// Copyright (C) 2022 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only

/*!
    \page creator-editor-refactoring.html
    \previouspage creator-editor-locator.html
    \nextpage creator-editor-quick-fixes.html

    \title Refactoring

    Refactor code to:

    \list
        \li Improve internal quality of your application
        \li Improve performance and extensibility
        \li Improve code readability and maintainability
        \li Simplify code structure
    \endlist

    \QC allows you to quickly and conveniently apply actions to refactor your
    code by selecting them in a context menu. For more information, see
    \l{Applying Refactoring Actions}.

    By default, the refactored files are saved automatically. To disable
    this feature, deselect \uicontrol Edit > \uicontrol Preferences >
    \uicontrol System > \uicontrol {Auto-save files after refactoring}.

    \if defined(qtcreator)
    \section1 Finding Symbols

    To find instances of a specific symbol in your Qt C++ project, place the
    cursor on the symbol in the editor and select \uicontrol Tools >
    \uicontrol {C++} > \uicontrol {Find References to Symbol Under Cursor} or
    press \key {Ctrl+Shift+U}.

    \image qtcreator-find-references-to-symbol-under-cursor.png "Search results for finding references to symbols"

    To view the same results color-coded according to the access type, such as
    read, write, or declaration, select \uicontrol Tools > \uicontrol {C++} >
    \uicontrol {Find References with Access Type}.

    \note You can also select \uicontrol Edit > \uicontrol {Find/Replace} >
    \uicontrol {Advanced Find} > \uicontrol {C++ Symbols} to search for
    classes, functions, enums, and declarations (including type aliases) either
    from files listed as part of the project or from all files that are used by
    the code, such as include files.
    \image qtcreator-search-cpp-symbols.png
    \endif

    \section1 Finding QML Types

    To find instances of a specific QML type in a project, place the cursor on
    the type and select \uicontrol Tools > \uicontrol {QML/JS} >
    \uicontrol {Find References to Symbol Under Cursor} or press
    \key {Ctrl+Shift+U}.

    \section1 Viewing Search Results

    \QC searches from the following locations:

    \list
        \li Files listed as a part of the project
        \li Files directly used by the project files (for example, generated
            files)
        \if defined(qtcreator)
        \li Header files of used frameworks and libraries
        \endif
    \endlist

    \l{Search Results} shows the location and number of search hits in the
    current project.

    \if defined(qtcreator)
    \image qtcreator-refactoring-find.png
    \else
    \image qml-find-usages.png
    \endif

    You can browse the search results in the following ways:

    \list
        \li To go directly to an instance, double-click the instance in
            \uicontrol {Search Results}.
        \li To move between instances, click the \inlineimage icons/next.png
            (\uicontrol {Next Item}) button and \inlineimage icons/prev.png
            (\uicontrol {Previous Item}) button in \uicontrol {Search Results}.
        \li To expand and collapse the list of all instances, click the
            \inlineimage icons/qtcreator-expand.png
            (\uicontrol {Expand All}) button.
        \li To filter the search results for the usage of symbols according to
            access type, such as read, write, or declaration, click the
            \inlineimage icons/filtericon.png
            (\uicontrol {Filter Tree}) button and select the access type.
        \li To clear the search results, click the
            \inlineimage icons/clean_pane_small.png
            (\uicontrol Clear) button.
        \li To start a new search, click the
            \inlineimage icons/qtcreator-new-search-icon.png
            (\uicontrol {New Search}) button.
    \endlist

    \section1 Renaming Symbols

    You can rename symbols in all files in a project.
    \if defined(qtcreator)
    When you rename a class, you can also change filenames that match the
    class name.

    To rename a C++ symbol in a project, place the cursor
    on it and select \uicontrol Tools > \uicontrol {C++} >
    \uicontrol {Rename Symbol Under Cursor} or press \key {Ctrl+Shift+R}.
    Use the keyboard shortcut to rename Python symbols.
    \endif

    To rename a QML type in a project, select \uicontrol Tools >
    \uicontrol {QML/JS} > \uicontrol {Rename Symbol Under Cursor}
    or press \key {Ctrl+Shift+R}.

    \uicontrol {Search Results} shows the location
    and number of instances of the symbol in the current project.

    \if defined(qtcreator)
    \image qtcreator-refactoring-replace.png
    \else
    \image qml-rename-symbol.png
    \endif

    To replace all selected instances, enter the name of the new symbol
    in the \uicontrol {Replace with} text box, and select \uicontrol Replace.
    To omit an instance, deselect the check box next to the instance.

    \note This action replaces all selected instances of the symbol in
    all files listed in \uicontrol {Search Results}. You cannot
    undo this action.

    \if defined(qtcreator)
    If the symbol is a class, select the \uicontrol {Rename files} check
    box to also change the filenames that match the class name.

    \note Renaming local symbols does not open \uicontrol {Search Results}.
    The instances of the symbol are highlighted in code and you can edit
    the symbol. All instances of the local symbol are changed as you type.
    \endif
   */