Commits
Diff
package gui
import (
"bufio"
"gui/cstyle"
"gui/element"
"net/url"
"os"
"path/filepath"
"regexp"
"strconv"
"strings"
"golang.org/x/net/html"
)
// _ "net/http/pprof"
type Window struct {
CSS cstyle.CSS
Document element.Node
}
func Open(path string) Window {
window := New()
styleSheets, styleTags, html := parseHTMLFromFile(path)
for _, v := range styleSheets {
window.CSS.StyleSheet(v)
}
for _, v := range styleTags {
window.CSS.StyleTag(v)
}
return window
}
func New() Window {
el := element.Node{}
document := el.CreateElement("ROOT")
document.Style["width"] = "800px"
document.Style["height"] = "450px"
document.Properties.Id = "ROOT"
return Window{
CSS: cstyle.CSS{
Width: 800,
Height: 450,
},
Document: document,
}
}
func Display(window Window, width, height int) {
window.Document.Style["width"] = strconv.Itoa(width) + "px"
window.Document.Style["height"] = strconv.Itoa(height) + "px"
}
func parseHTMLFromFile(path string) ([]string, []string, *html.Node) {
file, _ := os.Open(path)
defer file.Close()
scanner := bufio.NewScanner(file)
var htmlContent string
for scanner.Scan() {
htmlContent += scanner.Text() + "\n"
}
// println(encapsulateText(htmlContent))
doc, _ := html.Parse(strings.NewReader(encapsulateText(htmlContent)))
// Extract stylesheet link tags and style tags
stylesheets := extractStylesheets(doc, filepath.Dir(path))
styleTags := extractStyleTags(doc)
return stylesheets, styleTags, doc
}
func extractStylesheets(n *html.Node, baseDir string) []string {
var stylesheets []string
var dfs func(*html.Node)
dfs = func(node *html.Node) {
if node.Type == html.ElementNode && node.Data == "link" {
var href string
isStylesheet := false
for _, attr := range node.Attr {
if attr.Key == "rel" && attr.Val == "stylesheet" {
isStylesheet = true
} else if attr.Key == "href" {
href = attr.Val
}
}
if isStylesheet {
resolvedHref := localizePath(baseDir, href)
stylesheets = append(stylesheets, resolvedHref)
}
}
for c := node.FirstChild; c != nil; c = c.NextSibling {
dfs(c)
}
}
dfs(n)
return stylesheets
}
func extractStyleTags(n *html.Node) []string {
var styleTags []string
var dfs func(*html.Node)
dfs = func(node *html.Node) {
if node.Type == html.ElementNode && node.Data == "style" {
var styleContent strings.Builder
for c := node.FirstChild; c != nil; c = c.NextSibling {
if c.Type == html.TextNode {
styleContent.WriteString(c.Data)
}
}
styleTags = append(styleTags, styleContent.String())
}
for c := node.FirstChild; c != nil; c = c.NextSibling {
dfs(c)
}
}
dfs(n)
return styleTags
}
func localizePath(rootPath, filePath string) string {
// Check if the file path has a scheme, indicating it's a URL
u, err := url.Parse(filePath)
if err == nil && u.Scheme != "" {
return filePath
}
// Join the root path and the file path to create an absolute path
absPath := filepath.Join(rootPath, filePath)
// If the absolute path is the same as the original path, return it
if absPath == filePath {
return filePath
}
return "./" + absPath
}
func encapsulateText(htmlString string) string {
htmlString = removeHTMLComments(htmlString)
openOpen := regexp.MustCompile(`(<\w+[^>]*>)([^<]+)(<\w+[^>]*>)`)
closeOpen := regexp.MustCompile(`(]*>)([^<]+)(<\w+[^>]*>)`)
closeClose := regexp.MustCompile(`(]*>)([^<]+)(]*>)`)
a := matchFactory(openOpen)
t := openOpen.ReplaceAllStringFunc(htmlString, a)
b := matchFactory(closeOpen)
u := closeOpen.ReplaceAllStringFunc(t, b)
c := matchFactory(closeClose)
v := closeClose.ReplaceAllStringFunc(u, c)
return v
}
func matchFactory(re *regexp.Regexp) func(string) string {
return func(match string) string {
submatches := re.FindStringSubmatch(match)
if len(submatches) != 4 {
return match
}
// Process submatches
if len(removeWhitespace(submatches[2])) > 0 {
return submatches[1] + "" + submatches[2] + "" + submatches[3]
} else {
return match
}
}
}
func removeWhitespace(htmlString string) string {
// Remove extra white space
reSpaces := regexp.MustCompile(`\s+`)
htmlString = reSpaces.ReplaceAllString(htmlString, " ")
// Trim leading and trailing white space
htmlString = strings.TrimSpace(htmlString)
return htmlString
}
func removeHTMLComments(htmlString string) string {
re := regexp.MustCompile(``)
return re.ReplaceAllString(htmlString, "")
}
