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
|
// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include "cppuseselectionsupdater.h"
#include "cppeditordocument.h"
#include "cppeditorwidget.h"
#include "cppmodelmanager.h"
#include <extensionsystem/pluginmanager.h>
#include <utils/futuresynchronizer.h>
#include <utils/qtcassert.h>
#include <utils/textutils.h>
#include <QTextBlock>
#include <QTextCursor>
enum { updateUseSelectionsInternalInMs = 500 };
namespace CppEditor {
namespace Internal {
CppUseSelectionsUpdater::CppUseSelectionsUpdater(CppEditorWidget *editorWidget)
: m_editorWidget(editorWidget)
{
m_timer.setSingleShot(true);
m_timer.setInterval(updateUseSelectionsInternalInMs);
connect(&m_timer, &QTimer::timeout, this, [this] { update(); });
}
CppUseSelectionsUpdater::~CppUseSelectionsUpdater()
{
if (m_runnerWatcher)
m_runnerWatcher->cancel();
}
void CppUseSelectionsUpdater::scheduleUpdate()
{
m_timer.start();
}
void CppUseSelectionsUpdater::abortSchedule()
{
m_timer.stop();
}
CppUseSelectionsUpdater::RunnerInfo CppUseSelectionsUpdater::update(CallType callType)
{
auto *cppEditorWidget = qobject_cast<CppEditorWidget *>(m_editorWidget);
QTC_ASSERT(cppEditorWidget, return RunnerInfo::FailedToStart);
auto *cppEditorDocument = qobject_cast<CppEditorDocument *>(cppEditorWidget->textDocument());
QTC_ASSERT(cppEditorDocument, return RunnerInfo::FailedToStart);
m_updateSelections = !CppModelManager::usesClangd(cppEditorDocument)
&& !m_editorWidget->isRenaming();
CursorInfoParams params;
params.semanticInfo = cppEditorWidget->semanticInfo();
params.textCursor = Utils::Text::wordStartCursor(cppEditorWidget->textCursor());
if (callType == CallType::Asynchronous) {
if (isSameIdentifierAsBefore(params.textCursor))
return RunnerInfo::AlreadyUpToDate;
if (m_runnerWatcher)
m_runnerWatcher->cancel();
m_runnerWatcher.reset(new QFutureWatcher<CursorInfo>);
connect(m_runnerWatcher.get(), &QFutureWatcherBase::finished,
this, &CppUseSelectionsUpdater::onFindUsesFinished);
m_runnerRevision = m_editorWidget->document()->revision();
m_runnerWordStartPosition = params.textCursor.position();
m_runnerWatcher->setFuture(cppEditorDocument->cursorInfo(params));
ExtensionSystem::PluginManager::futureSynchronizer()->addFuture(m_runnerWatcher->future());
return RunnerInfo::Started;
} else { // synchronous case
abortSchedule();
const int startRevision = cppEditorDocument->document()->revision();
QFuture<CursorInfo> future = cppEditorDocument->cursorInfo(params);
if (future.isCanceled())
return RunnerInfo::Invalid;
// QFuture::waitForFinished seems to block completely, not even
// allowing to process events from QLocalSocket.
while (!future.isFinished()) {
if (future.isCanceled())
return RunnerInfo::Invalid;
QTC_ASSERT(startRevision == cppEditorDocument->document()->revision(),
return RunnerInfo::Invalid);
QCoreApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
}
processResults(future.result());
return RunnerInfo::Invalid;
}
}
bool CppUseSelectionsUpdater::isSameIdentifierAsBefore(const QTextCursor &cursorAtWordStart) const
{
return m_runnerRevision != -1
&& m_runnerRevision == m_editorWidget->document()->revision()
&& m_runnerWordStartPosition == cursorAtWordStart.position();
}
void CppUseSelectionsUpdater::processResults(const CursorInfo &result)
{
if (m_updateSelections) {
ExtraSelections localVariableSelections;
if (!result.useRanges.isEmpty() || !currentUseSelections().isEmpty()) {
ExtraSelections selections = updateUseSelections(result.useRanges);
if (result.areUseRangesForLocalVariable)
localVariableSelections = selections;
}
updateUnusedSelections(result.unusedVariablesRanges);
emit selectionsForVariableUnderCursorUpdated(localVariableSelections);
}
emit finished(result.localUses, true);
}
void CppUseSelectionsUpdater::onFindUsesFinished()
{
QTC_ASSERT(m_runnerWatcher,
emit finished(SemanticInfo::LocalUseMap(), false); return);
if (m_runnerWatcher->isCanceled()) {
emit finished(SemanticInfo::LocalUseMap(), false);
return;
}
if (m_runnerRevision != m_editorWidget->document()->revision()) {
emit finished(SemanticInfo::LocalUseMap(), false);
return;
}
if (m_runnerWordStartPosition
!= Utils::Text::wordStartCursor(m_editorWidget->textCursor()).position()) {
emit finished(SemanticInfo::LocalUseMap(), false);
return;
}
processResults(m_runnerWatcher->result());
m_runnerWatcher.release()->deleteLater();
}
CppUseSelectionsUpdater::ExtraSelections
CppUseSelectionsUpdater::toExtraSelections(const CursorInfo::Ranges &ranges,
TextEditor::TextStyle style)
{
CppUseSelectionsUpdater::ExtraSelections selections;
selections.reserve(ranges.size());
for (const CursorInfo::Range &range : ranges) {
QTextDocument *document = m_editorWidget->document();
const int position
= document->findBlockByNumber(static_cast<int>(range.line) - 1).position()
+ static_cast<int>(range.column) - 1;
const int anchor = position + static_cast<int>(range.length);
QTextEdit::ExtraSelection sel;
sel.format = m_editorWidget->textDocument()->fontSettings().toTextCharFormat(style);
sel.cursor = QTextCursor(document);
sel.cursor.setPosition(anchor);
sel.cursor.setPosition(position, QTextCursor::KeepAnchor);
selections.append(sel);
}
return selections;
}
CppUseSelectionsUpdater::ExtraSelections
CppUseSelectionsUpdater::currentUseSelections() const
{
return m_editorWidget->extraSelections(TextEditor::TextEditorWidget::CodeSemanticsSelection);
}
CppUseSelectionsUpdater::ExtraSelections
CppUseSelectionsUpdater::updateUseSelections(const CursorInfo::Ranges &ranges)
{
const ExtraSelections selections = toExtraSelections(ranges, TextEditor::C_OCCURRENCES);
m_editorWidget->setExtraSelections(TextEditor::TextEditorWidget::CodeSemanticsSelection,
selections);
return selections;
}
void CppUseSelectionsUpdater::updateUnusedSelections(const CursorInfo::Ranges &ranges)
{
const ExtraSelections selections = toExtraSelections(ranges, TextEditor::C_OCCURRENCES_UNUSED);
m_editorWidget->setExtraSelections(TextEditor::TextEditorWidget::UnusedSymbolSelection,
selections);
}
} // namespace Internal
} // namespace CppEditor
|
