Clang: Add ClangPreprocessorAssistProposalItem

Change-Id: Ifb27b9a21b9a2fe9a04496bbb70fa3fa07d1f89c
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@theqtcompany.com>

8 files changed, 286 insertions, 49 deletions

diff --git a/src/plugins/clangcodemodel/clangassistproposalitem.cpp b/src/plugins/clangcodemodel/clangassistproposalitem.cpp
index e8a8e97979..57b38c8e9a 100644
--- a/src/plugins/clangcodemodel/clangassistproposalitem.cpp
+++ b/src/plugins/clangcodemodel/clangassistproposalitem.cpp
@@ -42,21 +42,21 @@ using namespace ClangBackEnd;
 namespace ClangCodeModel {
 namespace Internal {
 
-bool ClangAssistProposalItem::prematurelyApplies(const QChar &typedChar) const
+bool ClangAssistProposalItem::prematurelyApplies(const QChar &typedCharacter) const
 {
     bool applies = false;
 
     if (m_completionOperator == T_SIGNAL || m_completionOperator == T_SLOT)
-        applies = QString::fromLatin1("(,").contains(typedChar);
+        applies = QString::fromLatin1("(,").contains(typedCharacter);
     else if (m_completionOperator == T_STRING_LITERAL || m_completionOperator == T_ANGLE_STRING_LITERAL)
-        applies = (typedChar == QLatin1Char('/')) && text().endsWith(QLatin1Char('/'));
+        applies = (typedCharacter == QLatin1Char('/')) && text().endsWith(QLatin1Char('/'));
     else if (codeCompletion().completionKind() == CodeCompletion::ObjCMessageCompletionKind)
-        applies = QString::fromLatin1(";.,").contains(typedChar);
+        applies = QString::fromLatin1(";.,").contains(typedCharacter);
     else
-        applies = QString::fromLatin1(";.,:(").contains(typedChar);
+        applies = QString::fromLatin1(";.,:(").contains(typedCharacter);
 
     if (applies)
-        m_typedChar = typedChar;
+        m_typedCharacter = typedCharacter;
 
     return applies;
 }
@@ -87,23 +87,16 @@ void ClangAssistProposalItem::apply(TextEditor::TextEditorWidget *editorWidget,
     const CodeCompletion ccr = codeCompletion();
 
     QString textToBeInserted = text();
-    QString extraChars;
+    QString extraCharacters;
     int extraLength = 0;
     int cursorOffset = 0;
 
     bool autoParenthesesEnabled = true;
     if (m_completionOperator == T_SIGNAL || m_completionOperator == T_SLOT) {
-        extraChars += QLatin1Char(')');
-        if (m_typedChar == QLatin1Char('(')) // Eat the opening parenthesis
-            m_typedChar = QChar();
-    } else if (m_completionOperator == T_STRING_LITERAL || m_completionOperator == T_ANGLE_STRING_LITERAL) {
-        if (!textToBeInserted.endsWith(QLatin1Char('/'))) {
-            extraChars += QLatin1Char((m_completionOperator == T_ANGLE_STRING_LITERAL) ? '>' : '"');
-        } else {
-            if (m_typedChar == QLatin1Char('/')) // Eat the slash
-                m_typedChar = QChar();
-        }
-    } else if (ccr.completionKind() == CodeCompletion::KeywordCompletionKind) {
+        extraCharacters += QLatin1Char(')');
+        if (m_typedCharacter == QLatin1Char('(')) // Eat the opening parenthesis
+            m_typedCharacter = QChar();
+    } else  if (ccr.completionKind() == CodeCompletion::KeywordCompletionKind) {
         CompletionChunksToTextConverter converter;
         converter.setupForKeywords();
 
