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C++ tooltip: Arrow diagrams to show inheritance.

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This commit is contained in:
Leandro Melo
2010-07-20 12:35:08 +02:00
parent b25a4a6349
commit 2d2ea660b0
6 changed files with 205 additions and 35 deletions
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220
src/plugins/cppeditor/cpphoverhandler.cpp
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@@ -40,7 +40,6 @@
#include <texteditor/basetexteditor.h>
#include <texteditor/displaysettings.h>
#include <debugger/debuggerconstants.h>
#include <utils/htmldocextractor.h>
#include <FullySpecifiedType.h>
#include <Scope.h>
@@ -54,6 +53,8 @@
#include <QtCore/QDir>
#include <QtCore/QFileInfo>
#include <QtCore/QtAlgorithms>
#include <QtCore/QStringBuilder>
#include <QtGui/QToolTip>
#include <QtGui/QTextCursor>
@@ -81,6 +82,42 @@ namespace {
ch = doc->characterAt(tc->position());
}
}
void buildClassHierarchyHelper(Symbol *symbol,
const LookupContext &context,
const Overview &overview,
QList<QStringList> *hierarchy) {
if (ClassOrNamespace *classSymbol = context.lookupType(symbol)) {
const QList<ClassOrNamespace *> &bases = classSymbol->usings();
foreach (ClassOrNamespace *baseClass, bases) {
const QList<Symbol *> &symbols = baseClass->symbols();
foreach (Symbol *baseSymbol, symbols) {
if (baseSymbol->isClass()) {
hierarchy->back().append(overview.prettyName(baseSymbol->name()));
buildClassHierarchyHelper(baseSymbol, context, overview, hierarchy);
hierarchy->append(hierarchy->back());
hierarchy->back().removeLast();
}
}
}
}
}
void buildClassHierarchy(Symbol *symbol,
const LookupContext &context,
const Overview &overview,
QList<QStringList> *hierarchy) {
if (hierarchy->isEmpty())
hierarchy->append(QStringList());
buildClassHierarchyHelper(symbol, context, overview, hierarchy);
hierarchy->removeLast();
}
struct ClassHierarchyComp
{
bool operator()(const QStringList &a, const QStringList &b)
{ return a.size() < b.size(); }
};
}
CppHoverHandler::CppHoverHandler(QObject *parent)
@@ -127,7 +164,8 @@ void CppHoverHandler::updateContextHelpId(TextEditor::ITextEditor *editor, int p
void CppHoverHandler::showToolTip(TextEditor::ITextEditor *editor, const QPoint &point, int pos)
{
if (!editor)
TextEditor::BaseTextEditor *baseEditor = baseTextEditor(editor);
if (!baseEditor)
return;
editor->setContextHelpId(QString());
@@ -143,24 +181,13 @@ void CppHoverHandler::showToolTip(TextEditor::ITextEditor *editor, const QPoint
if (m_toolTip.isEmpty()) {
QToolTip::hideText();
} else {
if (m_matchingHelpCandidate != -1) {
QString contents;
TextEditor::BaseTextEditor *baseEditor = baseTextEditor(editor);
if (baseEditor && baseEditor->displaySettings().m_integrateDocsIntoTooltips)
contents = getDocContents();
if (!contents.isEmpty()) {
m_toolTip = contents;
} else {
m_toolTip = Qt::escape(m_toolTip);
m_toolTip.prepend(QLatin1String("<nobr>"));
m_toolTip.append(QLatin1String("</nobr>"));
}
if (!m_classHierarchy.isEmpty())
generateDiagramTooltip(baseEditor->displaySettings().m_integrateDocsIntoTooltips);
else
generateNormalTooltip(baseEditor->displaySettings().m_integrateDocsIntoTooltips);
m_toolTip = QString(QLatin1String("<table><tr>"
"<td valign=middle>%1</td>"
"<td><img src=\":/cppeditor/images/f1.png\"></td>"
"</tr></table>")).arg(m_toolTip);
}
if (m_matchingHelpCandidate != -1)
addF1ToTooltip();
const QPoint pnt = point - QPoint(0,
#ifdef Q_WS_WIN
@@ -220,7 +247,7 @@ void CppHoverHandler::identifyMatch(TextEditor::ITextEditor *editor, int pos)
return;
const LookupItem &lookupItem = lookupItems.first(); // ### TODO: select the best candidate.
