git-branches-dashboard: extract "checkout selected branch" action from branches tree double-click handler

This will add ability to assign custom shortcut to this action or remove shortcut and completely disable such behavior if needed.

GitOrigin-RevId: b493e7eae23eda5fad8c6f8e52c04d692b4e2771

plugins/git4idea/resources/META-INF/plugin.xml

@@ -45,6 +45,9 @@
     <action id="Git.Uncommit" class="git4idea.reset.GitUncommitAction"/>
     <action id="Git.Reword.Commit" class="git4idea.rebase.GitRewordAction"/>
     <action id="Git.Rename.Local.Branch" class="git4idea.ui.branch.dashboard.BranchesDashboardActions$RenameLocalBranch"/>
+    <action id="Git.Checkout.Branch" class="git4idea.ui.branch.dashboard.BranchesDashboardActions$CheckoutSelectedBranchAction">
+      <mouse-shortcut keymap="$default" keystroke="button1 doubleClick"/>
+    </action>
     <action id="Git.Fixup.To.Commit" class="git4idea.rebase.GitCommitFixupBySubjectAction"/>
     <action id="Git.Squash.Into.Commit" class="git4idea.rebase.GitCommitSquashBySubjectAction"/>
     <action id="Git.Interactive.Rebase" class="git4idea.rebase.GitInteractiveRebaseAction"/>

plugins/git4idea/resources/messages/GitBundle.properties

@@ -278,6 +278,8 @@ action.Git.Fixup.To.Commit.text=Fixup...
 action.Git.Fixup.To.Commit.description=Create a fixup commit
 action.Git.Rename.Local.Branch.text=Rename...
 action.Git.Rename.Local.Branch.description=Rename a local branch
+action.Git.Checkout.Branch.text=Checkout Selected...
+action.Git.Checkout.Branch.description=Checkout selected branch
 action.Git.Reword.Commit.text=Edit Commit Message...
 action.Git.Reword.Commit.description=Change commit message via reword option of git rebase or amend
 action.Git.Uncommit.text=Undo Commit...

plugins/git4idea/src/git4idea/ui/branch/dashboard/BranchesDashboardActions.kt

@@ -316,20 +316,25 @@ internal object BranchesDashboardActions {
     }
   }
 
-  object CheckoutLocalBranchOnDoubleClickHandler {
-    fun install(project: Project, treeComponent: BranchesTreeComponent) {
-      treeComponent.doubleClickHandler = { clickedNode -> doCheckout(clickedNode, project) }
+  class CheckoutSelectedBranchAction : BranchesActionBase() {
+
+    override fun update(e: AnActionEvent, project: Project, branches: Collection<BranchInfo>) {
+      if (branches.size > 1) {
+        e.presentation.isEnabled = false
+        return
+      }
     }
 
-    private fun doCheckout(clickedNode: BranchTreeNode, project: Project) {
-      val branchInfo = clickedNode.getNodeDescriptor().branchInfo ?: return
-      if (branchInfo.isLocal) {
+    override fun actionPerformed(e: AnActionEvent) {
+      val project = e.project!!
+      val branch = e.getData(GIT_BRANCHES)!!.firstOrNull() ?: return
+      if (branch.isLocal) {
         GitBranchPopupActions.LocalBranchActions.CheckoutAction
-          .checkoutBranch(project, branchInfo.repositories, branchInfo.branchName)
+          .checkoutBranch(project, branch.repositories, branch.branchName)
       }
       else {
         GitBranchPopupActions.RemoteBranchActions.CheckoutRemoteBranchAction
-          .checkoutRemoteBranch(project, branchInfo.repositories, branchInfo.branchName)
+          .checkoutRemoteBranch(project, branch.repositories, branch.branchName)
       }
     }
   }

plugins/git4idea/src/git4idea/ui/branch/dashboard/BranchesDashboardUi.kt

@@ -38,7 +38,6 @@ import com.intellij.vcs.log.ui.frame.VcsLogChangeProcessor
 import com.intellij.vcs.log.visible.VisiblePackRefresher
 import com.intellij.vcs.log.visible.VisiblePackRefresherImpl
 import com.intellij.vcs.log.visible.filters.VcsLogFilterObject
-import git4idea.ui.branch.dashboard.BranchesDashboardActions.CheckoutLocalBranchOnDoubleClickHandler
 import git4idea.ui.branch.dashboard.BranchesDashboardActions.DeleteBranchAction
 import git4idea.ui.branch.dashboard.BranchesDashboardActions.FetchAction
 import git4idea.ui.branch.dashboard.BranchesDashboardActions.GroupByDirectoryAction
@@ -121,7 +120,6 @@ internal class BranchesDashboardUi(val project: Project) : Disposable {
   }
 
   private fun initMainUi() {
-    CheckoutLocalBranchOnDoubleClickHandler.install(project, tree.component)
     val diffAction = ShowBranchDiffAction()
     diffAction.registerCustomShortcutSet(KeymapUtil.getActiveKeymapShortcuts("Diff.ShowDiff"), branchesTreeWithLogPanel)