@@ -131,42 +124,42 @@ void ClangAssistProposalItem::apply(TextEditor::TextEditorWidget *editorWidget,
             // When the user typed the opening parenthesis, he'll likely also type the closing one,
             // in which case it would be annoying if we put the cursor after the already automatically
             // inserted closing parenthesis.
-            const bool skipClosingParenthesis = m_typedChar != QLatin1Char('(');
+            const bool skipClosingParenthesis = m_typedCharacter != QLatin1Char('(');
 
             if (completionSettings.m_spaceAfterFunctionName)
-                extraChars += QLatin1Char(' ');
-            extraChars += QLatin1Char('(');
-            if (m_typedChar == QLatin1Char('('))
-                m_typedChar = QChar();
+                extraCharacters += QLatin1Char(' ');
+            extraCharacters += QLatin1Char('(');
+            if (m_typedCharacter == QLatin1Char('('))
+                m_typedCharacter = QChar();
 
             // If the function doesn't return anything, automatically place the semicolon,
             // unless we're doing a scope completion (then it might be function definition).
             const QChar characterAtCursor = editorWidget->characterAt(editorWidget->position());
-            bool endWithSemicolon = m_typedChar == QLatin1Char(';')/*
+            bool endWithSemicolon = m_typedCharacter == QLatin1Char(';')/*
                                             || (function->returnType()->isVoidType() && m_completionOperator != T_COLON_COLON)*/; //###
-            const QChar semicolon = m_typedChar.isNull() ? QLatin1Char(';') : m_typedChar;
+            const QChar semicolon = m_typedCharacter.isNull() ? QLatin1Char(';') : m_typedCharacter;
 
             if (endWithSemicolon && characterAtCursor == semicolon) {
                 endWithSemicolon = false;
-                m_typedChar = QChar();
+                m_typedCharacter = QChar();
             }
 
             // If the function takes no arguments, automatically place the closing parenthesis
             if (!isOverloaded() && !ccr.hasParameters() && skipClosingParenthesis) {
-                extraChars += QLatin1Char(')');
+                extraCharacters += QLatin1Char(')');
                 if (endWithSemicolon) {
-                    extraChars += semicolon;
-                    m_typedChar = QChar();
+                    extraCharacters += semicolon;
+                    m_typedCharacter = QChar();
                 }
             } else if (autoParenthesesEnabled) {
                 const QChar lookAhead = editorWidget->characterAt(editorWidget->position() + 1);
                 if (MatchingText::shouldInsertMatchingText(lookAhead)) {
-                    extraChars += QLatin1Char(')');
+                    extraCharacters += QLatin1Char(')');
                     --cursorOffset;
                     if (endWithSemicolon) {
-                        extraChars += semicolon;
+                        extraCharacters += semicolon;
                         --cursorOffset;
-                        m_typedChar = QChar();
+                        m_typedCharacter = QChar();
                     }
                 }
             }
@@ -187,8 +180,8 @@ void ClangAssistProposalItem::apply(TextEditor::TextEditorWidget *editorWidget,
     }
 
     // Append an unhandled typed character, adjusting cursor offset when it had been adjusted before
-    if (!m_typedChar.isNull()) {
-        extraChars += m_typedChar;
+    if (!m_typedCharacter.isNull()) {
+        extraCharacters += m_typedCharacter;
         if (cursorOffset != 0)
             --cursorOffset;
     }
@@ -205,8 +198,8 @@ void ClangAssistProposalItem::apply(TextEditor::TextEditorWidget *editorWidget,
                 break;
         }
     }
-    for (int i = 0; i < extraChars.length(); ++i) {
-        const QChar a = extraChars.at(i);
+    for (int i = 0; i < extraCharacters.length(); ++i) {
+        const QChar a = extraCharacters.at(i);
         const QChar b = editorWidget->characterAt(editorWidget->position() + i + existLength);
         if (a == b)
             ++extraLength;
@@ -214,7 +207,7 @@ void ClangAssistProposalItem::apply(TextEditor::TextEditorWidget *editorWidget,
             break;
     }
 
-    textToBeInserted += extraChars;
+    textToBeInserted += extraCharacters;
 
