From 36cc25edb8f736734795363947cbbbb3471747ca Mon Sep 17 00:00:00 2001
From: Devine Lu Linvega <aliceffekt@gmail.com>
Date: Thu, 22 Nov 2018 11:14:57 +1200
Subject: [PATCH] Added multi/drag/copy

---
 desktop/sources/scripts/cursor.js |  8 +++---
 desktop/sources/scripts/tool.js   | 46 ++++++++++++++++++++++++++-----
 2 files changed, 43 insertions(+), 11 deletions(-)

diff --git a/desktop/sources/scripts/cursor.js b/desktop/sources/scripts/cursor.js
index 4ecae4b..3204e46 100644
--- a/desktop/sources/scripts/cursor.js
+++ b/desktop/sources/scripts/cursor.js
@@ -5,8 +5,8 @@ DOTGRID.Cursor = function () {
   this.translation = null
   this.operation = null
 
-  this.translate = function (from = null, to = null, multi = false) {
-    if ((from || to) && this.translation == null) { this.translation = { multi: multi }; console.log('Begin translation') }
+  this.translate = function (from = null, to = null, multi = false, copy = false) {
+    if ((from || to) && this.translation == null) { this.translation = { multi: multi, copy: copy }; console.log('Begin translation', multi, copy) }
 
     if (from) { this.translation.from = from }
     if (to) { this.translation.to = to }
@@ -21,7 +21,7 @@ DOTGRID.Cursor = function () {
 
     // Translation
     if (DOTGRID.tool.vertex_at(this.pos)) {
-      this.translate(this.pos, this.pos, e.shiftKey)
+      this.translate(this.pos, this.pos, e.shiftKey, e.ctrlKey || e.metaKey)
     }
 
     DOTGRID.guide.update()
@@ -55,7 +55,7 @@ DOTGRID.Cursor = function () {
     if (e.altKey) { DOTGRID.tool.remove_segments_at(this.pos); this.translate(); return }
 
     if (this.translation && !is_equal(this.translation.from, this.translation.to)) {
-      if (this.translation.multi) { DOTGRID.tool.translate_multi(this.translation.from, this.translation.to) } else { DOTGRID.tool.translate(this.translation.from, this.translation.to) }
+      if (this.translation.copy) { DOTGRID.tool.translate_copy(this.translation.from, this.translation.to) } else if (this.translation.multi) { DOTGRID.tool.translate_multi(this.translation.from, this.translation.to) } else { DOTGRID.tool.translate(this.translation.from, this.translation.to) }
     } else if (e.target.id == 'guide') {
       DOTGRID.tool.add_vertex({ x: this.pos.x, y: this.pos.y })
       DOTGRID.picker.stop()
diff --git a/desktop/sources/scripts/tool.js b/desktop/sources/scripts/tool.js
index 74fb2d3..7300f93 100644
--- a/desktop/sources/scripts/tool.js
+++ b/desktop/sources/scripts/tool.js
@@ -109,6 +109,20 @@ DOTGRID.Tool = function () {
     DOTGRID.interface.update(true)
   }
 
+  this.select_segment_at = function (pos, source = this.layer()) {
+    let target_segment = null
+    for (const segment_id in source) {
+      let segment = source[segment_id]
+      for (const vertex_id in segment.vertices) {
+        let vertex = segment.vertices[vertex_id]
+        if (vertex.x == Math.abs(pos.x) && vertex.y == Math.abs(pos.y)) {
+          return segment
+        }
+      }
+    }
+    return null
+  }
+
   this.add_vertex = function (pos) {
     pos = { x: Math.abs(pos.x), y: Math.abs(pos.y) }
     this.vertices.push(pos)
@@ -245,15 +259,33 @@ DOTGRID.Tool = function () {
   }
 
   this.translate_multi = function (a, b) {
-    let offset = { x: a.x - b.x, y: a.y - b.y }
+    const offset = { x: a.x - b.x, y: a.y - b.y }
+    const segment = this.select_segment_at(a)
 
-    for (const segment_id in this.layer()) {
-      let segment = this.layer()[segment_id]
-      for (const vertex_id in segment.vertices) {
-        let vertex = segment.vertices[vertex_id]
-        segment.vertices[vertex_id] = { x: vertex.x - offset.x, y: vertex.y - offset.y }
-      }
+    if (!segment) { return }
+
+    for (const vertex_id in segment.vertices) {
+      let vertex = segment.vertices[vertex_id]
+      segment.vertices[vertex_id] = { x: vertex.x - offset.x, y: vertex.y - offset.y }
     }
+
+    DOTGRID.history.push(this.layers)
+    this.clear()
+    DOTGRID.guide.update()
+  }
+
+  this.translate_copy = function (a, b) {
+    const offset = { x: a.x - b.x, y: a.y - b.y }
+    const segment = this.select_segment_at(a, copy(this.layer()))
+
+    if (!segment) { return }
+
+    for (const vertex_id in segment.vertices) {
+      let vertex = segment.vertices[vertex_id]
+      segment.vertices[vertex_id] = { x: vertex.x - offset.x, y: vertex.y - offset.y }
+    }
+    this.layer().push(segment)
+
     DOTGRID.history.push(this.layers)
     this.clear()
     DOTGRID.guide.update()