add event binding logic in SUI core

sui/core/build.go

@@ -54,6 +54,9 @@ func (page *Page) Build(ctx *BuildContext, option *BuildOption) (*goquery.Docume
 	}
 	doc.Find("body").SetAttr("s:ns", namespace)
 
+	// Bind the Page events
+	page.BindEvent(ctx, doc.Selection)
+
 	warnings, err := page.buildComponents(doc, ctx, option)
 	if err != nil {
 		return nil, ctx.warnings, err
@@ -105,6 +108,7 @@ func (page *Page) Build(ctx *BuildContext, option *BuildOption) (*goquery.Docume
 	// Append the scripts and styles
 	ctx.scripts = append(ctx.scripts, scripts...)
 	ctx.styles = append(ctx.styles, styles...)
+
 	return doc, ctx.warnings, err
 }
 
@@ -278,6 +282,12 @@ func (page *Page) parseProps(from *goquery.Selection, to *goquery.Selection, ext
 
 	for _, attr := range attrs {
 
+		// Copy Event
+		if strings.HasPrefix(attr.Key, "s:event") || strings.HasPrefix(attr.Key, "data:") || strings.HasPrefix(attr.Key, "json:") {
+			to.SetAttr(attr.Key, attr.Val)
+			continue
+		}
+
 		if strings.HasPrefix(attr.Key, "s:") || attr.Key == "is" || attr.Key == "parsed" {
 			continue
 		}

sui/core/event.go

@@ -0,0 +1,85 @@
+package core
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/PuerkitoBio/goquery"
+	jsoniter "github.com/json-iterator/go"
+	"golang.org/x/net/html"
+)
+
+// BindEvent is a method that binds events to the page.
+func (page *Page) BindEvent(ctx *BuildContext, sel *goquery.Selection) {
+	matcher := NewAttrPrefixMatcher(`s:on-`)
+	sel.FindMatcher(matcher).Each(func(i int, s *goquery.Selection) {
+		page.appendEventScript(ctx, s)
+	})
+}
+
+func (page *Page) appendEventScript(ctx *BuildContext, sel *goquery.Selection) {
+
+	if len(sel.Nodes) == 0 {
+		return
+	}
+
+	// Page events
+	events := map[string]string{}
+	dataUnique := map[string]string{}
+	jsonUnique := map[string]string{}
+	id := fmt.Sprintf("event-%d", ctx.sequence)
+	ctx.sequence++
+
+	for _, attr := range sel.Nodes[0].Attr {
+
+		if strings.HasPrefix(attr.Key, "s:on-") {
+			name := strings.TrimPrefix(attr.Key, "s:on-")
+			handler := attr.Val
+			events[name] = handler
+			continue
+		}
+
+		if strings.HasPrefix(attr.Key, "s:data-") {
+			name := strings.TrimPrefix(attr.Key, "s:data-")
+			dataUnique[name] = attr.Val
+			sel.SetAttr(fmt.Sprintf("data:%s", name), attr.Val)
+			continue
+		}
+
+		if strings.HasPrefix(attr.Key, "s:json-") {
+			name := strings.TrimPrefix(attr.Key, "s:json-")
+			jsonUnique[name] = attr.Val
+			sel.SetAttr(fmt.Sprintf("json:%s", name), attr.Val)
+			continue
+		}
+	}
+
+	data := []string{}
+	for name := range dataUnique {
+		data = append(data, name)
+		sel.RemoveAttr(fmt.Sprintf("s:data-%s", name))
+	}
+
+	json := []string{}
+	for name := range jsonUnique {
+		json = append(json, name)
+		sel.RemoveAttr(fmt.Sprintf("s:json-%s", name))
+	}
+
+	dataRaw, _ := jsoniter.MarshalToString(data)
+	jsonRaw, _ := jsoniter.MarshalToString(json)
+
+	source := ""
+	for name, handler := range events {
+		source += pageEventInjectScript(id, name, dataRaw, jsonRaw, handler) + "\n"
+		sel.RemoveAttr(fmt.Sprintf("s:on-%s", name))
+	}
+
+	ctx.scripts = append(ctx.scripts, ScriptNode{
+		Source:    source,
+		Namespace: page.namespace,
+		Attrs:     []html.Attribute{{Key: "event", Val: id}},
+	})
+
+	sel.SetAttr("s:event", id)
+}

sui/core/injections.go

@@ -7,15 +7,28 @@ const initScriptTmpl = `
 		var __sui_data = %s;
 	} catch (e) { console.log('init data error:', e); }
 
-	function __sui_findParentWithAttribute(element, attributeName) {
-		while (element && element !== document) {
-			if (element.hasAttribute(attributeName)) {
-				return element.getAttribute(attributeName);
+
+	function __sui_event_handler(event, dataKeys, jsonKeys, elm, handler) {
+		const data = {};
+		dataKeys.forEach(function (key) {
+			const value = elm.getAttribute("data:" + key);
+			data[key] = value;
+		})
+		jsonKeys.forEach(function (key) {
+			const value = elm.getAttribute("json:" + key);
+			data[key] = null;
+			if (value && value != "") {
+				try {
+					data[key] = JSON.parse(value);
+				} catch (e) {
+				 	const message = e.message || e || "An error occurred";
+					console.error(` + "`[SUI] Event Handler Error: ${message}`" + `, elm);
+				}
 			}
-			element = element.parentElement;
-		}
-		return null;
-	}
+		})
+			
+		handler && handler(event, data, elm);
+	};
 
