Intellij IDEA, control page up, page down scroll size - intellij-idea

Question

I am not satisfied with the scrolling behaviour in intellij for page up, page down. It doesn't feel right. It always feels as if I get out of the scope.
Is it possible to adjust the scroll size of page up, page down? Perhaps to half a page or similar.

Answer 1

I had taken #yole's answer and implemented all of the actions he had described in a separate plugin:
There is no way to control this through the settings. What you can do is write a plugin that performs scrolling in the way that you prefer. It's fairly easy: all you need to do is copy the existing
PageUpAction/PageDownAction classes and the methods they call
(EditorActionUtil.moveCaretPageUp/Down) to scroll by as much as you want.
This plugin implements new actions "Partial Page Up" and "Partial Page Down" which allow one to scroll a configurable size of screen definable in the usual IDEA settings dialog.
There's an installable version of the plugin in official JetBrains repository.

Answer 2

There is no way to control this through the settings. What you can do is write a plugin that performs scrolling in the way that you prefer. It's fairly easy: all you need to do is copy the existing PageUpAction/PageDownAction classes and the methods they call (EditorActionUtil.moveCaretPageUp/Down) to scroll by as much as you want.

Answer 3

Since many are inquiring about this, for mac users this can be controlled globally instead by instead scrolling on page up/down using karabiner application and adding the following complex rule:
{
"description": "mmm.karabiner.page.up.down.to.scroll",
"manipulators": [
{
"conditions": [
{
"bundle_identifiers": [
"^net.java.openjdk.cmd",
"^com.jetbrains.intellij"
],
"type": "frontmost_application_if"
}
],
"from": {
"key_code": "page_up"
},
"to": [
{
"mouse_key": {
"vertical_wheel": -51
}
}
],
"to_delayed_action": {
"to_if_invoked": [
{
"pointing_button": "button1"
}
]
},
"type": "basic"
},
{
"conditions": [
{
"bundle_identifiers": [
"^net.java.openjdk.cmd",
"^com.jetbrains.intellij"
],
"type": "frontmost_application_unless"
}
],
"from": {
"key_code": "page_up"
},
"to": [
{
"mouse_key": {
"vertical_wheel": -51
}
}
],
"type": "basic"
},
{
"conditions": [
{
"bundle_identifiers": [
"^net.java.openjdk.cmd",
"^com.jetbrains.intellij"
],
"type": "frontmost_application_if"
}
],
"from": {
"key_code": "up_arrow",
"modifiers": {
"mandatory": [
"fn"
]
}
},
"to": [
{
"mouse_key": {
"vertical_wheel": -51
}
}
],
"to_delayed_action": {
"to_if_invoked": [
{
"pointing_button": "button1"
}
]
},
"type": "basic"
},
{
"conditions": [
{
"bundle_identifiers": [
"^net.java.openjdk.cmd",
"^com.jetbrains.intellij"
],
"type": "frontmost_application_unless"
}
],
"from": {
"key_code": "up_arrow",
"modifiers": {
"mandatory": [
"fn"
]
}
},
"to": [
{
"mouse_key": {
"vertical_wheel": -51
}
}
],
"type": "basic"
},
{
"conditions": [
{
"bundle_identifiers": [
"^net.java.openjdk.cmd",
"^com.jetbrains.intellij"
],
"type": "frontmost_application_if"
}
],
"from": {
"key_code": "page_down"
},
"to": [
{
"mouse_key": {
"vertical_wheel": 51
}
}
],
"to_delayed_action": {
"to_if_invoked": [
{
"pointing_button": "button1"
}
]
},
"type": "basic"
},
{
"conditions": [
{
"bundle_identifiers": [
"^net.java.openjdk.cmd",
"^com.jetbrains.intellij"
],
"type": "frontmost_application_unless"
}
],
"from": {
"key_code": "page_down"
},
"to": [
{
"mouse_key": {
"vertical_wheel": 51
}
}
],
"type": "basic"
},
{
"conditions": [
{
"bundle_identifiers": [
"^net.java.openjdk.cmd",
"^com.jetbrains.intellij"
],
"type": "frontmost_application_if"
}
],
"from": {
"key_code": "down_arrow",
"modifiers": {
"mandatory": [
"fn"
]
}
},
"to": [
{
"mouse_key": {
"vertical_wheel": 51
}
}
],
"to_delayed_action": {
"to_if_invoked": [
{
"pointing_button": "button1"
}
]
},
"type": "basic"
},
{
"conditions": [
{
"bundle_identifiers": [
"^net.java.openjdk.cmd",
"^com.jetbrains.intellij"
],
"type": "frontmost_application_unless"
}
],
"from": {
"key_code": "down_arrow",
"modifiers": {
"mandatory": [
"fn"
]
}
},
"to": [
{
"mouse_key": {
"vertical_wheel": 51
}
}
],
"type": "basic"
}
]
},
Also do note, to get smooth scrolling, consider down loading Mos application and adjust the preferences if desired.
https://mos.caldis.me/
This might have other consequences on your Mac so you might need to have to adjust other things since your page_up/down is no longer a page_up/down but mouse scrolls instead.