FontNameIDRec), FIDRECCMP);

        }

        *fontList = fiv;

        *listLength = fivlen;

    } else {

        if (fiv != NULL) {

            for (i=0; i<fivlen; i++)

                free(fiv[i].name);

            free(fiv);

        }

    }

    return err;

}

OSStatus GetNamedFontID(char* fontName, ATSUFontID *theFontID) {

    return ATSUFindFontFromName(

                fontName,

                strlen(fontName),

                kFontFullName,

                kFontMacintoshPlatform,

                kFontRomanScript,

                kFontEnglishLanguage, theFontID);

}

    /* MakeSimpleATSUIStyle creates a simple ATSUI style record that

    can be used in calls to the RenderCFString routine. */ 

OSStatus MakeSimpleATSUIStyle(ATSUFontID theFontID, short fontSize, short qdStyle, RGBColor *fontColor, ATSUStyle *theStyle) {

    ATSUFontID atsuFont;

    OSStatus err;

        /* Three parrallel arrays for setting up attributes. */

#define kTagMax 32

    ItemCount tagCount;

    ATSUAttributeTag theTags[kTagMax];

    ByteCount theSizes[kTagMax];

    ATSUAttributeValuePtr theValues[kTagMax];   

    Fixed atsuSize;

    short atsuOrientation;

    RGBColor defaultColor = { 0, 0, 0};

    Boolean trueVar = true, falseVar = false;

    ATSUStyle localStyle;

        /* initial tag count */

    tagCount = 0;

        /* the font */

    atsuFont = theFontID;

    theTags[tagCount] = kATSUFontTag;

    theSizes[tagCount] = sizeof(ATSUFontID);

    theValues[tagCount++] = &atsuFont;

        /* the size */

    atsuSize = FixRatio(fontSize, 1);

    theTags[tagCount] = kATSUSizeTag;

    theSizes[tagCount] = sizeof(Fixed);

    theValues[tagCount++] = &atsuSize;

        /* the orientation */

    atsuOrientation = kATSUStronglyHorizontal;

    theTags[tagCount] = kATSUVerticalCharacterTag;

    theSizes[tagCount] = sizeof(UInt16);

    theValues[tagCount++] = &atsuOrientation;

        /* font color */

    theTags[tagCount] = kATSUColorTag;

    theSizes[tagCount] = sizeof(RGBColor);

    theValues[tagCount++] = ((fontColor != NULL) ? fontColor : &defaultColor);

        /* bold */

    theTags[tagCount] = kATSUQDBoldfaceTag;

    theSizes[tagCount] = sizeof(Boolean);

    theValues[tagCount++] = ((qdStyle & bold) != 0 ? &trueVar : &falseVar);

        /* italic */

    theTags[tagCount] = kATSUQDItalicTag;

    theSizes[tagCount] = sizeof(Boolean);

    theValues[tagCount++] = ((qdStyle & italic) != 0 ? &trueVar : &falseVar);

        /* underline */

    theTags[tagCount] = kATSUQDUnderlineTag;

    theSizes[tagCount] = sizeof(Boolean);

    theValues[tagCount++] = ((qdStyle & underline) != 0 ? &trueVar : &falseVar);

        /* condensed */

    theTags[tagCount] = kATSUQDCondensedTag;

    theSizes[tagCount] = sizeof(Boolean);

    theValues[tagCount++] = ((qdStyle & condense) != 0 ? &trueVar : &falseVar);

        /* extended */

    theTags[tagCount] = kATSUQDExtendedTag;

    theSizes[tagCount] = sizeof(Boolean);

    theValues[tagCount++] = ((qdStyle & extend) != 0 ? &trueVar : &falseVar);

    err = ATSUCreateStyle(&localStyle);

    if (err == noErr) {

        err = ATSUSetAttributes( localStyle, tagCount, theTags, theSizes, theValues );

        if (err == noErr) {

            *theStyle = localStyle;

        } else {

            ATSUDisposeStyle(localStyle);

        }

    }

        /* done, return */  

    return err;

