GUI

GUI is the source package

# Open?(go)

# New?(go)

# View?(go)

# CreateNode?(go)

# extractStylesheets?(go)

# extractStyleTags?(go)

# localizePath?(go)

# encapsulateText?(go)

# matchFactory?(go)

# removeWhitespace?(go)

# removeHTMLComments?(go)

  1package gui
  2
  3import (
  4	"bufio"
  5	_ "embed"
  6	"gui/cstyle"
  7	"gui/cstyle/plugins/block"
  8	"gui/cstyle/plugins/flex"
  9	"gui/cstyle/plugins/inline"
 10	"gui/window"
 11
 12	"gui/element"
 13	"gui/events"
 14	"gui/utils"
 15	"net/url"
 16	"os"
 17	"path/filepath"
 18	"regexp"
 19	"strconv"
 20	"strings"
 21
 22	rl "github.com/gen2brain/raylib-go/raylib"
 23	"golang.org/x/net/html"
 24)
 25
 26// _ "net/http/pprof"
 27
 28//go:embed master.css
 29var mastercss string
 30
 31type Window struct {
 32	CSS      cstyle.CSS
 33	Document element.Node
 34	Adapter  func()
 35}
 36
 37func Open(path string) Window {
 38	window := New()
 39
 40	styleSheets, styleTags, htmlNodes := parseHTMLFromFile(path)
 41
 42	for _, v := range styleSheets {
 43		window.CSS.StyleSheet(v)
 44	}
 45
 46	for _, v := range styleTags {
 47		window.CSS.StyleTag(v)
 48	}
 49
 50	CreateNode(htmlNodes, &window.Document)
 51
 52	return window
 53}
 54
 55func New() Window {
 56	css := cstyle.CSS{
 57		Width:  800,
 58		Height: 450,
 59	}
 60
 61	css.StyleTag(mastercss)
 62	// This is still apart of computestyle
 63	// css.AddPlugin(position.Init())
 64	css.AddPlugin(inline.Init())
 65	css.AddPlugin(block.Init())
 66	css.AddPlugin(flex.Init())
 67
 68	el := element.Node{}
 69	document := el.CreateElement("ROOT")
 70	document.Style["width"] = "800px"
 71	document.Style["height"] = "450px"
 72	document.Properties.Id = "ROOT"
 73	return Window{
 74		CSS:      css,
 75		Document: document,
 76	}
 77}
 78
 79func (w *Window) Render(state map[string]element.State) []element.State {
 80	flatDoc := flatten(w.Document)
 81	store := []element.State{}
 82
 83	for _, v := range flatDoc {
 84		// wont work unless state is a pointer to the og
 85		// s := state[v.Properties.Id]
 86		// s.RenderCount++
 87		// state[v.Properties.Id] = s
 88		store = append(store, state[v.Properties.Id])
 89	}
 90	return store
 91}
 92
 93func flatten(n element.Node) []element.Node {
 94	var nodes []element.Node
 95	nodes = append(nodes, n)
 96
 97	children := n.Children
 98	if len(children) > 0 {
 99		for _, ch := range children {
100			chNodes := flatten(ch)
101			nodes = append(nodes, chNodes...)
102		}
103	}
104	return nodes
105}
106
107// !ISSUE: Need to make it skip over non modified elements
108
109func View(data *Window, width, height int32) {
110	debug := false
111	data.Document.Style["width"] = strconv.Itoa(int(width)) + "px"
112	data.Document.Style["height"] = strconv.Itoa(int(height)) + "px"
113
114	wm := window.NewWindowManager()
115	wm.FPS = true
116
117	wm.OpenWindow(width, height)
118	defer wm.CloseWindow()
119
120	evts := map[string]element.EventList{}
121
122	eventStore := &evts
123
124	state := map[string]element.State{}
125
126	shouldStop := false
127
128	// Main game loop
129	for !wm.WindowShouldClose() && !shouldStop {
130		rl.BeginDrawing()
131		if !shouldStop && debug {
132			shouldStop = true
133		}
134		// Check if the window size has changed
135		newWidth := int32(rl.GetScreenWidth())