     // Insert the remainder of the name
     const int length = editorWidget->position() - basePosition + existLength + extraLength;
diff --git a/src/plugins/clangcodemodel/clangassistproposalitem.h b/src/plugins/clangcodemodel/clangassistproposalitem.h
index 68d74ea6c2..776d7e196a 100644
--- a/src/plugins/clangcodemodel/clangassistproposalitem.h
+++ b/src/plugins/clangcodemodel/clangassistproposalitem.h
@@ -39,9 +39,7 @@ class ClangAssistProposalItem final : public TextEditor::AssistProposalItemInter
 {
     friend bool operator<(const ClangAssistProposalItem &first, const ClangAssistProposalItem &second);
 public:
-    ClangAssistProposalItem() {}
-
-    bool prematurelyApplies(const QChar &c) const final;
+    bool prematurelyApplies(const QChar &typedCharacter) const final;
     bool implicitlyApplies() const final;
     void apply(TextEditor::TextEditorWidget *editorWidget, int basePosition) const final;
 
@@ -66,7 +64,7 @@ private:
     QList<ClangBackEnd::CodeCompletion> m_overloads;
     QString m_text;
     unsigned m_completionOperator;
-    mutable QChar m_typedChar;
+    mutable QChar m_typedCharacter;
 };
 
 } // namespace Internal
diff --git a/src/plugins/clangcodemodel/clangcodemodel.pro b/src/plugins/clangcodemodel/clangcodemodel.pro
index cf2b1ce027..e3a3294c8a 100644
--- a/src/plugins/clangcodemodel/clangcodemodel.pro
+++ b/src/plugins/clangcodemodel/clangcodemodel.pro
@@ -27,6 +27,7 @@ SOURCES += \
     clangfunctionhintmodel.cpp \
     clanghighlightingmarksreporter.cpp \
     clangmodelmanagersupport.cpp \
+    clangpreprocessorassistproposalitem.cpp \
     clangtextmark.cpp \
     clangutils.cpp
 
@@ -53,6 +54,7 @@ HEADERS += \
     clangfunctionhintmodel.h \
     clanghighlightingmarksreporter.h \
     clangmodelmanagersupport.h \
+    clangpreprocessorassistproposalitem.h \
     clangtextmark.h \
     clangutils.h
 
diff --git a/src/plugins/clangcodemodel/clangcodemodel.qbs b/src/plugins/clangcodemodel/clangcodemodel.qbs
index 5be9afc9a0..8d72501868 100644
--- a/src/plugins/clangcodemodel/clangcodemodel.qbs
+++ b/src/plugins/clangcodemodel/clangcodemodel.qbs
@@ -79,6 +79,8 @@ QtcPlugin {
         "clanghighlightingmarksreporter.h",
         "clangmodelmanagersupport.cpp",
         "clangmodelmanagersupport.h",
+        "clangpreprocessorassistproposalitem.cpp",
+        "clangpreprocessorassistproposalitem.h",
         "clangtextmark.cpp",
         "clangtextmark.h",
         "clangutils.cpp",
diff --git a/src/plugins/clangcodemodel/clangcompletionassistprocessor.cpp b/src/plugins/clangcodemodel/clangcompletionassistprocessor.cpp
index fc4cd98619..5f3f6f6c49 100644
--- a/src/plugins/clangcodemodel/clangcompletionassistprocessor.cpp
+++ b/src/plugins/clangcodemodel/clangcompletionassistprocessor.cpp
@@ -33,6 +33,7 @@
 #include "clangeditordocumentprocessor.h"
 #include "clangfunctionhintmodel.h"
 #include "clangcompletionchunkstotextconverter.h"
+#include "clangpreprocessorassistproposalitem.h"
 
 #include <cpptools/cppdoxygen.h>
 #include <cpptools/cppmodelmanager.h>
@@ -533,11 +534,11 @@ void ClangCompletionAssistProcessor::completeIncludePath(const QString &realPath
             if (fileInfo.isDir())
                 text += QLatin1Char('/');
 
