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	state["ROOT"] = element.State{
127		Style: map[string]string{
128			"width":  strconv.Itoa(int(width)) + "px",
129			"height": strconv.Itoa(int(height)) + "px",
130		},
131	}
132
133	shouldStop := false
134
135	// Main game loop
136	for !wm.WindowShouldClose() && !shouldStop {
137		rl.BeginDrawing()
138		if !shouldStop && debug {
139			shouldStop = true
140		}
141		// Check if the window size has changed
142		newWidth := int32(rl.GetScreenWidth())
143		newHeight := int32(rl.GetScreenHeight())
144
145		if newWidth != width || newHeight != height {
146			rl.ClearBackground(rl.RayWhite)
147			// Window has been resized, handle the event
148			width = newWidth
149			height = newHeight
150
151			data.CSS.Width = float32(width)
152			data.CSS.Height = float32(height)
153
154			state["ROOT"].Style["width"] = strconv.Itoa(int(width)) + "px"
155			state["ROOT"].Style["height"] = strconv.Itoa(int(height)) + "px"
156		}
157
158		eventStore = events.GetEvents(&data.Document.Children[0], &state, eventStore)
159		data.CSS.ComputeNodeStyle(&data.Document.Children[0], &state)
160		rd := data.Render(state)
161		wm.LoadTextures(rd)
162		wm.Draw(rd)
163
164		events.RunEvents(eventStore)
165
166		rl.EndDrawing()
167	}
168}
169
170func CreateNode(node *html.Node, parent *element.Node) {
171	if node.Type == html.ElementNode {
172		newNode := parent.CreateElement(node.Data)
173		for _, attr := range node.Attr {
174			if attr.Key == "class" {
175				classes := strings.Split(attr.Val, " ")
176				for _, class := range classes {
177					newNode.ClassList.Add(class)
178				}
179			} else if attr.Key == "id" {
180				newNode.Id = attr.Val
181			} else if attr.Key == "contenteditable" && (attr.Val == "" || attr.Val == "true") {
182				newNode.Properties.Editable = true
183			} else if attr.Key == "href" {
184				newNode.Href = attr.Val
185			} else if attr.Key == "src" {
186				newNode.Src = attr.Val
187			} else if attr.Key == "title" {
188				newNode.Title = attr.Val
189			} else {
190				newNode.SetAttribute(attr.Key, attr.Val)
191			}
192		}
193		newNode.InnerText = strings.TrimSpace(utils.GetInnerText(node))
194		// Recursively traverse child nodes
195		for child := node.FirstChild; child != nil; child = child.NextSibling {
196			if child.Type == html.ElementNode {
197				CreateNode(child, &newNode)
198			}
199		}
200		parent.AppendChild(newNode)
201
202	} else {
203		for child := node.FirstChild; child != nil; child = child.NextSibling {
204			if child.Type == html.ElementNode {
205				CreateNode(child, parent)
206			}
207		}
208	}
209
210}
211
212func parseHTMLFromFile(path string) ([]string, []string, *html.Node) {
213	file, _ := os.Open(path)
214	defer file.Close()
215
216	scanner := bufio.NewScanner(file)
217	var htmlContent string
218
219	for scanner.Scan() {
220		htmlContent += scanner.Text() + "\n"
221	}
222
223	htmlContent = removeHTMLComments(htmlContent)
224
225	doc, _ := html.Parse(strings.NewReader(encapsulateText(removeWhitespaceBetweenTags(htmlContent))))
226
227	// Extract stylesheet link tags and style tags
228	stylesheets := extractStylesheets(doc, filepath.Dir(path))
229	styleTags := extractStyleTags(doc)
230
231	return stylesheets, styleTags, doc
232}
233
234func extractStylesheets(n *html.Node, baseDir string) []string {
235	var stylesheets []string
236
237	var dfs func(*html.Node)
238	dfs = func(node *html.Node) {
239		if node.Type == html.ElementNode && node.Data == "link" {
240			var href string
241			isStylesheet := false
