Nim: Add support for goto field under cursor

Change-Id: Ic0cce41d2c3d8dc9bcc9ccd07c3943fd0b2659f9
Reviewed-by: hjk <hjk@qt.io>

13 files changed, 237 insertions, 51 deletions

diff --git a/src/plugins/nim/CMakeLists.txt b/src/plugins/nim/CMakeLists.txt
index 2601c60288..bee1b4ffbe 100644
--- a/src/plugins/nim/CMakeLists.txt
+++ b/src/plugins/nim/CMakeLists.txt
@@ -5,6 +5,7 @@ add_qtc_plugin(Nim
     editor/nimeditorfactory.cpp editor/nimeditorfactory.h
     editor/nimhighlighter.cpp editor/nimhighlighter.h
     editor/nimindenter.cpp editor/nimindenter.h
+    editor/nimtexteditorwidget.cpp editor/nimtexteditorwidget.h
     nim.qrc
     nimconstants.h
     nimplugin.cpp nimplugin.h
diff --git a/src/plugins/nim/editor/nimcompletionassistprovider.cpp b/src/plugins/nim/editor/nimcompletionassistprovider.cpp
index 9fcf30c4b0..9a808ff9d5 100644
--- a/src/plugins/nim/editor/nimcompletionassistprovider.cpp
+++ b/src/plugins/nim/editor/nimcompletionassistprovider.cpp
@@ -119,12 +119,12 @@ private:
         std::unique_ptr<QTemporaryFile> dirtyFile = writeDirtyFile(interface);
         QTC_ASSERT(dirtyFile, return);
 
-        std::shared_ptr<Suggest::SugRequest> request = sendRequest(interface,
+        std::shared_ptr<Suggest::NimSuggestClientRequest> request = sendRequest(interface,
                                                                    suggest,
                                                                    dirtyFile->fileName(),
                                                                    pos);
         QTC_ASSERT(request, return);
-        connect(request.get(), &Suggest::SugRequest::finished, this,
+        connect(request.get(), &Suggest::NimSuggestClientRequest::finished, this,
                 &NimCompletionAssistProcessor::onRequestFinished);
 
         m_pos = pos;
@@ -162,10 +162,10 @@ private:
         return Nim::Suggest::NimSuggestCache::instance().get(filename);
     }
 
-    static std::shared_ptr<Suggest::SugRequest> sendRequest(const AssistInterface *interface,
-                                                            Suggest::NimSuggest *suggest,
-                                                            QString dirtyFile,
-                                                            int pos)
+    static std::shared_ptr<Suggest::NimSuggestClientRequest> sendRequest(const AssistInterface *interface,
+                                                                         Suggest::NimSuggest *suggest,
+                                                                         QString dirtyFile,
+                                                                         int pos)
     {
         int line = 0, column = 0;
         Utils::Text::convertPosition(interface->textDocument(), pos, &line, &column);
@@ -256,7 +256,7 @@ private:
     bool m_running = false;
     int m_pos = -1;
     std::weak_ptr<Suggest::NimSuggest> m_suggest;
-    std::shared_ptr<Suggest::SugRequest> m_request;
+    std::shared_ptr<Suggest::NimSuggestClientRequest> m_request;
     std::unique_ptr<QTemporaryFile> m_dirtyFile;
     const TextEditor::AssistInterface *m_interface = nullptr;
 };
diff --git a/src/plugins/nim/editor/nimeditorfactory.cpp b/src/plugins/nim/editor/nimeditorfactory.cpp
index c6f4f17dff..48a3631162 100644
--- a/src/plugins/nim/editor/nimeditorfactory.cpp
+++ b/src/plugins/nim/editor/nimeditorfactory.cpp
@@ -30,6 +30,7 @@
 
 #include "../nimconstants.h"
 #include "../nimplugin.h"
+#include "nimtexteditorwidget.h"
 
