1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <svtools/scriptedtext.hxx>
#include <vector>
#include <rtl/ustring.hxx>
#include <vcl/outdev.hxx>
#include <vcl/font.hxx>
#include <tools/debug.hxx>
#include <tools/gen.hxx>
#include <com/sun/star/i18n/ScriptType.hpp>
#include <com/sun/star/i18n/XBreakIterator.hpp>
using namespace ::std;
using namespace ::com::sun::star;
class SvtScriptedTextHelper_Impl
{
private:
OutputDevice& mrOutDevice; /// The output device for drawing the text.
vcl::Font maLatinFont; /// The font for latin text portions.
vcl::Font maAsianFont; /// The font for asian text portions.
vcl::Font maCmplxFont; /// The font for complex text portions.
vcl::Font maDefltFont; /// The default font of the output device.
OUString maText; /// The text.
vector< sal_Int32 > maPosVec; /// The start position of each text portion.
vector< sal_Int16 > maScriptVec; /// The script type of each text portion.
vector< sal_Int32 > maWidthVec; /// The output width of each text portion.
Size maTextSize; /// The size the text will take in the current output device.
/** Gets the font of the given script type. */
const vcl::Font& GetFont( sal_uInt16 _nScript ) const;
/** Sets a font on the output device depending on the script type. */
void SetOutDevFont( sal_uInt16 _nScript )
{ mrOutDevice.SetFont( GetFont( _nScript ) ); }
/** Fills maPosVec with positions of all changes of script type.
This method expects correctly initialized maPosVec and maScriptVec. */
void CalculateSizes();
/** Fills maPosVec with positions of all changes of script type and
maScriptVec with the script type of each portion. */
void CalculateBreaks(
const uno::Reference< i18n::XBreakIterator >& _xBreakIter );
public:
/** This constructor sets an output device and fonts for all script types. */
explicit SvtScriptedTextHelper_Impl(
OutputDevice& _rOutDevice );
/** Sets new fonts and recalculates the text width. */
void SetFonts( vcl::Font const * _pLatinFont, vcl::Font const * _pAsianFont, vcl::Font const * _pCmplxFont );
/** Sets a new text and calculates all script breaks and the text width. */
void SetText(
const OUString& _rText,
const uno::Reference< i18n::XBreakIterator >& _xBreakIter );
/** Returns a size struct containing the width and height of the text in the current output device. */
const Size& GetTextSize() const { return maTextSize;}
/** Draws the text in the current output device. */
void DrawText( const Point& _rPos );
};
SvtScriptedTextHelper_Impl::SvtScriptedTextHelper_Impl(
OutputDevice& _rOutDevice ) :
mrOutDevice( _rOutDevice ),
maLatinFont( _rOutDevice.GetFont() ),
maAsianFont( _rOutDevice.GetFont() ),
maCmplxFont( _rOutDevice.GetFont() ),
maDefltFont( _rOutDevice.GetFont() )
{
}
const vcl::Font& SvtScriptedTextHelper_Impl::GetFont( sal_uInt16 _nScript ) const
{
switch( _nScript )
{
case i18n::ScriptType::LATIN: return maLatinFont;
case i18n::ScriptType::ASIAN: return maAsianFont;
case i18n::ScriptType::COMPLEX: return maCmplxFont;
}
return maDefltFont;
