1 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
2 : * ***** BEGIN LICENSE BLOCK *****
3 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
4 : *
5 : * The contents of this file are subject to the Mozilla Public License Version
6 : * 1.1 (the "License"); you may not use this file except in compliance with
7 : * the License. You may obtain a copy of the License at
8 : * http://www.mozilla.org/MPL/
9 : *
10 : * Software distributed under the License is distributed on an "AS IS" basis,
11 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12 : * for the specific language governing rights and limitations under the
13 : * License.
14 : *
15 : * The Original Code is Novell code.
16 : *
17 : * The Initial Developer of the Original Code is Novell Corporation.
18 : * Portions created by the Initial Developer are Copyright (C) 2006
19 : * the Initial Developer. All Rights Reserved.
20 : *
21 : * Contributor(s):
22 : * robert@ocallahan.org
23 : *
24 : * Alternatively, the contents of this file may be used under the terms of
25 : * either the GNU General Public License Version 2 or later (the "GPL"), or
26 : * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
27 : * in which case the provisions of the GPL or the LGPL are applicable instead
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29 : * under the terms of either the GPL or the LGPL, and not to allow others to
30 : * use your version of this file under the terms of the MPL, indicate your
31 : * decision by deleting the provisions above and replace them with the notice
32 : * and other provisions required by the GPL or the LGPL. If you do not delete
33 : * the provisions above, a recipient may use your version of this file under
34 : * the terms of any one of the MPL, the GPL or the LGPL.
35 : *
36 : * ***** END LICENSE BLOCK ***** */
37 :
38 : #ifndef NSTEXTRUNTRANSFORMATIONS_H_
39 : #define NSTEXTRUNTRANSFORMATIONS_H_
40 :
41 : #include "gfxFont.h"
42 :
43 : class nsTransformedTextRun;
44 : class nsStyleContext;
45 :
46 0 : class nsTransformingTextRunFactory {
47 : public:
48 0 : virtual ~nsTransformingTextRunFactory() {}
49 :
50 : // Default 8-bit path just transforms to Unicode and takes that path
51 : nsTransformedTextRun* MakeTextRun(const PRUint8* aString, PRUint32 aLength,
52 : const gfxFontGroup::Parameters* aParams,
53 : gfxFontGroup* aFontGroup, PRUint32 aFlags,
54 : nsStyleContext** aStyles, bool aOwnsFactory = true);
55 : nsTransformedTextRun* MakeTextRun(const PRUnichar* aString, PRUint32 aLength,
56 : const gfxFontGroup::Parameters* aParams,
57 : gfxFontGroup* aFontGroup, PRUint32 aFlags,
58 : nsStyleContext** aStyles, bool aOwnsFactory = true);
59 :
60 : virtual void RebuildTextRun(nsTransformedTextRun* aTextRun, gfxContext* aRefContext) = 0;
61 : };
62 :
63 : /**
64 : * Builds textruns that render their text using a font-variant (i.e.,
65 : * smallcaps).
66 : */
67 0 : class nsFontVariantTextRunFactory : public nsTransformingTextRunFactory {
68 : public:
69 : virtual void RebuildTextRun(nsTransformedTextRun* aTextRun, gfxContext* aRefContext);
70 : };
71 :
72 : /**
73 : * Builds textruns that transform the text in some way (e.g., capitalize)
74 : * and then render the text using some other textrun implementation.
75 : */
76 0 : class nsCaseTransformTextRunFactory : public nsTransformingTextRunFactory {
77 : public:
78 : // We could add an optimization here so that when there is no inner
79 : // factory, no title-case conversion, and no upper-casing of SZLIG, we override
80 : // MakeTextRun (after making it virtual in the superclass) and have it
81 : // just convert the string to uppercase or lowercase and create the textrun
82 : // via the fontgroup.
