1 | /* |
2 | * Copyright (C) 2010, 2011, 2012 Igalia S.L. |
3 | * Copyright (C) 2013 Samsung Electronics |
4 | * |
5 | * This library is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU Library General Public |
7 | * License as published by the Free Software Foundation; either |
8 | * version 2 of the License, or (at your option) any later version. |
9 | * |
10 | * This library is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | * Library General Public License for more details. |
14 | * |
15 | * You should have received a copy of the GNU Library General Public License |
16 | * along with this library; see the file COPYING.LIB. If not, write to |
17 | * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
18 | * Boston, MA 02110-1301, USA. |
19 | */ |
20 | |
21 | #include "config.h" |
22 | #include "WebKitAccessibleHyperlink.h" |
23 | |
24 | #if HAVE(ACCESSIBILITY) |
25 | |
26 | #include "AXObjectCache.h" |
27 | #include "AccessibilityObject.h" |
28 | #include "Editing.h" |
29 | #include "NotImplemented.h" |
30 | #include "Position.h" |
31 | #include "Range.h" |
32 | #include "RenderListMarker.h" |
33 | #include "RenderObject.h" |
34 | #include "TextIterator.h" |
35 | #include "WebKitAccessible.h" |
36 | #include "WebKitAccessibleUtil.h" |
37 | #include <wtf/glib/WTFGType.h> |
38 | #include <wtf/text/CString.h> |
39 | |
40 | using namespace WebCore; |
41 | |
42 | static void webkit_accessible_hyperlink_atk_action_interface_init(AtkActionIface*); |
43 | |
44 | struct _WebKitAccessibleHyperlinkPrivate { |
45 | WebKitAccessible* hyperlinkImpl; |
46 | |
47 | // We cache these values so we can return them as const values. |
48 | CString actionName; |
49 | CString actionKeyBinding; |
50 | }; |
51 | |
52 | WEBKIT_DEFINE_TYPE_WITH_CODE( |
53 | WebKitAccessibleHyperlink, webkit_accessible_hyperlink, ATK_TYPE_HYPERLINK, |
54 | G_IMPLEMENT_INTERFACE(ATK_TYPE_ACTION, webkit_accessible_hyperlink_atk_action_interface_init)) |
55 | |
56 | enum { |
57 | PROP_0, |
58 | |
59 | PROP_HYPERLINK_IMPL |
60 | }; |
61 | |
62 | static gboolean webkitAccessibleHyperlinkActionDoAction(AtkAction* action, gint) |
63 | { |
64 | auto* accessibleHyperlink = WEBKIT_ACCESSIBLE_HYPERLINK(action); |
65 | returnValIfWebKitAccessibleIsInvalid(accessibleHyperlink->priv->hyperlinkImpl, FALSE); |
66 | |
67 | if (!ATK_IS_ACTION(accessibleHyperlink->priv->hyperlinkImpl)) |
68 | return FALSE; |
69 | |
70 | auto& coreObject = webkitAccessibleGetAccessibilityObject(accessibleHyperlink->priv->hyperlinkImpl); |
71 | return coreObject.performDefaultAction(); |
72 | } |
73 | |
74 | static gint webkitAccessibleHyperlinkActionGetNActions(AtkAction* action) |
75 | { |
76 | auto* accessibleHyperlink = WEBKIT_ACCESSIBLE_HYPERLINK(action); |
77 | returnValIfWebKitAccessibleIsInvalid(accessibleHyperlink->priv->hyperlinkImpl, 0); |
78 | |
79 | return ATK_IS_ACTION(accessibleHyperlink->priv->hyperlinkImpl) ? 1 : 0; |
80 | } |
81 | |
82 | static const gchar* webkitAccessibleHyperlinkActionGetDescription(AtkAction* action, gint) |
83 | { |
84 | auto* accessibleHyperlink = WEBKIT_ACCESSIBLE_HYPERLINK(action); |
85 | returnValIfWebKitAccessibleIsInvalid(accessibleHyperlink->priv->hyperlinkImpl, nullptr); |
86 | |
87 | // TODO: Need a way to provide/localize action descriptions. |
88 | notImplemented(); |
89 | return "" ; |
90 | } |
91 | |
92 | static const gchar* webkitAccessibleHyperlinkActionGetKeybinding(AtkAction* action, gint) |
93 | { |
