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
|
/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed 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
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "StaticLayout"
#include "ScopedIcuLocale.h"
#include "unicode/locid.h"
#include "unicode/brkiter.h"
#include "utils/misc.h"
#include "utils/Log.h"
#include "ScopedStringChars.h"
#include "ScopedPrimitiveArray.h"
#include "JNIHelp.h"
#include "core_jni_helpers.h"
#include <cstdint>
#include <vector>
#include <list>
#include <algorithm>
#include "SkPaint.h"
#include "SkTypeface.h"
#include "MinikinSkia.h"
#include "MinikinUtils.h"
#include "Paint.h"
#include "minikin/LineBreaker.h"
namespace android {
struct JLineBreaksID {
jfieldID breaks;
jfieldID widths;
jfieldID flags;
};
static jclass gLineBreaks_class;
static JLineBreaksID gLineBreaks_fieldID;
// set text and set a number of parameters for creating a layout (width, tabstops, strategy)
static void nSetupParagraph(JNIEnv* env, jclass, jlong nativePtr, jcharArray text, jint length,
jfloat firstWidth, jint firstWidthLineLimit, jfloat restWidth,
jintArray variableTabStops, jint defaultTabStop, jint strategy) {
LineBreaker* b = reinterpret_cast<LineBreaker*>(nativePtr);
b->resize(length);
env->GetCharArrayRegion(text, 0, length, b->buffer());
b->setText();
b->setLineWidths(firstWidth, firstWidthLineLimit, restWidth);
if (variableTabStops == nullptr) {
b->setTabStops(nullptr, 0, defaultTabStop);
} else {
ScopedIntArrayRO stops(env, variableTabStops);
b->setTabStops(stops.get(), stops.size(), defaultTabStop);
}
b->setStrategy(static_cast<BreakStrategy>(strategy));
}
static void recycleCopy(JNIEnv* env, jobject recycle, jintArray recycleBreaks,
jfloatArray recycleWidths, jintArray recycleFlags,
jint recycleLength, size_t nBreaks, const jint* breaks,
const jfloat* widths, const jint* flags) {
if ((size_t)recycleLength < nBreaks) {
// have to reallocate buffers
recycleBreaks = env->NewIntArray(nBreaks);
recycleWidths = env->NewFloatArray(nBreaks);
recycleFlags = env->NewIntArray(nBreaks);
env->SetObjectField(recycle, gLineBreaks_fieldID.breaks, recycleBreaks);
env->SetObjectField(recycle, gLineBreaks_fieldID.widths, recycleWidths);
env->SetObjectField(recycle, gLineBreaks_fieldID.flags, recycleFlags);
}
// copy data
env->SetIntArrayRegion(recycleBreaks, 0, nBreaks, breaks);
env->SetFloatArrayRegion(recycleWidths, 0, nBreaks, widths);
env->SetIntArrayRegion(recycleFlags, 0, nBreaks, flags);
}
static jint nComputeLineBreaks(JNIEnv* env, jclass, jlong nativePtr,
jobject recycle, jintArray recycleBreaks,
jfloatArray recycleWidths, jintArray recycleFlags,
jint recycleLength) {
LineBreaker* b = reinterpret_cast<LineBreaker*>(nativePtr);
size_t nBreaks = b->computeBreaks();
recycleCopy(env, recycle, recycleBreaks, recycleWidths, recycleFlags, recycleLength,
nBreaks, b->getBreaks(), b->getWidths(), b->getFlags());
b->finish();
return static_cast<jint>(nBreaks);
}
static jlong nNewBuilder(JNIEnv*, jclass) {
return reinterpret_cast<jlong>(new LineBreaker);
}
static void nFreeBuilder(JNIEnv*, jclass, jlong nativePtr) {
delete reinterpret_cast<LineBreaker*>(nativePtr);
}
static void nFinishBuilder(JNIEnv*, jclass, jlong nativePtr) {
LineBreaker* b = reinterpret_cast<LineBreaker*>(nativePtr);
b->finish();
}
static jlong nLoadHyphenator(JNIEnv* env, jclass, jstring patternData) {
ScopedStringChars str(env, patternData);
Hyphenator* hyphenator = Hyphenator::load(str.get(), str.size());