 	document.addEventListener("DOMContentLoaded", function () {
 		try {
@@ -31,39 +44,6 @@ const initScriptTmpl = `
 					}
 				}
 			});
-
-			document.querySelectorAll("[s\\:click]").forEach(function (element) {
-				const method = element.getAttribute("s:click");
-				const cn = __sui_findParentWithAttribute(element, "s:cn");
-				if (method && cn && typeof window[cn] === "function") {
-					const obj = new window[cn]();
-					if (typeof obj[method] === "function") {
-						element.addEventListener("click", function (event) {
-							try {
-								obj[method](element, event);
-							} catch (e) {
-								const message = e.message || e || "An error occurred";
-								console.error(` + "`[SUI] ${cn}.${method} Error: ${message}`" + `);
-							}
-						});
-						return
-					}
-					console.error(` + "`[SUI] ${cn}.${method} Error: Method not found`" + `);
-					return
-				}
-
-				if (method && typeof window[method] === "function") {
-					element.addEventListener("click", function (event) {
-						try {
-							window[method](element, event);
-						} catch (e) {
-							const message = e.message || e || "An error occurred";
-							console.error(` + "`[SUI] ${method} Error: ${message}`" + `);
-						}
-					});
-				}
-
-			});
 		} catch (e) {}
 	});
 	%s
@@ -83,6 +63,14 @@ const i118nScriptTmpl = `
 	}
 `
 
+const pageEventScriptTmpl = `
+	document.querySelector("[s\\:event=%s]").addEventListener("%s", function (event) {
+		const dataKeys = %s;
+		const jsonKeys = %s;
+		__sui_event_handler(event, dataKeys, jsonKeys, this, %s);
+	});
+`
+
 func bodyInjectionScript(jsonRaw string, debug bool) string {
 	jsPrintData := ""
 	if debug {
@@ -94,3 +82,7 @@ func bodyInjectionScript(jsonRaw string, debug bool) string {
 func headInjectionScript(jsonRaw string) string {
 	return fmt.Sprintf(`<script type="text/javascript">`+i118nScriptTmpl+`</script>`, jsonRaw)
 }
+
+func pageEventInjectScript(eventID, eventName, dataKeys, jsonKeys, handler string) string {
+	return fmt.Sprintf(pageEventScriptTmpl, eventID, eventName, dataKeys, jsonKeys, handler)
+}

sui/core/matcher.go

@@ -0,0 +1,74 @@
+package core
+
+import (
+	"regexp"
+	"strings"
+
+	"golang.org/x/net/html"
+)
+
+// AttrMatcher is a matcher that matches attribute keys
+type AttrMatcher struct {
+	prefix string
+	re     *regexp.Regexp
+}
+
+// NewAttrPrefixMatcher creates a new attribute matcher that matches attribute keys with the given prefix
+func NewAttrPrefixMatcher(prefix string) *AttrMatcher {
+	return &AttrMatcher{prefix: prefix}
+}
+
+// NewAttrRegexpMatcher creates a new attribute matcher that matches attribute keys with the given regexp
+func NewAttrRegexpMatcher(re *regexp.Regexp) *AttrMatcher {
+	return &AttrMatcher{re: re}
+}
+
+// Match returns true if the node has an attribute key that matches the matcher
+func (m *AttrMatcher) Match(n *html.Node) bool {
+	if m.re == nil {
+		return m.prefixMatch(n)
+	}
+	return m.regexpMatch(n)
+}
+
+func (m *AttrMatcher) regexpMatch(n *html.Node) bool {
+	for _, attr := range n.Attr {
+		if m.re.MatchString(attr.Key) {
+			return true
+		}
+	}
+	return false
+}
+
+func (m *AttrMatcher) prefixMatch(n *html.Node) bool {
+	for _, attr := range n.Attr {
+		if strings.HasPrefix(attr.Key, m.prefix) {
+			return true
+		}
+	}
+	return false
+}
+
+// MatchAll returns all the nodes that have an attribute key that matches the matcher
+func (m *AttrMatcher) MatchAll(n *html.Node) []*html.Node {
+	var nodes []*html.Node
+	for c := n.FirstChild; c != nil; c = c.NextSibling {
+		if m.Match(c) {
+			nodes = append(nodes, c)
+		}
+		nodes = append(nodes, m.MatchAll(c)...)
+	}
+	return nodes
+
+}
+
+// Filter returns all the nodes that have an attribute key that matches the matcher
+func (m *AttrMatcher) Filter(ns []*html.Node) []*html.Node {
+	var nodes []*html.Node
+	for _, n := range ns {
+		if m.Match(n) {
+			nodes = append(nodes, n)
+		}
+	}
+	return nodes
+}

sui/core/parser.go

@@ -67,14 +67,14 @@ var allowUsePropAttrs = map[string]bool{
 	"s:if":    true,
 	"s:elif":  true,
 	"s:for":   true,
-	"s:click": true,
+	"s:event": true,
 }
 
 var keepAttrs = map[string]bool{
 	"s:ns":    true,
 	"s:cn":    true,
 	"s:ready": true,
-	"s:click": true,
+	"s:event": true,
 }
 
 // NewTemplateParser create a new template parser

sui/storages/local/page_test.go

@@ -66,13 +66,13 @@ func TestTemplatePageTree(t *testing.T) {
 
 	assert.NotEmpty(t, pages)
 	assert.NotEmpty(t, pages[1].Children)
-	if len(pages[1].Children) < 2 {
+	if len(pages[1].Children) < 3 {
 		t.Fatalf("Pages error: %v", len(pages[1].Children))
 	}
 
-	assert.NotEmpty(t, pages[1].Children[0].Children)
-	if len(pages[1].Children[0].Children) < 2 {
-		t.Fatalf("Pages error: %v", len(pages[1].Children[0].Children))
+	assert.NotEmpty(t, pages[2].Children[0].Children)
+	if len(pages[2].Children[0].Children) < 2 {
+		t.Fatalf("Pages error: %v", len(pages[2].Children[0].Children))
 	}
 }