Handle out-of-screen conditions. Improve drawing code.

Source/CandidateUI/VTCandidateController.h

@@ -52,6 +52,8 @@
 - (BOOL)highlightNextCandidate;
 - (BOOL)highlightPreviousCandidate;
 
+- (void)setWindowTopLeftPoint:(NSPoint)topLeftPoint bottomOutOfScreenAdjustmentHeight:(CGFloat)height;
+
 - (NSUInteger)candidateIndexAtKeyLabelIndex:(NSUInteger)index;
 
 @property (assign, weak, nonatomic) id<VTCandidateControllerDelegate> delegate;

Source/CandidateUI/VTCandidateController.m

@@ -82,6 +82,52 @@
     return NO;
 }
 
+- (void)setWindowTopLeftPoint:(NSPoint)topLeftPoint bottomOutOfScreenAdjustmentHeight:(CGFloat)height
+{
+    NSPoint adjustedPoint = topLeftPoint;
+    CGFloat adjustedHeight = height;
+    
+    // first, locate the screen the point is in
+    NSRect screenFrame = [[NSScreen mainScreen] visibleFrame];
+    
+    for (NSScreen *screen in [NSScreen screens]) {
+        NSRect frame = [screen visibleFrame];
+        if (topLeftPoint.x >= NSMinX(frame) && topLeftPoint.x <= NSMaxX(frame)) {
+            screenFrame = frame;
+            break;
+        }
+    }
+    
+    // make sure we don't have any erratic value
+    if (adjustedHeight > screenFrame.size.height / 2.0) {
+        adjustedHeight = 0.0;
+    }
+    
+    NSSize windowSize = [[self window] frame].size;
+    
+    // bottom beneath the screen?
+    if (adjustedPoint.y - windowSize.height < NSMinY(screenFrame)) {
+        adjustedPoint.y = topLeftPoint.y + adjustedHeight + windowSize.height;
+    }
+    
+    // top over the screen?
+    if (adjustedPoint.y >= NSMaxY(screenFrame)) {
+        adjustedPoint.y = NSMaxY(screenFrame) - 1.0;
+    }
+    
+    // right
+    if (adjustedPoint.x + windowSize.width >= NSMaxX(screenFrame)) {
+        adjustedPoint.x = NSMaxX(screenFrame) - windowSize.width;
+    }
+    
+    // left
+    if (adjustedPoint.x < NSMinX(screenFrame)) {
+        adjustedPoint.x = NSMinX(screenFrame);
+    }
+    
+    [[self window] setFrameTopLeftPoint:adjustedPoint];
+}
+
 - (NSUInteger)candidateIndexAtKeyLabelIndex:(NSUInteger)index
 {
     return NSUIntegerMax;
@@ -108,9 +154,9 @@
     return NSMakePoint(frameRect.origin.x, frameRect.origin.y + frameRect.size.height);
 }
 
-- (void)setWindowTopLeftPoint:(NSPoint)windowTopLeftPoint
+- (void)setWindowTopLeftPoint:(NSPoint)topLeftPoint
 {
-    [[self window] setFrameTopLeftPoint:windowTopLeftPoint];
+    [self setWindowTopLeftPoint:topLeftPoint bottomOutOfScreenAdjustmentHeight:0.0];
 }
 
 - (NSUInteger)selectedCandidateIndex

Source/CandidateUI/VTHorizontalCandidateController.m

@@ -192,6 +192,13 @@
         NSRect buttonRect = [_nextPageButton frame];
         CGFloat spacing = 0.0;
         
+        if (newSize.height < 40.0) {
+            buttonRect.size.height = floor(newSize.height / 2);
+        }
+        else {
+            buttonRect.size.height = 20.0;
+        }
+        
         if (newSize.height >= 60.0) {
             spacing = ceil(newSize.height * 0.1);
         }

Source/CandidateUI/VTHorizontalCandidateView.m

@@ -27,6 +27,10 @@
 
 #import "VTHorizontalCandidateView.h"
 
+// use these instead of MIN/MAX macro to keep compilers happy with pedantic warnings on
+NS_INLINE CGFloat min(CGFloat a, CGFloat b) { return a < b ? a : b; }
+NS_INLINE CGFloat max(CGFloat a, CGFloat b) { return a > b ? a : b; }
+
 @implementation VTHorizontalCandidateView
 
 @synthesize highlightedIndex = _highlightedIndex;
@@ -46,7 +50,7 @@
 
 - (void)setKeyLabels:(NSArray *)labels displayedCandidates:(NSArray *)candidates
 {
-    NSUInteger count = MIN([labels count], [candidates count]);
+    NSUInteger count = min([labels count], [candidates count]);
     id tmp;
     
     tmp = _keyLabels;
@@ -66,7 +70,7 @@
         // TODO: Handle CJK text drawing
         NSRect candidateRect = [[_displayedCandidates objectAtIndex:index] boundingRectWithSize:baseSize options:NSStringDrawingUsesLineFragmentOrigin attributes:_candidateAttrDict];
         
-        CGFloat width = MAX(labelRect.size.width, candidateRect.size.width) + _cellPadding;
+        CGFloat width = max(labelRect.size.width, candidateRect.size.width) + _cellPadding;
         [newWidths addObject:[NSNumber numberWithDouble:width]];
     }
     