handleLookupItemMatch(lookupItem, !extraSelectionTooltip);
handleLookupItemMatch(lookupItem, typeOfExpression.context(), !extraSelectionTooltip);
}
evaluateHelpCandidates();
@@ -244,7 +271,7 @@ bool CppHoverHandler::matchIncludeFile(const CPlusPlus::Document::Ptr &document,
if (includeFile.line() == line) {
m_toolTip = QDir::toNativeSeparators(includeFile.fileName());
const QString &fileName = QFileInfo(includeFile.fileName()).fileName();
m_helpCandidates.append(HelpCandidate(fileName, fileName, HelpCandidate::Include));
m_helpCandidates.append(HelpCandidate(fileName, fileName, HelpCandidate::Brief));
return true;
}
}
@@ -267,7 +294,9 @@ bool CppHoverHandler::matchMacroInUse(const CPlusPlus::Document::Ptr &document,
return false;
}
void CppHoverHandler::handleLookupItemMatch(const LookupItem &lookupItem, const bool assignTooltip)
void CppHoverHandler::handleLookupItemMatch(const LookupItem &lookupItem,
const LookupContext &context,
const bool assignTooltip)
{
Symbol *matchingDeclaration = lookupItem.declaration();
FullySpecifiedType matchingType = lookupItem.type();
@@ -286,6 +315,11 @@ void CppHoverHandler::handleLookupItemMatch(const LookupItem &lookupItem, const
matchingDeclaration->enclosingSymbol()->isEnum()) {
qualifiedName.append(overview.prettyName(
LookupContext::fullyQualifiedName(matchingDeclaration)));
if (matchingDeclaration->isClass() ||
matchingDeclaration->isForwardClassDeclaration()) {
buildClassHierarchy(matchingDeclaration, context, overview, &m_classHierarchy);
}
} else {
qualifiedName.append(overview.prettyName(matchingDeclaration->name()));
}
@@ -310,15 +344,15 @@ void CppHoverHandler::handleLookupItemMatch(const LookupItem &lookupItem, const
helpCategory = HelpCandidate::Enum;
} else if (matchingDeclaration->isTypedef()) {
helpCategory = HelpCandidate::Typedef;
} else if (matchingDeclaration->isStatic() && !matchingDeclaration->isFunction()) {
} else if (matchingDeclaration->isStatic() &&
!matchingDeclaration->type()->isFunctionType()) {
helpCategory = HelpCandidate::Var;
} else {
helpCategory = HelpCandidate::Function;
}
// Help identifiers are simply the name with no signature, arguments or return type.
// They might or might not include a qualification. This is why two candidates are
// created.
// They might or might not include a qualification. This is why two candidates are created.
overview.setShowArgumentNames(false);
overview.setShowReturnTypes(false);
overview.setShowFunctionSignatures(false);
@@ -350,12 +384,16 @@ bool CppHoverHandler::helpIdExists(const QString &helpId) const
return false;
}
QString CppHoverHandler::getDocContents()
QString CppHoverHandler::getDocContents() const
{
Q_ASSERT(m_matchingHelpCandidate >= 0);
return getDocContents(m_helpCandidates.at(m_matchingHelpCandidate));
}
QString CppHoverHandler::getDocContents(const HelpCandidate &help) const
{
QString contents;
const HelpCandidate &help = m_helpCandidates.at(m_matchingHelpCandidate);
QMap<QString, QUrl> helpLinks =
Core::HelpManager::instance()->linksForIdentifier(help.m_helpId);
foreach (const QUrl &url, helpLinks) {
@@ -363,15 +401,14 @@ QString CppHoverHandler::getDocContents()
const QString &name = removeQualificationIfAny(help.m_helpId);
const QByteArray &html = Core::HelpManager::instance()->fileData(url);
switch (help.m_category) {
case HelpCandidate::Include:
case HelpCandidate::Brief:
contents = m_htmlDocExtractor.getClassOrNamespaceBrief(html, name);
break;
case HelpCandidate::ClassOrNamespace:
contents = m_htmlDocExtractor.getClassOrNamespaceDescription(html, name);
break;
case HelpCandidate::Function:
contents =
m_htmlDocExtractor.getFunctionDescription(html, help.m_markId, name);
contents = m_htmlDocExtractor.getFunctionDescription(html, help.m_markId, name);
break;
case HelpCandidate::Enum:
contents = m_htmlDocExtractor.getEnumDescription(html, name);
@@ -395,14 +432,137 @@ QString CppHoverHandler::getDocContents()
return contents;
}
void CppHoverHandler::generateDiagramTooltip(const bool integrateDocs)
{
QString clazz = m_toolTip;
qSort(m_classHierarchy.begin(), m_classHierarchy.end(), ClassHierarchyComp());
QStringList directBaseClasses;
foreach (const QStringList &hierarchy, m_classHierarchy) {
if (hierarchy.size() > 1)
break;
directBaseClasses.append(hierarchy.at(0));
}
QString diagram(QLatin1String("<table>"));
for (int i = 0; i < directBaseClasses.size(); ++i) {
if (i == 0) {
diagram.append(QString(
"<tr><td>%1</td><td>"
"<img src=\":/cppeditor/images/rightarrow.png\"></td>"
"<td>%2</td></tr>").arg(m_toolTip).arg(directBaseClasses.at(i)));
} else {
diagram.append(QString(
"<tr><td></td><td>"
"<img src=\":/cppeditor/images/larrow.png\"></td>"
"<td>%1</td></tr>").arg(directBaseClasses.at(i)));
}
}
diagram.append(QLatin1String("</table>"));
m_toolTip = diagram;
if (integrateDocs) {
if (m_matchingHelpCandidate != -1) {
m_toolTip.append(getDocContents());
} else {
// Look for documented base classes. Diagram the nearest one or the nearest ones (in
// the case there are many at the same level).