 #include <texteditor/texteditoractionhandler.h>
 #include <texteditor/texteditorconstants.h>
@@ -50,12 +51,10 @@ NimEditorFactory::NimEditorFactory()
 
     setEditorActionHandlers(TextEditorActionHandler::Format
                             | TextEditorActionHandler::UnCommentSelection
-                            | TextEditorActionHandler::UnCollapseAll);
-
+                            | TextEditorActionHandler::UnCollapseAll
+                            | TextEditorActionHandler::FollowSymbolUnderCursor);
     setEditorWidgetCreator([]{
-        auto result = new TextEditorWidget();
-        result->setLanguageSettingsId(Nim::Constants::C_NIMLANGUAGE_ID);
-        return result;
+        return new NimTextEditorWidget();
     });
     setDocumentCreator([]() {
         return new TextDocument(Constants::C_NIMEDITOR_ID);
diff --git a/src/plugins/nim/editor/nimtexteditorwidget.cpp b/src/plugins/nim/editor/nimtexteditorwidget.cpp
new file mode 100644
index 0000000000..56d8dfacb2
--- /dev/null
+++ b/src/plugins/nim/editor/nimtexteditorwidget.cpp
@@ -0,0 +1,109 @@
+/****************************************************************************
+**
+** Copyright (C) Filippo Cucchetto <filippocucchetto@gmail.com>
+** Contact: http://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 "nimtexteditorwidget.h"
+#include "nimconstants.h"
+#include "suggest/nimsuggestcache.h"
+#include "suggest/nimsuggest.h"
+
+#include <texteditor/textdocument.h>
+#include <texteditor/codeassist/assistinterface.h>
+#include <utils/qtcassert.h>
+#include <utils/textutils.h>
+
+#include <QTextStream>
+#include <QTemporaryFile>
+#include <QTextDocument>
+
+using namespace Nim;
+using namespace Suggest;
+
+namespace {
+
+std::unique_ptr<QTemporaryFile> writeDirtyFile(const TextEditor::TextDocument *doc)
+{
+    auto result = std::make_unique<QTemporaryFile>("qtcnim.XXXXXX.nim");
+    QTC_ASSERT(result->open(), return nullptr);
+    QTextStream stream(result.get());
+    stream << doc->plainText();
+    result->close();
+    return result;
+}
+
+}
+
+NimTextEditorWidget::NimTextEditorWidget(QWidget *parent)
+    : TextEditorWidget(parent)
+{
+    setLanguageSettingsId(Nim::Constants::C_NIMLANGUAGE_ID);
+}
+
+void NimTextEditorWidget::findLinkAt(const QTextCursor &c, Utils::ProcessLinkCallback &&processLinkCallback, bool /*resolveTarget*/, bool /*inNextSplit*/)
+{
+    const Utils::FilePath &path = textDocument()->filePath();
+
+    NimSuggest *suggest = NimSuggestCache::instance().get(path);
+    if (!suggest)
+        return processLinkCallback(Utils::Link());
+
+    std::unique_ptr<QTemporaryFile> dirtyFile = writeDirtyFile(textDocument());
+
+    int line = 0, column = 0;
+    Utils::Text::convertPosition(document(), c.position(), &line, &column);
+
+    std::shared_ptr<NimSuggestClientRequest> request = suggest->def(path.toString(),
+                                                                             line,
+                                                                             column - 1,
+                                                                             dirtyFile->fileName());
+
+    if (!request)
+        return processLinkCallback(Utils::Link());
+
+    if (m_request) {
+        QObject::disconnect(m_request.get());
+        m_request = nullptr;
+    }
+
+    if (m_callback)
