Refactor branch/tag selector to Vue SFC (#23421)

Follow #23394

There were many bad smells in old code. This PR only moves the code into
Vue SFC, doesn't touch the unrelated logic.

update: after
https://github.com/go-gitea/gitea/pull/23421/commits/5f23218c851e12132f538a404c946bbf6ff38e62
, there should be no usage of the vue-rumtime-compiler anymore
(hopefully), so I think this PR could close #19851

---------

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

4 files changed, 298 insertions, 212 deletions

diff --git a/web_src/js/components/DashboardRepoList.vue b/web_src/js/components/DashboardRepoList.vue
index e295910fd0..cc76ab627f 100644
--- a/web_src/js/components/DashboardRepoList.vue
+++ b/web_src/js/components/DashboardRepoList.vue
@@ -73,7 +73,7 @@
           <li v-for="repo in repos" :class="{'private': repo.private || repo.internal}" :key="repo.id">
             <a class="repo-list-link gt-df gt-ac gt-sb" :href="repo.link">
               <div class="item-name gt-df gt-ac gt-f1 gt-mr-2">
-                <svg-icon :name="repoIcon(repo)" size="16" class-name="gt-mr-2"/>
+                <svg-icon :name="repoIcon(repo)" :size="16" class-name="gt-mr-2"/>
                 <div class="text gt-bold truncate gt-ml-1">{{ repo.full_name }}</div>
                 <span v-if="repo.archived">
                   <svg-icon name="octicon-archive" :size="16" class-name="gt-ml-2"/>
diff --git a/web_src/js/components/PullRequestMergeForm.vue b/web_src/js/components/PullRequestMergeForm.vue
index fc610d2194..4d8c14a76d 100644
--- a/web_src/js/components/PullRequestMergeForm.vue
+++ b/web_src/js/components/PullRequestMergeForm.vue
@@ -10,8 +10,8 @@
       -d '{"context": "test/context", "description": "description", "state": "${state}", "target_url": "http://localhost"}'
   -->
   <div>
-    <!-- eslint-disable -->
-    <div v-if="mergeForm.hasPendingPullRequestMerge" v-html="mergeForm.hasPendingPullRequestMergeTip" class="ui info message"></div>
+    <!-- eslint-disable-next-line vue/no-v-html -->
+    <div v-if="mergeForm.hasPendingPullRequestMerge" v-html="mergeForm.hasPendingPullRequestMergeTip" class="ui info message"/>
 
     <div class="ui form" v-if="showActionForm">
       <form :action="mergeForm.baseLink+'/merge'" method="post">
@@ -30,7 +30,8 @@
               <button @click.prevent="clearMergeMessage" class="ui tertiary button">
                 {{ mergeForm.textClearMergeMessage }}
               </button>
-              <div class="ui label"><!-- TODO: Convert to tooltip once we can use tooltips in Vue templates -->
+              <div class="ui label">
+                <!-- TODO: Convert to tooltip once we can use tooltips in Vue templates -->
                 {{ mergeForm.textClearMergeMessageHint }}
               </div>
             </template>
diff --git a/web_src/js/components/RepoBranchTagDropdown.js b/web_src/js/components/RepoBranchTagDropdown.js
deleted file mode 100644
index a8945b82d1..0000000000
--- a/web_src/js/components/RepoBranchTagDropdown.js
+++ /dev/null
@@ -1,208 +0,0 @@
-import {createApp, nextTick} from 'vue';
-import $ from 'jquery';
-
-export function initRepoBranchTagDropdown(selector) {
-  $(selector).each(function (dropdownIndex, elRoot) {
-    const data = {
-      csrfToken: window.config.csrfToken,
-      items: [],
-      searchTerm: '',
-      menuVisible: false,
-      createTag: false,
-      release: null,
-
-      isViewTag: false,
-      isViewBranch: false,
-      isViewTree: false,
-
-      active: 0,
-
-      ...window.config.pageData.branchDropdownDataList[dropdownIndex],
-    };
-
-    // the "data.defaultBranch" is ambiguous, it could be "branch name" or "tag name"
-
-    if (data.showBranchesInDropdown && data.branches) {
-      for (const branch of data.branches) {
-        data.items.push({name: branch, url: branch, branch: true, tag: false, selected: branch === data.defaultBranch});
-      }
-    }
-    if (!data.noTag && data.tags) {
-      for (const tag of data.tags) {
-        if (data.release) {
-          data.items.push({name: tag, url: tag, branch: false, tag: true, selected: tag === data.release.tagName});
-        } else {
-          data.items.push({name: tag, url: tag, branch: false, tag: true, selected: tag === data.defaultBranch});
