AndroidHitTestResult.cpp revision dea0c131566f424923425970fe5621305d136e5a 
1/*
2 * Copyright 2012, The Android Open Source Project
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *  * Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 *  * Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#define LOG_TAG "AndroidHitTestResult"
27
28#include "config.h"
29#include "AndroidHitTestResult.h"
30
31#include "Element.h"
32#include "HitTestResult.h"
33#include "KURL.h"
34#include "LayerAndroid.h"
35#include "PlatformString.h"
36#include "Range.h"
37#include "RenderLayer.h"
38#include "RenderLayerBacking.h"
39#include "RenderObject.h"
40#include "WebCoreJni.h"
41#include "WebViewCore.h"
42
43#include <cutils/log.h>
44#include <JNIHelp.h>
45#include <JNIUtility.h>
46
47namespace android {
48
49using namespace WebCore;
50
51static bool gJniInitialized = false;
52static struct JavaGlue {
53    jmethodID m_hitTestInit;
54    jfieldID m_hitTestLinkUrl;
55    jfieldID m_hitTestAnchorText;
56    jfieldID m_hitTestImageUrl;
57    jfieldID m_hitTestAltDisplayString;
58    jfieldID m_hitTestTitle;
59    jfieldID m_hitTestEditable;
60    jfieldID m_hitTestTouchRects;
61    jfieldID m_hitTestTapHighlightColor;
62} gJavaGlue;
63
64struct field {
65    jclass m_class;
66    const char *m_fieldName;
67    const char *m_fieldType;
68    jfieldID *m_jfield;
69};
70
71static void InitJni(JNIEnv* env)
72{
73    if (gJniInitialized)
74        return;
75
76    jclass rectClass = env->FindClass("android/graphics/Rect");
77    ALOG_ASSERT(rectClass, "Could not find android/graphics/Rect");
78    jclass hitTestClass = env->FindClass("android/webkit/WebViewCore$WebKitHitTest");
79    ALOG_ASSERT(hitTestClass, "Could not find android/webkit/WebViewCore$WebKitHitTest");
80
81    gJavaGlue.m_hitTestInit = env->GetMethodID(hitTestClass, "<init>",  "()V");
82    ALOG_ASSERT(gJavaGlue.m_hitTestInit, "Could not find init method on android/webkit/WebViewCore$WebKitHitTest");
83
84    field fields[] = {
85        { hitTestClass, "mTouchRects", "[Landroid/graphics/Rect;", &gJavaGlue.m_hitTestTouchRects },
86        { hitTestClass, "mEditable", "Z", &gJavaGlue.m_hitTestEditable },
87        { hitTestClass, "mLinkUrl", "Ljava/lang/String;", &gJavaGlue.m_hitTestLinkUrl },
88        { hitTestClass, "mAnchorText", "Ljava/lang/String;", &gJavaGlue.m_hitTestAnchorText },
89        { hitTestClass, "mImageUrl", "Ljava/lang/String;", &gJavaGlue.m_hitTestImageUrl },
90        { hitTestClass, "mAltDisplayString", "Ljava/lang/String;", &gJavaGlue.m_hitTestAltDisplayString },
91        { hitTestClass, "mTitle", "Ljava/lang/String;", &gJavaGlue.m_hitTestTitle },
92        { hitTestClass, "mTapHighlightColor", "I", &gJavaGlue.m_hitTestTapHighlightColor },
93        {0, 0, 0, 0},
94    };
95
96    for (int i = 0; fields[i].m_jfield; i++) {
97        field *f = &fields[i];
98        jfieldID field = env->GetFieldID(f->m_class, f->m_fieldName, f->m_fieldType);
99        ALOG_ASSERT(field, "Can't find %s", f->m_fieldName);
100        *(f->m_jfield) = field;
101    }
102
103    gJniInitialized = true;
104}
105
106AndroidHitTestResult::AndroidHitTestResult(WebCore::HitTestResult& hitTestResult)
107    : m_hitTestResult(hitTestResult)
108{
109}
110
111void setStringField(JNIEnv* env, jobject obj, jfieldID field, const String& str)
112{
113    jstring jstr = wtfStringToJstring(env, str, false);
114    env->SetObjectField(obj, field, jstr);
115    env->DeleteLocalRef(jstr);
116}
117
118void setRectArray(JNIEnv* env, jobject obj, jfieldID field, Vector<IntRect> &rects)
119{
120    jobjectArray array = intRectVectorToRectArray(env, rects);
121    env->SetObjectField(obj, field, array);
122    env->DeleteLocalRef(array);
123}
124
125// Some helper macros specific to setting hitTest fields
126#define _SET(jtype, jfield, value) env->Set ## jtype ## Field(hitTest, gJavaGlue.m_hitTest ## jfield, value)
127#define SET_BOOL(jfield, value) _SET(Boolean, jfield, value)
128#define SET_STRING(jfield, value) setStringField(env, hitTest, gJavaGlue.m_hitTest ## jfield, value)
129#define SET_INT(jfield, value) _SET(Int, jfield, value)
130
131jobject AndroidHitTestResult::createJavaObject(JNIEnv* env)
132{
133    InitJni(env);
134    jclass hitTestClass = env->FindClass("android/webkit/WebViewCore$WebKitHitTest");
135    ALOG_ASSERT(hitTestClass, "Could not find android/webkit/WebViewCore$WebKitHitTest");
136
137    jobject hitTest = env->NewObject(hitTestClass, gJavaGlue.m_hitTestInit);
138    setRectArray(env, hitTest, gJavaGlue.m_hitTestTouchRects, m_highlightRects);
139
140    SET_BOOL(Editable, m_hitTestResult.isContentEditable());
141    SET_STRING(LinkUrl, m_hitTestResult.absoluteLinkURL().string());
142    SET_STRING(ImageUrl, m_hitTestResult.absoluteImageURL().string());
143    SET_STRING(AltDisplayString, m_hitTestResult.altDisplayString());
144    TextDirection titleTextDirection;
145    SET_STRING(Title, m_hitTestResult.title(titleTextDirection));
146    if (m_hitTestResult.URLElement()) {
147        Element* urlElement = m_hitTestResult.URLElement();
148        SET_STRING(AnchorText, urlElement->innerText());
149        if (urlElement->renderer()) {
150            SET_INT(TapHighlightColor,
151                    urlElement->renderer()->style()->tapHighlightColor().rgb());
152        }
153    }
154
155    env->DeleteLocalRef(hitTestClass);
156
157    return hitTest;
158}
159
160} /* namespace android */
161