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