From ba34490aaed5f7c242c2b0453130fefc07d0d5d0 Mon Sep 17 00:00:00 2001
From: historia <[not public]>
Date: Mon, 29 Jun 2026 04:03:38 -0400
Subject: restructured project

---
 internal/tui/update.go | 296 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 296 insertions(+)
 create mode 100644 internal/tui/update.go

(limited to 'internal/tui/update.go')

diff --git a/internal/tui/update.go b/internal/tui/update.go
new file mode 100644
index 0000000..87e0917
--- /dev/null
+++ b/internal/tui/update.go
@@ -0,0 +1,296 @@
+package tui
+
+import (
+	"fmt"
+
+	"tui-ascii-mapper/internal/model"
+	"tui-ascii-mapper/internal/tools"
+
+	tea "github.com/charmbracelet/bubbletea"
+)
+
+func (m *AppModel) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
+	switch msg := msg.(type) {
+	case tea.WindowSizeMsg:
+		m.width = msg.Width
+		m.height = msg.Height
+		return m, nil
+
+	case mapLoadedMsg:
+		if msg.err != nil {
+			m.dialogMsg = fmt.Sprintf("Load error: %v", msg.err)
+			m.mode = model.ModeNormal
+			m.dialog = model.DialogNone
+			return m, nil
+		}
+		m.map_ = msg.data
+		m.rootMap = msg.data
+		m.undo = &model.UndoStack{}
+		m.undo.Push(m.map_)
+		m.cursor = model.Point{X: 0, Y: 0}
+		m.offset = model.Point{X: 0, Y: 0}
+		m.dialogMsg = fmt.Sprintf("Loaded %s", msg.data.Filename)
+		m.mode = model.ModeNormal
+		m.dialog = model.DialogNone
+		m.dirty = false
+		m.undoPosAtSave = m.undo.Pos()
+		return m, nil
+
+	case tea.MouseMsg:
+		return m.handleMouse(msg)
+
+	case tea.KeyMsg:
+		return m.handleKey(msg)
+	}
+
+	if m.mode == model.ModeDialog || m.mode == model.ModeTextEdit {
+		var cmd tea.Cmd
+		m.ti, cmd = m.ti.Update(msg)
+		if cmd != nil {
+			return m, cmd
+		}
+		m.textInput, cmd = m.textInput.Update(msg)
+		if cmd != nil {
+			return m, cmd
+		}
+	}
+	return m, nil
+}
+
+func (m *AppModel) handleMouse(msg tea.MouseMsg) (tea.Model, tea.Cmd) {
+	x, y := msg.X, msg.Y
+
+	if m.colorPicker != nil && m.colorPicker.Active {
+		return m.handleColorPickerMouse(msg)
+	}
+
+	isFilePicker := m.dialog == model.DialogFileSave || m.dialog == model.DialogFileOpen || m.dialog == model.DialogSaveAs || m.dialog == model.DialogOpenMap
+	if isFilePicker && m.filePicker != nil && m.filePicker.PopupY > 0 {
+		return m.handleFilePickerMouse(msg)
+	}
+
+	isPress := msg.Button == tea.MouseButtonLeft && msg.Action == tea.MouseActionPress
+	isRelease := msg.Action == tea.MouseActionRelease
+	isRightPress := msg.Button == tea.MouseButtonRight && msg.Action == tea.MouseActionPress
+
+	gridAreaW := m.width - sidebarW
+	gridH := m.height - 1
+	if m.height > 6 {
+		gridH -= 2
+	}
+	if gridH < 1 {
+		gridH = 1
+	}
+	if gridAreaW < 1 {
+		gridAreaW = 1
+	}
+
+	if isPress && y == 0 {
+		m.handleToolbarClick(x)
+		if m.quitting {
+			return m, tea.Quit
+		}
+		return m, nil
+	}
+
+	gridY := y - 1
+	onSidebar := gridAreaW > 0 && x >= gridAreaW
+
+	if isPress && onSidebar && gridY >= 0 {
+		m.handleSidebarClick(x, y)
+		return m, nil
+	}
+
+	gx := x + m.offset.X
+	gy := gridY + m.offset.Y
+	inGrid := gridY >= 0 && gridY < gridH && x < gridAreaW
+
+	if isPress {
+		m.mouseDown = true
+		m.lastPaint = model.Point{X: -1, Y: -1}
+		if inGrid {
+			p := model.Point{X: gx, Y: gy}
+			switch m.tool {
+			case model.ToolLine:
+				m.mouseStart = p
+				m.mode = model.ModeLinePreview
+				m.linePreview = nil
+			case model.ToolRect:
+				m.mouseStart = p
+				m.mode = model.ModeRectPreview
+				m.rectPreview = nil
+			case model.ToolCircle:
+				m.mouseStart = p
+				m.mode = model.ModeCirclePreview
+				m.circlePreview = nil
+			case model.ToolSelect:
+				m.cursor = p
+				m.clampCursor()
+			default:
+				return m.mouseDraw(p.X, p.Y)
+			}
+		}
+		return m, nil
+	}
+
+	if isRelease {
+		if m.mouseDown {
+			m.mouseRelease(gx, gy)
+		}
+		m.mouseDown = false
+		m.lastPaint = model.Point{X: -1, Y: -1}
+		return m, nil
+	}
+
+	if isRightPress {
+		if inGrid {
+			if m.tool == model.ToolText {
+				idx := tools.FindTextLabelAt(m.curMap(), model.Point{X: gx, Y: gy})
+				if idx >= 0 {
+					m.dirty = true
+					m.undo.Push(m.curMap())
