Support title and body query parameters for new PRs

routers/web/repo/compare.go

@@ -577,6 +577,22 @@
 	ctx.Data["AfterCommitID"] = headCommitID
 	ctx.Data["ExpandNewPrForm"] = ctx.FormBool("expand")
 
+	formTitle := ctx.FormString("title")
+	formBody := ctx.FormString("body")
+	quickPull := ctx.FormBool("quick_pull")
+
+	if formTitle != "" {
+		ctx.Data["TitleQuery"] = formTitle
+    }
+
+	if formBody != "" {
+		ctx.Data["BodyQuery"] = formBody
+    }
+
+	if ctx.Data["ExpandNewPrForm"] != true && (quickPull || formTitle != "" || formBody != "") {
+		ctx.Data["ExpandNewPrForm"] = true
+    }
+
 	if (headCommitID == ci.CompareInfo.MergeBase && !ci.DirectComparison) ||
 		headCommitID == ci.CompareInfo.BaseCommitID {
 		ctx.Data["IsNothingToCompare"] = true
@@ -804,6 +820,21 @@
 			if ctx.Written() {
 				return
 			}
+
+			title := ctx.FormString("title")
+			body := ctx.FormString("body")
+			expandNewPRForm := ctx.FormBool("quick_pull")
+
+			if title != "" {
+				ctx.Data["TitleQuery"] = title
+			}
+			if body != "" {
+				ctx.Data["BodyQuery"] = body
+			}
+			if expandNewPRForm || title != "" || body != "" {
+				ctx.Data["ExpandNewPrForm"] = true
+			}
+
 			_, templateErrs := setTemplateIfExists(ctx, pullRequestTemplateKey, pullRequestTemplateCandidates, pageMetaData)
 			if len(templateErrs) > 0 {
 				ctx.Flash.Warning(renderErrorOfTemplates(ctx, templateErrs), true)