+        m_callback(Utils::Link());
+
+    m_dirtyFile = std::move(dirtyFile);
+    m_callback = std::move(processLinkCallback);
+    m_request = std::move(request);
+
+    QObject::connect(m_request.get(), &NimSuggestClientRequest::finished, this, &NimTextEditorWidget::onFindLinkFinished);
+}
+
+void NimTextEditorWidget::onFindLinkFinished()
+{
+    QTC_ASSERT(m_request.get() == this->sender(), return);
+    if (m_request->lines().empty()) {
+        m_callback(Utils::Link());
+        return;
+    }
+
+    const Line &line = m_request->lines().front();
+    m_callback(Utils::Link{line.abs_path, line.row, line.column});
+}
diff --git a/src/plugins/nim/editor/nimtexteditorwidget.h b/src/plugins/nim/editor/nimtexteditorwidget.h
new file mode 100644
index 0000000000..8cbc207ebc
--- /dev/null
+++ b/src/plugins/nim/editor/nimtexteditorwidget.h
@@ -0,0 +1,49 @@
+/****************************************************************************
+**
+** Copyright (C) Filippo Cucchetto <filippocucchetto@gmail.com>
+** Contact: http://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.
+**
+****************************************************************************/
+
+#pragma once
+
+#include <texteditor/texteditor.h>
+
+namespace Nim {
+namespace Suggest { class NimSuggestClientRequest; }
+
+class NimTextEditorWidget : public TextEditor::TextEditorWidget
+{
+public:
+    NimTextEditorWidget(QWidget* parent = nullptr);
+
+protected:
+    void findLinkAt(const QTextCursor &, Utils::ProcessLinkCallback &&processLinkCallback, bool resolveTarget, bool inNextSplit);
+
+private:
+    void onFindLinkFinished();
+
+    std::shared_ptr<Nim::Suggest::NimSuggestClientRequest> m_request;
+    Utils::ProcessLinkCallback m_callback;
+    std::unique_ptr<QTemporaryFile> m_dirtyFile;
+};
+
+}
diff --git a/src/plugins/nim/nim.pro b/src/plugins/nim/nim.pro
index 46869353fb..7a49e8f48e 100644
--- a/src/plugins/nim/nim.pro
+++ b/src/plugins/nim/nim.pro
@@ -14,6 +14,7 @@ HEADERS += \
     editor/nimcompletionassistprovider.h \
     editor/nimhighlighter.h \
     editor/nimindenter.h \
+    editor/nimtexteditorwidget.h \
     project/nimblebuildconfiguration.h \
     project/nimblebuildstep.h \
     project/nimblebuildstepwidget.h \
@@ -53,6 +54,7 @@ SOURCES += \
     editor/nimcompletionassistprovider.cpp \
     editor/nimhighlighter.cpp \
     editor/nimindenter.cpp \
+    editor/nimtexteditorwidget.cpp \
     project/nimblebuildconfiguration.cpp \
     project/nimblebuildstep.cpp \
     project/nimbletaskstep.cpp \
diff --git a/src/plugins/nim/nim.qbs b/src/plugins/nim/nim.qbs
index 383999f377..bc9ce4d731 100644
--- a/src/plugins/nim/nim.qbs
+++ b/src/plugins/nim/nim.qbs
@@ -28,6 +28,7 @@ QtcPlugin {
             "nimeditorfactory.h", "nimeditorfactory.cpp",
             "nimhighlighter.h", "nimhighlighter.cpp",
             "nimindenter.h", "nimindenter.cpp",
+            "nimtexteditorwidget.h", "nimtexteditorwidget.cpp",
             "nimcompletionassistprovider.h", "nimcompletionassistprovider.cpp"
         ]
     }
diff --git a/src/plugins/nim/suggest/client.cpp b/src/plugins/nim/suggest/client.cpp
index 519bd43925..4c3323cfe7 100644
--- a/src/plugins/nim/suggest/client.cpp
+++ b/src/plugins/nim/suggest/client.cpp
@@ -53,22 +53,38 @@ bool NimSuggestClient::disconnectFromServer()
     return true;
 }
 
