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| 1 // Copyright 2017 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "core/editing/TextSuggestionController.h" |
| 6 |
| 7 #include "core/dom/Document.h" |
| 8 #include "core/editing/Editor.h" |
| 9 #include "core/editing/FrameSelection.h" |
| 10 #include "core/editing/InputMethodController.h" |
| 11 #include "core/editing/PlainTextRange.h" |
| 12 #include "core/editing/TextSuggestionInfo.h" |
| 13 #include "core/editing/TextSuggestionList.h" |
| 14 #include "core/editing/markers/DocumentMarker.h" |
| 15 #include "core/editing/markers/DocumentMarkerController.h" |
| 16 #include "core/frame/LocalFrame.h" |
| 17 #include "core/layout/LayoutTheme.h" |
| 18 #include "public/platform/InterfaceProvider.h" |
| 19 #include "public/platform/InterfaceRegistry.h" |
| 20 #include "wtf/Vector.h" |
| 21 |
| 22 namespace blink { |
| 23 |
| 24 namespace { |
| 25 |
| 26 const int kMaxNumberSuggestions = 5; |
| 27 const double kSuggestionUnderlineAlphaMultiplier = 0.4; |
| 28 |
| 29 } // anonymous namespace |
| 30 |
| 31 TextSuggestionController* TextSuggestionController::create(LocalFrame& frame) { |
| 32 return new TextSuggestionController(frame); |
| 33 } |
| 34 |
| 35 TextSuggestionController::TextSuggestionController(LocalFrame& frame) |
| 36 : m_suggestionMenuIsOpen(false), m_frame(&frame) {} |
| 37 |
| 38 bool TextSuggestionController::suggestionMenuIsOpen() const { |
| 39 return m_suggestionMenuIsOpen; |
| 40 } |
| 41 |
| 42 void TextSuggestionController::applySuggestionReplacement( |
| 43 int suggestionID, |
| 44 int suggestionIndex) { |
| 45 suggestionMenuClosed(); |
| 46 |
| 47 Element* rootEditableElement = |
| 48 frame() |
| 49 .selection() |
| 50 .computeVisibleSelectionInDOMTreeDeprecated() |
| 51 .rootEditableElement(); |
| 52 |
| 53 DocumentMarkerVector suggestionMarkers = |
| 54 rootEditableElement->document().markers().markersInRangeInclusive( |
| 55 firstEphemeralRangeOf( |
| 56 m_frame->selection() |
| 57 .computeVisibleSelectionInDOMTreeDeprecated()), |
| 58 DocumentMarker::Suggestion); |
| 59 |
| 60 SuggestionMarker* suggestionMarkerPtr = nullptr; |
| 61 for (Member<DocumentMarker>& marker : suggestionMarkers) { |
| 62 SuggestionMarker& suggestionMarker = toSuggestionMarker(*marker.get()); |
| 63 if (suggestionMarker.suggestionID() == suggestionID) { |
| 64 suggestionMarkerPtr = &suggestionMarker; |
| 65 break; |
| 66 } |
| 67 } |
| 68 |
| 69 // TODO: replace ALL suggestion markers with ID (could span multiple nodes) |
| 70 // We should always be able to find the marker we're replacing unless we have |
| 71 // a bug |
| 72 DCHECK(suggestionMarkerPtr); |
| 73 if (!suggestionMarkerPtr) |
| 74 return; |
| 75 |
| 76 const EphemeralRange rangeToReplace = |
| 77 PlainTextRange(suggestionMarkerPtr->startOffset(), suggestionMarkerPtr->en
dOffset()) |
| 78 .createRange(*rootEditableElement); |
| 79 |
| 80 // The entry in the suggestion drop-down that the user tapped on is replaced |
| 81 // by the text they just overwrote |
| 82 String replacement = |
| 83 String::fromUTF8(suggestionMarkerPtr->suggestions()[suggestionIndex].utf8(
)); |
| 84 String newSuggestion; |
| 85 { |
| 86 DocumentLifecycle::DisallowTransitionScope disallowTransition( |
| 87 document().lifecycle()); |
| 88 newSuggestion = |
| 89 plainText(rangeToReplace, TextIteratorBehavior::Builder().build()); |
| 90 } |
| 91 |
| 92 DCHECK(!rangeToReplace.isNull()); |
| 93 if (rangeToReplace.isNull()) |
| 94 return; |
| 95 |
| 96 frame().selection().setSelection( |
| 97 SelectionInDOMTree::Builder().setBaseAndExtent(rangeToReplace).build(), |
| 98 0); |
| 99 // Intentionally avoid sending JavaScript composition events |
