Write and edit source code

• To add a line after the current one, press CtrlShiftEnter. DataSpell moves the caret to the next line.

• To add a line before the current one, press CtrlAltEnter. DataSpell moves the caret to the previous line.

• To duplicate a line, press Ctrl0D.

• To sort lines alphabetically in the whole file or in a code selection, go to Edit | Sort Lines or Edit | Reverse Lines. These actions might be helpful when you work with property files, data sets, text files, log files, and so on. If you need to assign shortcuts to those actions, refer to Configure keyboard shortcuts for more information.

• To delete a line, place the caret at the line you need and press Ctrl0Y.

• To join lines, place the caret at the line to which you want to join the other lines and press CtrlShift0J. Keep pressing the keys until all the needed elements are joined.

  You can also join string literals, a field or variable declaration, and a statement. Note that DataSpell checks the code style settings and eliminates unwanted spaces and redundant characters.

• To split string literals into two parts, press Enter.

  DataSpell splits the string and provides the correct syntax. You can also use the Break string on '\n' intention to split string literals. Press AltEnter or click to select this intention.

• To comment a line of code, place the caret at the appropriate line and press Ctrl0/. Press Ctrl0/ again on the same line to uncomment it.

• To move a line up or down, press AltShift0↑ or AltShift0↓ respectively. When moving lines in Jupyter notebooks, the selected line is transferred to code cells ignoring any Markdown cells in between.

• To move (swap) a code element to the left or to the right, place the caret at it, or select it and press CtrlAltShift0← for left or CtrlAltShift0→ for right.

• When you copy (Ctrl0C) or cut (Ctrl0X) a line without any code selected, the paste action will add the contents of the clipboard to above the current line, not at your caret.

  If you want to paste your copied code at the caret, select the Paste at the caret position option in the advanced settings.

• Place the caret at a line or a symbol, right-click to open the context menu, select Copy/Paste Special | Copy Reference. When you select the Copy Reference (CtrlAltShift0C) option, DataSpell creates a reference string that includes the line number of the selected line or symbol. You can press Ctrl0V to paste the copied reference anywhere.

• DataSpell keeps track of everything you copy to the clipboard. To paste from history, in the editor, from the context menu, select Copy/Paste Special | Paste from History (CtrlShift0V). In the dialog that opens, select your entry and click Paste.

  tip

  The default number of items stored in the clipboard history is 100.

• When you copy and paste code to the editor, DataSpell displays the hidden (special) characters represented by their Unicode name abbreviation.

• In the editor, place the caret at the item you want to select and press Ctrl0W/CtrlShift0W to extend or shrink your selection.

  For example, in a plain text file, the selection starts within the whole word then extends to the sentence, paragraph, and so on.

• If you need just to highlight your braces, place the caret immediately after the block closing brace/bracket or before the block opening brace/bracket.

1. In the Settings dialog (CtrlAlt0S) , go to Editor | General | Smart Keys.

2. Select the Use "CamelHumps" words checkbox.

If you want to use double-click when selecting according to capitalization, make sure that the Honor "CamelHumps" words settings when selecting on double click checkbox right below is selected.

You can quickly locate all occurrences of the selected element in a file, make a multiple selection, or select the next or the previous occurrences.

• To make a multiple selection of occurrences in a file, select the needed element in your code, then press Alt0J. Press the same key to find the next occurrence.

  Alternatively, keeping ShiftAlt pressed, double-click or drag over the text you want to add to the selection.

• To move the caret to the next or the previous occurrence, press F3/ShiftF3.

  When you press F3, DataSpell automatically removes the selection of the current occurrence and selects the next one.

• To select all occurrences in the file, press CtrlAltShift0J.

• Move and copy code fragments by dragging them in the editor.

  • To move a code fragment, select it and drag the selection to the target location.

  • To copy a code selection, keeping Ctrl pressed, drag it to the target location.

  The drag functionality is enabled by default. To disable it, in the Settings dialog (CtrlAlt0S) , go to Editor | General and clear the Move code fragments with drag-and-drop checkbox in the Mouse Control section.

