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GUAC-647: Fix auto-fit logic - calculations weren't properly handling very small displays (like 1x1 or 0x0).

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This commit is contained in:
Michael Jumper
2014-04-24 16:30:57 -07:00
parent ed5b3cd886
commit 9c6d78d5d4
1 changed files with 14 additions and 11 deletions
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25
guacamole/src/main/webapp/scripts/client-ui.js
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@@ -799,22 +799,25 @@ GuacUI.Client.setScale = function(new_scale) {
*/
GuacUI.Client.updateDisplayScale = function() {
// Currently attacched client
// Determine whether display is currently fit to the screen
var guac = GuacUI.Client.attachedClient;
var auto_fit = (guac.getScale() === GuacUI.Client.min_zoom);
// Calculate scale to fit screen
var min_zoom = Math.min(
window.innerWidth / guac.getWidth(),
window.innerHeight / guac.getHeight()
GuacUI.Client.min_zoom = Math.min(
window.innerWidth / Math.max(guac.getWidth(), 1),
window.innerHeight / Math.max(guac.getHeight(), 1)
);
// Clamp scale to minimum zoom level, keep at minimum zoom if at minimum zoom before
if (guac.getScale() < min_zoom || guac.getScale() === GuacUI.Client.min_zoom) {
GuacUI.Client.min_zoom = min_zoom;
GuacUI.Client.setScale(min_zoom);
}
else
GuacUI.Client.min_zoom = min_zoom;
// Calculate appropriate maximum zoom level
GuacUI.Client.max_zoom = Math.max(GuacUI.Client.min_zoom, 3);
// Clamp zoom level, maintain auto-fit
if (guac.getScale() < GuacUI.Client.min_zoom || auto_fit)
GuacUI.Client.setScale(GuacUI.Client.min_zoom);
else if (guac.getScale() > GuacUI.Client.max_zoom)
GuacUI.Client.setScale(GuacUI.Client.max_zoom);
};