| 100 frame().editor().replaceSelectionWithText( |
| 101 replacement, false, false, InputEvent::InputType::InsertReplacementText); |
| 102 |
| 103 suggestionMarkerPtr->replaceSuggestion(suggestionIndex, newSuggestion.utf8().d
ata()); |
| 104 } |
| 105 |
| 106 void TextSuggestionController::deleteSuggestionHighlight() { |
| 107 // We *do* want to remove markers touching the selection for this operation |
| 108 m_suggestionMenuIsOpen = false; |
| 109 |
| 110 Element* rootEditableElement = |
| 111 frame() |
| 112 .selection() |
| 113 .computeVisibleSelectionInDOMTreeDeprecated() |
| 114 .rootEditableElement(); |
| 115 DocumentMarkerVector suggestionHighlightMarkers = |
| 116 rootEditableElement->document().markers().markersInRangeInclusive( |
| 117 firstEphemeralRangeOf( |
| 118 m_frame->selection() |
| 119 .computeVisibleSelectionInDOMTreeDeprecated()), |
| 120 DocumentMarker::SuggestionHighlight); |
| 121 |
| 122 DCHECK(!suggestionHighlightMarkers.isEmpty()); |
| 123 if (suggestionHighlightMarkers.isEmpty()) |
| 124 return; |
| 125 |
| 126 const DocumentMarker* suggestionHighlightMarkerPtr = |
| 127 suggestionHighlightMarkers[0].get(); |
| 128 |
| 129 // If the character immediately following the range to be deleted is a space, |
| 130 // delete it if either of these conditions holds: |
| 131 // - We're deleting at the beginning of the editable text (to avoid ending up |
| 132 // with a space at the beginning) |
| 133 // - The character immediately before the range being deleted is also a space |
| 134 // (to avoid ending up with two adjacent spaces) |
| 135 |
| 136 bool deleteNextChar = false; |
| 137 |
| 138 const PlainTextRange nextCharacterRange( |
| 139 suggestionHighlightMarkerPtr->endOffset(), |
| 140 suggestionHighlightMarkerPtr->endOffset() + 1); |
| 141 const EphemeralRange& nextCharacterEphemeralRange = |
| 142 nextCharacterRange.createRange(*rootEditableElement); |
| 143 if (!nextCharacterEphemeralRange.isNull()) { |
| 144 String nextCharacterStr = plainText( |
| 145 nextCharacterEphemeralRange, |
| 146 TextIteratorBehavior::Builder().setEmitsSpaceForNbsp(true).build()); |
| 147 |
| 148 if (WTF::isASCIISpace(nextCharacterStr[0])) { |
| 149 if (suggestionHighlightMarkerPtr->startOffset() == 0) { |
| 150 deleteNextChar = true; |
| 151 } else { |
| 152 const PlainTextRange prevCharacterRange( |
| 153 suggestionHighlightMarkerPtr->startOffset() - 1, |
| 154 suggestionHighlightMarkerPtr->startOffset()); |
| 155 const EphemeralRange prevCharacterEphemeralRange = |
| 156 prevCharacterRange.createRange(*rootEditableElement); |
| 157 if (!prevCharacterEphemeralRange.isNull()) { |
| 158 String prevCharacterStr = plainText(prevCharacterEphemeralRange, |
| 159 TextIteratorBehavior::Builder() |
| 160 .setEmitsSpaceForNbsp(true) |
| 161 .build()); |
| 162 if (WTF::isASCIISpace(prevCharacterStr[0])) { |
| 163 deleteNextChar = true; |
| 164 } |
| 165 } |
| 166 } |
| 167 } |
| 168 } |
| 169 |
| 170 const EphemeralRange highlightRange = |
| 171 PlainTextRange(suggestionHighlightMarkerPtr->startOffset(), |
| 172 suggestionHighlightMarkerPtr->endOffset() + deleteNextChar) |
| 173 .createRange(*rootEditableElement); |
| 174 |
| 175 frame().selection().setSelection( |
| 176 SelectionInDOMTree::Builder().setBaseAndExtent(highlightRange).build(), |
| 177 0); |
| 178 // Don't want to send JavaScript composition events here |
| 179 frame().editor().replaceSelectionWithText( |
| 180 "", false, false, InputEvent::InputType::InsertReplacementText); |
| 181 |
| 182 suggestionMenuClosed(); |
| 183 } |
| 184 |
| 185 void TextSuggestionController::suggestionMenuClosed() { |
| 186 document().markers().removeMarkers(DocumentMarker::SuggestionHighlight); |