-        }
-      }
-    }
-
-    const view = createApp({
-      delimiters: ['${', '}'],
-      data() {
-        return data;
-      },
-      computed: {
-        filteredItems() {
-          const items = this.items.filter((item) => {
-            return ((this.mode === 'branches' && item.branch) || (this.mode === 'tags' && item.tag)) &&
-              (!this.searchTerm || item.name.toLowerCase().includes(this.searchTerm.toLowerCase()));
-          });
-
-          // no idea how to fix this so linting rule is disabled instead
-          this.active = (items.length === 0 && this.showCreateNewBranch ? 0 : -1); // eslint-disable-line vue/no-side-effects-in-computed-properties
-          return items;
-        },
-        showNoResults() {
-          return this.filteredItems.length === 0 && !this.showCreateNewBranch;
-        },
-        showCreateNewBranch() {
-          if (this.disableCreateBranch || !this.searchTerm) {
-            return false;
-          }
-
-          return this.items.filter((item) => item.name.toLowerCase() === this.searchTerm.toLowerCase()).length === 0;
-        }
-      },
-
-      watch: {
-        menuVisible(visible) {
-          if (visible) {
-            this.focusSearchField();
-          }
-        }
-      },
-
-      beforeMount() {
-        switch (data.viewType) {
-          case 'tree':
-            this.isViewTree = true;
-            break;
-          case 'tag':
-            this.isViewTag = true;
-            break;
-          default:
-            this.isViewBranch = true;
-            break;
-        }
-
-        document.body.addEventListener('click', (event) => {
-          if (elRoot.contains(event.target)) return;
-          if (this.menuVisible) {
-            this.menuVisible = false;
-          }
-        });
-      },
-
-      methods: {
-        selectItem(item) {
-          const prev = this.getSelected();
-          if (prev !== null) {
-            prev.selected = false;
-          }
-          item.selected = true;
-          const url = (item.tag) ? this.tagURLPrefix + item.url + this.tagURLSuffix : this.branchURLPrefix + item.url + this.branchURLSuffix;
-          if (!this.branchForm) {
-            window.location.href = url;
-          } else {
-            this.isViewTree = false;
-            this.isViewTag = false;
-            this.isViewBranch = false;
-            this.$refs.dropdownRefName.textContent = item.name;
-            if (this.setAction) {
-              $(`#${this.branchForm}`).attr('action', url);
-            } else {
-              $(`#${this.branchForm} input[name="refURL"]`).val(url);
-            }
-            $(`#${this.branchForm} input[name="ref"]`).val(item.name);
-            if (item.tag) {
-              this.isViewTag = true;
-              $(`#${this.branchForm} input[name="refType"]`).val('tag');
-            } else {
-              this.isViewBranch = true;
-              $(`#${this.branchForm} input[name="refType"]`).val('branch');
-            }
-            if (this.submitForm) {
-              $(`#${this.branchForm}`).trigger('submit');
-            }
-            this.menuVisible = false;
-          }
-        },
-        createNewBranch() {
-          if (!this.showCreateNewBranch) return;
-          $(this.$refs.newBranchForm).trigger('submit');
-        },
-        focusSearchField() {
-          nextTick(() => {
-            this.$refs.searchField.focus();
-          });
-        },
-        getSelected() {
-          for (let i = 0, j = this.items.length; i < j; ++i) {
-            if (this.items[i].selected) return this.items[i];
-          }
-          return null;
-        },
-        getSelectedIndexInFiltered() {
-          for (let i = 0, j = this.filteredItems.length; i < j; ++i) {
-            if (this.filteredItems[i].selected) return i;
-          }
-          return -1;
-        },
-        scrollToActive() {
-          let el = this.$refs[`listItem${this.active}`];
-          if (!el || !el.length) return;
-          if (Array.isArray(el)) {
-            el = el[0];
-          }
-
-          const cont = this.$refs.scrollContainer;
-          if (el.offsetTop < cont.scrollTop) {