+					tools.RemoveTextLabel(m.curMap(), m.curMap().TextLabels[idx].Start)
+					m.movingLabel = -1
+				}
+			} else {
+				m.dirty = true
+				m.undo.Push(m.curMap())
+				m.applyBrush(model.Point{X: gx, Y: gy}, true)
+				m.lastPaint = model.Point{X: gx, Y: gy}
+			}
+		}
+		return m, nil
+	}
+
+	if m.mouseDown && inGrid && (gx != m.lastPaint.X || gy != m.lastPaint.Y) {
+		if m.movingLabel >= 0 && m.tool == model.ToolText {
+			m.cursor = model.Point{X: gx, Y: gy}
+			m.clampCursor()
+		} else if m.tool == model.ToolLine {
+			m.linePreview = tools.ThickenPoints(tools.BresenhamLine(m.mouseStart, model.Point{X: gx, Y: gy}), m.brushWidth)
+			m.lastPaint = model.Point{X: gx, Y: gy}
+		} else if m.tool == model.ToolRect {
+			m.rectPreview = tools.ThickenPoints(tools.DrawRect(m.mouseStart, model.Point{X: gx, Y: gy}, m.fillShapes), m.brushWidth)
+			m.lastPaint = model.Point{X: gx, Y: gy}
+		} else if m.tool == model.ToolCircle {
+			m.circlePreview = tools.ThickenPoints(tools.DrawCircle(m.mouseStart, model.Point{X: gx, Y: gy}, m.fillShapes), m.brushWidth)
+			m.lastPaint = model.Point{X: gx, Y: gy}
+		} else if m.tool != model.ToolText {
+			m.mouseDraw(gx, gy)
+		}
+	}
+
+	switch msg.Button {
+	case tea.MouseButtonWheelUp:
+		if m.offset.Y > 0 {
+			m.offset.Y--
+		}
+	case tea.MouseButtonWheelDown:
+		maxY := m.curMap().Height - gridH
+		if maxY < 0 {
+			maxY = 0
+		}
+		if m.offset.Y < maxY {
+			m.offset.Y++
+		}
+	}
+
+	return m, nil
+}
+
+func (m *AppModel) mouseDraw(gx, gy int) (tea.Model, tea.Cmd) {
+	p := model.Point{X: gx, Y: gy}
+	switch m.tool {
+	case model.ToolBrush:
+		m.dirty = true
+		m.undo.Push(m.curMap())
+		m.applyBrush(p)
+		m.lastPaint = p
+	case model.ToolErase:
+		m.dirty = true
+		m.undo.Push(m.curMap())
+		m.applyBrush(p, true)
+		m.lastPaint = p
+	case model.ToolFill:
+		m.dirty = true
+		m.undo.Push(m.curMap())
+		m.fillAt(p)
+		m.lastPaint = p
+	case model.ToolText:
+		idx := tools.FindTextLabelAt(m.curMap(), p)
+		if idx >= 0 {
+			m.movingLabel = idx
+			tl := m.curMap().TextLabels[idx]
+			m.dragLabelOrigin = tl.Start
+			m.dragMouseOrigin = p
+			m.lastPaint = p
+		}
+	}
+	m.cursor = p
+	m.clampCursor()
+	return m, nil
+}
+
+func (m *AppModel) mouseRelease(gx, gy int) {
+	p := model.Point{X: gx, Y: gy}
+	switch m.tool {
+	case model.ToolLine:
+		m.dirty = true
+		m.undo.Push(m.curMap())
+		m.finishShape(m.mouseStart, p, model.ToolLine)
+		m.linePreview = nil
+		m.mode = model.ModeNormal
+	case model.ToolRect:
+		m.dirty = true
+		m.undo.Push(m.curMap())
+		m.finishShape(m.mouseStart, p, model.ToolRect)
+		m.rectPreview = nil
+		m.mode = model.ModeNormal
+	case model.ToolCircle:
+		m.dirty = true
+		m.undo.Push(m.curMap())
+		m.finishShape(m.mouseStart, p, model.ToolCircle)
+		m.circlePreview = nil
+		m.mode = model.ModeNormal
+	case model.ToolText:
+		if m.movingLabel >= 0 && m.movingLabel < len(m.curMap().TextLabels) {
+			old := m.curMap().TextLabels[m.movingLabel].Start
+			newPos := m.labelDragPos()
+			if old != newPos && m.curMap().InBounds(newPos) {
+				m.dirty = true
+				m.undo.Push(m.curMap())
+				tools.MoveTextLabel(m.curMap(), old, newPos)
+				m.movingLabel = -1
+			} else {
+				m.startTextEditText(m.movingLabel)
+			}
+		} else if m.cursor == p && m.curMap().InBounds(p) {
+			m.startTextEdit(p)
+		}
+		m.dragLabelOrigin = model.Point{X: 0, Y: 0}
+		m.dragMouseOrigin = model.Point{X: 0, Y: 0}
+	}
+}
+
+func (m *AppModel) finishShape(a, b model.Point, tool model.Tool) {
+	palette := m.curPalette()
+	terrain := m.selected
+	if terrain < 0 || terrain >= len(palette) {
+		return
+	}
+	var pts []model.Point
+	switch tool {
+	case model.ToolLine:
+		pts = tools.BresenhamLine(a, b)
+	case model.ToolRect:
+		pts = tools.DrawRect(a, b, m.fillShapes)
+	case model.ToolCircle:
+		pts = tools.DrawCircle(a, b, m.fillShapes)
+	}
+	tools.ApplyPoints(m.curMap(), pts, terrain, palette)
+	if m.brushWidth > 1 {
+		for _, pt := range pts {
+			tools.Brush(m.curMap(), pt, terrain, m.brushWidth, palette)
+		}
+	}
+}
-- 
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