Commits
Diff
package element
import (
"gui/selector"
"image"
ic "image/color"
"strings"
"golang.org/x/image/font"
"golang.org/x/net/html"
)
type Node struct {
TagName string
InnerText string
Parent *Node
Children []Node
Style map[string]string
PrevSibling *Node
NextSibling *Node
ScrollY float32
Value string
OnClick func(Event)
OnContextMenu func(Event)
OnMouseDown func(Event)
OnMouseUp func(Event)
OnMouseEnter func(Event)
OnMouseLeave func(Event)
OnMouseOver func(Event)
OnMouseMove func(Event)
OnScroll func(Event)
Properties Properties
}
type Properties struct {
Node *html.Node
Type html.NodeType
Id string
X float32
Y float32
Width float32
Height float32
Margin Margin
Padding Padding
Border Border
EventListeners map[string][]func(Event)
EM float32
Text Text
Colors Colors
Focusable bool
Focused bool
Editable bool
Selected []float32
}
type Margin struct {
Top float32
Right float32
Bottom float32
Left float32
}
type Padding struct {
Top float32
Right float32
Bottom float32
Left float32
}
type Border struct {
Width string
Style string
Color ic.RGBA
Radius string
}
type Text struct {
Font font.Face
Color ic.RGBA
Image *image.RGBA
Underlined bool
Overlined bool
LineThrough bool
DecorationColor ic.RGBA
DecorationThickness int
Align string
Indent int // very low priority
LetterSpacing int
LineHeight int
WordSpacing int
WhiteSpace string
Shadows []Shadow // need
Width int
WordBreak string
EM int
X int
}
type Shadow struct {
X int
Y int
Blur int
Color ic.RGBA
}
// Color represents an RGBA color
type Colors struct {
Background ic.RGBA
Font ic.RGBA
TextDecoration ic.RGBA
}
func (n *Node) GetAttribute(name string) string {
attributes := make(map[string]string)
for _, attr := range n.Properties.Node.Attr {
attributes[attr.Key] = attr.Val
}
return attributes[name]
}
func (n *Node) SetAttribute(key, value string) {
// Iterate through the attributes
for i, attr := range n.Properties.Node.Attr {
// If the attribute key matches, update its value
if attr.Key == key {
n.Properties.Node.Attr[i].Val = value
return
}
}
// If the attribute key was not found, add a new attribute
n.Properties.Node.Attr = append(n.Properties.Node.Attr, html.Attribute{
Key: key,
Val: value,
})
}
func (n *Node) QuerySelectorAll(selectString string) *[]*Node {
results := []*Node{}
if TestSelector(selectString, n) {
results = append(results, n)
}
for i := range n.Children {
el := &n.Children[i]
cr := el.QuerySelectorAll(selectString)
if len(*cr) > 0 {
results = append(results, *cr...)
}
}
return &results
}
func (n *Node) QuerySelector(selectString string) *Node {
if TestSelector(selectString, n) {
return n
}
for i := range n.Children {
el := &n.Children[i]
cr := el.QuerySelector(selectString)
if cr.Properties.Id != "" {
return cr
}
}
return &Node{}
}
func TestSelector(selectString string, n *Node) bool {
parts := strings.Split(selectString, ">")
selectors := selector.GetCSSSelectors(n.Properties.Node, []string{})
part := selector.SplitSelector(strings.TrimSpace(parts[len(parts)-1]))
has := selector.Contains(part, selectors)
if len(parts) == 1 || !has {
return has
} else {
return TestSelector(strings.Join(parts[0:len(parts)-1], ">"), n.Parent)
}
}
type Event struct {
X int
Y int
KeyCode int
Key string
CtrlKey bool
MetaKey bool
ShiftKey bool
AltKey bool
Click bool
ContextMenu bool
MouseDown bool
MouseUp bool
MouseEnter bool
MouseLeave bool
MouseOver bool
KeyUp bool
KeyDown bool
KeyPress bool
Input bool
Target Node
}
type EventList struct {
Event Event
List []string
}
func (node *Node) AddEventListener(name string, callback func(Event)) {
if node.Properties.EventListeners == nil {
node.Properties.EventListeners = make(map[string][]func(Event))
}
if node.Properties.EventListeners[name] == nil {
node.Properties.EventListeners[name] = []func(Event){}
}
node.Properties.EventListeners[name] = append(node.Properties.EventListeners[name], callback)
}
