1/*
2 *******************************************************************************
3 *
4 *   © 2016 and later: Unicode, Inc. and others.
5 *   License & terms of use: http://www.unicode.org/copyright.html#License
6 *
7 *******************************************************************************
8 *******************************************************************************
9 *
10 *   Copyright (C) 1999-2003, International Business Machines
11 *   Corporation and others.  All Rights Reserved.
12 *
13 *******************************************************************************
14 *   file name:  ScriptCompositeFontInstance.cpp
15 *
16 *   created on: 02/05/2003
17 *   created by: Eric R. Mader
18 */
19
20#include "layout/LETypes.h"
21
22#include "unicode/uscript.h"
23
24#include "FontMap.h"
25
26#include "ScriptCompositeFontInstance.h"
27
28const char ScriptCompositeFontInstance::fgClassID=0;
29
30ScriptCompositeFontInstance::ScriptCompositeFontInstance(FontMap *fontMap)
31    : fFontMap(fontMap)
32{
33    // nothing else to do
34}
35
36ScriptCompositeFontInstance::~ScriptCompositeFontInstance()
37{
38    delete fFontMap;
39    fFontMap = NULL;
40}
41
42void ScriptCompositeFontInstance::getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const
43{
44    LEErrorCode status = LE_NO_ERROR;
45    le_int32 script = LE_GET_SUB_FONT(glyph);
46    const LEFontInstance *font = fFontMap->getScriptFont(script, status);
47
48    advance.fX = 0;
49    advance.fY = 0;
50
51    if (LE_SUCCESS(status)) {
52        font->getGlyphAdvance(LE_GET_GLYPH(glyph), advance);
53    }
54}
55
56le_bool ScriptCompositeFontInstance::getGlyphPoint(LEGlyphID glyph, le_int32 pointNumber, LEPoint &point) const
57{
58    LEErrorCode status = LE_NO_ERROR;
59    le_int32 script = LE_GET_SUB_FONT(glyph);
60    const LEFontInstance *font = fFontMap->getScriptFont(script, status);
61
62    if (LE_SUCCESS(status)) {
63        return font->getGlyphPoint(LE_GET_GLYPH(glyph), pointNumber, point);
64    }
65
66    return FALSE;
67}
68
69const LEFontInstance *ScriptCompositeFontInstance::getSubFont(const LEUnicode chars[], le_int32 *offset, le_int32 limit, le_int32 script, LEErrorCode &success) const
70{
71    if (LE_FAILURE(success)) {
72        return NULL;
73    }
74
75    if (chars == NULL || *offset < 0 || limit < 0 || *offset >= limit || script < 0 || script >= scriptCodeCount) {
76        success = LE_ILLEGAL_ARGUMENT_ERROR;
77        return NULL;
78    }
79
80    const LEFontInstance *result = fFontMap->getScriptFont(script, success);
81
82    if (LE_FAILURE(success)) {
83        return NULL;
84    }
85
86    *offset = limit;
87    return result;
88}
89
90// This is the really stupid version that doesn't look in any other font for the character...
91// It would be better to also look in the "DEFAULT:" font. Another thing to do would be to
92// look in all the fonts in some order, script code order being the most obvious...
93LEGlyphID ScriptCompositeFontInstance::mapCharToGlyph(LEUnicode32 ch) const
94{
95    UErrorCode  error  = U_ZERO_ERROR;
96    LEErrorCode status = LE_NO_ERROR;
97    le_int32 script = uscript_getScript(ch, &error);
98    const LEFontInstance *scriptFont = fFontMap->getScriptFont(script, status);
99    LEGlyphID subFont = LE_SET_SUB_FONT(0, script);
100
101    if (LE_FAILURE(status)) {
102        return subFont;
103    }
104
105    LEGlyphID glyph = scriptFont->mapCharToGlyph(ch);
106
107    return LE_SET_GLYPH(subFont, glyph);
108}
109
110