-            auto *item = new ClangAssistProposalItem; // TODO: Add IncludeAssistProposalItem
+            auto *item = new ClangPreprocessorAssistProposalItem;
             item->setText(text);
-            //item->setDetail(hint);
-            //item->setIcon(m_icons.keywordIcon());
-            item->keepCompletionOperator(m_completionOperator);
+            item->setDetail(hint);
+            item->setIcon(m_icons.keywordIcon());
+            item->setCompletionOperator(m_completionOperator);
             m_completions.append(item);
         }
     }
@@ -567,11 +568,11 @@ void ClangCompletionAssistProcessor::addCompletionItem(const QString &text,
                                                        const QIcon &icon,
                                                        int order)
 {
-    ClangAssistProposalItem *item = new ClangAssistProposalItem;
+    auto *item = new ClangPreprocessorAssistProposalItem;
     item->setText(text);
-    //item->setIcon(icon); TODO: Add item for macros and includes
+    item->setIcon(icon);
     item->setOrder(order);
-    item->keepCompletionOperator(m_completionOperator);
+    item->setCompletionOperator(m_completionOperator);
     m_completions.append(item);
 }
 
diff --git a/src/plugins/clangcodemodel/clangpreprocessorassistproposalitem.cpp b/src/plugins/clangcodemodel/clangpreprocessorassistproposalitem.cpp
new file mode 100644
index 0000000000..23fcd4473b
--- /dev/null
+++ b/src/plugins/clangcodemodel/clangpreprocessorassistproposalitem.cpp
@@ -0,0 +1,169 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#include "clangpreprocessorassistproposalitem.h"
+
+#include <texteditor/texteditor.h>
+
+#include <cplusplus/Token.h>
+
+namespace ClangCodeModel {
+
+bool ClangPreprocessorAssistProposalItem::prematurelyApplies(const QChar &typedCharacter) const
+{
+    bool applies = false;
+
+    if (isInclude())
+        applies = typedCharacter == QLatin1Char('/') && text().endsWith(QLatin1Char('/'));
+
+    if (applies)
+        m_typedCharacter = typedCharacter;
+
+    return applies;
+}
+
+bool ClangPreprocessorAssistProposalItem::implicitlyApplies() const
+{
+    return false;
+}
+
+void ClangPreprocessorAssistProposalItem::apply(TextEditor::TextEditorWidget *editorWidget,
+                                                int basePosition) const
+{
+    // TODO move in an extra class under tests
+
+    QString textToBeInserted = text();
+
+    QString extraCharacters;
+    int extraLength = 0;
+    int cursorOffset = 0;
+
+    if (isInclude()) {
+        if (!textToBeInserted.endsWith(QLatin1Char('/'))) {
+            extraCharacters += QLatin1Char((m_completionOperator == CPlusPlus::T_ANGLE_STRING_LITERAL) ? '>' : '"');
+        } else {
+            if (m_typedCharacter == QLatin1Char('/')) // Eat the slash
+                m_typedCharacter = QChar();
+        }
+    }
+
+    if (!m_typedCharacter.isNull()) {
+        extraCharacters += m_typedCharacter;
+        if (cursorOffset != 0)
+            --cursorOffset;
+    }
+
+    // Avoid inserting characters that are already there
+    const int endsPosition = editorWidget->position(TextEditor::EndOfLinePosition);
+    const QString existingText = editorWidget->textAt(editorWidget->position(), endsPosition - editorWidget->position());
+    int existLength = 0;
+    if (!existingText.isEmpty()) {
+        // Calculate the exist length in front of the extra chars
+        existLength = textToBeInserted.length() - (editorWidget->position() - basePosition);
+        while (!existingText.startsWith(textToBeInserted.right(existLength))) {
+            if (--existLength == 0)
+                break;
+        }
+    }
+    for (int i = 0; i < extraCharacters.length(); ++i) {
+        const QChar a = extraCharacters.at(i);
+        const QChar b = editorWidget->characterAt(editorWidget->position() + i + existLength);
+        if (a == b)
+            ++extraLength;
+        else
+            break;
+    }
+
+    textToBeInserted += extraCharacters;
+