242
243			for _, attr := range node.Attr {
244				if attr.Key == "rel" && attr.Val == "stylesheet" {
245					isStylesheet = true
246				} else if attr.Key == "href" {
247					href = attr.Val
248				}
249			}
250
251			if isStylesheet {
252				resolvedHref := localizePath(baseDir, href)
253				stylesheets = append(stylesheets, resolvedHref)
254			}
255		}
256
257		for c := node.FirstChild; c != nil; c = c.NextSibling {
258			dfs(c)
259		}
260	}
261
262	dfs(n)
263	return stylesheets
264}
265
266func extractStyleTags(n *html.Node) []string {
267	var styleTags []string
268
269	var dfs func(*html.Node)
270	dfs = func(node *html.Node) {
271		if node.Type == html.ElementNode && node.Data == "style" {
272			var styleContent strings.Builder
273			for c := node.FirstChild; c != nil; c = c.NextSibling {
274				if c.Type == html.TextNode {
275					styleContent.WriteString(c.Data)
276				}
277			}
278			styleTags = append(styleTags, styleContent.String())
279		}
280
281		for c := node.FirstChild; c != nil; c = c.NextSibling {
282			dfs(c)
283		}
284	}
285
286	dfs(n)
287	return styleTags
288}
289
290func localizePath(rootPath, filePath string) string {
291	// Check if the file path has a scheme, indicating it's a URL
292	u, err := url.Parse(filePath)
293	if err == nil && u.Scheme != "" {
294		return filePath
295	}
296
297	// Join the root path and the file path to create an absolute path
298	absPath := filepath.Join(rootPath, filePath)
299
300	// If the absolute path is the same as the original path, return it
301	if absPath == filePath {
302		return filePath
303	}
304
305	return "./" + absPath
306}
307
308func encapsulateText(htmlString string) string {
309	openOpen := regexp.MustCompile(`(<\w+[^>]*>)([^<]+)(<\w+[^>]*>)`)
310	closeOpen := regexp.MustCompile(`(</\w+[^>]*>)([^<]+)(<\w+[^>]*>)`)
311	closeClose := regexp.MustCompile(`(<\/\w+[^>]*>)([^<]+)(<\/\w+[^>]*>)`)
312	a := matchFactory(openOpen)
313	t := openOpen.ReplaceAllStringFunc(htmlString, a)
314	// fmt.Println(t)
315	b := matchFactory(closeOpen)
316	u := closeOpen.ReplaceAllStringFunc(t, b)
317	// fmt.Println(u)
318	c := matchFactory(closeClose)
319	v := closeClose.ReplaceAllStringFunc(u, c)
320	// fmt.Println(v)
321	return v
322}
323
324func matchFactory(re *regexp.Regexp) func(string) string {
325	return func(match string) string {
326		submatches := re.FindStringSubmatch(match)
327		if len(submatches) != 4 {
328			return match
329		}
330
331		// Process submatches
332		if len(removeWhitespace(submatches[2])) > 0 {
333			return submatches[1] + "<notaspan>" + submatches[2] + "</notaspan>" + submatches[3]
334		} else {
335			return match
336		}
337	}
338}
339func removeWhitespace(htmlString string) string {
340	// Remove extra white space
341	reSpaces := regexp.MustCompile(`\s+`)
342	htmlString = reSpaces.ReplaceAllString(htmlString, " ")
343
344	// Trim leading and trailing white space
345	htmlString = strings.TrimSpace(htmlString)
346
347	return htmlString
348}
349
350func removeHTMLComments(htmlString string) string {
351	re := regexp.MustCompile(`<!--[\s\S]*?-->`)
352	return re.ReplaceAllString(htmlString, "")
353}
354
355// important to allow the notspans to be injected, the spaces after removing the comments cause the regexp to fail
356func removeWhitespaceBetweenTags(html string) string {
357	// Create a regular expression to match spaces between angle brackets
358	re := regexp.MustCompile(`>\s+<`)
359	// Replace all matches of spaces between angle brackets with "><"
360	return re.ReplaceAllString(html, "><")
361}