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Add support for image trimming #11

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Add support for image trimming #11

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36 changes: 36 additions & 0 deletions index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,7 @@ function Thumbor(securityKey, thumborServerUrl) {
this.valignValue = null;
this.cropValues = null;
this.meta = false;
this.trimValue = null;
this.filtersCalls = [];
}

Expand All @@ -34,6 +35,9 @@ Thumbor.prototype = {
CENTER: 'center',
LEFT: 'left',

TOP_LEFT: 'top-left',
BOTTOM_RIGHT: 'bottom-right',

/**
* Set path of image
* @param {String} imagePath [description]
Expand Down Expand Up @@ -75,6 +79,10 @@ Thumbor.prototype = {
parts.push('meta');
}

if (this.trimValue) {
parts.push(this.trimValue);
}

if (this.cropValues) {
parts.push(
this.cropValues.left +
Expand Down Expand Up @@ -130,6 +138,34 @@ Thumbor.prototype = {

return parts;
},
/**
* Removes surrounding space in images using top-left pixel color unless specified otherwise.
* Overrides any previous call to `trim`.
* @param {String} orientation 'top-left', 'bottom-right'
* @param {Integer} tolerance between 0 and 442
*/
trim: function(orientation, tolerance) {
var trimOpts = ['trim'];

if (orientation !== undefined) {
if (orientation === this.TOP_LEFT || orientation === this.BOTTOM_RIGHT) {
trimOpts.push(orientation);
} else {
throw new Error('Orientation must be top-left or bottom-right.');
}
}

if (tolerance !== undefined) {
if (tolerance > 0 && tolerance < 442) {
trimOpts.push(tolerance);
} else {
throw new Error('Tolerance must be between 0 and 442.');
}
}

this.trimValue = trimOpts.join(':');
return this;
},
/**
* Resize the image to the specified dimensions. Overrides any previous call
* to `fitIn` or `resize`.
Expand Down