}

    /* MeasureUnicodeString returns a rectangle where the CFStringRef would

    be drawn if it were drawn at location (0,0) -- just like QDTextBounds. */

OSStatus MeasureUnicodeString(ConstUniCharArrayPtr iText, UniCharCount iTextLength,

        ATSUStyle theStyle, Rect *textbounds, Rect *imagebounds) {

    OSStatus err;

        /* set up our locals, verify parameters... */

    if (iText == NULL || theStyle == NULL) {

        err = paramErr;

    } else {

        ATSUTextLayout theLayout;

            /* create the ATSUI layout */

        err = ATSUCreateTextLayoutWithTextPtr( iText, 0,

            iTextLength, iTextLength, 1, 

            (unsigned long *) &iTextLength, &theStyle, &theLayout);

        if (err == noErr) {

            ATSLineLayoutOptions layoutOptions;

            ATSUAttributeTag theTags[1];

            ByteCount theSizes[1];

            ATSUAttributeValuePtr theValues[1];

                /* ask atsui to ignore the default leading value for the font */

            layoutOptions = kATSLineIgnoreFontLeading;

            theTags[0] = kATSULineLayoutOptionsTag;

            theSizes[0] = sizeof(ATSLineLayoutOptions);

            theValues[0] = &layoutOptions;

            err = ATSUSetLayoutControls (theLayout, 1, theTags, theSizes, theValues);

            if (err == noErr) {

                ATSUTextMeasurement oTextBefore, oTextAfter, oAscent, oDescent;

                    /* measure the text */

                err = ATSUMeasureText( theLayout, 0, iTextLength,

                    &oTextBefore, &oTextAfter, &oAscent, &oDescent);

                if (err == noErr) {

                    SetRect(textbounds, - FixRound(oTextBefore), - FixRound(oAscent), FixRound(oTextAfter), FixRound(oDescent)+1);

                    err = ATSUMeasureTextImage(theLayout, 0, iTextLength, 0, 0, imagebounds);

                }

            }

            ATSUDisposeTextLayout(theLayout);

        }

    }

        /* done */

    return err;

}

    /* RenderCFString renders a CFString at (h, v) in the current grafport

    using ATSUI using the style specified in the atsui style record. */

OSStatus RenderUnicodeString(

            ConstUniCharArrayPtr iText, /* text to draw */

            UniCharCount iTextLength,   /* number of characters */

            ATSUStyle theStyle,         /* the style */

            short h,                    /* horizontal position to draw at */

            short v,                    /* vertical position to draw at */

            CGContextRef theContext) {  /* cg context, can be NULL */

    OSStatus err;

        /* set up our locals, verify parameters... */

    if (iText == NULL || theStyle == NULL) {

        err = paramErr;

    } else {

        ATSUTextLayout theLayout;

            /* create the ATSUI layout */

        err = ATSUCreateTextLayoutWithTextPtr( iText, 0,

            iTextLength, iTextLength, 1, 

            (unsigned long *) &iTextLength, &theStyle, &theLayout);

        if (err == noErr) {

            ATSLineLayoutOptions layoutOptions;

            ATSUAttributeTag theTags[10];

            ByteCount theSizes[10];

            ATSUAttributeValuePtr theValues[10];

            ItemCount numcontrols = 0;

                /* ask atsui to ignore the default leading value for the font */

            layoutOptions = kATSLineIgnoreFontLeading;

            theTags[numcontrols] = kATSULineLayoutOptionsTag;

            theSizes[numcontrols] = sizeof(ATSLineLayoutOptions);

            theValues[numcontrols++] = &layoutOptions;

            if (theContext != NULL) {

                theTags[numcontrols] = kATSUCGContextTag;

                theSizes[numcontrols] = sizeof(theContext);

                theValues[numcontrols++] = &theContext;

            }

            err = ATSUSetLayoutControls (theLayout, numcontrols, theTags, theSizes, theValues);

            if (err == noErr) {

                    /* draw the text */

                err = ATSUDrawText(theLayout, 0, iTextLength, FixRatio(h, 1), FixRatio(v, 1));

            }

            ATSUDisposeTextLayout(theLayout);

        }

    }

        /* done */

    return err;

}