-            cont.scrollTop = el.offsetTop;
-          } else if (el.offsetTop + el.clientHeight > cont.scrollTop + cont.clientHeight) {
-            cont.scrollTop = el.offsetTop + el.clientHeight - cont.clientHeight;
-          }
-        },
-        keydown(event) {
-          if (event.keyCode === 40) { // arrow down
-            event.preventDefault();
-
-            if (this.active === -1) {
-              this.active = this.getSelectedIndexInFiltered();
-            }
-
-            if (this.active + (this.showCreateNewBranch ? 0 : 1) >= this.filteredItems.length) {
-              return;
-            }
-            this.active++;
-            this.scrollToActive();
-          } else if (event.keyCode === 38) { // arrow up
-            event.preventDefault();
-
-            if (this.active === -1) {
-              this.active = this.getSelectedIndexInFiltered();
-            }
-
-            if (this.active <= 0) {
-              return;
-            }
-            this.active--;
-            this.scrollToActive();
-          } else if (event.keyCode === 13) { // enter
-            event.preventDefault();
-
-            if (this.active >= this.filteredItems.length) {
-              this.createNewBranch();
-            } else if (this.active >= 0) {
-              this.selectItem(this.filteredItems[this.active]);
-            }
-          } else if (event.keyCode === 27) { // escape
-            event.preventDefault();
-            this.menuVisible = false;
-          }
-        }
-      }
-    });
-    view.mount(this);
-  });
-}
diff --git a/web_src/js/components/RepoBranchTagSelector.vue b/web_src/js/components/RepoBranchTagSelector.vue
new file mode 100644
index 0000000000..6a65eeec6f
--- /dev/null
+++ b/web_src/js/components/RepoBranchTagSelector.vue
@@ -0,0 +1,293 @@
+<template>
+  <div class="ui floating filter dropdown custom">
+    <button class="branch-dropdown-button gt-ellipsis ui basic small compact button gt-df" @click="menuVisible = !menuVisible" @keyup.enter="menuVisible = !menuVisible">
+      <span class="text gt-df gt-ac gt-mr-2">
+        <template v-if="release">{{ textReleaseCompare }}</template>
+        <template v-else>
+          <svg-icon v-if="isViewTag" name="octicon-tag" />
+          <svg-icon v-else name="octicon-git-branch"/>
+          <strong ref="dropdownRefName" class="gt-ml-3">{{ refNameText }}</strong>
+        </template>
+      </span>
+      <svg-icon name="octicon-triangle-down" :size="14" class-name="dropdown icon"/>
+    </button>
+    <div class="menu transition" :class="{visible: menuVisible}" v-if="menuVisible" v-cloak>
+      <div class="ui icon search input">
+        <i class="icon gt-df gt-ac gt-jc gt-m-0"><svg-icon name="octicon-filter" :size="16"/></i>
+        <input name="search" ref="searchField" autocomplete="off" v-model="searchTerm" @keydown="keydown($event)" :placeholder="searchFieldPlaceholder">
+      </div>
+      <template v-if="showBranchesInDropdown">
+        <div class="header branch-tag-choice">
+          <div class="ui grid">
+            <div class="two column row">
+              <a class="reference column" href="#" @click="createTag = false; mode = 'branches'; focusSearchField()">
+                <span class="text" :class="{black: mode === 'branches'}">
+                  <svg-icon name="octicon-git-branch" :size="16" class-name="gt-mr-2"/>{{ textBranches }}
+                </span>
+              </a>
+              <template v-if="!noTag">
+                <a class="reference column" href="#" @click="createTag = true; mode = 'tags'; focusSearchField()">
+                  <span class="text" :class="{black: mode === 'tags'}">
+                    <svg-icon name="octicon-tag" :size="16" class-name="gt-mr-2"/>{{ textTags }}
+                  </span>
+                </a>
+              </template>
+            </div>
+          </div>
+        </div>
+      </template>
+      <div class="scrolling menu" ref="scrollContainer">
+        <div v-for="(item, index) in filteredItems" :key="item.name" class="item" :class="{selected: item.selected, active: active === index}" @click="selectItem(item)" :ref="'listItem' + index">
+          {{ item.name }}
+        </div>