• To toggle between the upper and lower case for the selected code fragment, press CtrlShift0U.

  Note that when you apply the toggle case action to the CamelCase name format, DataSpell converts the name to the lower case.

• To comment or uncomment a code fragment, select it and press CtrlShift0/.

  To configure settings for commenting behavior, use options in the Comment Code section, on the Code Generation tab located in the language-specific pages under File | Settings | Editor | Code Style.

1. Press CtrlAlt0S to open the IDE settings and select Editor | General | Code Completion.

2. Under Machine Learning Completion Ranking, enable the Sort completion suggestions based on machine learning option, and select the languages for which you want to use ML completion.

1. Press CtrlAlt0S to open the IDE settings and select Editor | General | Code Completion.

2. Enable the following options:

   • Mark position changes in the completion popup: use the and icons to indicate whether the relevance of a suggestion is increasing or decreasing and therefore the suggestion has moved up or down the suggestion list.

   • Mark the most relevant item in the completion popup: use the icon to indicate the most suitable suggestion on the list.

   The suggestion list will look as follows with the icons marking reordered and the most relevant items.

   

• To add or remove multiple carets, press and hold ShiftAlt and click at the next location of the caret.

  Alternatively, to add multiple carets, you can press Ctrl twice, and then without releasing it, press the Up or Down arrow keys. You can also make a multiple selection by pressing ShiftAlt and dragging the caret.

• To delete all added carets, press Esc.

• You can make a multiple selection of code in columns. To enable or disable the column selection mode, press AltShiftInsert or use the context menu of the editor.

  This mode is helpful when you want to edit several lines of code simultaneously. Place the caret at a symbol you need and either drag it up or down, or select a block of code and press the specified shortcut to achieve the same result.

  You can change the behavior of the caret move when you press Alt. The default behavior is to move the caret to the end of the current word. To change this setting, open settings CtrlAlt0S and navigate to Editor | General. In the Caret Movement section, select an appropriate behavior from the list.

  

  note

  By default, the column selection mode is disabled. When enabled, the mode affects only the current editor and is disabled if you close and reopen the editor.

1. Open the Settings dialog (CtrlAlt0S) and go to Editor | Inlay Hints.

2. Expand <required language> under Parameter names.

3. Specify the context in which you want parameter hints shown by selecting the corresponding checkboxes.

   The preview shows how the changes you make in the settings affect the code appearance.

4. For some methods and functions, DataSpell does not show parameter hints in any context. Click Exclude list... to view these methods and functions, possibly enable parameter hints for them, or add new items to the list.

• To fold or unfold a code fragment, press CtrlNumPad -/CtrlNumPad +. DataSpell folds or unfolds the current code fragment, for example, a single method.

• To collapse or expand all code fragments, press CtrlShiftNumPad -/CtrlShiftNumPad +.

  DataSpell collapses or expands all fragments within the selection, or, if nothing is selected, all fragments in the current file, for example, all methods in a file.

• To collapse or expand code recursively, press CtrlAltNumPad -/CtrlAltNumPad +. DataSpell collapses or expands the current fragment and all its subordinate regions within that fragment.

• To fold blocks of code, press CtrlShift0.. This action collapses the code fragment between the matched pair of curly braces {}, creates a custom folding region for that fragment, and makes it "foldable".

• To collapse or expand doc comments in the current file, in the main menu select Code | Folding | Expand doc comments/Collapse doc comments.

• To collapse or expand a custom code fragment, select it and press Ctrl0..

  You can fold or unfold any manually selected regions in code.

• To expand the current fragment and all the nested fragments, press CtrlNumPad *,01. You can expand the current fragment up to the specified nesting level (from 1 to 5).

• To expand all the collapsed fragments in the file, press CtrlShiftNumPad *,01. You can expand the collapsed fragments up to the specified nesting level (from 1 to 5).

You can collapse or expand code using the Surround With action.