-std::shared_ptr<SugRequest> NimSuggestClient::sug(const QString &nimFile,
-                                                  int line, int column,
-                                                  const QString &dirtyFile)
+std::shared_ptr<NimSuggestClientRequest> NimSuggestClient::sug(const QString &nimFile,
+                                                               int line, int column,
+                                                               const QString &dirtyFile)
+{
+    return sendRequest(QLatin1String("sug"), nimFile, line, column, dirtyFile);
+}
+
+std::shared_ptr<NimSuggestClientRequest> NimSuggestClient::def(const QString &nimFile,
+                                                               int line, int column,
+                                                               const QString &dirtyFile)
+{
+    return sendRequest(QLatin1String("def"), nimFile, line, column, dirtyFile);
+}
+
+std::shared_ptr<NimSuggestClientRequest> NimSuggestClient::sendRequest(const QString& type,
+                                                                       const QString &nimFile,
+                                                                       int line, int column,
+                                                                       const QString &dirtyFile)
 {
     if (!m_socket.isOpen())
         return nullptr;
 
-    auto result = std::make_shared<SugRequest>(m_lastMessageId++);
+    auto result = std::make_shared<NimSuggestClientRequest>(m_lastMessageId++);
     m_requests.emplace(result->id(), result);
 
-    QByteArray body = QString(R"((call %1 sug ("%2" %3 %4 "%5"))\n)")
-                      .arg(result->id())
-                      .arg(nimFile)
-                      .arg(line).arg(column)
-                      .arg(dirtyFile)
-                      .toUtf8();
+    QByteArray body = QString(R"((call %1 %2 ("%3" %4 %5 "%6"))\n)")
+            .arg(result->id())
+            .arg(type)
+            .arg(nimFile)
+            .arg(line).arg(column)
+            .arg(dirtyFile)
+            .toUtf8();
 
     QByteArray length = QString::number(body.size(), 16).rightJustified(6, '0').toUtf8();
     QByteArray message = length + body;
@@ -135,7 +151,7 @@ void NimSuggestClient::parsePayload(const char *payload, std::size_t size)
     if (it == m_requests.end())
         return;
 
-    auto req = std::dynamic_pointer_cast<SugRequest>((*it).second.lock());
+    auto req = std::dynamic_pointer_cast<NimSuggestClientRequest>((*it).second.lock());
     if (!req)
         return;
 
diff --git a/src/plugins/nim/suggest/client.h b/src/plugins/nim/suggest/client.h
index 7aeaa826d9..1e61cf3e10 100644
--- a/src/plugins/nim/suggest/client.h
+++ b/src/plugins/nim/suggest/client.h
@@ -49,15 +49,24 @@ public:
 
     bool disconnectFromServer();
 
-    std::shared_ptr<SugRequest> sug(const QString &nimFile,
-                                    int line, int column,
-                                    const QString &dirtyFile);
+    std::shared_ptr<NimSuggestClientRequest> sug(const QString &nimFile,
+                                                 int line, int column,
+                                                 const QString &dirtyFile);
+
+    std::shared_ptr<NimSuggestClientRequest> def(const QString &nimFile,
+                                                 int line, int column,
+                                                 const QString &dirtyFile);
 
 signals:
     void connected();
     void disconnected();
 
 private:
+    std::shared_ptr<NimSuggestClientRequest> sendRequest(const QString &type,
+                                                         const QString &nimFile,
+                                                         int line, int column,
+                                                         const QString &dirtyFile);
+
     void clear();
     void onDisconnectedFromServer();
     void onReadyRead();
@@ -65,7 +74,7 @@ private:
 
     QTcpSocket m_socket;
     quint16 m_port;
-    std::unordered_map<quint64, std::weak_ptr<BaseNimSuggestClientRequest>> m_requests;
+    std::unordered_map<quint64, std::weak_ptr<NimSuggestClientRequest>> m_requests;
     std::vector<QString> m_lines;
     std::vector<char> m_readBuffer;
     quint64 m_lastMessageId = 0;
diff --git a/src/plugins/nim/suggest/clientrequests.cpp b/src/plugins/nim/suggest/clientrequests.cpp
index c14d5f2bd2..4b1429a204 100644
--- a/src/plugins/nim/suggest/clientrequests.cpp
+++ b/src/plugins/nim/suggest/clientrequests.cpp
@@ -47,14 +47,10 @@ bool Line::fromString(Line::SymbolKind &type, const std::string &str)
     return result;
 }
 