+        <div class="item" v-if="showCreateNewBranch" :class="{active: active === filteredItems.length}" :ref="'listItem' + filteredItems.length">
+          <a href="#" @click="createNewBranch()">
+            <div v-show="createTag">
+              <i class="reference tags icon"/>
+              <!-- eslint-disable-next-line vue/no-v-html -->
+              <span v-html="textCreateTag.replace('%s', searchTerm)"/>
+            </div>
+            <div v-show="!createTag">
+              <svg-icon name="octicon-git-branch"/>
+              <!-- eslint-disable-next-line vue/no-v-html -->
+              <span v-html="textCreateBranch.replace('%s', searchTerm)"/>
+            </div>
+            <div class="text small">
+              <span v-if="isViewBranch || release">{{ textCreateBranchFrom.replace('%s', branchName) }}</span>
+              <span v-else-if="isViewTag">{{ textCreateBranchFrom.replace('%s', tagName) }}</span>
+              <span v-else>{{ textCreateBranchFrom.replace('%s', commitIdShort) }}</span>
+            </div>
+          </a>
+          <form ref="newBranchForm" :action="formActionUrl" method="post">
+            <input type="hidden" name="_csrf" :value="csrfToken">
+            <input type="hidden" name="new_branch_name" v-model="searchTerm">
+            <input type="hidden" name="create_tag" v-model="createTag">
+            <input type="hidden" name="current_path" v-model="treePath" v-if="treePath">
+          </form>
+        </div>
+      </div>
+      <div class="message" v-if="showNoResults">
+        {{ noResults }}
+      </div>
+    </div>
+  </div>
+</template>
+
+<script>
+import {createApp, nextTick} from 'vue';
+import $ from 'jquery';
+import {SvgIcon} from '../svg.js';
+import {pathEscapeSegments} from '../utils/url.js';
+
+const sfc = {
+  components: {SvgIcon},
+
+  // no `data()`, at the moment, the `data()` is provided by the init code, which is not ideal and should be fixed in the future
+
+  computed: {
+    filteredItems() {
+      const items = this.items.filter((item) => {
+        return ((this.mode === 'branches' && item.branch) || (this.mode === 'tags' && item.tag)) &&
+          (!this.searchTerm || item.name.toLowerCase().includes(this.searchTerm.toLowerCase()));
+      });
+
+      // TODO: fix this anti-pattern: side-effects-in-computed-properties
+      this.active = (items.length === 0 && this.showCreateNewBranch ? 0 : -1);
+      return items;
+    },
+    showNoResults() {
+      return this.filteredItems.length === 0 && !this.showCreateNewBranch;
+    },
+    showCreateNewBranch() {
+      if (this.disableCreateBranch || !this.searchTerm) {
+        return false;
+      }
+      return this.items.filter((item) => item.name.toLowerCase() === this.searchTerm.toLowerCase()).length === 0;
+    },
+    formActionUrl() {
+      return `${this.repoLink}/branches/_new/${pathEscapeSegments(this.branchNameSubURL)}`;
+    },
+  },
+
+  watch: {
+    menuVisible(visible) {
+      if (visible) {
+        this.focusSearchField();
+      }
+    }
+  },
+
+  beforeMount() {
+    if (this.viewType === 'tree') {
+      this.isViewTree = true;
+      this.refNameText = this.commitIdShort;
+    } else if (this.viewType === 'tag') {
+      this.isViewTag = true;
+      this.refNameText = this.tagName;
+    } else {
+      this.isViewBranch = true;
+      this.refNameText = this.branchName;
+    }
+
+    document.body.addEventListener('click', (event) => {
+      if (this.$el.contains(event.target)) return;
+      if (this.menuVisible) {
+        this.menuVisible = false;
+      }
+    });
+  },
+
+  methods: {
+    selectItem(item) {
+      const prev = this.getSelected();
+      if (prev !== null) {
+        prev.selected = false;
+      }
+      item.selected = true;
+      const url = (item.tag) ? this.tagURLPrefix + item.url + this.tagURLSuffix : this.branchURLPrefix + item.url + this.branchURLSuffix;
+      if (!this.branchForm) {
+        window.location.href = url;
+      } else {
+        this.isViewTree = false;
+        this.isViewTag = false;
+        this.isViewBranch = false;
+        this.$refs.dropdownRefName.textContent = item.name;
+        if (this.setAction) {
+          $(`#${this.branchForm}`).attr('action', url);
