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1 /* | 1 /* |
2 * Copyright (C) 2008 Apple Inc. All rights reserved. | 2 * Copyright (C) 2008 Apple Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
6 * are met: | 6 * are met: |
7 * | 7 * |
8 * 1. Redistributions of source code must retain the above copyright | 8 * 1. Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * 2. Redistributions in binary form must reproduce the above copyright | 10 * 2. Redistributions in binary form must reproduce the above copyright |
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246 if (!m_renderer || !m_renderer->isBox()) | 246 if (!m_renderer || !m_renderer->isBox()) |
247 return 0; | 247 return 0; |
248 | 248 |
249 RenderBox* box = toRenderBox(m_renderer); | 249 RenderBox* box = toRenderBox(m_renderer); |
250 if (!box->canBeScrolledAndHasScrollableArea()) | 250 if (!box->canBeScrolledAndHasScrollableArea()) |
251 return 0; | 251 return 0; |
252 | 252 |
253 return box->scrollableArea(); | 253 return box->scrollableArea(); |
254 } | 254 } |
255 | 255 |
256 static bool isImageOrAltText(RenderBoxModelObject* box, Node* node) | |
257 { | |
258 if (box && box->isImage()) | |
259 return true; | |
260 if (isHTMLImageElement(node)) | |
261 return true; | |
262 if (isHTMLInputElement(node) && toHTMLInputElement(node)->hasFallbackContent
()) | |
263 return true; | |
264 return false; | |
265 } | |
266 | |
267 AccessibilityRole AXRenderObject::determineAccessibilityRole() | 256 AccessibilityRole AXRenderObject::determineAccessibilityRole() |
268 { | 257 { |
269 if (!m_renderer) | 258 if (!m_renderer) |
270 return UnknownRole; | 259 return UnknownRole; |
271 | 260 |
272 m_ariaRole = determineAriaRoleAttribute(); | 261 m_ariaRole = determineAriaRoleAttribute(); |
273 | 262 |
274 Node* node = m_renderer->node(); | 263 Node* node = m_renderer->node(); |
275 AccessibilityRole ariaRole = ariaRoleAttribute(); | 264 AccessibilityRole ariaRole = ariaRoleAttribute(); |
276 if (ariaRole != UnknownRole) | 265 if (ariaRole != UnknownRole) |
277 return ariaRole; | 266 return ariaRole; |
278 | 267 |
279 RenderBoxModelObject* cssBox = renderBoxModelObject(); | 268 RenderBoxModelObject* cssBox = renderBoxModelObject(); |
280 | 269 |
281 if (node && node->isLink()) { | 270 if (node && node->isLink()) { |
282 if (isImageOrAltText(cssBox, node)) | 271 if (cssBox && cssBox->isImage()) |
283 return ImageMapRole; | 272 return ImageMapRole; |
284 return LinkRole; | 273 return LinkRole; |
285 } | 274 } |
286 if ((cssBox && cssBox->isListItem()) || isHTMLLIElement(node)) | 275 if ((cssBox && cssBox->isListItem()) || isHTMLLIElement(node)) |
287 return ListItemRole; | 276 return ListItemRole; |
288 if (m_renderer->isListMarker()) | 277 if (m_renderer->isListMarker()) |
289 return ListMarkerRole; | 278 return ListMarkerRole; |
290 if (isHTMLButtonElement(node)) | 279 if (isHTMLButtonElement(node)) |
291 return buttonRoleType(); | 280 return buttonRoleType(); |
292 if (isHTMLDetailsElement(node)) | 281 if (isHTMLDetailsElement(node)) |
293 return DetailsRole; | 282 return DetailsRole; |
294 if (isHTMLSummaryElement(node)) { | 283 if (isHTMLSummaryElement(node)) { |
295 if (node->parentElement() && isHTMLDetailsElement(node->parentElement())
) | 284 if (node->parentElement() && isHTMLDetailsElement(node->parentElement())
) |
296 return DisclosureTriangleRole; | 285 return DisclosureTriangleRole; |
297 return UnknownRole; | 286 return UnknownRole; |
298 } | 287 } |
