Commits
Diff
diff --git a/cstyle/main.go b/cstyle/main.go
index 7e8726f..e302cfe 100644
--- a/cstyle/main.go
+++ b/cstyle/main.go
@@ -65,0 +66,5 @@ func (c *CSS) CreateDocument(doc *html.Node) element.Node {
+ Type: 3,
+ Node: &html.Node{Attr: []html.Attribute{
+ {Key: "Width", Val: fmt.Sprint(c.Width)},
+ {Key: "Height", Val: fmt.Sprint(c.Height)},
+ }},
@@ -74,3 +79,5 @@ func (c *CSS) CreateDocument(doc *html.Node) element.Node {
- Id: id,
- X: 0,
- Y: 0,
+ Node: n,
+ Id: id,
+ X: 0,
+ Y: 0,
+ Type: 3,
@@ -96 +103,3 @@ func CreateNode(parent element.Node, n *html.Node, slug string) element.Node {
- Id: id,
+ Id: id,
+ Type: n.Type,
+ Node: n,
@@ -264 +273 @@ func (c *CSS) ComputeNodeStyle(n *element.Node) *element.Node {
- base := utils.GetPositionOffsetNode(n)
+ base := GetPositionOffsetNode(n)
@@ -386,3 +395,3 @@ func initNodes(n *element.Node, c CSS) element.Node {
- // if ch.Properties.Type == html.ElementNode {
- ch.Parent = n
- cn := initNodes(&ch, c)
+ if ch.Properties.Type == html.ElementNode {
+ ch.Parent = n
+ cn := initNodes(&ch, c)
@@ -390 +399 @@ func initNodes(n *element.Node, c CSS) element.Node {
- n.Children[i] = cn
+ n.Children[i] = cn
@@ -392 +401 @@ func initNodes(n *element.Node, c CSS) element.Node {
- // }
+ }
@@ -569,0 +579,14 @@ func genTextNode(n *element.Node, width, height *float32, p utils.MarginPadding)
+
+func GetPositionOffsetNode(n *element.Node) *element.Node {
+ pos := n.Style["position"]
+
+ if pos == "relative" {
+ return n
+ } else {
+ if n.Parent.Properties.Node != nil {
+ return GetPositionOffsetNode(n.Parent)
+ } else {
+ return nil
+ }
+ }
+}
package cstyle
// package aui/goldie
// https://pkg.go.dev/automated.sh/goldie
// https://pkg.go.dev/automated.sh/aui
// https://pkg.go.dev/automated.sh/oat
import (
"crypto/md5"
"encoding/hex"
"fmt"
"gui/color"
"gui/element"
"gui/font"
"gui/parser"
"gui/utils"
"os"
"slices"
"sort"
"strconv"
"strings"
"golang.org/x/net/html"
)
type Plugin struct {
Styles map[string]string
Level int
Handler func(*element.Node)
}
type CSS struct {
Width float32
Height float32
StyleSheets []map[string]map[string]string
Plugins []Plugin
Document *element.Node
}
func (c *CSS) StyleSheet(path string) {
// Parse the CSS file
dat, err := os.ReadFile(path)
utils.Check(err)
styles := parser.ParseCSS(string(dat))
c.StyleSheets = append(c.StyleSheets, styles)
}
func (c *CSS) StyleTag(css string) {
styles := parser.ParseCSS(css)
c.StyleSheets = append(c.StyleSheets, styles)
}
func (c *CSS) CreateDocument(doc *html.Node) element.Node {
id := doc.FirstChild.Data + "0"
n := doc.FirstChild
node := element.Node{
Parent: &element.Node{
Properties: element.Properties{
Id: "ROOT",
X: 0,
Y: 0,
Width: c.Width,
Height: c.Height,
EM: 16,
},
Style: map[string]string{
"width": strconv.FormatFloat(float64(c.Width), 'f', -1, 32) + "px",
"height": strconv.FormatFloat(float64(c.Height), 'f', -1, 32) + "px",
},
},
Properties: element.Properties{
Id: id,
X: 0,
Y: 0,
},
}
i := 0
for child := n.FirstChild; child != nil; child = child.NextSibling {
if child.Type == html.ElementNode {
node.Children = append(node.Children, CreateNode(node, child, fmt.Sprint(i)))
i++
}
}
return initNodes(&node, *c)
}
func CreateNode(parent element.Node, n *html.Node, slug string) element.Node {
id := n.Data + slug
node := element.Node{
Parent: &parent,
TagName: n.Data,
InnerText: utils.GetInnerText(n),
Properties: element.Properties{
Id: id,
},
}
for _, attr := range n.Attr {
if attr.Key == "class" {
classes := strings.Split(attr.Val, " ")
for _, class := range classes {
node.ClassList.Add(class)
}
} else if attr.Key == "id" {
node.Id = attr.Val
} else if attr.Key == "contenteditable" && (attr.Val == "" || attr.Val == "true") {
node.Properties.Editable = true
} else if attr.Key == "href" {
node.Href = attr.Val
} else if attr.Key == "src" {
node.Src = attr.Val