+        } else {
+          $(`#${this.branchForm} input[name="refURL"]`).val(url);
+        }
+        $(`#${this.branchForm} input[name="ref"]`).val(item.name);
+        if (item.tag) {
+          this.isViewTag = true;
+          $(`#${this.branchForm} input[name="refType"]`).val('tag');
+        } else {
+          this.isViewBranch = true;
+          $(`#${this.branchForm} input[name="refType"]`).val('branch');
+        }
+        if (this.submitForm) {
+          $(`#${this.branchForm}`).trigger('submit');
+        }
+        this.menuVisible = false;
+      }
+    },
+    createNewBranch() {
+      if (!this.showCreateNewBranch) return;
+      $(this.$refs.newBranchForm).trigger('submit');
+    },
+    focusSearchField() {
+      nextTick(() => {
+        this.$refs.searchField.focus();
+      });
+    },
+    getSelected() {
+      for (let i = 0, j = this.items.length; i < j; ++i) {
+        if (this.items[i].selected) return this.items[i];
+      }
+      return null;
+    },
+    getSelectedIndexInFiltered() {
+      for (let i = 0, j = this.filteredItems.length; i < j; ++i) {
+        if (this.filteredItems[i].selected) return i;
+      }
+      return -1;
+    },
+    scrollToActive() {
+      let el = this.$refs[`listItem${this.active}`];
+      if (!el || !el.length) return;
+      if (Array.isArray(el)) {
+        el = el[0];
+      }
+
+      const cont = this.$refs.scrollContainer;
+      if (el.offsetTop < cont.scrollTop) {
+        cont.scrollTop = el.offsetTop;
+      } else if (el.offsetTop + el.clientHeight > cont.scrollTop + cont.clientHeight) {
+        cont.scrollTop = el.offsetTop + el.clientHeight - cont.clientHeight;
+      }
+    },
+    keydown(event) {
+      if (event.keyCode === 40) { // arrow down
+        event.preventDefault();
+
+        if (this.active === -1) {
+          this.active = this.getSelectedIndexInFiltered();
+        }
+
+        if (this.active + (this.showCreateNewBranch ? 0 : 1) >= this.filteredItems.length) {
+          return;
+        }
+        this.active++;
+        this.scrollToActive();
+      } else if (event.keyCode === 38) { // arrow up
+        event.preventDefault();
+
+        if (this.active === -1) {
+          this.active = this.getSelectedIndexInFiltered();
+        }
+
+        if (this.active <= 0) {
+          return;
+        }
+        this.active--;
+        this.scrollToActive();
+      } else if (event.keyCode === 13) { // enter
+        event.preventDefault();
+
+        if (this.active >= this.filteredItems.length) {
+          this.createNewBranch();
+        } else if (this.active >= 0) {
+          this.selectItem(this.filteredItems[this.active]);
+        }
+      } else if (event.keyCode === 27) { // escape
+        event.preventDefault();
+        this.menuVisible = false;
+      }
+    }
+  }
+};
+
+export function initRepoBranchTagSelector(selector) {
+  for (const [elIndex, elRoot] of document.querySelectorAll(selector).entries()) {
+    const data = {
+      csrfToken: window.config.csrfToken,
+      items: [],
+      searchTerm: '',
+      refNameText: '',
+      menuVisible: false,
+      createTag: false,
+      release: null,
+
+      isViewTag: false,
+      isViewBranch: false,
+      isViewTree: false,
+
+      active: 0,
+
+      ...window.config.pageData.branchDropdownDataList[elIndex],
+    };
+
+    // the "data.defaultBranch" is ambiguous, it could be "branch name" or "tag name"
+
+    if (data.showBranchesInDropdown && data.branches) {
+      for (const branch of data.branches) {
+        data.items.push({name: branch, url: branch, branch: true, tag: false, selected: branch === data.defaultBranch});
+      }
+    }
+    if (!data.noTag && data.tags) {
+      for (const tag of data.tags) {
+        if (data.release) {
+          data.items.push({name: tag, url: tag, branch: false, tag: true, selected: tag === data.release.tagName});
+        } else {
+          data.items.push({name: tag, url: tag, branch: false, tag: true, selected: tag === data.defaultBranch});
+        }
+      }
+    }
+
+    const comp = {...sfc, data() { return data }};
+    createApp(comp).mount(elRoot);
+  }
+}
+
+export default sfc; // activate IDE's Vue plugin
+</script>