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Copy and paste and basic selection support

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This commit is contained in:
Fabian Jakobs 2010-04-06 11:07:33 +02:00
commit f85c1b9758
6 changed files with 358 additions and 22 deletions
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108
VirtualRenderer.js
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@ -8,6 +8,21 @@ function VirtualRenderer(containerId)
row: 0,
column: 0
};
this.layers = [];
this.layers.push({
element: this.canvas,
update: this.updateLines
});
this.markerEl = document.createElement("div");
this.markerEl.className = "markers";
this.container.appendChild(this.markerEl);
this.layers.push({
element: this.markerEl,
update: this.updateMarkers
});
}
inherits(VirtualRenderer, DumbRenderer);
@ -19,15 +34,27 @@ VirtualRenderer.prototype.draw = function()
var minHeight = this.container.clientHeight + offset;
var longestLine = this.getLongestLineWidth(lines);
this.canvas.style.marginTop = (-offset) + "px";
this.canvas.style.height = minHeight + "px";
this.canvas.style.width = longestLine + "px";
var lineCount = Math.ceil(minHeight / this.lineHeight);
this.firstRow = firstRow = Math.round((this.scrollTop - offset) / this.lineHeight);
var lastRow = Math.min(lines.length, firstRow+lineCount);
for (var i=0; i < this.layers.length; i++)
{
var layer = this.layers[i];
var style = layer.element.style;
style.marginTop = (-offset) + "px";
style.height = minHeight + "px";
style.width = longestLine + "px";
layer.update.call(this, layer.element, firstRow, lastRow, longestLine);
};
this.updateCursor(this.cursorPos);
}
VirtualRenderer.prototype.updateLines = function(element, firstRow, lastRow, width)
{
var html = [];
for (var i=firstRow; i<lastRow; i++)
{
@ -35,16 +62,14 @@ VirtualRenderer.prototype.draw = function()
"<div class='line ",
i % 2 == 0 ? "even" : "odd",
"' style='height:" + this.lineHeight + "px;",
"width:", longestLine, "px'>"
"width:", width, "px'>"
);
this.renderLine(html, i),
html.push("</div>");
}
this.canvas.innerHTML = html.join("");
this.updateCursor(this.cursorPos);
}
element.innerHTML = html.join("");
};
VirtualRenderer.prototype.renderLine = function(stringBuilder, row)
{
@ -66,6 +91,67 @@ VirtualRenderer.prototype.renderLine = function(stringBuilder, row)
};
};
VirtualRenderer.prototype.updateMarkers = function(element, firstRow, lastRow, width)
{
var html = [];
for (var key in this.markers)
{
var marker = this.markers[key];
var range = marker.range;
if (range.start.row !== range.end.row)
{
if (range.start.row >= firstRow && range.start.row <= lastRow)
{
html.push(
"<div class='", marker.clazz, "' style='",
"height:", this.lineHeight, "px;",
"width:", width - (range.start.column * this.characterWidth), "px;",
"top:", (range.start.row-firstRow) * this.lineHeight, "px;",
"left:", range.start.column * this.characterWidth, "px;'></div>"
);
}
if (range.end.row >= firstRow && range.end.row <= lastRow)
{
html.push(
"<div class='", marker.clazz, "' style='",
"height:", this.lineHeight, "px;",
"top:", (range.end.row-firstRow) * this.lineHeight, "px;",
"width:", range.end.column * this.characterWidth, "px;'></div>"
);
};
for (var row=range.start.row+1; row < range.end.row; row++)
{
if (row >= firstRow && row <= lastRow)
{
html.push(
"<div class='", marker.clazz, "' style='",
"height:", this.lineHeight, "px;",
"width:", width, "px;",
"top:", (row-firstRow) * this.lineHeight, "px;'></div>"
);
}
};
}
else
{
if (range.start.row >= firstRow && range.start.row <= lastRow)
{
html.push(
"<div class='", marker.clazz, "' style='",
"height:", this.lineHeight, "px;",
"width:", (range.end.column - range.start.column) * this.characterWidth, "px;",
"top:", (range.start.row-firstRow) * this.lineHeight, "px;",
"left:", range.start.column * this.characterWidth, "px;'></div>"
);
}
}
}
element.innerHTML = html.join("");
};
VirtualRenderer.prototype.updateCursor = function(position)
{
this.cursorPos = {