83 :
84 : // Takes ownership of aInnerTransformTextRunFactory
85 0 : nsCaseTransformTextRunFactory(nsTransformingTextRunFactory* aInnerTransformingTextRunFactory,
86 : bool aAllUppercase = false)
87 : : mInnerTransformingTextRunFactory(aInnerTransformingTextRunFactory),
88 0 : mAllUppercase(aAllUppercase) {}
89 :
90 : virtual void RebuildTextRun(nsTransformedTextRun* aTextRun, gfxContext* aRefContext);
91 :
92 : protected:
93 : nsAutoPtr<nsTransformingTextRunFactory> mInnerTransformingTextRunFactory;
94 : bool mAllUppercase;
95 : };
96 :
97 : /**
98 : * So that we can reshape as necessary, we store enough information
99 : * to fully rebuild the textrun contents.
100 : */
101 : class nsTransformedTextRun : public gfxTextRun {
102 : public:
103 : static nsTransformedTextRun *Create(const gfxTextRunFactory::Parameters* aParams,
104 : nsTransformingTextRunFactory* aFactory,
105 : gfxFontGroup* aFontGroup,
106 : const PRUnichar* aString, PRUint32 aLength,
107 : const PRUint32 aFlags, nsStyleContext** aStyles,
108 : bool aOwnsFactory);
109 :
110 0 : ~nsTransformedTextRun() {
111 0 : if (mOwnsFactory) {
112 0 : delete mFactory;
113 : }
114 0 : }
115 :
116 : void SetCapitalization(PRUint32 aStart, PRUint32 aLength,
117 : bool* aCapitalization,
118 : gfxContext* aRefContext);
119 : virtual bool SetPotentialLineBreaks(PRUint32 aStart, PRUint32 aLength,
120 : PRUint8* aBreakBefore,
121 : gfxContext* aRefContext);
122 : /**
123 : * Called after SetCapitalization and SetPotentialLineBreaks
124 : * are done and before we request any data from the textrun. Also always
125 : * called after a Create.
126 : */
127 0 : void FinishSettingProperties(gfxContext* aRefContext)
128 : {
129 0 : if (mNeedsRebuild) {
130 0 : mNeedsRebuild = false;
131 0 : mFactory->RebuildTextRun(this, aRefContext);
132 : }
133 0 : }
134 :
135 : // override the gfxTextRun impls to account for additional members here
136 : virtual NS_MUST_OVERRIDE size_t SizeOfExcludingThis(nsMallocSizeOfFun aMallocSizeOf);
137 : virtual NS_MUST_OVERRIDE size_t SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf);
138 :
139 : nsTransformingTextRunFactory *mFactory;
140 : nsTArray<nsRefPtr<nsStyleContext> > mStyles;
141 : nsTArray<bool> mCapitalize;
142 : nsString mString;
143 : bool mOwnsFactory;
144 : bool mNeedsRebuild;
145 :
146 : private:
147 0 : nsTransformedTextRun(const gfxTextRunFactory::Parameters* aParams,
148 : nsTransformingTextRunFactory* aFactory,
149 : gfxFontGroup* aFontGroup,
150 : const PRUnichar* aString, PRUint32 aLength,
151 : const PRUint32 aFlags, nsStyleContext** aStyles,
152 : bool aOwnsFactory)
153 : : gfxTextRun(aParams, aString, aLength, aFontGroup, aFlags),
154 : mFactory(aFactory), mString(aString, aLength),
155 0 : mOwnsFactory(aOwnsFactory), mNeedsRebuild(true)
156 : {
157 0 : mCharacterGlyphs = reinterpret_cast<CompressedGlyph*>(this + 1);
158 :
159 : PRUint32 i;
160 0 : for (i = 0; i < aLength; ++i) {
161 0 : mStyles.AppendElement(aStyles[i]);
162 : }
163 0 : }
164 : };
165 :
166 : #endif /*NSTEXTRUNTRANSFORMATIONS_H_*/
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