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