| 187 frame().selection().setCaretVisible(true); |
| 188 m_suggestionMenuIsOpen = false; |
| 189 } |
| 190 |
| 191 void TextSuggestionController::handlePotentialTextSuggestionTap() { |
| 192 Vector<blink::TextSuggestionInfo> suggestion_infos = |
| 193 getTextSuggestionInfosUnderCaretAndAddHighlight(); |
| 194 if (suggestion_infos.size() == 0) |
| 195 return; |
| 196 |
| 197 // The composition is now on the suggestion range highlight |
| 198 // TODO: how to do this? |
| 199 // UpdateCompositionInfo(false /* not an immediate request */); |
| 200 prepareForTextSuggestionMenuToBeShown(); |
| 201 |
| 202 if (!text_suggestion_host_) { |
| 203 frame().interfaceProvider()->getInterface( |
| 204 mojo::MakeRequest(&text_suggestion_host_)); |
| 205 } |
| 206 |
| 207 Vector<mojom::blink::TextSuggestionInfoPtr> suggestion_info_ptrs; |
| 208 for (const blink::TextSuggestionInfo& info : suggestion_infos) { |
| 209 mojom::blink::TextSuggestionInfoPtr info_ptr( |
| 210 mojom::blink::TextSuggestionInfo::New()); |
| 211 info_ptr->suggestionID = info.suggestionID; |
| 212 info_ptr->suggestionIndex = info.suggestionIndex; |
| 213 info_ptr->prefix = info.prefix; |
| 214 info_ptr->suggestion = info.suggestion; |
| 215 info_ptr->suffix = info.suffix; |
| 216 |
| 217 suggestion_info_ptrs.push_back(std::move(info_ptr)); |
| 218 } |
| 219 |
| 220 text_suggestion_host_->ShowTextSuggestionMenu( |
| 221 std::move(suggestion_info_ptrs)); |
| 222 } |
| 223 |
| 224 void TextSuggestionController::prepareForTextSuggestionMenuToBeShown() { |
| 225 m_suggestionMenuIsOpen = true; |
| 226 frame().selection().setCaretVisible(false); |
| 227 } |
| 228 |
| 229 void TextSuggestionController::removeSuggestionMarkersAffectedByEditing( |
| 230 bool doNotRemoveIfSelectionAtWordBoundary) { |
| 231 // Don't remove suggestion markers when we're doing a replace operation |
| 232 if (suggestionMenuIsOpen()) |
| 233 return; |
| 234 |
| 235 document().markers().removeMarkersForWordsAffectedByEditing( |
| 236 DocumentMarker::Suggestion, doNotRemoveIfSelectionAtWordBoundary); |
| 237 } |
| 238 |
| 239 bool TextSuggestionController::isAvailable() const { |
| 240 return frame().document(); |
| 241 } |
| 242 |
| 243 Document& TextSuggestionController::document() const { |
| 244 DCHECK(isAvailable()); |
| 245 return *frame().document(); |
| 246 } |
| 247 |
| 248 Vector<blink::TextSuggestionInfo> |
| 249 TextSuggestionController::getTextSuggestionInfosUnderCaretAndAddHighlight() |
| 250 const { |
| 251 Element* rootEditableElement = |
| 252 frame() |
| 253 .selection() |
| 254 .computeVisibleSelectionInDOMTreeDeprecated() |
| 255 .rootEditableElement(); |
| 256 if (!rootEditableElement) |
| 257 return Vector<blink::TextSuggestionInfo>(); |
| 258 |
| 259 DocumentMarkerVector suggestionMarkers = |
| 260 rootEditableElement->document().markers().markersInRangeInclusive( |
| 261 firstEphemeralRangeOf( |
| 262 m_frame->selection() |
| 263 .computeVisibleSelectionInDOMTreeDeprecated()), |
| 264 DocumentMarker::Suggestion); |
| 265 |
| 266 Vector<TextSuggestionList> suggestionSpans; |
| 267 for (const Member<DocumentMarker>& marker : suggestionMarkers) { |
| 268 // ignore ranges that have been collapsed as a result of editing |
| 269 // operations |
| 270 if (marker->endOffset() == marker->startOffset()) |
| 271 continue; |
| 272 |
| 273 const SuggestionMarker& suggestionMarker = toSuggestionMarker(*marker); |
| 274 |
| 275 TextSuggestionList suggestionList; |
| 276 suggestionList.suggestionID = suggestionMarker.suggestionID(); |
| 277 suggestionList.start = suggestionMarker.startOffset(); |
| 278 suggestionList.end = suggestionMarker.endOffset(); |
| 279 suggestionList.suggestions = suggestionMarker.suggestions(); |