136		newHeight := int32(rl.GetScreenHeight())
137
138		if newWidth != width || newHeight != height {
139			rl.ClearBackground(rl.RayWhite)
140			// Window has been resized, handle the event
141			width = newWidth
142			height = newHeight
143
144			data.CSS.Width = float32(width)
145			data.CSS.Height = float32(height)
146
147			data.Document.Style["width"] = strconv.Itoa(int(width)) + "px"
148			data.Document.Style["height"] = strconv.Itoa(int(height)) + "px"
149		}
150
151		eventStore = events.GetEvents(&data.Document.Children[0], &state, eventStore)
152		data.CSS.ComputeNodeStyle(&data.Document.Children[0], &state)
153		rd := data.Render(state)
154		wm.LoadTextures(rd)
155		wm.Draw(rd)
156
157		events.RunEvents(eventStore)
158
159		rl.EndDrawing()
160	}
161}
162
163func CreateNode(node *html.Node, parent *element.Node) {
164	if node.Type == html.ElementNode {
165		newNode := parent.CreateElement(node.Data)
166		for _, attr := range node.Attr {
167			if attr.Key == "class" {
168				classes := strings.Split(attr.Val, " ")
169				for _, class := range classes {
170					newNode.ClassList.Add(class)
171				}
172			} else if attr.Key == "id" {
173				newNode.Id = attr.Val
174			} else if attr.Key == "contenteditable" && (attr.Val == "" || attr.Val == "true") {
175				newNode.Properties.Editable = true
176			} else if attr.Key == "href" {
177				newNode.Href = attr.Val
178			} else if attr.Key == "src" {
179				newNode.Src = attr.Val
180			} else if attr.Key == "title" {
181				newNode.Title = attr.Val
182			} else {
183				newNode.SetAttribute(attr.Key, attr.Val)
184			}
185		}
186		newNode.InnerText = strings.TrimSpace(utils.GetInnerText(node))
187		// Recursively traverse child nodes
188		for child := node.FirstChild; child != nil; child = child.NextSibling {
189			if child.Type == html.ElementNode {
190				CreateNode(child, &newNode)
191			}
192		}
193		parent.AppendChild(newNode)
194
195	} else {
196		for child := node.FirstChild; child != nil; child = child.NextSibling {
197			if child.Type == html.ElementNode {
198				CreateNode(child, parent)
199			}
200		}
201	}
202
203}
204
205func parseHTMLFromFile(path string) ([]string, []string, *html.Node) {
206	file, _ := os.Open(path)
207	defer file.Close()
208
209	scanner := bufio.NewScanner(file)
210	var htmlContent string
211
212	for scanner.Scan() {
213		htmlContent += scanner.Text() + "\n"
214	}
215
216	htmlContent = removeHTMLComments(htmlContent)
217
218	doc, _ := html.Parse(strings.NewReader(encapsulateText(removeWhitespaceBetweenTags(htmlContent))))
219
220	// Extract stylesheet link tags and style tags
221	stylesheets := extractStylesheets(doc, filepath.Dir(path))
222	styleTags := extractStyleTags(doc)
223
224	return stylesheets, styleTags, doc
225}
226
227func extractStylesheets(n *html.Node, baseDir string) []string {
228	var stylesheets []string
229
230	var dfs func(*html.Node)
231	dfs = func(node *html.Node) {
232		if node.Type == html.ElementNode && node.Data == "link" {
233			var href string
234			isStylesheet := false
235
236			for _, attr := range node.Attr {
237				if attr.Key == "rel" && attr.Val == "stylesheet" {
238					isStylesheet = true
239				} else if attr.Key == "href" {
240					href = attr.Val
241				}
242			}
243
244			if isStylesheet {