299 if (isHTMLLegendElement(node)) | 288 if (isHTMLLegendElement(node)) |
300 return LegendRole; | 289 return LegendRole; |
301 if (m_renderer->isText()) | 290 if (m_renderer->isText()) |
302 return StaticTextRole; | 291 return StaticTextRole; |
303 if (isImageOrAltText(cssBox, node)) { | 292 if (cssBox && cssBox->isImage()) { |
304 if (isHTMLInputElement(node)) | 293 if (isHTMLInputElement(node)) |
305 return ariaHasPopup() ? PopUpButtonRole : ButtonRole; | 294 return ariaHasPopup() ? PopUpButtonRole : ButtonRole; |
306 if (isSVGImage()) | 295 if (isSVGImage()) |
307 return SVGRootRole; | 296 return SVGRootRole; |
308 return ImageRole; | 297 return ImageRole; |
309 } | 298 } |
310 | 299 |
311 // Note: if JavaScript is disabled, the renderer won't be a RenderHTMLCanvas
. | 300 // Note: if JavaScript is disabled, the renderer won't be a RenderHTMLCanvas
. |
312 if (isHTMLCanvasElement(node) && m_renderer->isCanvas()) | 301 if (isHTMLCanvasElement(node) && m_renderer->isCanvas()) |
313 return CanvasRole; | 302 return CanvasRole; |
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784 Element* elt = toElement(node); | 773 Element* elt = toElement(node); |
785 const AtomicString& alt = elt->getAttribute(altAttr); | 774 const AtomicString& alt = elt->getAttribute(altAttr); |
786 // don't ignore an image that has an alt tag | 775 // don't ignore an image that has an alt tag |
787 if (!alt.string().containsOnlyWhitespace()) | 776 if (!alt.string().containsOnlyWhitespace()) |
788 return false; | 777 return false; |
789 // informal standard is to ignore images with zero-length alt string
s | 778 // informal standard is to ignore images with zero-length alt string
s |
790 if (!alt.isNull()) | 779 if (!alt.isNull()) |
791 return true; | 780 return true; |
792 } | 781 } |
793 | 782 |
794 if (isNativeImage() && isImageOrAltText(toRenderBoxModelObject(m_rendere
r), node)) { | 783 if (isNativeImage() && m_renderer->isImage()) { |
795 // check for one-dimensional image | 784 // check for one-dimensional image |
796 RenderImage* image = toRenderImage(m_renderer); | 785 RenderImage* image = toRenderImage(m_renderer); |
797 if (image->height() <= 1 || image->width() <= 1) | 786 if (image->height() <= 1 || image->width() <= 1) |
798 return true; | 787 return true; |
799 | 788 |
800 // check whether rendered image was stretched from one-dimensional f
ile image | 789 // check whether rendered image was stretched from one-dimensional f
ile image |
801 if (image->cachedImage()) { | 790 if (image->cachedImage()) { |
802 LayoutSize imageSize = image->cachedImage()->imageSizeForRendere
r(m_renderer, image->view()->zoomFactor()); | 791 LayoutSize imageSize = image->cachedImage()->imageSizeForRendere
r(m_renderer, image->view()->zoomFactor()); |
803 return imageSize.height() <= 1 || imageSize.width() <= 1; | 792 return imageSize.height() <= 1 || imageSize.width() <= 1; |
804 } | 793 } |
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2464 if (label && label->renderer()) { | 2453 if (label && label->renderer()) { |
2465 LayoutRect labelRect = axObjectCache()->getOrCreate(label)->elementR
ect(); | 2454 LayoutRect labelRect = axObjectCache()->getOrCreate(label)->elementR
ect(); |
2466 result.unite(labelRect); | 2455 result.unite(labelRect); |
2467 } | 2456 } |
2468 } | 2457 } |
2469 | 2458 |
2470 return result; | 2459 return result; |
2471 } | 2460 } |
2472 | 2461 |
2473 } // namespace blink | 2462 } // namespace blink |
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