+    // Insert the remainder of the name
+    const int length = editorWidget->position() - basePosition + existLength + extraLength;
+    const auto textToBeReplaced = editorWidget->textAt(basePosition, length);
+
+    if (textToBeReplaced != textToBeInserted) {
+        editorWidget->setCursorPosition(basePosition);
+        editorWidget->replace(length, textToBeInserted);
+        if (cursorOffset)
+            editorWidget->setCursorPosition(editorWidget->position() + cursorOffset);
+    }
+}
+
+void ClangPreprocessorAssistProposalItem::setText(const QString &text)
+{
+    m_text = text;
+}
+
+QString ClangPreprocessorAssistProposalItem::text() const
+{
+    return m_text;
+}
+
+void ClangPreprocessorAssistProposalItem::setIcon(const QIcon &icon)
+{
+    m_icon = icon;
+}
+
+QIcon ClangPreprocessorAssistProposalItem::icon() const
+{
+    return m_icon;
+}
+
+void ClangPreprocessorAssistProposalItem::setDetail(const QString &detail)
+{
+    m_detail = detail;
+}
+
+QString ClangPreprocessorAssistProposalItem::detail() const
+{
+    return QString();
+}
+
+bool ClangPreprocessorAssistProposalItem::isSnippet() const
+{
+    return false;
+}
+
+bool ClangPreprocessorAssistProposalItem::isValid() const
+{
+    return true;
+}
+
+quint64 ClangPreprocessorAssistProposalItem::hash() const
+{
+    return 0;
+}
+
+void ClangPreprocessorAssistProposalItem::setCompletionOperator(uint completionOperator)
+{
+    m_completionOperator = completionOperator;
+}
+
+bool ClangPreprocessorAssistProposalItem::isInclude() const
+{
+    return m_completionOperator == CPlusPlus::T_STRING_LITERAL
+        || m_completionOperator == CPlusPlus::T_ANGLE_STRING_LITERAL;
+}
+
+} // namespace ClangCodeModel
diff --git a/src/plugins/clangcodemodel/clangpreprocessorassistproposalitem.h b/src/plugins/clangcodemodel/clangpreprocessorassistproposalitem.h
new file mode 100644
index 0000000000..7b63d432bd
--- /dev/null
+++ b/src/plugins/clangcodemodel/clangpreprocessorassistproposalitem.h
@@ -0,0 +1,72 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#ifndef CLANGCODEMODEL_PREPROCESSORASSISTPROPOSALITEM_H
+#define CLANGCODEMODEL_PREPROCESSORASSISTPROPOSALITEM_H
+
+#include <texteditor/codeassist/assistproposaliteminterface.h>
+
+#include <QIcon>
+#include <QString>
+
+namespace ClangCodeModel {
+
+class ClangPreprocessorAssistProposalItem final : public TextEditor::AssistProposalItemInterface
+{
+public:
+    bool prematurelyApplies(const QChar &typedChar) const final;
+    virtual bool implicitlyApplies() const final;
+    void apply(TextEditor::TextEditorWidget *editorWidget, int basePosition) const final;
+
+    void setText(const QString &text);
+    QString text() const final;
+
+    void setIcon(const QIcon &icon);
+    QIcon icon() const final;
+
+    void setDetail(const QString &detail);
+    QString detail() const final;
+
+    bool isSnippet() const final;
+    bool isValid() const final;
+
+    quint64 hash() const final;
+
+    void setCompletionOperator(uint completionOperator);
+
+private:
+    bool isInclude() const;
+
+private:
+    QString m_text;
+    QString m_detail;
+    QIcon m_icon;
+    uint m_completionOperator;
+    mutable QChar m_typedCharacter;
+};
+
+} // namespace ClangCodeModel
+
+#endif // CLANGCODEMODEL_PREPROCESSORASSISTPROPOSALITEM_H
diff --git a/src/plugins/texteditor/codeassist/assistproposaliteminterface.h b/src/plugins/texteditor/codeassist/assistproposaliteminterface.h
index 797bf78c7c..38fc4a2c73 100644
--- a/src/plugins/texteditor/codeassist/assistproposaliteminterface.h
+++ b/src/plugins/texteditor/codeassist/assistproposaliteminterface.h
@@ -48,7 +48,7 @@ public:
 
     virtual QString text() const = 0;
     virtual bool implicitlyApplies() const = 0;
-    virtual bool prematurelyApplies(const QChar &character) const = 0;
+    virtual bool prematurelyApplies(const QChar &typedCharacter) const = 0;
     virtual void apply(TextEditorWidget *editorWidget, int basePosition) const = 0;
     virtual QIcon icon() const = 0;
     virtual QString detail() const = 0;