fix: prevent code input content from being obscured in fullscreen mode (#7599)

#### What type of PR is this?

/area ui
/kind bug
/milestone 2.21.x

#### What this PR does / why we need it:

Prevent code input content from being obscured in fullscreen mode

#### Which issue(s) this PR fixes:

Fixes https://github.com/halo-dev/halo/issues/7574

#### Does this PR introduce a user-facing change?

```release-note
修复代码输入框在全屏时，底部内容被遮挡的问题。
```

ui/src/components/codemirror/Codemirror.vue

@@ -6,7 +6,7 @@ import { json } from "@codemirror/lang-json";
 import { LanguageSupport, StreamLanguage } from "@codemirror/language";
 import { yaml } from "@codemirror/legacy-modes/mode/yaml";
 import type { EditorStateConfig } from "@codemirror/state";
-import { EditorState } from "@codemirror/state";
+import { Compartment, EditorState } from "@codemirror/state";
 import { EditorView } from "@codemirror/view";
 import { basicSetup } from "codemirror";
 import { onBeforeUnmount, onMounted, shallowRef, watch } from "vue";
@@ -42,17 +42,21 @@ const emit = defineEmits<{
   (e: "change", value: string): void;
 }>();
 
-const customTheme = EditorView.theme({
-  "&": {
-    height: props.height,
-    width: "100%",
-  },
-});
-
 const wrapper = shallowRef<HTMLDivElement>();
 const cmState = shallowRef<EditorState>();
 const cmView = shallowRef<EditorView>();
 
+const themeCompartment = new Compartment();
+
+const createCustomTheme = (height: string) => {
+  return EditorView.theme({
+    "&": {
+      height,
+      width: "100%",
+    },
+  });
+};
+
 const createCmEditor = () => {
   const language =
     typeof props.language === "string"
@@ -62,7 +66,7 @@ const createCmEditor = () => {
   let extensions = [
     basicSetup,
     EditorView.lineWrapping,
-    customTheme,
+    themeCompartment.of(createCustomTheme(props.height)),
     language,
     EditorView.updateListener.of((viewUpdate) => {
       if (viewUpdate.docChanged) {
@@ -106,6 +110,17 @@ onMounted(() => {
       }
     }
   );
+
+  watch(
+    () => props.height,
+    (newHeight) => {
+      if (cmView.value) {
+        cmView.value.dispatch({
+          effects: themeCompartment.reconfigure(createCustomTheme(newHeight)),
+        });
+      }
+    }
+  );
 });
 
 // Destroy codemirror editor when component unmounts

ui/src/formkit/inputs/code/CodeInput.vue

@@ -31,6 +31,15 @@ useEventListener(codeInputWrapperRef, "keydown", (e: KeyboardEvent) => {
     fullscreen.value = false;
   }
 });
+
+const editorHeight = computed(() => {
+  if (fullscreen.value) {
+    // VPageHeader height is 3.5rem
+    return "calc(100vh - 3.5rem)";
+  }
+
+  return "100%";
+});
 </script>
 
 <template>
@@ -52,7 +61,7 @@ useEventListener(codeInputWrapperRef, "keydown", (e: KeyboardEvent) => {
       <VCodemirror
         :model-value="props.context._value"
         v-bind="context.attrs"
-        height="100%"
+        :height="editorHeight"
         :language="language"
         class="block w-full"
         @change="onChange"
@@ -62,6 +71,7 @@ useEventListener(codeInputWrapperRef, "keydown", (e: KeyboardEvent) => {
         v-if="!fullscreen"
         v-tooltip="$t('core.formkit.code.fullscreen.enter')"
         class="absolute bottom-2 right-2 inline-flex cursor-pointer items-center justify-center rounded-full bg-primary p-1.5 text-white opacity-0 transition-all hover:!opacity-90 hover:shadow group-hover:opacity-100"
+        type="button"
         @click="fullscreen = true"
       >
         <RiFullscreenLine class="text-xs" />