feat(block): allow leading and trailing diamond

relates to #5121

src/engine/block.go

@@ -45,6 +45,9 @@ type Block struct {
 	Filler    string         `json:"filler,omitempty" toml:"filler,omitempty"`
 	Overflow  Overflow       `json:"overflow,omitempty" toml:"overflow,omitempty"`
 
+	LeadingDiamond  string `json:"leading_diamond,omitempty" toml:"leading_diamond,omitempty"`
+	TrailingDiamond string `json:"trailing_diamond,omitempty" toml:"trailing_diamond,omitempty"`
+
 	// Deprecated: keep the logic for legacy purposes
 	HorizontalOffset int `json:"horizontal_offset,omitempty" toml:"horizontal_offset,omitempty"`
 	VerticalOffset   int `json:"vertical_offset,omitempty" toml:"vertical_offset,omitempty"`
@@ -131,16 +134,22 @@ func (b *Block) setSegmentsText() {
 }
 
 func (b *Block) RenderSegments() (string, int) {
-	for _, segment := range b.Segments {
-		if !segment.Enabled && segment.style() != Accordion {
-			continue
-		}
+	b.filterSegments()
 
+	for i, segment := range b.Segments {
 		if colors, newCycle := cycle.Loop(); colors != nil {
 			cycle = &newCycle
 			segment.colors = colors
 		}
 
+		if i == 0 && len(b.LeadingDiamond) > 0 {
+			segment.LeadingDiamond = b.LeadingDiamond
+		}
+
+		if i == len(b.Segments)-1 && len(b.TrailingDiamond) > 0 {
+			segment.TrailingDiamond = b.TrailingDiamond
+		}
+
 		b.setActiveSegment(segment)
 		b.renderActiveSegment()
 	}
@@ -150,6 +159,20 @@ func (b *Block) RenderSegments() (string, int) {
 	return b.writer.String()
 }
 
+func (b *Block) filterSegments() {
+	segments := make([]*Segment, 0)
+
+	for _, segment := range b.Segments {
+		if !segment.Enabled && segment.style() != Accordion {
+			continue
+		}
+
+		segments = append(segments, segment)
+	}
+
+	b.Segments = segments
+}
+
 func (b *Block) renderActiveSegment() {
 	b.writeSeparator(false)
 	switch b.activeSegment.style() {

themes/schema.json

@@ -262,6 +262,18 @@
           "description": "https://ohmyposh.dev/docs/configuration/block#newline",
           "default": false
         },
+        "leading_diamond": {
+          "type": "string",
+          "title": "Leading diamond",
+          "description": "https://ohmyposh.dev/docs/configuration/block#leading-diamond",
+          "default": ""
+        },
+        "trailing_diamond": {
+          "type": "string",
+          "title": "Trailing diamond",
+          "description": "https://ohmyposh.dev/docs/configuration/block#trailing-diamond",
+          "default": ""
+        },
         "segments": {
           "type": "array",
           "title": "Segments list, prompt elements to display based on context",

website/docs/configuration/block.mdx

@@ -6,30 +6,34 @@ sidebar_label: Block
 
 Let's take a closer look at what defines a block.
 
-import Config from '@site/src/components/Config.js';
+import Config from "@site/src/components/Config.js";
 
-<Config data={{
-  "$schema": "https://raw.githubusercontent.com/JanDeDobbeleer/oh-my-posh/main/themes/schema.json",
-  "blocks": [
-    {
-      "type": "prompt",
-      "alignment": "left",
-      "segments": [
-      ]
-    }
-  ]
-}}/>
+<Config
+  data={{
+    $schema:
+      "https://raw.githubusercontent.com/JanDeDobbeleer/oh-my-posh/main/themes/schema.json",
+    blocks: [
+      {
+        type: "prompt",
+        alignment: "left",
+        segments: [],
+      },
+    ],
+  }}
+/>
 
 ## Properties
 
-| Name        | Type      |
-| ----------- | --------- |
-| `type`      | `string`  |
-| `newline`   | `boolean` |
-| `alignment` | `string`  |
-| `filler`    | `string`  |
-| `overflow`  | `string`  |
-| `segments`  | `array`   |
+| Name               | Type      |
+| ------------------ | --------- |
+| `type`             | `string`  |
+| `newline`          | `boolean` |
+| `alignment`        | `string`  |
+| `filler`           | `string`  |
+| `overflow`         | `string`  |
+| `leading_diamond`  | `string`  |
+| `trailing_diamond` | `string`  |
+| `segments`         | `array`   |
 
 ### Type
 
@@ -71,6 +75,16 @@ to be repeated to this property. Add this property to the _right_ aligned block.
 When the right aligned block is so long it will overflow the left aligned block, the engine will either
 break the block or hide it based on the setting. By default it is printed as is on the same line.
 
+### Leading Diamond
+
+The character to use as a leading diamond for the first segment in case you always want to start the block
+with the same leading diamond, regardless of which segment is enabled or not.
+
+### Trailing Diamond
+
+The character to use as a trailing diamond for the last segment in case you always want to end the block
+with the same trailing diamond, regardless of which segment is enabled or not.
+
 ### Segments
 
 Array of one or more [segments][segment].