[UI] IJPL-189623 Introduce keys for stripe button text offsets

This determines the absolute shift of the text rectangle.
Therefore, the local variable textOffset is renamed to textPadding
as it wasn't exactly an offset, to avoid confusion.

The default offsets are zero because texts are normally centered.
But for island themes we'll need this shift to compensate
for the island's border.

GitOrigin-RevId: 4cd028116d262d8ad2edd0f8c4cda6e4c2332329

platform/platform-impl/src/com/intellij/openapi/wm/impl/SquareStripeButton.kt

@@ -14,11 +14,7 @@ import com.intellij.openapi.project.DumbAwareToggleAction
 import com.intellij.openapi.util.ScalableIcon
 import com.intellij.openapi.wm.ToolWindowAnchor
 import com.intellij.openapi.wm.impl.SquareStripeButton.Companion.createMoveGroup
-import com.intellij.toolWindow.ResizeStripeManager
-import com.intellij.toolWindow.StripeButtonUi
-import com.intellij.toolWindow.ToolWindowEventSource
-import com.intellij.toolWindow.ToolWindowLeftToolbar
-import com.intellij.toolWindow.ToolWindowToolbar
+import com.intellij.toolWindow.*
 import com.intellij.ui.*
 import com.intellij.ui.icons.loadIconCustomVersionOrScale
 import com.intellij.ui.icons.toStrokeIcon
@@ -135,10 +131,11 @@ internal class SquareStripeButton(action: SquareAnActionButton, val toolWindow:
           val texts = getStripeSplitText()
           val button = this@SquareStripeButton
           val insets = button.insets
-          val textOffset = if (UISettings.Companion.getInstance().compactMode) 4 else 6
-          val x = insets.left + JBUI.scale(textOffset)
+          val textPadding = if (UISettings.getInstance().compactMode) 4 else 6
+          val textOffset = JBUI.CurrentTheme.Toolbar.stripeToolbarTextOffset(button.isOnTheLeftStripe())
+          val x = insets.left + JBUI.scale(textPadding + textOffset)
           var y = iconPosition.y + JBUI.scale(3)
-          val totalWidth = button.width - insets.left - insets.right - JBUI.scale(textOffset * 2)
+          val totalWidth = button.width - insets.left - insets.right - JBUI.scale(textPadding * 2)
           val textHeight = fm.height
           var firstX: Int? = null
 

platform/platform-resources/src/themes/darcula.theme.json

@@ -830,7 +830,10 @@
       "leftStripeIconWithName.padding": "4,4,4,4",
       "rightStripeIconWithName.padding": "4,4,4,4",
       "leftStripeIconWithName.padding.compact": "3,3,3,3",
-      "rightStripeIconWithName.padding.compact": "3,3,3,3"
+      "leftStripeTextOffset": 0,
+      "leftStripeTextOffset.compact": 0,
+      "rightStripeTextOffset": 0,
+      "rightStripeTextOffset.compact": 0
     },
 
     "Tooltip": {

platform/platform-resources/src/themes/metadata/IntelliJPlatform.themeMetadata.json

@@ -1741,6 +1741,16 @@
       "description": "Tool window right stripe button icon padding with tool window names on",
       "since": "2025.3"
     },
+    {
+      "key": "StripeToolbar.Button.leftStripeTextOffset",
+      "description": "The horizontal text offset for tool window names on the left stripe",
+      "since": "2025.3"
+    },
+    {
+      "key": "StripeToolbar.Button.rightStripeTextOffset",
+      "description": "The horizontal text offset for tool window names on the right stripe",
+      "since": "2025.3"
+    },
     {
       "key": "List.hoverBackground",
       "since": "2020.3",

platform/util/ui/api-dump.txt

@@ -4729,6 +4729,7 @@ f:com.intellij.util.ui.JBUI$CurrentTheme$Toolbar
 - s:stripeToolbarButtonIconSizeKey():java.lang.String
 - s:stripeToolbarButtonSize():java.awt.Dimension
 - s:stripeToolbarButtonSizeKey():java.lang.String
+- s:stripeToolbarTextOffset(Z):I
 - s:toolbarButtonInsets():java.awt.Insets
 - s:toolbarButtonInsets(Z):java.awt.Insets
 - s:verticalInsetsKey():java.lang.String

platform/util/ui/src/com/intellij/util/ui/JBUI.java

@@ -1336,6 +1336,14 @@ public final class JBUI {
       private static @NotNull JBInsets defaultStripeToolbarButtonIconPadding() {
         return insets(5);
       }
+
+      public static int stripeToolbarTextOffset(boolean left) {
+        return getInt(stripeToolbarTextOffsetKey(left), 0);
+      }
+
+      private static @NotNull String stripeToolbarTextOffsetKey(boolean left) {
+        return "StripeToolbar.Button." + (left ? "left" : "right") + "StripeTextOffset";
+      }
     }
 
     public static final class FloatingToolbar {