Diff/Vcs: Use a function object for reloading

Helps with slimming down the user code side.

Change-Id: I4b0aac76c0d1516eb05bff9c18594e64f8b41a7a
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/diffeditor/diffeditorcontroller.cpp

@@ -123,6 +123,11 @@ void DiffEditorController::forceContextLineCount(int lines)
     m_document->forceContextLineCount(lines);
 }
 
+void DiffEditorController::setReloader(const std::function<void ()> &reloader)
+{
+    m_reloader = reloader;
+}
+
 Core::IDocument *DiffEditorController::document() const
 {
     return m_document;
@@ -135,7 +140,8 @@ void DiffEditorController::requestReload()
 {
     m_isReloading = true;
     m_document->beginReload();
-    reload();
+    QTC_ASSERT(m_reloader, reloadFinished(false); return);
+    m_reloader();
 }
 
 void DiffEditorController::reloadFinished(bool success)

src/plugins/diffeditor/diffeditorcontroller.h

@@ -72,15 +72,15 @@ public:
     bool chunkExists(int fileIndex, int chunkIndex) const;
     Core::IDocument *document() const;
 
+    // reloadFinished() should be called inside the reloader (for synchronous reload)
+    // or later (for asynchronous reload)
+    void setReloader(const std::function<void ()> &reloader);
+
 signals:
     void chunkActionsRequested(QMenu *menu, int fileIndex, int chunkIndex,
                                const ChunkSelection &selection);
 
 protected:
-    // reloadFinished() should be called
-    // inside reload() (for synchronous reload)
-    // or later (for asynchronous reload)
-    virtual void reload() = 0;
     void reloadFinished(bool success);
 
     void setDiffFiles(const QList<FileData> &diffFileList,
@@ -93,6 +93,7 @@ protected:
 private:
     Internal::DiffEditorDocument *const m_document;
     bool m_isReloading = false;
+    std::function<void()> m_reloader;
 
     friend class Internal::DiffEditorDocument;
 };

src/plugins/diffeditor/diffeditorplugin.cpp

@@ -130,11 +130,11 @@ class DiffFilesController : public DiffEditorController
     Q_OBJECT
 public:
     DiffFilesController(IDocument *document);
-    ~DiffFilesController() override;
+    ~DiffFilesController() override { cancelReload(); }
 
 protected:
-    void reload() final;
     virtual QList<ReloadInput> reloadInputList() const = 0;
+
 private:
     void reloaded();
     void cancelReload();
@@ -147,15 +147,8 @@ DiffFilesController::DiffFilesController(IDocument *document)
 {
     connect(&m_futureWatcher, &QFutureWatcher<FileData>::finished,
             this, &DiffFilesController::reloaded);
-}
 
-DiffFilesController::~DiffFilesController()
-{
-    cancelReload();
-}
-
-void DiffFilesController::reload()
-{
+    setReloader([this] {
         cancelReload();
         m_futureWatcher.setFuture(Utils::map(reloadInputList(),
                                              DiffFile(ignoreWhitespace(),
@@ -163,6 +156,7 @@ void DiffFilesController::reload()
 
         Core::ProgressManager::addTask(m_futureWatcher.future(),
                                        tr("Calculating diff"), "DiffEditor");
+    });
 }
 
 void DiffFilesController::reloaded()

src/plugins/git/gitclient.cpp

@@ -383,126 +383,87 @@ QStringList GitDiffEditorController::addHeadWhenCommandInProgress() const
 
 class RepositoryDiffController : public GitDiffEditorController
 {
-    Q_OBJECT
 public:
     explicit RepositoryDiffController(IDocument *document) :
         GitDiffEditorController(document)
-    { }
-
-    void reload() override;
-};
-
-void RepositoryDiffController::reload()
-{
+    {
+        setReloader([this] {
             QStringList args = {"diff"};
             args.append(addHeadWhenCommandInProgress());
-    runCommand(QList<QStringList>() << addConfigurationArguments(args));
-}
+            runCommand({addConfigurationArguments(args)});
+        });
+    }
+};
 