1. In the editor, select a code fragment and press CtrlAlt0T.

2. From the popup menu, select <editor-fold...> Comments or region...endregion Comments.

3. Optionally, specify a description under which the collapsed fragment will be hidden.

4. To collapse or expand the created region, press Ctrl0..

5. To navigate to the created custom region, press CtrlAlt0..

You can hide the code folding arrow icons that appear in the gutter.

1. In the Settings dialog (CtrlAlt0S) , go to Editor | General | Code Folding.

2. Clear the Show code folding arrows checkbox.

   note

   This option is available only in the new UI. In the classic UI, use the Show code folding outline option instead.

1. Press CtrlAlt0S to open the IDE settings and then select Appearance and Behavior | System Settings.

2. Under Sync external changes, configure the following options:

   • Save files when switching to a different application or a built-in terminal

   • Save files if the IDE is idle for N seconds

1. Press CtrlAlt0S to open the IDE settings and then select Editor | General | Editor Tabs.

2. Select the Mark modified (*) checkbox.

• For most recent changes, including refactorings, press Ctrl0Z or choose Edit | Undo from the menu.

• For a more detailed view of past changes, use Local History.

• For the most robust tracking of all changes, use a version control system.

1. To configure autosave actions for the current project, in the Settings dialog (CtrlAlt0S) , open Tools | Actions on Save.

   To configure the actions for new projects, go to File | New Projects Setup | Preferences for New Projects | Tools | Actions on Save in the main menu.

2. Select the checkboxes next to the actions that you want to trigger on save:

   • Reformat code: reformat your code according to your current code style settings.

   • Optimize imports: remove unused imports and organize import statements according to your current code style settings.

   • Upload to default server: upload modified files to your default deployment server.

3. For some actions, you can configure the settings more precisely. To do so, hover over an action and click the configuration link.

   For example, for code reformatting, you can specify files and folders that you don't want to change. Hover over the action and click Configure scope to exclude specific files and folders from reformatting.

   You can also select whether to reformat the whole file or only modified lines.

4. Apply the changes and close the dialog.

Once the necessary actions are enabled, they will be automatically triggered on every save (autosave, explicit save invoked with Ctrl0S or by selecting File | Save All) as you work with your project.

1. In the editor, select an element you want to rename. If you need to rename a file, select one in the Project tool window.

2. Press ShiftF6 or go to Code | Refactor | Rename.

3. In the Rename dialog, enter a new name of the element to enable the Preview and Refactor buttons.

   

   You can specify additional options. For example, specify where to search for element occurrences, or what else to rename. You can also specify a scope for the refactoring.

4. Click Preview to see the potential changes or click Refactor.

   When you click Preview, DataSpell opens the Find tool window with the results of found usages where you can check the results and confirm the refactoring (Do Refactor).

   All the occurrences of the element will be renamed.

   

Next time you invoke the Rename refactoring, DataSpell remembers the options you have specified inside the Rename dialog.

1. Select a code element to refactor. Go to Code | Refactor this....

2. In the Refactor This popup window, select the target refactoring, for example, Introduce Variable...

   

3. DataSpell provides you with the list of possible variable names. You can pick one or type a name of your choice.

   

1. In the editor, select a code fragment you want to reformat.

2. Go to Code | Format | Reformat Code or press CtrlAlt0L. The IDE notifies you on the result of reformatting.

   

   If you don't select a code fragment, DataSpell will reformat the whole file.

1. Either open your file in the editor and press CtrlAltShift0L or in the Workspace tool window, right-click the file and select Reformat Code.

   Keep pressing Shift and select additional files for a group reformatting.

2. In the dialog that opens, if you need, select the following reformatting options:

   • Optimize imports: select this option if you want to remove unused imports, add missing ones, or organize import statements.

   • Rearrange entries: select this option if you need to rearrange your code based on the arrangement rules specified in the code style settings.

   • Only VSC changed text: select this option to rearranged only fragments that have been modified in the version control system.

   • Cleanup code: select this option to run the code cleanup inspections.

   If you want to see the exact changes made to your code during the reformatting, use the Local History feature.