| 280 suggestionSpans.push_back(suggestionList); |
| 281 } |
| 282 std::sort(suggestionSpans.begin(), suggestionSpans.end()); |
| 283 |
| 284 Vector<TextSuggestionInfo> suggestionInfos; |
| 285 |
| 286 for (const TextSuggestionList& suggestionList : suggestionSpans) { |
| 287 if (suggestionInfos.size() == kMaxNumberSuggestions) |
| 288 break; |
| 289 |
| 290 for (size_t suggestionIndex = 0; |
| 291 suggestionIndex < suggestionList.suggestions.size(); |
| 292 suggestionIndex++) { |
| 293 const String& suggestion = suggestionList.suggestions[suggestionIndex]; |
| 294 bool isDupe = false; |
| 295 for (size_t i = 0; i < suggestionInfos.size(); i++) { |
| 296 const TextSuggestionInfo& otherSuggestionInfo = suggestionInfos[i]; |
| 297 if (otherSuggestionInfo.suggestion == suggestion) { |
| 298 if (suggestionList.start == otherSuggestionInfo.spanStart && |
| 299 suggestionList.end == otherSuggestionInfo.spanEnd) { |
| 300 isDupe = true; |
| 301 break; |
| 302 } |
| 303 } |
| 304 } |
| 305 |
| 306 if (isDupe) |
| 307 continue; |
| 308 |
| 309 TextSuggestionInfo suggestionInfo; |
| 310 suggestionInfo.suggestionID = suggestionList.suggestionID; |
| 311 suggestionInfo.suggestionStart = 0; |
| 312 suggestionInfo.suggestionEnd = suggestion.length(); |
| 313 suggestionInfo.spanStart = suggestionList.start; |
| 314 suggestionInfo.spanEnd = suggestionList.end; |
| 315 suggestionInfo.suggestionIndex = suggestionIndex; |
| 316 suggestionInfo.suggestion = suggestion; |
| 317 suggestionInfos.push_back(suggestionInfo); |
| 318 if (suggestionInfos.size() == kMaxNumberSuggestions) |
| 319 break; |
| 320 } |
| 321 } |
| 322 |
| 323 if (suggestionInfos.size() == 0) |
| 324 return Vector<blink::TextSuggestionInfo>(); |
| 325 |
| 326 int spanUnionStart = suggestionInfos[0].spanStart; |
| 327 int spanUnionEnd = suggestionInfos[0].spanEnd; |
| 328 |
| 329 for (size_t i = 1; i < suggestionInfos.size(); i++) { |
| 330 spanUnionStart = std::min(spanUnionStart, suggestionInfos[i].spanStart); |
| 331 spanUnionEnd = std::max(spanUnionEnd, suggestionInfos[i].spanEnd); |
| 332 } |
| 333 |
| 334 for (TextSuggestionInfo& info : suggestionInfos) { |
| 335 const EphemeralRange& prefixRange = |
| 336 PlainTextRange(spanUnionStart, info.spanStart) |
| 337 .createRange(*rootEditableElement); |
| 338 String prefix = |
| 339 plainText(prefixRange, TextIteratorBehavior::Builder().build()); |
| 340 |
| 341 const EphemeralRange& suffixRange = |
| 342 PlainTextRange(info.spanEnd, spanUnionEnd) |
| 343 .createRange(*rootEditableElement); |
| 344 String suffix = |
| 345 plainText(suffixRange, TextIteratorBehavior::Builder().build()); |
| 346 |
| 347 info.prefix = prefix.utf8().data(); |
| 348 info.suffix = suffix.utf8().data(); |
| 349 } |
| 350 |
| 351 Color highlightColor; |
| 352 const SuggestionMarker& firstSuggestionMarker = *toSuggestionMarker(suggestion
Markers[0]); |
| 353 if (firstSuggestionMarker.underlineColor() != 0) { |
| 354 highlightColor = firstSuggestionMarker.underlineColor().combineWithAlpha( |
| 355 kSuggestionUnderlineAlphaMultiplier); |
| 356 } else { |
| 357 highlightColor = LayoutTheme::tapHighlightColor(); |
| 358 } |
| 359 |
| 360 EphemeralRange backgroundHighlightRange = |
| 361 PlainTextRange(spanUnionStart, spanUnionEnd) |
| 362 .createRange(*rootEditableElement); |
| 363 document().markers().addSuggestionHighlightMarker( |
| 364 backgroundHighlightRange, |
| 365 Color::black, false, |
| 366 highlightColor); |
| 367 |
| 368 return suggestionInfos; |
| 369 } |
| 370 |
| 371 DEFINE_TRACE(TextSuggestionController) { |
| 372 visitor->trace(m_frame); |
| 373 } |
| 374 |
| 375 } // namespace blink |
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