return reinterpret_cast<jlong>(hyphenator);
}
static void nSetLocale(JNIEnv* env, jclass, jlong nativePtr, jstring javaLocaleName,
jlong nativeHyphenator) {
ScopedIcuLocale icuLocale(env, javaLocaleName);
LineBreaker* b = reinterpret_cast<LineBreaker*>(nativePtr);
Hyphenator* hyphenator = reinterpret_cast<Hyphenator*>(nativeHyphenator);
if (icuLocale.valid()) {
b->setLocale(icuLocale.locale(), hyphenator);
}
}
static void nSetIndents(JNIEnv* env, jclass, jlong nativePtr, jintArray indents) {
ScopedIntArrayRO indentArr(env, indents);
std::vector<float> indentVec(indentArr.get(), indentArr.get() + indentArr.size());
LineBreaker* b = reinterpret_cast<LineBreaker*>(nativePtr);
b->setIndents(indentVec);
}
// Basically similar to Paint.getTextRunAdvances but with C++ interface
static jfloat nAddStyleRun(JNIEnv* env, jclass, jlong nativePtr,
jlong nativePaint, jlong nativeTypeface, jint start, jint end, jboolean isRtl) {
LineBreaker* b = reinterpret_cast<LineBreaker*>(nativePtr);
Paint* paint = reinterpret_cast<Paint*>(nativePaint);
TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(nativeTypeface);
FontCollection *font;
MinikinPaint minikinPaint;
FontStyle style = MinikinUtils::prepareMinikinPaint(&minikinPaint, &font, paint, typeface);
return b->addStyleRun(&minikinPaint, font, style, start, end, isRtl);
}
// Accept width measurements for the run, passed in from Java
static void nAddMeasuredRun(JNIEnv* env, jclass, jlong nativePtr,
jint start, jint end, jfloatArray widths) {
LineBreaker* b = reinterpret_cast<LineBreaker*>(nativePtr);
env->GetFloatArrayRegion(widths, start, end - start, b->charWidths() + start);
b->addStyleRun(nullptr, nullptr, FontStyle{}, start, end, false);
}
static void nAddReplacementRun(JNIEnv* env, jclass, jlong nativePtr,
jint start, jint end, jfloat width) {
LineBreaker* b = reinterpret_cast<LineBreaker*>(nativePtr);
b->addReplacement(start, end, width);
}
static void nGetWidths(JNIEnv* env, jclass, jlong nativePtr, jfloatArray widths) {
LineBreaker* b = reinterpret_cast<LineBreaker*>(nativePtr);
env->SetFloatArrayRegion(widths, 0, b->size(), b->charWidths());
}
static JNINativeMethod gMethods[] = {
// TODO performance: many of these are candidates for fast jni, awaiting guidance
{"nNewBuilder", "()J", (void*) nNewBuilder},
{"nFreeBuilder", "(J)V", (void*) nFreeBuilder},
{"nFinishBuilder", "(J)V", (void*) nFinishBuilder},
{"nLoadHyphenator", "(Ljava/lang/String;)J", (void*) nLoadHyphenator},
{"nSetLocale", "(JLjava/lang/String;J)V", (void*) nSetLocale},
{"nSetupParagraph", "(J[CIFIF[III)V", (void*) nSetupParagraph},
{"nSetIndents", "(J[I)V", (void*) nSetIndents},
{"nAddStyleRun", "(JJJIIZ)F", (void*) nAddStyleRun},
{"nAddMeasuredRun", "(JII[F)V", (void*) nAddMeasuredRun},
{"nAddReplacementRun", "(JIIF)V", (void*) nAddReplacementRun},
{"nGetWidths", "(J[F)V", (void*) nGetWidths},
{"nComputeLineBreaks", "(JLandroid/text/StaticLayout$LineBreaks;[I[F[II)I",
(void*) nComputeLineBreaks}
};
int register_android_text_StaticLayout(JNIEnv* env)
{
gLineBreaks_class = MakeGlobalRefOrDie(env,
FindClassOrDie(env, "android/text/StaticLayout$LineBreaks"));
gLineBreaks_fieldID.breaks = GetFieldIDOrDie(env, gLineBreaks_class, "breaks", "[I");
gLineBreaks_fieldID.widths = GetFieldIDOrDie(env, gLineBreaks_class, "widths", "[F");
gLineBreaks_fieldID.flags = GetFieldIDOrDie(env, gLineBreaks_class, "flags", "[I");
return RegisterMethodsOrDie(env, "android/text/StaticLayout", gMethods, NELEM(gMethods));
}
}
|