} else if attr.Key == "title" {
node.Title = attr.Val
}
}
i := 0
for child := n.FirstChild; child != nil; child = child.NextSibling {
if child.Type == html.ElementNode {
node.Children = append(node.Children, CreateNode(node, child, slug+fmt.Sprint(i)))
i++
}
}
return node
}
var inheritedProps = []string{
"color",
"cursor",
"font",
"font-family",
"font-size",
"font-style",
"font-weight",
"letter-spacing",
"line-height",
"text-align",
"text-indent",
"text-justify",
"text-shadow",
"text-transform",
"visibility",
"word-spacing",
"display",
}
// need to get rid of the .props for the most part all styles should be computed dynamically
// can keep like focusable and stuff that describes the element
// currently the append child does not work due to the props and other stuff not existing so it fails
// moving to a real time style compute would fix that
// :hover is parsed correctly but because the hash func doesn't invalidate it becuase the val
// is updated in the props. change to append :hover to style to create the effect
// or merge the class with the styles? idk have to think more
func (c *CSS) GetStyles(n element.Node) map[string]string {
styles := map[string]string{}
for k, v := range n.Style {
styles[k] = v
}
if n.Parent != nil {
ps := c.GetStyles(*n.Parent)
for _, v := range inheritedProps {
if ps[v] != "" {
styles[v] = ps[v]
}
}
}
hovered := false
if slices.Contains(n.ClassList.Classes, ":hover") {
hovered = true
}
for _, styleSheet := range c.StyleSheets {
for selector := range styleSheet {
// fmt.Println(selector, n.Properties.Id)
key := selector
if strings.Contains(selector, ":hover") && hovered {
selector = strings.Replace(selector, ":hover", "", -1)
}
if element.TestSelector(selector, &n) {
for k, v := range styleSheet[key] {
styles[k] = v
}
}
}
}
inline := parser.ParseStyleAttribute(n.GetAttribute("style") + ";")
styles = utils.Merge(styles, inline)
// add hover and focus css events
return styles
}
func (c *CSS) Render(doc element.Node) []element.Node {
return flatten(doc)
}
func (c *CSS) AddPlugin(plugin Plugin) {
c.Plugins = append(c.Plugins, plugin)
}
func hash(n *element.Node) string {
// Create a new FNV-1a hash
hasher := md5.New()
// Extract and sort the keys
var keys []string
for key := range n.Style {
keys = append(keys, key)
}
sort.Strings(keys)
// Concatenate all values into a single string
var concatenatedValues string
for _, key := range keys {
concatenatedValues += key + n.Style[key]
}
concatenatedValues += n.ClassList.Value
concatenatedValues += n.Id
hasher.Write([]byte(concatenatedValues))
sum := hasher.Sum(nil)
str := hex.EncodeToString(sum)
if n.Properties.Hash != str {
fmt.Println(n.Properties.Id)
fmt.Println(concatenatedValues)
fmt.Println(n.Properties.Hash, str)
}
return str
}
func (c *CSS) ComputeNodeStyle(n *element.Node) *element.Node {
plugins := c.Plugins
hv := hash(n)
if n.Properties.Hash != hv {
fmt.Println("RELOAD")
// this is kinda a sloppy way to do this but it works ig
n.Style = c.GetStyles(*n)
n.Properties.Hash = hv
}
styleMap := n.Style
if styleMap["display"] == "none" {
n.Properties.X = 0
n.Properties.Y = 0
n.Properties.Width = 0
n.Properties.Height = 0
return n
}
width, height := n.Properties.Width, n.Properties.Height
x, y := n.Parent.Properties.X, n.Parent.Properties.Y
var top, left, right, bottom bool = false, false, false, false
m := utils.GetMP(*n, "margin")
p := utils.GetMP(*n, "padding")
if styleMap["position"] == "absolute" {
base := utils.GetPositionOffsetNode(n)
if styleMap["top"] != "" {
v, _ := utils.ConvertToPixels(styleMap["top"], float32(n.Properties.EM), n.Parent.Properties.Width)
y = v + base.Properties.Y
top = true
}
if styleMap["left"] != "" {
v, _ := utils.ConvertToPixels(styleMap["left"], float32(n.Properties.EM), n.Parent.Properties.Width)
x = v + base.Properties.X
left = true
}
if styleMap["right"] != "" {
