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danfragoso · Jul 29, 2019 · 336ad6a · 336ad6a
commit 336ad6a
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diff --git a/README.md b/README.md
@@ -0,0 +1,3 @@
+<p align="center">
+  <img src="thdwb.png?raw=true"></img>
+</p>
diff --git a/index.html b/index.html
@@ -0,0 +1,25 @@
+<html>
+
+<head>
+  <title>Hello, world!</title>
+</head>
+
+<body>
+  <h1>Hello, world!</h1>
+  <p>Lorem ipsum, dolor sit amet.</p>
+  <div>
+    <p>Lorem ipsum, dolor sit amet.</p>
+    <div>
+      DIV
+      <h2>
+        opa
+      </h2>
+    </div>
+  </div>
+  <div>
+    <p>Lorem ipsum, dolor sit amet.</p>
+    <h1>Hello, world!</h1>
+  </div>
+</body>
+
+</html>
diff --git a/ketchup/ketchup.go b/ketchup/ketchup.go
@@ -0,0 +1,70 @@
+package ketchup
+
+import "regexp"
+import "strings"
+
+var xmlTag = regexp.MustCompile(`(\<\w+\>)|(\<//?\w+\>\\?)`)
+var	clTag = regexp.MustCompile(`\<\/\w+\>`)
+var tagContent = regexp.MustCompile(`(.+?)\<\/`)
+
+type DOM_Node struct {
+	Element string `json:"element"`
+	Content string `json:"content"`
+	Children []*DOM_Node `json:"children"`
+	parent *DOM_Node
+}
+
+func ParseHTML(document string) *DOM_Node {
+	DOM_Tree := &DOM_Node{
+		Element: "root",
+		Content: "THDWB",
+		Children: []*DOM_Node{},
+		parent: nil,
+	}
+
+	lastNode := DOM_Tree
+	parseDocument := xmlTag.MatchString(document)
+	document = strings.ReplaceAll(document, "\n", "")
+
+	for parseDocument == true {
+		var currentNode *DOM_Node
+
+		currentTag := xmlTag.FindString(document)
+		currentTagIndex := xmlTag.FindStringIndex(document)
+
+		if clTag.MatchString(currentTag) {
+			contentStringMatch := tagContent.FindStringSubmatch(document)
+			contentString := ""
+
+			if len(contentStringMatch) > 1 {
+				contentString = contentStringMatch[1]
+			}
+
+			if clTag.MatchString(contentString) {
+				lastNode.Content = ""
+			} else {
+				lastNode.Content = strings.TrimSpace(contentString)
+			}
+
+			lastNode = lastNode.parent
+		} else {
+			currentNode = &DOM_Node{
+				Element: strings.Trim(currentTag, "></"),
+				Content: "",
+				Children: []*DOM_Node{},
+				parent: lastNode,
+			}
+
+			lastNode.Children = append(lastNode.Children, currentNode)
+			lastNode = currentNode
+		}
+
+		document = document[currentTagIndex[1] : len(document)]
+
+		if !xmlTag.MatchString(document) {
+			parseDocument = false
+		}
+	}
+
+	return DOM_Tree
+}
diff --git a/main.go b/main.go
@@ -0,0 +1,22 @@
+package main
+
+import "os"
+import "fmt"
+import "encoding/json"
+
+import "github.com/danfragoso/thdwb/mustard"
+import "github.com/danfragoso/thdwb/ketchup"
+import "github.com/danfragoso/thdwb/sauce"
+
+func main() {
+	url := os.Args[1]
+
+	resource := sauce.GetResource(url)
+	bodyString := string(resource.Body)
+
+	DOM_Tree := ketchup.ParseHTML(bodyString)
+	js, err := json.MarshalIndent(DOM_Tree, "", " ")
+	fmt.Println(err)
+	fmt.Println(string(js))
+	mustard.RenderDOM(DOM_Tree)
+}
diff --git a/mustard/mustard.go b/mustard/mustard.go
@@ -0,0 +1,60 @@
+package mustard
+
+import "github.com/gotk3/gotk3/cairo"
+import "github.com/gotk3/gotk3/gdk"
+import "github.com/gotk3/gotk3/gtk"
+import "github.com/danfragoso/thdwb/ketchup"
+import "log"
+
+const KEY_LEFT  uint = 65361
+const KEY_UP    uint = 65362
+const KEY_RIGHT uint = 65363
+const KEY_DOWN  uint = 65364
+
+func RenderDOM(DOM_Tree *ketchup.DOM_Node) {
+	gtk.Init(nil)
+
+	browserWindow, _ := gtk.WindowNew(gtk.WINDOW_TOPLEVEL)
+	drawingArea, _ := gtk.DrawingAreaNew()
+
+	browserWindow.Add(drawingArea)
+
+	header, err := gtk.HeaderBarNew()
+	if err != nil {
+		log.Fatal("Could not create header bar:", err)
+	}
+
+	header.SetShowCloseButton(true)
+	header.SetTitle(DOM_Tree.Content)
+	header.SetSubtitle("thdwb")
+
+	browserWindow.SetTitlebar(header)
+	browserWindow.Connect("destroy", gtk.MainQuit)
+	browserWindow.ShowAll()
+
+	unitSize := 20.0
+	x := 0.0
+	y := 0.0
+	keyMap := map[uint]func(){
+		KEY_LEFT:  func() { x-- },
+		KEY_UP:    func() { y-- },
+		KEY_RIGHT: func() { x++ },
+		KEY_DOWN:  func() { y++ },
+	}
+
+	drawingArea.Connect("draw", func(drawingArea *gtk.DrawingArea, cr *cairo.Context) {
+		cr.SetSourceRGB(0, 0, 0)
+		cr.Rectangle(x*unitSize, y*unitSize, unitSize, unitSize)
+		cr.Fill()
+	})
+
+	browserWindow.Connect("key-press-event", func(browserWindow *gtk.Window, ev *gdk.Event) {
+		keyEvent := &gdk.EventKey{ev}
+		if move, found := keyMap[keyEvent.KeyVal()]; found {
+			move()
+			browserWindow.QueueDraw()
+		}
+	})
+
+	gtk.Main()
+}
diff --git a/sauce/sauce.go b/sauce/sauce.go
@@ -0,0 +1,26 @@
+package sauce
+
+import "io/ioutil"
+import "net/http"
+
+type Resource struct {
+	Body string
+	Code int
+}
+
+func GetResource(url string) *Resource {
+	res, err := http.Get(url)
+	if err != nil {
+		panic(err)
+	}
+
+	defer res.Body.Close()
+	body, err := ioutil.ReadAll(res.Body)
+	if err != nil {
+		panic(err)
+	}
+
+	return &Resource{
+		Body: string(body),
+	}
+}
diff --git a/thdwb.png b/thdwb.png