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import ImageBadge from '../image_badge';
export function resizeCoordinatesToImageElement(imageEl, meta) {
const { x, y, width, height } = meta;
const imageWidth = imageEl.width;
const imageHeight = imageEl.height;
const widthRatio = imageWidth / width;
const heightRatio = imageHeight / height;
return {
x: Math.round(x * widthRatio),
y: Math.round(y * heightRatio),
width: imageWidth,
height: imageHeight,
};
}
export function generateBadgeFromDiscussionDOM(imageFrameEl, discussionEl) {
const position = JSON.parse(discussionEl.dataset.position);
const firstNoteEl = discussionEl.querySelector('.note');
const badge = new ImageBadge({
actual: position,
imageEl: imageFrameEl.querySelector('img'),
noteId: firstNoteEl.id,
discussionId: discussionEl.dataset.discussionId,
});
return badge;
}
export function getTargetSelection(event) {
const containerEl = event.currentTarget;
const imageEl = containerEl.querySelector('img');
const x = event.offsetX;
const y = event.offsetY;
const { width, height } = imageEl;
const actualWidth = imageEl.naturalWidth;
const actualHeight = imageEl.naturalHeight;
const widthRatio = actualWidth / width;
const heightRatio = actualHeight / height;
// Browser will include the frame as a clickable target,
// which would result in potential 1px out of bounds value
// This bound the coordinates to inside the frame
const normalizedX = Math.max(0, x) && Math.min(x, width);
const normalizedY = Math.max(0, y) && Math.min(y, height);
return {
browser: {
x: normalizedX,
y: normalizedY,
width,
height,
},
actual: {
// Round x, y so that we don't need to deal with decimals
x: Math.round(normalizedX * widthRatio),
y: Math.round(normalizedY * heightRatio),
width: actualWidth,
height: actualHeight,
},
};
}
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