feat(webview): add IPC message types and own types

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

pkg/webview/messages.go

@@ -0,0 +1,171 @@
+// pkg/webview/messages.go
+package webview
+
+import "time"
+
+// --- Queries (read-only) ---
+
+// QueryURL gets the current page URL. Result: string
+type QueryURL struct{ Window string `json:"window"` }
+
+// QueryTitle gets the current page title. Result: string
+type QueryTitle struct{ Window string `json:"window"` }
+
+// QueryConsole gets captured console messages. Result: []ConsoleMessage
+type QueryConsole struct {
+	Window string `json:"window"`
+	Level  string `json:"level,omitempty"` // filter by type: "log", "warn", "error", "info", "debug"
+	Limit  int    `json:"limit,omitempty"` // max messages (0 = all)
+}
+
+// QuerySelector finds a single element. Result: *ElementInfo (nil if not found)
+type QuerySelector struct {
+	Window   string `json:"window"`
+	Selector string `json:"selector"`
+}
+
+// QuerySelectorAll finds all matching elements. Result: []*ElementInfo
+type QuerySelectorAll struct {
+	Window   string `json:"window"`
+	Selector string `json:"selector"`
+}
+
+// QueryDOMTree gets HTML content. Result: string (outerHTML)
+type QueryDOMTree struct {
+	Window   string `json:"window"`
+	Selector string `json:"selector,omitempty"` // empty = full document
+}
+
+// --- Tasks (side-effects) ---
+
+// TaskEvaluate executes JavaScript. Result: any (JS return value)
+type TaskEvaluate struct {
+	Window string `json:"window"`
+	Script string `json:"script"`
+}
+
+// TaskClick clicks an element. Result: nil
+type TaskClick struct {
+	Window   string `json:"window"`
+	Selector string `json:"selector"`
+}
+
+// TaskType types text into an element. Result: nil
+type TaskType struct {
+	Window   string `json:"window"`
+	Selector string `json:"selector"`
+	Text     string `json:"text"`
+}
+
+// TaskNavigate navigates to a URL. Result: nil
+type TaskNavigate struct {
+	Window string `json:"window"`
+	URL    string `json:"url"`
+}
+
+// TaskScreenshot captures the page as PNG. Result: ScreenshotResult
+type TaskScreenshot struct{ Window string `json:"window"` }
+
+// TaskScroll scrolls to an absolute position (window.scrollTo). Result: nil
+type TaskScroll struct {
+	Window string `json:"window"`
+	X      int    `json:"x"`
+	Y      int    `json:"y"`
+}
+
+// TaskHover hovers over an element. Result: nil
+type TaskHover struct {
+	Window   string `json:"window"`
+	Selector string `json:"selector"`
+}
+
+// TaskSelect selects an option in a <select> element. Result: nil
+type TaskSelect struct {
+	Window   string `json:"window"`
+	Selector string `json:"selector"`
+	Value    string `json:"value"`
+}
+
+// TaskCheck checks/unchecks a checkbox. Result: nil
+type TaskCheck struct {
+	Window   string `json:"window"`
+	Selector string `json:"selector"`
+	Checked  bool   `json:"checked"`
+}
+
+// TaskUploadFile uploads files to an input element. Result: nil
+type TaskUploadFile struct {
+	Window   string   `json:"window"`
+	Selector string   `json:"selector"`
+	Paths    []string `json:"paths"`
+}
+
+// TaskSetViewport sets the viewport dimensions. Result: nil
+type TaskSetViewport struct {
+	Window string `json:"window"`
+	Width  int    `json:"width"`
+	Height int    `json:"height"`
+}
+
+// TaskClearConsole clears captured console messages. Result: nil
+type TaskClearConsole struct{ Window string `json:"window"` }
+
+// --- Actions (broadcast) ---
+
+// ActionConsoleMessage is broadcast when a console message is captured.
+type ActionConsoleMessage struct {
+	Window  string         `json:"window"`
+	Message ConsoleMessage `json:"message"`
+}
+
+// ActionException is broadcast when a JavaScript exception occurs.
+type ActionException struct {
+	Window    string        `json:"window"`
+	Exception ExceptionInfo `json:"exception"`
+}
+
+// --- Types ---
+
+// ConsoleMessage represents a browser console message.
+type ConsoleMessage struct {
+	Type      string    `json:"type"` // "log", "warn", "error", "info", "debug"
+	Text      string    `json:"text"`
+	Timestamp time.Time `json:"timestamp"`
+	URL       string    `json:"url,omitempty"`
+	Line      int       `json:"line,omitempty"`
+	Column    int       `json:"column,omitempty"`
+}
+
+// ElementInfo represents a DOM element.
+type ElementInfo struct {
+	TagName     string            `json:"tagName"`
+	Attributes  map[string]string `json:"attributes,omitempty"`
+	InnerText   string            `json:"innerText,omitempty"`
+	InnerHTML   string            `json:"innerHTML,omitempty"`
+	BoundingBox *BoundingBox      `json:"boundingBox,omitempty"`
+}
+
+// BoundingBox represents element position and size.
+type BoundingBox struct {
+	X      float64 `json:"x"`
+	Y      float64 `json:"y"`
+	Width  float64 `json:"width"`
+	Height float64 `json:"height"`
+}
+
+// ExceptionInfo represents a JavaScript exception.
+// Field mapping from go-webview: LineNumber->Line, ColumnNumber->Column.
+type ExceptionInfo struct {
+	Text       string    `json:"text"`
+	URL        string    `json:"url,omitempty"`
+	Line       int       `json:"line,omitempty"`
+	Column     int       `json:"column,omitempty"`
+	StackTrace string    `json:"stackTrace,omitempty"`
+	Timestamp  time.Time `json:"timestamp"`
+}
+
+// ScreenshotResult wraps raw PNG bytes as base64 for JSON/MCP transport.
+type ScreenshotResult struct {
+	Base64   string `json:"base64"`
+	MimeType string `json:"mimeType"` // always "image/png"
+}