245				resolvedHref := localizePath(baseDir, href)
246				stylesheets = append(stylesheets, resolvedHref)
247			}
248		}
249
250		for c := node.FirstChild; c != nil; c = c.NextSibling {
251			dfs(c)
252		}
253	}
254
255	dfs(n)
256	return stylesheets
257}
258
259func extractStyleTags(n *html.Node) []string {
260	var styleTags []string
261
262	var dfs func(*html.Node)
263	dfs = func(node *html.Node) {
264		if node.Type == html.ElementNode && node.Data == "style" {
265			var styleContent strings.Builder
266			for c := node.FirstChild; c != nil; c = c.NextSibling {
267				if c.Type == html.TextNode {
268					styleContent.WriteString(c.Data)
269				}
270			}
271			styleTags = append(styleTags, styleContent.String())
272		}
273
274		for c := node.FirstChild; c != nil; c = c.NextSibling {
275			dfs(c)
276		}
277	}
278
279	dfs(n)
280	return styleTags
281}
282
283func localizePath(rootPath, filePath string) string {
284	// Check if the file path has a scheme, indicating it's a URL
285	u, err := url.Parse(filePath)
286	if err == nil && u.Scheme != "" {
287		return filePath
288	}
289
290	// Join the root path and the file path to create an absolute path
291	absPath := filepath.Join(rootPath, filePath)
292
293	// If the absolute path is the same as the original path, return it
294	if absPath == filePath {
295		return filePath
296	}
297
298	return "./" + absPath
299}
300
301func encapsulateText(htmlString string) string {
302	openOpen := regexp.MustCompile(`(<\w+[^>]*>)([^<]+)(<\w+[^>]*>)`)
303	closeOpen := regexp.MustCompile(`(</\w+[^>]*>)([^<]+)(<\w+[^>]*>)`)
304	closeClose := regexp.MustCompile(`(<\/\w+[^>]*>)([^<]+)(<\/\w+[^>]*>)`)
305	a := matchFactory(openOpen)
306	t := openOpen.ReplaceAllStringFunc(htmlString, a)
307	// fmt.Println(t)
308	b := matchFactory(closeOpen)
309	u := closeOpen.ReplaceAllStringFunc(t, b)
310	// fmt.Println(u)
311	c := matchFactory(closeClose)
312	v := closeClose.ReplaceAllStringFunc(u, c)
313	// fmt.Println(v)
314	return v
315}
316
317func matchFactory(re *regexp.Regexp) func(string) string {
318	return func(match string) string {
319		submatches := re.FindStringSubmatch(match)
320		if len(submatches) != 4 {
321			return match
322		}
323
324		// Process submatches
325		if len(removeWhitespace(submatches[2])) > 0 {
326			return submatches[1] + "<notaspan>" + submatches[2] + "</notaspan>" + submatches[3]
327		} else {
328			return match
329		}
330	}
331}
332func removeWhitespace(htmlString string) string {
333	// Remove extra white space
334	reSpaces := regexp.MustCompile(`\s+`)
335	htmlString = reSpaces.ReplaceAllString(htmlString, " ")
336
337	// Trim leading and trailing white space
338	htmlString = strings.TrimSpace(htmlString)
339
340	return htmlString
341}
342
343func removeHTMLComments(htmlString string) string {
344	re := regexp.MustCompile(`<!--[\s\S]*?-->`)
345	return re.ReplaceAllString(htmlString, "")
346}
347
348// important to allow the notspans to be injected, the spaces after removing the comments cause the regexp to fail
349func removeWhitespaceBetweenTags(html string) string {
350	// Create a regular expression to match spaces between angle brackets
351	re := regexp.MustCompile(`>\s+<`)
352	// Replace all matches of spaces between angle brackets with "><"
353	return re.ReplaceAllString(html, "><")
354}