-BaseNimSuggestClientRequest::BaseNimSuggestClientRequest(quint64 id)
+NimSuggestClientRequest::NimSuggestClientRequest(quint64 id)
     : m_id(id)
 {}
 
-quint64 BaseNimSuggestClientRequest::id() const
-{
-    return m_id;
-}
 
 } // namespace Suggest
 } // namespace Nim
diff --git a/src/plugins/nim/suggest/clientrequests.h b/src/plugins/nim/suggest/clientrequests.h
index fccddb6b3d..39c6719929 100644
--- a/src/plugins/nim/suggest/clientrequests.h
+++ b/src/plugins/nim/suggest/clientrequests.h
@@ -93,26 +93,17 @@ public:
     QString doc;
 };
 
-class BaseNimSuggestClientRequest : public QObject
+class NimSuggestClientRequest : public QObject
 {
     Q_OBJECT
 
 public:
-    BaseNimSuggestClientRequest(quint64 id);
+    NimSuggestClientRequest(quint64 id);
 
-    quint64 id() const;
-
-signals:
-    void finished();
-
-private:
-    const quint64 m_id;
-};
-
-class SugRequest : public BaseNimSuggestClientRequest
-{
-public:
-    using BaseNimSuggestClientRequest::BaseNimSuggestClientRequest;
+    quint64 id() const
+    {
+        return m_id;
+    }
 
     std::vector<Line> &lines()
     {
@@ -124,14 +115,19 @@ public:
         return m_lines;
     }
 
+signals:
+    void finished();
+
 private:
     friend class NimSuggestClient;
+
     void setFinished(std::vector<Line> lines)
     {
         m_lines = std::move(lines);
         emit finished();
     }
 
+    const quint64 m_id;
     std::vector<Line> m_lines;
 };
 
diff --git a/src/plugins/nim/suggest/nimsuggest.cpp b/src/plugins/nim/suggest/nimsuggest.cpp
index c06db62abf..e51efea054 100644
--- a/src/plugins/nim/suggest/nimsuggest.cpp
+++ b/src/plugins/nim/suggest/nimsuggest.cpp
@@ -76,12 +76,17 @@ bool NimSuggest::isReady() const
     return m_ready;
 }
 
-std::shared_ptr<SugRequest> NimSuggest::sug(const QString &filename, int line, int column,
-                                            const QString &dirtyFilename)
+std::shared_ptr<NimSuggestClientRequest> NimSuggest::sug(const QString &filename, int line, int column,
+                                                         const QString &dirtyFilename)
 {
     return m_ready ? m_client.sug(filename, line, column, dirtyFilename) : nullptr;
 }
 
+std::shared_ptr<NimSuggestClientRequest> NimSuggest::def(const QString &filename, int line, int column, const QString &dirtyFilename)
+{
+    return m_ready ? m_client.def(filename, line, column, dirtyFilename) : nullptr;
+}
+
 void NimSuggest::restart()
 {
     disconnectClient();
diff --git a/src/plugins/nim/suggest/nimsuggest.h b/src/plugins/nim/suggest/nimsuggest.h
index 981c63b628..5043455cec 100644
--- a/src/plugins/nim/suggest/nimsuggest.h
+++ b/src/plugins/nim/suggest/nimsuggest.h
@@ -46,8 +46,11 @@ public:
 
     bool isReady() const;
 
-    std::shared_ptr<SugRequest> sug(const QString &filename, int line, int column,
-                                    const QString &dirtyFilename);
+    std::shared_ptr<NimSuggestClientRequest> sug(const QString &filename, int line, int column,
+                                                 const QString &dirtyFilename);
+
+    std::shared_ptr<NimSuggestClientRequest> def(const QString &filename, int line, int column,
+                                                 const QString &dirtyFilename);
 
 signals:
     void readyChanged(bool ready);