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broadway: Don't swap node trees until all images are loaded

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This commit is contained in:
Alexander Larsson 2017-11-21 20:28:56 +01:00
parent fd0285de09
commit 97c0d112af
1 changed files with 33 additions and 13 deletions
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46
gdk/broadway/broadway.js
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@ -291,7 +291,34 @@ function cmdLowerSurface(id)
restackWindows();
}
function handleNode(parent, node_data, data_pos)
function SwapNodes(div) {
this.div = div;
this.div2 = document.createElement('div');;
this.outstanding = 1;
}
SwapNodes.prototype.did_one = function(image) {
this.outstanding--;
if (this.outstanding == 0) {
var oldDiv2 = null;
if (this.div.hasChildNodes())
oldDiv2 = this.div.lastChild;
this.div.appendChild(this.div2);
if (oldDiv2)
this.div.removeChild(oldDiv2);
}
}
SwapNodes.prototype.add_image = function(image) {
this.outstanding++;
var v = this;
image.addEventListener('load', function() {
v.did_one ();
}, false);
};
SwapNodes.prototype.handle_node = function(parent, node_data, data_pos)
{
var type = node_data[data_pos++];
switch (type)
@ -309,6 +336,7 @@ function handleNode(parent, node_data, data_pos)
image.style["left"] = x + "px";
image.style["top"] = y + "px";
var texture_url = textures[texture_id];
this.add_image(image);
image.src = texture_url;
parent.appendChild(image);
break;
@ -316,7 +344,7 @@ function handleNode(parent, node_data, data_pos)
case 1: // CONTAINER
var len = node_data[data_pos++];
for (var i = 0; i < len; i++) {
data_pos = handleNode(parent, node_data, data_pos);
data_pos = this.handle_node(parent, node_data, data_pos);
}
break;
default:
@ -333,20 +361,12 @@ function cmdWindowSetNodes(id, node_data)
var div = surface.div;
/* We use a secondary div so that we can remove all previous children in one go */
var oldDiv2 = null;
if (div.hasChildNodes())
oldDiv2 = div.lastChild;
var div2 = document.createElement('div');
var end = handleNode(div2, node_data, 0);
var swap = new SwapNodes (div);
var end = swap.handle_node(swap.div2, node_data, 0);
if (end != node_data.length)
alert ("Did not consume entire array (len " + node_data.length + " end " + end + ")");
div.appendChild(div2);
if (oldDiv2)
div.removeChild(oldDiv2);
swap.did_one ();
}
function cmdUploadTexture(id, data)