如何在Aptana Studio 3的PyDev中自定义代码折叠功能？

Absolutely! You can tailor the code folding behavior to work with your existing comment-based module headers. Below are two practical approaches to achieve this:

Approach 1: Use Standard Eclipse Fold Comments (Quick & Reliable) #

This is the most straightforward method since it leverages a built-in Eclipse/PyDev feature that’s universally supported. You’ll wrap each module block with special comment markers that the editor recognizes as foldable regions:

# <editor-fold desc="DEFINE CONSTANTS">
# ********** DEFINE CONSTANTS **********
DEBUGGING = False
VERSION = "1.4.6"
# </editor-fold>

# <editor-fold desc="DEFINE FUNCTIONS">
# ********** DEFINE FUNCTIONS **********
def get_member_level(membernum):
    pass
def get_item_discount(itemnum):
    pass
def last_function():
    pass
# </editor-fold>

# <editor-fold desc="DEFINE CLASSES">
# ********** DEFINE CLASSES **********
class ButtonListPanel():
    pass
# </editor-fold>

• After adding these markers, you’ll see fold/unfold arrows appear next to your header comments—click them to collapse or expand entire modules.
• To avoid manual editing for existing code, use Aptana’s find-and-replace to batch-update your headers:
  1. Open the Replace tool with Ctrl+H (Windows/Linux) or Cmd+H (Mac).
  2. For the find pattern, use: (#\s*\*{10,}\s*(.*)\s*\*{10,})
  3. For the replace pattern, use: # <editor-fold desc="$2">\n$1
  4. Run the replace, then manually add # </editor-fold> at the end of each module (right before the next header or end of file).

Approach 2: Customize PyDev’s Folding Rules (No Code Changes Needed) #

If you don’t want to modify your existing code, you can configure PyDev to automatically recognize your header comments as foldable region starts. Here’s how:

1. Open Aptana’s Preferences: Window > Preferences (Windows/Linux) or Aptana Studio > Preferences (Mac).
2. Navigate to PyDev > Editor > Folding.
3. Ensure "Enable folding" and "Enable user defined fold regions" are both checked.
4. Click the Add button under "User defined fold regions" to create a new rule:
   • Start pattern: ^#\s*\*{5,}\s*DEFINE.*$ (matches your header lines: starts with #, followed by multiple asterisks, then DEFINE text)
   • End pattern: ^#\s*\*{5,}\s*DEFINE.*$|^\Z (matches the next header line, or the end of the file)
   • Check the Multiline box to ensure the fold covers all content between headers.
5. Click Apply then OK, and restart Aptana Studio to apply the changes.

Once set up, PyDev will automatically fold content between each of your header comments, giving you the exact behavior you want without altering your code.

Note: If the custom regex rule doesn’t work perfectly, tweak the pattern to match your specific header format (e.g., adjust the number of asterisks or add support for non-DEFINE headers if needed).

内容的提问来源于stack exchange，提问作者Gary R.