feat: Support labels for arrow 🔥 (#5723)

* feat: support arrow with text

* render arrow -> clear rect-> render text

* move bound text when linear elements move

* fix centering cursor when linear element rotated

* fix y coord when new line added and container has 3 points

* update text position when 2nd point moved

* support adding label on top of 2nd point when 3 points are present

* change linear element editor shortcut to cmd+enter and fix tests

* scale bound text points when resizing via bounding box

* ohh yeah rotation works :)

* fix coords when updating text properties

* calculate new position after rotation always from original position

* rotate the bound text by same angle as parent

* don't rotate text and make sure dimensions and coords are always calculated from original point

* hardcoding the text width for now

* Move the linear element when bound text hit

* Rotation working yaay

* consider text element angle when editing

* refactor

* update x2 coords if needed when text updated

* simplify

* consider bound text to be part of bounding box when hit

* show bounding box correctly when multiple element selected

* fix typo

* support rotating multiple elements

* support multiple element resizing

* shift bound text to mid point when odd points

* Always render linear element handles inside editor after element rendered so point is visible for bound text

* Delete bound text when point attached to it deleted

* move bound to mid segement mid point when points are even

* shift bound text when points nearby deleted and handle segment deletion

* Resize working :)

* more resize fixes

* don't update cache-its breaking delete points, look for better soln

* update mid point cache for bound elements when updated

* introduce wrapping when resizing

* wrap when resize for 2 pointer linear elements

* support adding text for linear elements with more than 3 points

* export to svg  working :)

* clip from nearest enclosing element with non transparent color if present when exporting and fill with correct color in canvas

* fix snap

* use visible elements

* Make export to svg work with Mask :)

* remove id

* mask canvas linear element area where label is added

* decide the position of bound text during render

* fix coords when editing

* fix multiple resize

* update cache when bound text version changes

* fix masking when rotated

* render text in correct position in preview

* remove unnecessary code

* fix masking when rotating linear element

* fix masking with zoom

* fix mask in preview for export

* fix offsets in export view

* fix coords on svg export

* fix mask when element rotated in svg

* enable double-click to enter text

* fix hint

* Position cursor correctly and text dimensiosn when height of element is negative

* don't allow 2 pointer linear element with bound text width to go beyond min width

* code cleanup

* fix freedraw

* Add padding

* don't show vertical align action for linear element containers

* Add specs for getBoundTextElementPosition

* more specs

* move some utils to linearElementEditor.ts

* remove only :p

* check absoulte coods in test

* Add test to hide vertical align for linear eleemnt with bound text

* improve export preview

* support labels only for arrows

* spec

* fix large texts

* fix tests

* fix zooming

* enter line editor with cmd+double click

* Allow points to move beyond min width/height for 2 pointer arrow with bound text

* fix hint for line editing

* attempt to fix arrow getting deselected

* fix hint and shortcut

* Add padding of 5px when creating bound text and add spec

* Wrap bound text when arrow binding containers moved

* Add spec

* remove

* set boundTextElementVersion to null if not present

* dont use cache when version mismatch

* Add a padding of 5px vertically when creating text

* Add box sizing content box

* Set bound elements when text element created to fix the padding

* fix zooming in editor

* fix zoom in export

* remove globalCompositeOperation and use clearRect instead of fillRect

src/element/transformHandles.ts

@@ -4,7 +4,7 @@ import {
   PointerType,
 } from "./types";
 
-import { getElementAbsoluteCoords, Bounds } from "./bounds";
+import { getElementAbsoluteCoords } from "./bounds";
 import { rotate } from "../math";
 import { AppState, Zoom } from "../types";
 import { isTextElement } from ".";
@@ -81,7 +81,7 @@ const generateTransformHandle = (
 };
 
 export const getTransformHandlesFromCoords = (
-  [x1, y1, x2, y2]: Bounds,
+  [x1, y1, x2, y2, cx, cy]: [number, number, number, number, number, number],
   angle: number,
   zoom: Zoom,
   pointerType: PointerType,
@@ -97,8 +97,6 @@ export const getTransformHandlesFromCoords = (
 
   const width = x2 - x1;
   const height = y2 - y1;
-  const cx = (x1 + x2) / 2;
-  const cy = (y1 + y2) / 2;
   const dashedLineMargin = margin / zoom.value;
   const centeringOffset = (size - DEFAULT_SPACING * 2) / (2 * zoom.value);
 
@@ -256,7 +254,7 @@ export const getTransformHandles = (
     ? DEFAULT_SPACING + 8
     : DEFAULT_SPACING;
   return getTransformHandlesFromCoords(
-    getElementAbsoluteCoords(element),
+    getElementAbsoluteCoords(element, true),
     element.angle,
     zoom,
     pointerType,