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Clean-up the PDFViewer.{increaseScale, decreaseScale} methods

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The signatures of these methods were changed in PR 15886, which has now been included in a couple of releases, hence it should hopefully be OK to remove the fallback code-paths now.
Also, the methods are updated slightly to be explicit about what options are supported and we'll no longer pass along any arbitrary options to the "private" methods.
This commit is contained in:
Jonas Jenwald 2023-03-19 11:11:56 +01:00
parent 9db4509664
commit 9060757064
1 changed files with 21 additions and 46 deletions
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67
web/pdf_viewer.js
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@ -2003,83 +2003,58 @@ class PDFViewer {
}
/**
* Increase the current zoom level one, or more, times.
* @param {Object|null} [options]
* @typedef {Object} ChangeScaleOptions
* @property {number} [drawingDelay]
* @property {number} [scaleFactor]
* @property {number} [steps]
*/
increaseScale(options = null) {
if (
(typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")) &&
typeof options === "number"
) {
console.error(
"The `increaseScale` method-signature was updated, please use an object instead."
);
options = { steps: options };
}
/**
* Increase the current zoom level one, or more, times.
* @param {ChangeScaleOptions} [options]
*/
increaseScale({ drawingDelay, scaleFactor, steps } = {}) {
if (!this.pdfDocument) {
return;
}
options ||= Object.create(null);
let newScale = this._currentScale;
if (options.scaleFactor > 1) {
if (scaleFactor > 1) {
newScale = Math.min(
MAX_SCALE,
Math.round(newScale * options.scaleFactor * 100) / 100
Math.round(newScale * scaleFactor * 100) / 100
);
} else {
let steps = options.steps ?? 1;
steps ??= 1;
do {
newScale = (newScale * DEFAULT_SCALE_DELTA).toFixed(2);
newScale = Math.ceil(newScale * 10) / 10;
newScale = Math.min(MAX_SCALE, newScale);
newScale = Math.min(MAX_SCALE, Math.ceil(newScale * 10) / 10);
} while (--steps > 0 && newScale < MAX_SCALE);
}
options.noScroll = false;
this._setScale(newScale, options);
this._setScale(newScale, { noScroll: false, drawingDelay });
}
/**
* Decrease the current zoom level one, or more, times.
* @param {Object|null} [options]
* @param {ChangeScaleOptions} [options]
*/
decreaseScale(options = null) {
if (
(typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")) &&
typeof options === "number"
) {
console.error(
"The `decreaseScale` method-signature was updated, please use an object instead."
);
options = { steps: options };
}
decreaseScale({ drawingDelay, scaleFactor, steps } = {}) {
if (!this.pdfDocument) {
return;
}
options ||= Object.create(null);
let newScale = this._currentScale;
if (options.scaleFactor > 0 && options.scaleFactor < 1) {
if (scaleFactor > 0 && scaleFactor < 1) {
newScale = Math.max(
MIN_SCALE,
Math.round(newScale * options.scaleFactor * 100) / 100
Math.round(newScale * scaleFactor * 100) / 100
);
} else {
let steps = options.steps ?? 1;
steps ??= 1;
do {
newScale = (newScale / DEFAULT_SCALE_DELTA).toFixed(2);
newScale = Math.floor(newScale * 10) / 10;
newScale = Math.max(MIN_SCALE, newScale);
newScale = Math.max(MIN_SCALE, Math.floor(newScale * 10) / 10);
} while (--steps > 0 && newScale > MIN_SCALE);
}
options.noScroll = false;
this._setScale(newScale, options);
this._setScale(newScale, { noScroll: false, drawingDelay });
}
#updateContainerHeightCss(height = this.container.clientHeight) {