 class FileDiffController : public GitDiffEditorController
 {
-    Q_OBJECT
 public:
     FileDiffController(IDocument *document, const QString &fileName) :
-        GitDiffEditorController(document),
-        m_fileName(fileName)
-    { }
-
-    void reload() override;
-
-private:
-    const QString m_fileName;
-};
-
-void FileDiffController::reload()
-{
+        GitDiffEditorController(document)
+    {
+        setReloader([this, fileName] {
             QStringList args = {"diff"};
             args.append(addHeadWhenCommandInProgress());
-    args << "--" << m_fileName;
-
-    runCommand(QList<QStringList>() << addConfigurationArguments(args));
-}
+            args << "--" << fileName;
+            runCommand({addConfigurationArguments(args)});
+        });
+    }
+};
 
 class FileListDiffController : public GitDiffEditorController
 {
-    Q_OBJECT
 public:
     FileListDiffController(IDocument *document,
                            const QStringList &stagedFiles, const QStringList &unstagedFiles) :
-        GitDiffEditorController(document),
-        m_stagedFiles(stagedFiles),
-        m_unstagedFiles(unstagedFiles)
-    { }
-
-    void reload() override;
-
-private:
-    const QStringList m_stagedFiles;
-    const QStringList m_unstagedFiles;
-};
-
-void FileListDiffController::reload()
-{
+        GitDiffEditorController(document)
+    {
+        setReloader([this, stagedFiles, unstagedFiles] {
             QList<QStringList> argLists;
-    if (!m_stagedFiles.isEmpty()) {
+            if (!stagedFiles.isEmpty()) {
                 QStringList stagedArgs = {"diff", "--cached", "--"};
-        stagedArgs << m_stagedFiles;
+                stagedArgs << stagedFiles;
                 argLists << addConfigurationArguments(stagedArgs);
             }
 
-    if (!m_unstagedFiles.isEmpty()) {
+            if (!unstagedFiles.isEmpty()) {
                 QStringList unstagedArgs = {"diff"};
-        unstagedArgs << addHeadWhenCommandInProgress() << "--" << m_unstagedFiles;
+                unstagedArgs << addHeadWhenCommandInProgress() << "--" << unstagedFiles;
                 argLists << addConfigurationArguments(unstagedArgs);
             }
 
             if (!argLists.isEmpty())
                 runCommand(argLists);
-}
+        });
+    }
+};
 
 class ProjectDiffController : public GitDiffEditorController
 {
-    Q_OBJECT
 public:
     ProjectDiffController(IDocument *document, const QStringList &projectPaths) :
-        GitDiffEditorController(document),
-        m_projectPaths(projectPaths)
-    { }
-
-    void reload() override;
-
-private:
-    const QStringList m_projectPaths;
-};
-
-void ProjectDiffController::reload()
-{
+        GitDiffEditorController(document)
+    {
+        setReloader([this, projectPaths] {
             QStringList args = {"diff"};
-    args << addHeadWhenCommandInProgress() << "--" << m_projectPaths;
-    runCommand(QList<QStringList>() << addConfigurationArguments(args));
-}
+            args << addHeadWhenCommandInProgress() << "--" << projectPaths;
+            runCommand({addConfigurationArguments(args)});
+        });
+    }
+};
 
 class BranchDiffController : public GitDiffEditorController
 {
-    Q_OBJECT
 public:
     BranchDiffController(IDocument *document, const QString &branch) :
-        GitDiffEditorController(document),
-        m_branch(branch)
-    { }
-
-    void reload() override;
-
-private:
-    const QString m_branch;
-};
-
-void BranchDiffController::reload()
-{
+        GitDiffEditorController(document)
+    {
+        setReloader([this, branch] {
             QStringList args = {"diff"};
-    args << addHeadWhenCommandInProgress() << m_branch;
-    runCommand(QList<QStringList>() << addConfigurationArguments(args));
-}
+            args << addHeadWhenCommandInProgress() << branch;
+            runCommand({addConfigurationArguments(args)});
+        });
+    }
+};
 