}
void SvtScriptedTextHelper_Impl::CalculateSizes()
{
maTextSize.setWidth(0);
maTextSize.setHeight(0);
mrOutDevice.Push(vcl::PushFlags::FONT | vcl::PushFlags::TEXTCOLOR);
// calculate text portion widths and total width
maWidthVec.clear();
if( !maPosVec.empty() )
{
DBG_ASSERT( maPosVec.size() - 1 == maScriptVec.size(),
"SvtScriptedTextHelper_Impl::CalculateWidth - invalid vectors" );
sal_Int32 nThisPos = maPosVec[ 0 ];
sal_Int32 nNextPos;
sal_Int32 nPosVecSize = maPosVec.size();
sal_Int32 nPosVecIndex = 1;
sal_Int16 nScript;
sal_Int32 nScriptVecIndex = 0;
sal_Int32 nCurrWidth;
while( nPosVecIndex < nPosVecSize )
{
nNextPos = maPosVec[ nPosVecIndex++ ];
nScript = maScriptVec[ nScriptVecIndex++ ];
SetOutDevFont( nScript );
nCurrWidth = mrOutDevice.GetTextWidth( maText, nThisPos, nNextPos - nThisPos );
maWidthVec.push_back( nCurrWidth );
maTextSize.AdjustWidth(nCurrWidth );
nThisPos = nNextPos;
}
}
// calculate maximum font height
SetOutDevFont( i18n::ScriptType::LATIN );
maTextSize.setHeight( std::max( maTextSize.Height(), mrOutDevice.GetTextHeight() ) );
SetOutDevFont( i18n::ScriptType::ASIAN );
maTextSize.setHeight( std::max( maTextSize.Height(), mrOutDevice.GetTextHeight() ) );
SetOutDevFont( i18n::ScriptType::COMPLEX );
maTextSize.setHeight( std::max( maTextSize.Height(), mrOutDevice.GetTextHeight() ) );
mrOutDevice.Pop();
}
void SvtScriptedTextHelper_Impl::CalculateBreaks( const uno::Reference< i18n::XBreakIterator >& _xBreakIter )
{
maPosVec.clear();
maScriptVec.clear();
DBG_ASSERT( _xBreakIter.is(), "SvtScriptedTextHelper_Impl::CalculateBreaks - no break iterator" );
sal_Int32 nLen = maText.getLength();
if( nLen )
{
if( _xBreakIter.is() )
{
sal_Int32 nThisPos = 0; // first position of this portion
sal_Int32 nNextPos = 0; // first position of next portion
sal_Int16 nPortScript; // script type of this portion
do
{
nPortScript = _xBreakIter->getScriptType( maText, nThisPos );
nNextPos = _xBreakIter->endOfScript( maText, nThisPos, nPortScript );
switch( nPortScript )
{
case i18n::ScriptType::LATIN:
case i18n::ScriptType::ASIAN:
case i18n::ScriptType::COMPLEX:
maPosVec.push_back( nThisPos );
maScriptVec.push_back( nPortScript );
break;
default:
{
/* *** handling of weak characters ***
- first portion is weak: Use OutputDevice::HasGlyphs() to find the correct font
- weak portion follows another portion: Script type of preceding portion is used */
if( maPosVec.empty() )
{
sal_Int32 nCharIx = 0;
sal_Int32 nNextCharIx = 0;
sal_Int16 nScript;
do
{
nScript = i18n::ScriptType::LATIN;
while( (nScript != i18n::ScriptType::WEAK) && (nCharIx == nNextCharIx) )
{
nNextCharIx = mrOutDevice.HasGlyphs( GetFont( nScript ), maText, nCharIx, nNextPos - nCharIx );
if( nCharIx == nNextCharIx )
++nScript;
}
if( nNextCharIx == nCharIx )
++nNextCharIx;
maPosVec.push_back( nCharIx );
maScriptVec.push_back( nScript );
nCharIx = nNextCharIx;
}
while( nCharIx < nNextPos && nCharIx != -1 );
}
// nothing to do for following portions
}
}
nThisPos = nNextPos;
