Commits
Diff
diff --git a/element/main.go b/element/main.go
index f8dc37c..6d47afb 100644
--- a/element/main.go
+++ b/element/main.go
@@ -6,0 +7 @@ import (
+ "image"
@@ -53 +54 @@ type State struct {
- Textures []string
+ Texture *image.RGBA
@@ -56,3 +57,4 @@ type State struct {
- // Color ic.RGBA
- Margin MarginPadding
- Padding MarginPadding
+ Color ic.RGBA
+ Margin MarginPadding
+ Padding MarginPadding
+ Canvas *canvas.Canvas
package element
import (
"fmt"
"gui/canvas"
"gui/selector"
ic "image/color"
"math"
"strconv"
"strings"
"sync"
"golang.org/x/image/font"
)
type Node struct {
TagName string
InnerText string
InnerHTML string
OuterHTML string
Parent *Node `json:"-"`
Children []*Node
Style map[string]string
Id string
ClassList ClassList
Href string
Src string
Title string
Attribute map[string]string
ScrollY float32
Value string
OnClick func(Event) `json:"-"`
OnContextMenu func(Event) `json:"-"`
OnMouseDown func(Event) `json:"-"`
OnMouseUp func(Event) `json:"-"`
OnMouseEnter func(Event) `json:"-"`
OnMouseLeave func(Event) `json:"-"`
OnMouseOver func(Event) `json:"-"`
OnMouseMove func(Event) `json:"-"`
OnScroll func(Event) `json:"-"`
Properties Properties
}
type State struct {
// Id string
X float32
Y float32
Z float32
Width float32
Height float32
Border Border
Textures []string
EM float32
Background ic.RGBA
// Color ic.RGBA
Margin MarginPadding
Padding MarginPadding
}
// !FLAG: Plan to get rid of this
type Properties struct {
Id string
EventListeners map[string][]func(Event) `json:"-"`
Focusable bool
Focused bool
Editable bool
Hover bool
Selected []float32
}
type ClassList struct {
Classes []string
Value string
}
type MarginPadding struct {
Top float32
Left float32
Right float32
Bottom float32
}
func (c *ClassList) Add(class string) {
c.Classes = append(c.Classes, class)
c.Value = strings.Join(c.Classes, " ")
}
func (c *ClassList) Remove(class string) {
for i, v := range c.Classes {
if v == class {
c.Classes = append(c.Classes[:i], c.Classes[i+1:]...)
break
}
}
c.Value = strings.Join(c.Classes, " ")
}
type Border struct {
Top BorderSide
Right BorderSide
Bottom BorderSide
Left BorderSide
Radius BorderRadius
}
type BorderSide struct {
Width float32
Style string
Color ic.RGBA
}
type BorderRadius struct {
TopLeft float32
TopRight float32
BottomLeft float32
BottomRight float32
}
type Text struct {
Font *font.Face
Color ic.RGBA
Text string
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
LoadedFont string
Last bool
}
type Shadow struct {
X int
Y int
Blur int
Color ic.RGBA
}
func (n *Node) GetAttribute(name string) string {
return n.Attribute[name]
}
func (n *Node) SetAttribute(key, value string) {
n.Attribute[key] = value
}
func (n *Node) CreateElement(name string) Node {
return Node{
TagName: name,
InnerText: "",
OuterHTML: "",
InnerHTML: "",
Children: []*Node{},
Style: make(map[string]string),
Id: "",
ClassList: ClassList{
Classes: []string{},
Value: "",
},
Href: "",
Src: "",
Title: "",
Attribute: make(map[string]string),
Value: "",
Properties: Properties{
Id: "",
EventListeners: make(map[string][]func(Event)),
Focusable: false,
Focused: false,
Editable: false,
Hover: false,
Selected: []float32{},
},
}
}
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 := []string{}
if n.Properties.Focusable && n.Properties.Focused {
selectors = append(selectors, ":focus")
}
for _, class := range n.ClassList.Classes {
selectors = append(selectors, "."+class)
}
if n.Id != "" {
selectors = append(selectors, "#"+n.Id)
}
selectors = append(selectors, n.TagName)
part := selector.SplitSelector(strings.TrimSpace(parts[len(parts)-1]))
has := selector.Contains(part, selectors)
if len(parts) == 1 || !has {
return has
}
return TestSelector(strings.Join(parts[:len(parts)-1], ">"), n.Parent)
}
var (
idCounter int64
mu sync.Mutex
)
func generateUniqueId(tagName string) string {
mu.Lock()
defer mu.Unlock()
if idCounter == math.MaxInt64 {
idCounter = 0
}
idCounter++
return tagName + strconv.FormatInt(idCounter, 10)
}
func (n *Node) AppendChild(c *Node) {
c.Parent = n
c.Properties.Id = generateUniqueId(c.TagName)
n.Children = append(n.Children, c)
}
func (n *Node) InsertAfter(c, tgt *Node) {
c.Parent = n
c.Properties.Id = generateUniqueId(c.TagName)
nodeIndex := -1
for i, v := range n.Children {
if v.Properties.Id == tgt.Properties.Id {
nodeIndex = i
break
}
}
if nodeIndex > -1 {
n.Children = append(n.Children[:nodeIndex+1], append([]*Node{c}, n.Children[nodeIndex+1:]...)...)
} else {
n.AppendChild(c)
}
}
func (n *Node) InsertBefore(c, tgt *Node) {
c.Parent = n
// Set Id
c.Properties.Id = generateUniqueId(c.TagName)
nodeIndex := -1
for i, v := range n.Children {
if v.Properties.Id == tgt.Properties.Id {
nodeIndex = i
break
}
}
if nodeIndex > 0 {
n.Children = append(n.Children[:nodeIndex], append([]*Node{c}, n.Children[nodeIndex:]...)...)
// n.Children = append(n.Children, Node{}) // Add a zero value to expand the slice
// copy(n.Children[nodeIndex+1:], n.Children[nodeIndex:])
// n.Children[nodeIndex] = c
} else {
n.AppendChild(c)
}
}
func (n *Node) Remove() {
nodeIndex := -1
for i, v := range n.Parent.Children {
if v.Properties.Id == n.Properties.Id {
nodeIndex = i
break
}
}
if nodeIndex > 0 {
n.Parent.Children = append(n.Parent.Children[:nodeIndex], n.Parent.Children[nodeIndex+1:]...)
}
}
func (n *Node) Focus() {
if n.Properties.Focusable {
n.Properties.Focused = true
n.ClassList.Add(":focus")
}
}
func (n *Node) Blur() {
if n.Properties.Focusable {
n.Properties.Focused = false
n.ClassList.Remove(":focus")
}
}
func (n *Node) GetContext(width, height int) canvas.Canvas {
return *canvas.NewCanvas(width, height)
}
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
Name string
Data interface{}
}
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){}
}
if !funcInSlice(callback, node.Properties.EventListeners[name]) {
node.Properties.EventListeners[name] = append(node.Properties.EventListeners[name], callback)
}
}
func funcInSlice(f func(Event), slice []func(Event)) bool {
for _, item := range slice {
// Compare function values directly
if fmt.Sprintf("%p", item) == fmt.Sprintf("%p", f) {
return true
}
}
return false
}