v, _ := utils.ConvertToPixels(styleMap["right"], float32(n.Properties.EM), n.Parent.Properties.Width)
x = (base.Properties.Width - width) - v
right = true
}
if styleMap["bottom"] != "" {
v, _ := utils.ConvertToPixels(styleMap["bottom"], float32(n.Properties.EM), n.Parent.Properties.Width)
y = (base.Properties.Height - height) - v
bottom = true
}
} else {
for i, v := range n.Parent.Children {
if v.Properties.Id == n.Properties.Id {
if i-1 > 0 {
sibling := n.Parent.Children[i-1]
if styleMap["display"] == "inline" {
if sibling.Style["display"] == "inline" {
y = sibling.Properties.Y
} else {
y = sibling.Properties.Y + sibling.Properties.Height
}
} else {
y = sibling.Properties.Y + sibling.Properties.Height
}
}
break
} else if styleMap["display"] != "inline" {
mc := utils.GetMP(v, "margin")
pc := utils.GetMP(v, "padding")
y += mc.Top + mc.Bottom + pc.Top + pc.Bottom + v.Properties.Height
}
}
}
// Display modes need to be calculated here
relPos := !top && !left && !right && !bottom
if left || relPos {
x += m.Left
}
if top || relPos {
y += m.Top
}
if right {
x -= m.Right
}
if bottom {
y -= m.Bottom
}
if len(n.Children) == 0 {
// Confirm text exists
if len(n.InnerText) > 0 {
innerWidth := width
innerHeight := height
genTextNode(n, &innerWidth, &innerHeight, p)
width = innerWidth + p.Left + p.Right
height = innerHeight
}
}
n.Properties.X = x
n.Properties.Y = y
n.Properties.Width = width
n.Properties.Height = height
// Call children here
var childYOffset float32
for i, v := range n.Children {
v.Parent = n
n.Children[i] = *c.ComputeNodeStyle(&v)
if styleMap["height"] == "" {
if n.Children[i].Style["position"] != "absolute" && n.Children[i].Properties.Y > childYOffset {
childYOffset = n.Children[i].Properties.Y
m := utils.GetMP(n.Children[i], "margin")
p := utils.GetMP(n.Children[i], "padding")
n.Properties.Height += n.Children[i].Properties.Height
n.Properties.Height += m.Top
n.Properties.Height += m.Bottom
n.Properties.Height += p.Top
n.Properties.Height += p.Bottom
}
}
}
// Sorting the array by the Level field
sort.Slice(plugins, func(i, j int) bool {
return plugins[i].Level < plugins[j].Level
})
for _, v := range plugins {
matches := true
for name, value := range v.Styles {
if styleMap[name] != value && !(value == "*") {
matches = false
}
}
if matches {
v.Handler(n)
}
}
return n
}
func initNodes(n *element.Node, c CSS) element.Node {
n = InitNode(n, c)
for i, ch := range n.Children {
// if ch.Properties.Type == html.ElementNode {
ch.Parent = n
cn := initNodes(&ch, c)
n.Children[i] = cn
// }
}
return *n
}
func InitNode(n *element.Node, c CSS) *element.Node {
n.Style = c.GetStyles(*n)
border, err := CompleteBorder(n.Style)
if err == nil {
n.Properties.Border = border
}
fs, _ := utils.ConvertToPixels(n.Style["font-size"], n.Parent.Properties.EM, n.Parent.Properties.Width)
n.Properties.EM = fs
width, _ := utils.ConvertToPixels(n.Style["width"], n.Properties.EM, n.Parent.Properties.Width)
if n.Style["min-width"] != "" {
minWidth, _ := utils.ConvertToPixels(n.Style["min-width"], n.Properties.EM, n.Parent.Properties.Width)
width = utils.Max(width, minWidth)
}
if n.Style["max-width"] != "" {
maxWidth, _ := utils.ConvertToPixels(n.Style["max-width"], n.Properties.EM, n.Parent.Properties.Width)
width = utils.Min(width, maxWidth)
}
height, _ := utils.ConvertToPixels(n.Style["height"], n.Properties.EM, n.Parent.Properties.Height)
if n.Style["min-height"] != "" {
minHeight, _ := utils.ConvertToPixels(n.Style["min-height"], n.Properties.EM, n.Parent.Properties.Height)
height = utils.Max(height, minHeight)
}
if n.Style["max-height"] != "" {
maxHeight, _ := utils.ConvertToPixels(n.Style["max-height"], n.Properties.EM, n.Parent.Properties.Height)
height = utils.Min(height, maxHeight)
}
n.Properties.Width = width
n.Properties.Height = height
bold, italic := false, false
if n.Style["font-weight"] == "bold" {
bold = true
}