int helpLevel = 0;
QList<int> baseClassesWithHelp;
for (int i = 0; i < m_classHierarchy.size(); ++i) {
const QStringList &hierarchy = m_classHierarchy.at(i);
if (helpLevel != 0 && hierarchy.size() != helpLevel)
break;
const QString &name = hierarchy.last();
if (helpIdExists(name)) {
baseClassesWithHelp.append(i);
if (helpLevel == 0)
helpLevel = hierarchy.size();
}
}
if (!baseClassesWithHelp.isEmpty()) {
// Choose the first one as the help match.
QString base = m_classHierarchy.at(baseClassesWithHelp.at(0)).last();
HelpCandidate help(base, base, HelpCandidate::ClassOrNamespace);
m_helpCandidates.append(help);
m_matchingHelpCandidate = m_helpCandidates.size() - 1;
if (baseClassesWithHelp.size() == 1 && helpLevel == 1) {
m_toolTip.append(getDocContents(help));
} else {
foreach (int hierarchyIndex, baseClassesWithHelp) {
m_toolTip.append(QLatin1String("<p>"));
const QStringList &hierarchy = m_classHierarchy.at(hierarchyIndex);
Q_ASSERT(helpLevel <= hierarchy.size());
// Following contents are inside tables so they are on the exact same
// alignment as the top level diagram.
diagram = QString(QLatin1String("<table><tr><td>%1</td>")).arg(clazz);
for (int i = 0; i < helpLevel; ++i) {
diagram.append(
QLatin1String("<td><img src=\":/cppeditor/images/rightarrow.png\">"
"</td><td>") %
hierarchy.at(i) %
QLatin1String("</td>"));
}
diagram.append(QLatin1String("</tr></table>"));
base = hierarchy.at(helpLevel - 1);
QString contents =
getDocContents(HelpCandidate(base, base, HelpCandidate::Brief));
if (!contents.isEmpty()) {
m_toolTip.append(diagram % QLatin1String("<table><tr><td>") %
contents % QLatin1String("</td></tr></table>"));
}
m_toolTip.append(QLatin1String("</p>"));
}
}
}
}
}
}
void CppHoverHandler::generateNormalTooltip(const bool integrateDocs)
{
if (m_matchingHelpCandidate != -1) {
QString contents;
if (integrateDocs)
contents = getDocContents();
if (!contents.isEmpty()) {
HelpCandidate::Category cat = m_helpCandidates.at(m_matchingHelpCandidate).m_category;
if (cat == HelpCandidate::ClassOrNamespace)
m_toolTip.append(contents);
else
m_toolTip = contents;
} else {
m_toolTip = Qt::escape(m_toolTip);
m_toolTip.prepend(QLatin1String("<nobr>"));
m_toolTip.append(QLatin1String("</nobr>"));
}
}
}
void CppHoverHandler::addF1ToTooltip()
{
m_toolTip = QString(QLatin1String("<table><tr><td valign=middle>%1</td><td>&nbsp;&nbsp;"
"<img src=\":/cppeditor/images/f1.png\"></td>"
"</tr></table>")).arg(m_toolTip);
}
void CppHoverHandler::resetMatchings()
{
m_matchingHelpCandidate = -1;
m_helpCandidates.clear();
m_toolTip.clear();
m_classHierarchy.clear();
}
TextEditor::BaseTextEditor *CppHoverHandler::baseTextEditor(TextEditor::ITextEditor *editor)
{
if (!editor)
return 0;
return qobject_cast<TextEditor::BaseTextEditor *>(editor->widget());
}