94 | auto* accessibleHyperlink = WEBKIT_ACCESSIBLE_HYPERLINK(action); |
95 | returnValIfWebKitAccessibleIsInvalid(accessibleHyperlink->priv->hyperlinkImpl, nullptr); |
96 | |
97 | if (!ATK_IS_ACTION(accessibleHyperlink->priv->hyperlinkImpl)) |
98 | return nullptr; |
99 | |
100 | auto& coreObject = webkitAccessibleGetAccessibilityObject(accessibleHyperlink->priv->hyperlinkImpl); |
101 | accessibleHyperlink->priv->actionKeyBinding = coreObject.accessKey().string().utf8(); |
102 | return accessibleHyperlink->priv->actionKeyBinding.data(); |
103 | } |
104 | |
105 | static const gchar* webkitAccessibleHyperlinkActionGetName(AtkAction* action, gint) |
106 | { |
107 | auto* accessibleHyperlink = WEBKIT_ACCESSIBLE_HYPERLINK(action); |
108 | returnValIfWebKitAccessibleIsInvalid(accessibleHyperlink->priv->hyperlinkImpl, nullptr); |
109 | |
110 | if (!ATK_IS_ACTION(accessibleHyperlink->priv->hyperlinkImpl)) |
111 | return nullptr; |
112 | |
113 | auto& coreObject = webkitAccessibleGetAccessibilityObject(accessibleHyperlink->priv->hyperlinkImpl); |
114 | accessibleHyperlink->priv->actionName = coreObject.actionVerb().utf8(); |
115 | return accessibleHyperlink->priv->actionName.data(); |
116 | } |
117 | |
118 | static void webkit_accessible_hyperlink_atk_action_interface_init(AtkActionIface* iface) |
119 | { |
120 | iface->do_action = webkitAccessibleHyperlinkActionDoAction; |
121 | iface->get_n_actions = webkitAccessibleHyperlinkActionGetNActions; |
122 | iface->get_description = webkitAccessibleHyperlinkActionGetDescription; |
123 | iface->get_keybinding = webkitAccessibleHyperlinkActionGetKeybinding; |
124 | iface->get_name = webkitAccessibleHyperlinkActionGetName; |
125 | } |
126 | |
127 | static gchar* webkitAccessibleHyperlinkGetURI(AtkHyperlink* link, gint index) |
128 | { |
129 | // FIXME: Do NOT support more than one instance of an AtkObject |
130 | // implementing AtkHyperlinkImpl in every instance of AtkHyperLink |
131 | if (index) |
132 | return nullptr; |
133 | |
134 | auto* accessibleHyperlink = WEBKIT_ACCESSIBLE_HYPERLINK(link); |
135 | returnValIfWebKitAccessibleIsInvalid(accessibleHyperlink->priv->hyperlinkImpl, nullptr); |
136 | |
137 | auto& coreObject = webkitAccessibleGetAccessibilityObject(accessibleHyperlink->priv->hyperlinkImpl); |
138 | return !coreObject.url().isNull() ? g_strdup(coreObject.url().string().utf8().data()) : nullptr; |
139 | } |
140 | |
141 | static AtkObject* webkitAccessibleHyperlinkGetObject(AtkHyperlink* link, gint index) |
142 | { |
143 | // FIXME: Do NOT support more than one instance of an AtkObject |
144 | // implementing AtkHyperlinkImpl in every instance of AtkHyperLink |
145 | if (index) |
146 | return nullptr; |
147 | |
148 | auto* accessibleHyperlink = WEBKIT_ACCESSIBLE_HYPERLINK(link); |
149 | returnValIfWebKitAccessibleIsInvalid(accessibleHyperlink->priv->hyperlinkImpl, 0); |
150 | |
151 | return ATK_OBJECT(accessibleHyperlink->priv->hyperlinkImpl); |
152 | } |
153 | |
154 | static gint rangeLengthForObject(AccessibilityObject& obj, Range* range) |
155 | { |
156 | // This is going to be the actual length in most of the cases |
157 | int baseLength = TextIterator::rangeLength(range, true); |
158 | |
159 | // Check whether the current hyperlink belongs to a list item. |
160 | // If so, we need to consider the length of the item's marker |
161 | AccessibilityObject* parent = obj.parentObjectUnignored(); |
