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Eliminated exceptions in event handlers that happen when "this.view" does not exists (empty tree)

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yup 2024-03-08 14:04:02 +00:00 • committed by roytam1
commit 17182d8b63
1 changed files with 37 additions and 35 deletions
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72
toolkit/content/widgets/tree.xml
View file

@ -737,6 +737,7 @@
</handler>
<handler event="MozSwipeGesture" preventdefault="true">
<![CDATA[
if (!this.view) return;
// Figure out which row to show
let targetRow = 0;
@ -756,6 +757,7 @@
<handler event="focus">
<![CDATA[
this.treeBoxObject.focused = true;
if (!this.view) return;
if (this.currentIndex == -1 && this.view.rowCount > 0) {
this.currentIndex = this.treeBoxObject.getFirstVisibleRow();
}
@ -778,7 +780,7 @@
<!-- Use F2 key to enter text editing. -->
<handler event="keydown" keycode="VK_F2">
<![CDATA[
if (!this._cellSelType)
if (!this.view || !this._cellSelType)
return;
var row = this.currentIndex;
var column = this.view.selection.currentColumn;
@ -900,112 +902,112 @@
</handler>
<handler event="keydown" keycode="VK_UP" modifiers="accel any">
<![CDATA[
if (this._editingColumn)
if (!this.view || this._editingColumn)
return;
_moveByOffset(-1, 0, event);
]]>
</handler>
<handler event="keydown" keycode="VK_DOWN" modifiers="accel any">
<![CDATA[
if (this._editingColumn)
if (!this.view || this._editingColumn)
return;
_moveByOffset(1, this.view.rowCount - 1, event);
]]>
</handler>
<handler event="keydown" keycode="VK_UP" modifiers="accel any, shift">
<![CDATA[
if (this._editingColumn)
if (!this.view || this._editingColumn)
return;
_moveByOffsetShift(-1, 0, event);
]]>
</handler>
<handler event="keydown" keycode="VK_DOWN" modifiers="accel any, shift">
<![CDATA[
if (this._editingColumn)
if (!this.view || this._editingColumn)
return;
_moveByOffsetShift(1, this.view.rowCount - 1, event);
]]>
</handler>
<handler event="keydown" keycode="VK_PAGE_UP" modifiers="accel any">
<![CDATA[
if (this._editingColumn)
if (!this.view || this._editingColumn)
return;
_moveByPage(-1, 0, event);
]]>
</handler>
<handler event="keydown" keycode="VK_PAGE_DOWN" modifiers="accel any">
<![CDATA[
if (this._editingColumn)
if (!this.view || this._editingColumn)
return;
_moveByPage(1, this.view.rowCount - 1, event);
]]>
</handler>
<handler event="keydown" keycode="VK_PAGE_UP" modifiers="accel any, shift">
<![CDATA[
if (this._editingColumn)
if (!this.view || this._editingColumn)
return;
_moveByPageShift(-1, 0, event);
]]>
</handler>
<handler event="keydown" keycode="VK_PAGE_DOWN" modifiers="accel any, shift">
<![CDATA[
if (this._editingColumn)
if (!this.view || this._editingColumn)
return;
_moveByPageShift(1, this.view.rowCount - 1, event);
]]>
</handler>
<handler event="keydown" keycode="VK_HOME" modifiers="accel any">
<![CDATA[
if (this._editingColumn)
if (!this.view || this._editingColumn)
return;
_moveToEdge(0, event);
]]>
</handler>
<handler event="keydown" keycode="VK_END" modifiers="accel any">
<![CDATA[
if (this._editingColumn)
if (!this.view || this._editingColumn)
return;
_moveToEdge(this.view.rowCount - 1, event);
]]>
</handler>
<handler event="keydown" keycode="VK_HOME" modifiers="accel any, shift">
<![CDATA[
if (this._editingColumn)
if (!this.view || this._editingColumn)
return;
_moveToEdgeShift(0, event);
]]>
</handler>
<handler event="keydown" keycode="VK_END" modifiers="accel any, shift">
<![CDATA[
if (this._editingColumn)
if (!this.view || this._editingColumn)
return;
_moveToEdgeShift(this.view.rowCount - 1, event);
]]>
</handler>
<handler event="keypress">
<![CDATA[
if (this._editingColumn)
return;
if (!this.view || this._editingColumn)
return;
if (event.charCode == ' '.charCodeAt(0)) {
var c = this.currentIndex;
if (!this.view.selection.isSelected(c) ||
(!this.view.selection.single && this._isAccelPressed(event))) {
this.view.selection.toggleSelect(c);
event.preventDefault();
}
}
else if (!this.disableKeyNavigation && event.charCode > 0 &&
!event.altKey && !this._isAccelPressed(event) &&
!event.metaKey && !event.ctrlKey) {
var l = this._keyNavigate(event);
if (l >= 0) {
this.view.selection.timedSelect(l, this._selectDelay);
this.treeBoxObject.ensureRowIsVisible(l);
}
event.preventDefault();
}
]]>
if (event.charCode == ' '.charCodeAt(0)) {
var c = this.currentIndex;
if (!this.view.selection.isSelected(c) ||
(!this.view.selection.single && this._isAccelPressed(event))) {
this.view.selection.toggleSelect(c);
event.preventDefault();
}
}
else if (!this.disableKeyNavigation && event.charCode > 0 &&
!event.altKey && !this._isAccelPressed(event) &&
!event.metaKey && !event.ctrlKey) {
var l = this._keyNavigate(event);
if (l >= 0) {
this.view.selection.timedSelect(l, this._selectDelay);
this.treeBoxObject.ensureRowIsVisible(l);
}
event.preventDefault();
}
]]>
</handler>
</handlers>
</binding>
@ -1558,4 +1560,4 @@
</handler>
</handlers>
</binding>
</bindings>
</bindings>