Add repo file tree item link behavior (#34730)

Converts the repo file tree items into `<a>` elements to have default
link behavior. Dynamic content load is still done when no special key is
pressed while clicking on an item.

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

web_src/js/components/ViewFileTreeStore.ts

@@ -0,0 +1,44 @@
+import {reactive} from 'vue';
+import {GET} from '../modules/fetch.ts';
+import {pathEscapeSegments} from '../utils/url.ts';
+import {createElementFromHTML} from '../utils/dom.ts';
+
+export function createViewFileTreeStore(props: { repoLink: string, treePath: string, currentRefNameSubURL: string}) {
+  const store = reactive({
+    rootFiles: [],
+    selectedItem: props.treePath,
+
+    async loadChildren(treePath: string, subPath: string = '') {
+      const response = await GET(`${props.repoLink}/tree-view/${props.currentRefNameSubURL}/${pathEscapeSegments(treePath)}?sub_path=${encodeURIComponent(subPath)}`);
+      const json = await response.json();
+      const poolSvgs = [];
+      for (const [svgId, svgContent] of Object.entries(json.renderedIconPool ?? {})) {
+        if (!document.querySelector(`.global-svg-icon-pool #${svgId}`)) poolSvgs.push(svgContent);
+      }
+      if (poolSvgs.length) {
+        const svgContainer = createElementFromHTML('<div class="global-svg-icon-pool tw-hidden"></div>');
+        svgContainer.innerHTML = poolSvgs.join('');
+        document.body.append(svgContainer);
+      }
+      return json.fileTreeNodes ?? null;
+    },
+
+    async loadViewContent(url: string) {
+      url = url.includes('?') ? url.replace('?', '?only_content=true') : `${url}?only_content=true`;
+      const response = await GET(url);
+      document.querySelector('.repo-view-content').innerHTML = await response.text();
+    },
+
+    async navigateTreeView(treePath: string) {
+      const url = store.buildTreePathWebUrl(treePath);
+      window.history.pushState({treePath, url}, null, url);
+      store.selectedItem = treePath;
+      await store.loadViewContent(url);
+    },
+
+    buildTreePathWebUrl(treePath: string) {
+      return `${props.repoLink}/src/${props.currentRefNameSubURL}/${pathEscapeSegments(treePath)}`;
+    },
+  });
+  return store;
+}