162 | if (!parent || !parent->isAccessibilityRenderObject() || !parent->isListItem()) |
163 | return baseLength; |
164 | |
165 | // Even if we don't expose list markers to Assistive |
166 | // Technologies, we need to have a way to measure their length |
167 | // for those cases when it's needed to take it into account |
168 | // separately (as in getAccessibilityObjectForOffset) |
169 | AccessibilityObject* markerObj = parent->firstChild(); |
170 | if (!markerObj) |
171 | return baseLength; |
172 | |
173 | RenderObject* renderer = markerObj->renderer(); |
174 | if (!is<RenderListMarker>(renderer)) |
175 | return baseLength; |
176 | |
177 | auto& marker = downcast<RenderListMarker>(*renderer); |
178 | return baseLength + marker.text().length() + marker.suffix().length(); |
179 | } |
180 | |
181 | static gint webkitAccessibleHyperlinkGetStartIndex(AtkHyperlink* link) |
182 | { |
183 | auto* accessibleHyperlink = WEBKIT_ACCESSIBLE_HYPERLINK(link); |
184 | returnValIfWebKitAccessibleIsInvalid(accessibleHyperlink->priv->hyperlinkImpl, 0); |
185 | |
186 | auto& coreObject = webkitAccessibleGetAccessibilityObject(accessibleHyperlink->priv->hyperlinkImpl); |
187 | AccessibilityObject* parentUnignored = coreObject.parentObjectUnignored(); |
188 | if (!parentUnignored) |
189 | return 0; |
190 | |
191 | Node* node = coreObject.node(); |
192 | if (!node) |
193 | return 0; |
194 | |
195 | Node* parentNode = parentUnignored->node(); |
196 | if (!parentNode) |
197 | return 0; |
198 | |
199 | auto range = Range::create(node->document(), firstPositionInOrBeforeNode(parentNode), firstPositionInOrBeforeNode(node)); |
200 | return rangeLengthForObject(coreObject, range.ptr()); |
201 | } |
202 | |
203 | static gint webkitAccessibleHyperlinkGetEndIndex(AtkHyperlink* link) |
204 | { |
205 | auto* accessibleHyperlink = WEBKIT_ACCESSIBLE_HYPERLINK(link); |
206 | returnValIfWebKitAccessibleIsInvalid(accessibleHyperlink->priv->hyperlinkImpl, 0); |
207 | |
208 | auto& coreObject = webkitAccessibleGetAccessibilityObject(accessibleHyperlink->priv->hyperlinkImpl); |
209 | AccessibilityObject* parentUnignored = coreObject.parentObjectUnignored(); |
210 | if (!parentUnignored) |
211 | return 0; |
212 | |
213 | Node* node = coreObject.node(); |
214 | if (!node) |
215 | return 0; |
216 | |
217 | Node* parentNode = parentUnignored->node(); |
218 | if (!parentNode) |
219 | return 0; |
220 | |
221 | auto range = Range::create(node->document(), firstPositionInOrBeforeNode(parentNode), lastPositionInOrAfterNode(node)); |
222 | return rangeLengthForObject(coreObject, range.ptr()); |
223 | } |
224 | |
225 | static gboolean webkitAccessibleHyperlinkIsValid(AtkHyperlink* link) |
226 | { |
227 | auto* accessibleHyperlink = WEBKIT_ACCESSIBLE_HYPERLINK(link); |
228 | returnValIfWebKitAccessibleIsInvalid(accessibleHyperlink->priv->hyperlinkImpl, FALSE); |
229 | |
230 | // Link is valid for the whole object's lifetime |
231 | return TRUE; |
232 | } |
233 | |
234 | static gint webkitAccessibleHyperlinkGetNAnchors(AtkHyperlink* link) |
235 | { |
236 | // FIXME Do NOT support more than one instance of an AtkObject |
237 | // implementing AtkHyperlinkImpl in every instance of AtkHyperLink |
238 | auto* accessibleHyperlink = WEBKIT_ACCESSIBLE_HYPERLINK(link); |
239 | returnValIfWebKitAccessibleIsInvalid(accessibleHyperlink->priv->hyperlinkImpl, 0); |
240 | |
241 | return 1; |
242 | } |
243 | |
244 | static gboolean webkitAccessibleHyperlinkIsSelectedLink(AtkHyperlink* link) |
245 | { |
