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Merge pull request #698 from trheyi/main
add event binding logic in SUI core
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,85 @@ | ||
| package core | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "strings" | ||
|
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| "github.com/PuerkitoBio/goquery" | ||
| jsoniter "github.com/json-iterator/go" | ||
| "golang.org/x/net/html" | ||
| ) | ||
|
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||
| // 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) | ||
| }) | ||
| } | ||
|
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| func (page *Page) appendEventScript(ctx *BuildContext, sel *goquery.Selection) { | ||
|
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| if len(sel.Nodes) == 0 { | ||
| return | ||
| } | ||
|
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| // Page events | ||
| events := map[string]string{} | ||
| dataUnique := map[string]string{} | ||
| jsonUnique := map[string]string{} | ||
| id := fmt.Sprintf("event-%d", ctx.sequence) | ||
| ctx.sequence++ | ||
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| for _, attr := range sel.Nodes[0].Attr { | ||
|
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| if strings.HasPrefix(attr.Key, "s:on-") { | ||
| name := strings.TrimPrefix(attr.Key, "s:on-") | ||
| handler := attr.Val | ||
| events[name] = handler | ||
| continue | ||
| } | ||
|
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| 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 | ||
| } | ||
|
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| 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 | ||
| } | ||
| } | ||
|
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| data := []string{} | ||
| for name := range dataUnique { | ||
| data = append(data, name) | ||
| sel.RemoveAttr(fmt.Sprintf("s:data-%s", name)) | ||
| } | ||
|
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| json := []string{} | ||
| for name := range jsonUnique { | ||
| json = append(json, name) | ||
| sel.RemoveAttr(fmt.Sprintf("s:json-%s", name)) | ||
| } | ||
|
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| dataRaw, _ := jsoniter.MarshalToString(data) | ||
| jsonRaw, _ := jsoniter.MarshalToString(json) | ||
|
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| source := "" | ||
| for name, handler := range events { | ||
| source += pageEventInjectScript(id, name, dataRaw, jsonRaw, handler) + "\n" | ||
| sel.RemoveAttr(fmt.Sprintf("s:on-%s", name)) | ||
| } | ||
|
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| ctx.scripts = append(ctx.scripts, ScriptNode{ | ||
| Source: source, | ||
| Namespace: page.namespace, | ||
| Attrs: []html.Attribute{{Key: "event", Val: id}}, | ||
| }) | ||
|
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||
| sel.SetAttr("s:event", id) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,74 @@ | ||
| package core | ||
|
|
||
| import ( | ||
| "regexp" | ||
| "strings" | ||
|
|
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| "golang.org/x/net/html" | ||
| ) | ||
|
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| // AttrMatcher is a matcher that matches attribute keys | ||
| type AttrMatcher struct { | ||
| prefix string | ||
| re *regexp.Regexp | ||
| } | ||
|
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| // NewAttrPrefixMatcher creates a new attribute matcher that matches attribute keys with the given prefix | ||
| func NewAttrPrefixMatcher(prefix string) *AttrMatcher { | ||
| return &AttrMatcher{prefix: prefix} | ||
| } | ||
|
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| // NewAttrRegexpMatcher creates a new attribute matcher that matches attribute keys with the given regexp | ||
| func NewAttrRegexpMatcher(re *regexp.Regexp) *AttrMatcher { | ||
| return &AttrMatcher{re: re} | ||
| } | ||
|
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| // 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) | ||
| } | ||
|
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| func (m *AttrMatcher) regexpMatch(n *html.Node) bool { | ||
| for _, attr := range n.Attr { | ||
| if m.re.MatchString(attr.Key) { | ||
| return true | ||
| } | ||
| } | ||
| return false | ||
| } | ||
|
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| func (m *AttrMatcher) prefixMatch(n *html.Node) bool { | ||
| for _, attr := range n.Attr { | ||
| if strings.HasPrefix(attr.Key, m.prefix) { | ||
| return true | ||
| } | ||
| } | ||
| return false | ||
| } | ||
|
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| // 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 | ||
|
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| } | ||
|
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| // 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 | ||
| } |
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