Rollup merge of #130619 - GuillaumeGomez:scraped-examples-height, r=notriddle

Fix scraped examples height

Fixes [#130562](https://github.com/rust-lang/rust/issues/130562).

You can test it [here](https://rustdoc.crud.net/imperio/scraped-examples-height/doc/scrape_examples/fn.test_many.html).

I also used this opportunity to reduce the padding on line numbers:

| before | after |
| - | - |
| ![Screenshot from 2024-09-20 16-20-40](https://github.com/user-attachments/assets/9434704c-afe0-4ec3-a1dc-6f3c16d03b3b) | ![Screenshot from 2024-09-20 16-20-13](https://github.com/user-attachments/assets/f3bd01bf-760a-4acd-ba34-8e7db083245a) |

r? `@notriddle`

src/librustdoc/html/static/css/rustdoc.css

@@ -801,6 +801,9 @@ both the code example and the line numbers, so we need to remove the radius in t
 	 * and we include additional 10px for padding. */
 	max-height: calc(1.5em * 5 + 10px);
 }
+.more-scraped-examples .scraped-example:not(.expanded) .example-wrap {
+	max-height: calc(1.5em * 10 + 10px);
+}
 
 .rustdoc:not(.src) .scraped-example:not(.expanded) .src-line-numbers,
 .rustdoc:not(.src) .scraped-example:not(.expanded) .src-line-numbers > pre,
@@ -828,10 +831,14 @@ both the code example and the line numbers, so we need to remove the radius in t
 	-webkit-user-select: none;
 	user-select: none;
 	padding: 14px 8px;
+	padding-right: 2px;
 	color: var(--src-line-numbers-span-color);
 }
 
-.rustdoc .scraped-example .src-line-numbers {
+.rustdoc .scraped-example .example-wrap .src-line-numbers {
+	padding: 0;
+}
+.rustdoc .src-line-numbers pre {
 	padding: 14px 0;
 }
 .src-line-numbers a, .src-line-numbers span {
@@ -890,7 +897,7 @@ both the code example and the line numbers, so we need to remove the radius in t
 }
 
 .docblock code, .docblock-short code,
-pre, .rustdoc.src .example-wrap {
+pre, .rustdoc.src .example-wrap, .example-wrap .src-line-numbers {
 	background-color: var(--code-block-background-color);
 }
 

tests/rustdoc-gui/docblock-code-block-line-number.goml

@@ -39,7 +39,10 @@ define-function: (
             {
                 "color": |color|,
                 "margin": "0px",
-                "padding": "14px 8px",
+                "padding-top": "14px",
+                "padding-bottom": "14px",
+                "padding-left": "8px",
+                "padding-right": "2px",
                 "text-align": "right",
                 // There should not be a radius on the right of the line numbers.
                 "border-top-left-radius": "6px",
@@ -141,3 +144,61 @@ assert-css: (
     },
     ALL,
 )
+
+// Checking line numbers on scraped code examples.
+go-to: "file://" + |DOC_PATH| + "/scrape_examples/fn.test_many.html"
+
+define-function: (
+    "check-padding",
+    [path, padding_bottom],
+    block {
+        assert-css: (|path| + " .src-line-numbers", {
+            "padding-top": "0px",
+            "padding-bottom": "0px",
+            "padding-left": "0px",
+            "padding-right": "0px",
+        })
+        assert-css: (|path| + " .src-line-numbers > pre", {
+            "padding-top": "14px",
+            "padding-bottom": |padding_bottom|,
+            "padding-left": "0px",
+            "padding-right": "0px",
+        })
+        assert-css: (|path| + " .src-line-numbers > pre > span", {
+            "padding-top": "0px",
+            "padding-bottom": "0px",
+            "padding-left": "8px",
+            "padding-right": "8px",
+        })
+    },
+)
+
+call-function: ("check-padding", {
+    "path": ".scraped-example .example-wrap",
+    "padding_bottom": "0px",
+})
+
+move-cursor-to: ".scraped-example .example-wrap .rust"
+wait-for: ".scraped-example .example-wrap .button-holder .expand"
+click: ".scraped-example .example-wrap .button-holder .expand"
+wait-for: ".scraped-example.expanded"
+
+call-function: ("check-padding", {
+    "path": ".scraped-example.expanded .example-wrap",
+    "padding_bottom": "14px",
+})
+
+// Now checking the line numbers in the source code page.
+click: ".src"
+assert-css: (".src-line-numbers", {
+    "padding-top": "20px",
+    "padding-bottom": "20px",
+    "padding-left": "4px",
+    "padding-right": "0px",
+})
+assert-css: (".src-line-numbers > a", {
+    "padding-top": "0px",
+    "padding-bottom": "0px",
+    "padding-left": "8px",
+    "padding-right": "8px",
+})

tests/rustdoc-gui/scrape-examples-layout.goml

@@ -37,6 +37,7 @@ assert-property: (
 
 // The "title" should be located at the right bottom corner of the code example.
 store-position: (".scraped-example .example-wrap", {"x": x, "y": y})
+assert-size: (".scraped-example .example-wrap", {"height": 130})
 store-size: (".scraped-example .example-wrap", {"width": width, "height": height})
 store-size: (".scraped-example .scraped-example-title", {
     "width": title_width,
@@ -47,6 +48,13 @@ assert-position: (".scraped-example .scraped-example-title", {
     "y": |y| + |height| - |title_height| - 8,
 })
 
+store-size: (".more-scraped-examples .scraped-example .example-wrap", {"height": more_height})
+assert: |more_height| > |height|
+assert-size: (".more-scraped-examples .scraped-example .example-wrap", {
+    "height": 250,
+    "width": |width|,
+})
+
 // Check that the expand button works and also that line number aligns with code.
 move-cursor-to: ".scraped-example .rust"
 click: ".scraped-example .button-holder .expand"