246 | auto* accessibleHyperlink = WEBKIT_ACCESSIBLE_HYPERLINK(link); |
247 | returnValIfWebKitAccessibleIsInvalid(accessibleHyperlink->priv->hyperlinkImpl, FALSE); |
248 | |
249 | // Not implemented: this function is deprecated in ATK now |
250 | notImplemented(); |
251 | return FALSE; |
252 | } |
253 | |
254 | static void webkitAccessibleHyperlinkGetProperty(GObject* object, guint propId, GValue* value, GParamSpec* pspec) |
255 | { |
256 | auto* accessibleHyperlink = WEBKIT_ACCESSIBLE_HYPERLINK(object); |
257 | |
258 | switch (propId) { |
259 | case PROP_HYPERLINK_IMPL: |
260 | g_value_set_object(value, accessibleHyperlink->priv->hyperlinkImpl); |
261 | break; |
262 | default: |
263 | G_OBJECT_WARN_INVALID_PROPERTY_ID(object, propId, pspec); |
264 | } |
265 | } |
266 | |
267 | static void webkitAccessibleHyperlinkSetProperty(GObject* object, guint propId, const GValue* value, GParamSpec* pspec) |
268 | { |
269 | auto* accessibleHyperlink = WEBKIT_ACCESSIBLE_HYPERLINK(object); |
270 | |
271 | switch (propId) { |
272 | case PROP_HYPERLINK_IMPL: |
273 | accessibleHyperlink->priv->hyperlinkImpl = WEBKIT_ACCESSIBLE(g_value_get_object(value)); |
274 | break; |
275 | default: |
276 | G_OBJECT_WARN_INVALID_PROPERTY_ID(object, propId, pspec); |
277 | } |
278 | } |
279 | |
280 | static void webkit_accessible_hyperlink_class_init(WebKitAccessibleHyperlinkClass* klass) |
281 | { |
282 | GObjectClass* gobjectClass = G_OBJECT_CLASS(klass); |
283 | gobjectClass->set_property = webkitAccessibleHyperlinkSetProperty; |
284 | gobjectClass->get_property = webkitAccessibleHyperlinkGetProperty; |
285 | |
286 | AtkHyperlinkClass* atkHyperlinkClass = ATK_HYPERLINK_CLASS(klass); |
287 | atkHyperlinkClass->get_uri = webkitAccessibleHyperlinkGetURI; |
288 | atkHyperlinkClass->get_object = webkitAccessibleHyperlinkGetObject; |
289 | atkHyperlinkClass->get_start_index = webkitAccessibleHyperlinkGetStartIndex; |
290 | atkHyperlinkClass->get_end_index = webkitAccessibleHyperlinkGetEndIndex; |
291 | atkHyperlinkClass->is_valid = webkitAccessibleHyperlinkIsValid; |
292 | atkHyperlinkClass->get_n_anchors = webkitAccessibleHyperlinkGetNAnchors; |
293 | atkHyperlinkClass->is_selected_link = webkitAccessibleHyperlinkIsSelectedLink; |
294 | |
295 | g_object_class_install_property(gobjectClass, PROP_HYPERLINK_IMPL, |
296 | g_param_spec_object("hyperlink-impl" , |
297 | "Hyperlink implementation" , |
298 | "The associated WebKitAccessible instance." , |
299 | WEBKIT_TYPE_ACCESSIBLE, |
300 | static_cast<GParamFlags>(WEBKIT_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY))); |
301 | } |
302 | |
303 | WebKitAccessibleHyperlink* webkitAccessibleHyperlinkGetOrCreate(AtkHyperlinkImpl* hyperlinkImpl) |
304 | { |
305 | g_return_val_if_fail(ATK_IS_HYPERLINK_IMPL(hyperlinkImpl), nullptr); |
306 | g_return_val_if_fail(WEBKIT_IS_ACCESSIBLE(hyperlinkImpl), nullptr); |
307 | |
308 | if (auto* currentHyperLink = g_object_get_data(G_OBJECT(hyperlinkImpl), "webkit-accessible-hyperlink-object" )) |
309 | return WEBKIT_ACCESSIBLE_HYPERLINK(g_object_ref(currentHyperLink)); |
310 | |
311 | auto* hyperlink = WEBKIT_ACCESSIBLE_HYPERLINK(g_object_new(WEBKIT_TYPE_ACCESSIBLE_HYPERLINK, "hyperlink-impl" , hyperlinkImpl, nullptr)); |
312 | g_object_set_data_full(G_OBJECT(hyperlinkImpl), "webkit-accessible-hyperlink-object" , hyperlink, g_object_unref); |
313 | return hyperlink; |
314 | } |
315 | |
316 | #endif // HAVE(ACCESSIBILITY) |
317 | |