}
while( (0 <= nThisPos) && (nThisPos < nLen) );
}
else // no break iterator: whole text LATIN
{
maPosVec.push_back( 0 );
maScriptVec.push_back( i18n::ScriptType::LATIN );
}
// push end position of last portion
if( !maPosVec.empty() )
maPosVec.push_back( nLen );
}
CalculateSizes();
}
void SvtScriptedTextHelper_Impl::SetFonts( vcl::Font const * _pLatinFont, vcl::Font const * _pAsianFont, vcl::Font const * _pCmplxFont )
{
maLatinFont = _pLatinFont ? *_pLatinFont : maDefltFont;
maAsianFont = _pAsianFont ? *_pAsianFont : maDefltFont;
maCmplxFont = _pCmplxFont ? *_pCmplxFont : maDefltFont;
CalculateSizes();
}
void SvtScriptedTextHelper_Impl::SetText( const OUString& _rText, const uno::Reference< i18n::XBreakIterator >& _xBreakIter )
{
maText = _rText;
CalculateBreaks( _xBreakIter );
}
void SvtScriptedTextHelper_Impl::DrawText( const Point& _rPos )
{
if( maText.isEmpty() || maPosVec.empty() )
return;
DBG_ASSERT( maPosVec.size() - 1 == maScriptVec.size(), "SvtScriptedTextHelper_Impl::DrawText - invalid vectors" );
DBG_ASSERT( maScriptVec.size() == maWidthVec.size(), "SvtScriptedTextHelper_Impl::DrawText - invalid vectors" );
mrOutDevice.Push(vcl::PushFlags::FONT | vcl::PushFlags::TEXTCOLOR);
Point aCurrPos( _rPos );
sal_Int32 nThisPos = maPosVec[ 0 ];
sal_Int32 nNextPos;
sal_Int32 nPosVecSize = maPosVec.size();
sal_Int32 nPosVecIndex = 1;
sal_Int16 nScript;
sal_Int32 nVecIndex = 0;
while( nPosVecIndex < nPosVecSize )
{
nNextPos = maPosVec[ nPosVecIndex++ ];
nScript = maScriptVec[ nVecIndex ];
vcl::Font aFont = GetFont( nScript );
mrOutDevice.SetFont( aFont );
if (aFont.GetColor() == COL_AUTO)
mrOutDevice.SetTextColor( mrOutDevice.GetFillColor().IsDark() ? COL_WHITE : COL_BLACK);
mrOutDevice.DrawText( aCurrPos, maText, nThisPos, nNextPos - nThisPos );
aCurrPos.AdjustX(maWidthVec[ nVecIndex++ ] );
aCurrPos.AdjustX(mrOutDevice.GetTextHeight() / 5 ); // add 20% of font height as portion spacing
nThisPos = nNextPos;
}
mrOutDevice.Pop();
}
SvtScriptedTextHelper::SvtScriptedTextHelper( OutputDevice& _rOutDevice ) :
mpImpl( new SvtScriptedTextHelper_Impl( _rOutDevice ) )
{
}
SvtScriptedTextHelper::SvtScriptedTextHelper( const SvtScriptedTextHelper& _rCopy ) :
mpImpl( new SvtScriptedTextHelper_Impl( *_rCopy.mpImpl ) )
{
}
SvtScriptedTextHelper::~SvtScriptedTextHelper()
{
}
void SvtScriptedTextHelper::SetFonts( vcl::Font const * _pLatinFont, vcl::Font const * _pAsianFont, vcl::Font const * _pCmplxFont )
{
mpImpl->SetFonts( _pLatinFont, _pAsianFont, _pCmplxFont );
}
void SvtScriptedTextHelper::SetDefaultFont()
{
mpImpl->SetFonts( nullptr, nullptr, nullptr );
}
void SvtScriptedTextHelper::SetText( const OUString& _rText, const uno::Reference< i18n::XBreakIterator >& _xBreakIter )
{
mpImpl->SetText( _rText, _xBreakIter );
}
const Size& SvtScriptedTextHelper::GetTextSize() const
{
return mpImpl->GetTextSize();
}
void SvtScriptedTextHelper::DrawText( const Point& _rPos )
{
mpImpl->DrawText( _rPos );
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
