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Bug: Broken Paste logic #4305
Description
Using this extension causes issues with the copy function in VS Code.
Step to Reproduce:
Create a file like test.java, the content is:
class test {
private String function () {
String a = "555\n555";
a = "ggg";
return a;
}
}
Scenario A (Selection Paste): Use the mouse to select the \n characters (inside the double quotes), copy them, and attempt to paste them.
Scenario B (Line Copy/Paste): Place the cursor anywhere inside the double quotes (on the line String a = "\n";) without selecting any text. Use the VS Code shortcut Ctrl + C then Ctrl + V (intended to duplicate the entire line).
Expected Behavior:
Scenario A
Before Paste
After Paste
Scenario B
Before Paste
After Paste
Actual Behavior:
Scenario A
Scenario B
If I place the cursor inside the double quotes
I press ctrl c & ctrl v
Activity
fbricon commentedon Jan 13, 2026
The paste logic mostly does what it's supposed to do: escape the content before pasting it into a Java String (see #1249). So it will literally escape all new lines from the clipboard to insert into a compilable java String.
What you're expecting is raw pasting, you can choose by either Ctrl+Shift+P, or selecting "Insert Plain Text"
you can also disable Java smart pasting entirely with this setting:
Now admittedly, at least one thing is not working as expected:
a = "ggg";line, then Ctrl+C then Ctrl+Shift+P (Insert plain text) inside the quotes doesn't just duplicate the line, but pastes the whole content into the existing line.fbricon commentedon Jan 13, 2026
@CookedMelon the proposed changes in #4306 should fix the duplicate line problem.
Smart pasting could be improved so that pasting
\ninside"555\n555"can turn into"555\n\\n555"(as in Eclipse), instead of aggressively adding a new lineBut that needs to happen in https://github.com/eclipse-jdtls/eclipse.jdt.ls/blob/main/org.eclipse.jdt.ls.core/src/org/eclipse/jdt/ls/core/internal/handlers/PasteEventHandler.java#L279