if n.Style["font-style"] == "italic" {
italic = true
}
f, _ := font.LoadFont(n.Style["font-family"], int(n.Properties.EM), bold, italic)
letterSpacing, _ := utils.ConvertToPixels(n.Style["letter-spacing"], n.Properties.EM, width)
wordSpacing, _ := utils.ConvertToPixels(n.Style["word-spacing"], n.Properties.EM, width)
lineHeight, _ := utils.ConvertToPixels(n.Style["line-height"], n.Properties.EM, width)
if lineHeight == 0 {
lineHeight = n.Properties.EM + 3
}
n.Properties.Text.LineHeight = int(lineHeight)
n.Properties.Text.Font = f
n.Properties.Text.WordSpacing = int(wordSpacing)
n.Properties.Text.LetterSpacing = int(letterSpacing)
return n
}
func parseBorderShorthand(borderShorthand string) (element.Border, error) {
// Split the shorthand into components
borderComponents := strings.Fields(borderShorthand)
// Ensure there are at least 1 component (width or style or color)
if len(borderComponents) >= 1 {
width := "0px" // Default width
style := "solid"
borderColor := "#000000" // Default color
// Extract style and color if available
if len(borderComponents) >= 1 {
width = borderComponents[0]
}
// Extract style and color if available
if len(borderComponents) >= 2 {
style = borderComponents[1]
}
if len(borderComponents) >= 3 {
borderColor = borderComponents[2]
}
parsedColor, _ := color.Color(borderColor)
return element.Border{
Width: width,
Style: style,
Color: parsedColor,
Radius: "", // Default radius
}, nil
}
return element.Border{}, fmt.Errorf("invalid border shorthand format")
}
func CompleteBorder(cssProperties map[string]string) (element.Border, error) {
border, err := parseBorderShorthand(cssProperties["border"])
border.Radius = cssProperties["border-radius"]
return border, err
}
func flatten(n element.Node) []element.Node {
var nodes []element.Node
nodes = append(nodes, n)
children := n.Children
if len(children) > 0 {
for _, ch := range children {
chNodes := flatten(ch)
nodes = append(nodes, chNodes...)
}
}
return nodes
}
func genTextNode(n *element.Node, width, height *float32, p utils.MarginPadding) {
wb := " "
if n.Style["word-wrap"] == "break-word" {
wb = ""
}
if n.Style["text-wrap"] == "wrap" || n.Style["text-wrap"] == "balance" {
wb = ""
}
letterSpacing, _ := utils.ConvertToPixels(n.Style["letter-spacing"], n.Properties.EM, *width)
wordSpacing, _ := utils.ConvertToPixels(n.Style["word-spacing"], n.Properties.EM, *width)
var dt float32
if n.Style["text-decoration-thickness"] == "auto" || n.Style["text-decoration-thickness"] == "" {
dt = 2
} else {
dt, _ = utils.ConvertToPixels(n.Style["text-decoration-thickness"], n.Properties.EM, *width)
}
col := color.Parse(n.Style, "font")
n.Properties.Text.Color = col
n.Properties.Text.Align = n.Style["text-align"]
n.Properties.Text.WordBreak = wb
n.Properties.Text.WordSpacing = int(wordSpacing)
n.Properties.Text.LetterSpacing = int(letterSpacing)
n.Properties.Text.WhiteSpace = n.Style["white-space"]
n.Properties.Text.DecorationThickness = int(dt)
n.Properties.Text.Overlined = n.Style["text-decoration"] == "overline"
n.Properties.Text.Underlined = n.Style["text-decoration"] == "underline"
n.Properties.Text.LineThrough = n.Style["text-decoration"] == "linethrough"
n.Properties.Text.EM = int(n.Properties.EM)
n.Properties.Text.Width = int(n.Parent.Properties.Width)
if n.Style["word-spacing"] == "" {
n.Properties.Text.WordSpacing = font.MeasureSpace(&n.Properties.Text)
}
if n.Parent.Properties.Width != 0 && n.Style["display"] != "inline" && n.Style["width"] == "" {
*width = (n.Parent.Properties.Width - p.Right) - p.Left
} else if n.Style["width"] == "" {
*width = utils.Max(*width, float32(font.MeasureLongest(n)))
} else if n.Style["width"] != "" {
*width, _ = utils.ConvertToPixels(n.Style["width"], n.Properties.EM, n.Parent.Properties.Width)
}
n.Properties.Text.Width = int(*width)
h := font.Render(n)
if n.Style["height"] == "" {
*height = h
}
}