 class ShowController : public GitDiffEditorController
 {
@@ -514,9 +475,14 @@ public:
         m_state(Idle)
     {
         setDisplayName("Git Show");
+        setReloader([this] {
+            m_state = GettingDescription;
+            const QStringList args = {"show", "-s", noColorOption, showFormatC, m_id};
+            runCommand({args}, GitPluginPrivate::client()->encoding(workingDirectory(), "i18n.commitEncoding"));
+            setStartupFile(VcsBase::source(this->document()));
+        });
     }
 
-    void reload() override;
     void processCommandOutput(const QString &output) override;
 
 private:
@@ -525,15 +491,6 @@ private:
     State m_state;
 };
 
-void ShowController::reload()
-{
-    // stage 1
-    m_state = GettingDescription;
-    const QStringList args = {"show", "-s", noColorOption, showFormatC, m_id};
-    runCommand(QList<QStringList>() << args, GitPluginPrivate::client()->encoding(workingDirectory(), "i18n.commitEncoding"));
-    setStartupFile(VcsBase::source(document()));
-}
-
 void ShowController::processCommandOutput(const QString &output)
 {
     QTC_ASSERT(m_state != Idle, return);

src/plugins/mercurial/mercurialclient.cpp

@@ -89,37 +89,27 @@ class FileDiffController : public MercurialDiffEditorController
 {
 public:
     FileDiffController(IDocument *document, const QString &fileName) :
-        MercurialDiffEditorController(document),
-        m_fileName(fileName)
-    { }
-
-    void reload() override
+        MercurialDiffEditorController(document)
     {
-        QStringList args = { "diff", m_fileName };
+        setReloader([this, fileName] {
+            QStringList args = { "diff", fileName };
             runCommand({ addConfigurationArguments(args) });
+        });
     }
-
-private:
-    const QString m_fileName;
 };
 
 class FileListDiffController : public MercurialDiffEditorController
 {
 public:
     FileListDiffController(IDocument *document, const QStringList &fileNames) :
-        MercurialDiffEditorController(document),
-        m_fileNames(fileNames)
-    { }
-
-    void reload() override
+        MercurialDiffEditorController(document)
     {
+        setReloader([this, fileNames] {
             QStringList args { "diff" };
-        args << m_fileNames;
+            args << fileNames;
             runCommand({addConfigurationArguments(args)});
+        });
     }
-
-private:
-    const QStringList m_fileNames;
 };
 
 
@@ -128,12 +118,11 @@ class RepositoryDiffController : public MercurialDiffEditorController
 public:
     RepositoryDiffController(IDocument *document) :
         MercurialDiffEditorController(document)
-    { }
-
-    void reload() override
     {
+        setReloader([this] {
             QStringList args = { "diff" };
             runCommand({addConfigurationArguments(args)});
+        });
     }
 };
 

src/plugins/subversion/subversionclient.cpp

@@ -175,13 +175,13 @@ public:
         : VcsBaseDiffEditorController(document), m_authenticationOptions(authOptions)
     {
         forceContextLineCount(3); // SVN cannot change that when using internal diff
+        setReloader([this] { m_changeNumber ? requestDescription() : requestDiff(); });
     }
 
     void setFilesList(const QStringList &filesList);
     void setChangeNumber(int changeNumber);
 
 protected:
-    void reload() override;
     void processCommandOutput(const QString &output) override;
 
 private:
@@ -242,15 +242,6 @@ void SubversionDiffEditorController::requestDiff()
     runCommand(QList<QStringList>() << args, 0);
 }
 
-void SubversionDiffEditorController::reload()
-{
-    if (m_changeNumber) {
-        requestDescription();
-    } else {
-        requestDiff();
-    }
-}
-
 void SubversionDiffEditorController::processCommandOutput(const QString &output)
 {
     QTC_ASSERT(m_state != Idle, return);