@@ -107,50 +111,12 @@
 
 
     CGFloat labelFontSize = [labelFont pointSize];
-    CGFloat candidateFontSize = MAX([candidateFont pointSize], [candidateFontCJK pointSize]);
-    CGFloat biggestSize = MAX(labelFontSize, candidateFontSize);
+    CGFloat candidateFontSize = max([candidateFont pointSize], [candidateFontCJK pointSize]);
+    CGFloat biggestSize = max(labelFontSize, candidateFontSize);
     
-    _keyLabelHeight = labelFontSize;
-    _candidateTextHeight = candidateFontSize;
-    
-    if (labelFontSize <= 16.0) {
-        _keyLabelHeight += 4.0;
-    }
-    else if (labelFontSize <= 24.0) {
-        _keyLabelHeight += 8.0;
-    }
-    else if (labelFontSize <= 64.0) {
-        _keyLabelHeight += 16.0;
-    }
-    else {
-        _keyLabelHeight += 24.0;
-    }
-
-    if (candidateFontSize <= 16.0) {
-        _candidateTextHeight += 4.0;
-    }
-    else if (candidateFontSize <= 24.0) {
-        _candidateTextHeight += 8.0;
-    }
-    else if (candidateFontSize <= 64.0) {
-        _candidateTextHeight += 16.0;
-    }
-    else {
-        _candidateTextHeight += 24.0;
-    }
-
-    if (biggestSize <= 16.0) {
-        _cellPadding = 8.0;
-    }
-    else if (biggestSize <= 24.0) {
-        _cellPadding = 16.0;
-    }
-    else if (biggestSize <= 64.0) {
-        _cellPadding = 24.0;
-    }
-    else {
-        _cellPadding = 32.0;
-    }
+    _keyLabelHeight = ceil(labelFontSize * 1.20);
+    _candidateTextHeight = ceil(candidateFontSize * 1.20);
+    _cellPadding = ceil(biggestSize / 2.0);
 }
 
 

Source/CandidateUI/VTVerticalCandidateController.m

@@ -29,6 +29,10 @@
 #import "VTVerticalKeyLabelStripView.h"
 #import "VTVerticalCandidateTableView.h"
 
+// use these instead of MIN/MAX macro to keep compilers happy with pedantic warnings on
+NS_INLINE CGFloat min(CGFloat a, CGFloat b) { return a < b ? a : b; }
+NS_INLINE CGFloat max(CGFloat a, CGFloat b) { return a > b ? a : b; }
+
 static const CGFloat kCandidateTextPadding = 24.0;
 static const CGFloat kCandidateTextLeftMargin = 8.0;
 
@@ -108,7 +112,7 @@ static const CGFloat kCandidateTextLeftMargin = 8.0;
 
 - (void)reloadData
 {
-    _maxCandidateAttrStringWidth = ceil(MAX([_candidateFont pointSize], [_CJKCandidateFont pointSize])) * 2.0 + kCandidateTextPadding;
+    _maxCandidateAttrStringWidth = ceil(max([_candidateFont pointSize], [_CJKCandidateFont pointSize])) * 2.0 + kCandidateTextPadding;
 
     [_tableView reloadData];
     [self layoutCandidateView];
@@ -168,7 +172,7 @@ static const CGFloat kCandidateTextLeftMargin = 8.0;
     
     if (selectedRow != -1 && itemCount > 0 && itemCount > labelCount) {
         if (newIndex > selectedRow && (newIndex - selectedRow) > 1) {
-            lastVisibleRow = MIN(newIndex + labelCount - 1, itemCount - 1);            
+            lastVisibleRow = min(newIndex + labelCount - 1, itemCount - 1);            
         }
         
         // no need to handle the backward case: (newIndex < selectedRow && selectedRow - newIndex > 1)
@@ -274,7 +278,7 @@ static const CGFloat kCandidateTextLeftMargin = 8.0;
             return NO;
         }
         
-        newIndex = MIN(newIndex + labelCount, itemCount - 1);
+        newIndex = min(newIndex + labelCount, itemCount - 1);
     }
     else {
         if (newIndex == 0) {
@@ -329,9 +333,9 @@ static const CGFloat kCandidateTextLeftMargin = 8.0;
         return;
     }
     
-    CGFloat candidateFontSize = ceil(MAX([_candidateFont pointSize], [_CJKCandidateFont pointSize]));
+    CGFloat candidateFontSize = ceil(max([_candidateFont pointSize], [_CJKCandidateFont pointSize]));
     CGFloat keyLabelFontSize = ceil([_keyLabelFont pointSize]);
-    CGFloat fontSize = MAX(candidateFontSize, keyLabelFontSize);
+    CGFloat fontSize = max(candidateFontSize, keyLabelFontSize);
     
     NSControlSize controlSize = (fontSize > 36.0) ? NSRegularControlSize : NSSmallControlSize;
     
@@ -362,24 +366,9 @@ static const CGFloat kCandidateTextLeftMargin = 8.0;
     _keyLabelStripView.keyLabels = [_keyLabels subarrayWithRange:NSMakeRange(0, keyLabelCount)];
     _keyLabelStripView.labelOffsetY = (keyLabelFontSize >= candidateFontSize) ? 0.0 : floor((candidateFontSize - keyLabelFontSize) / 2.0);
     
-    CGFloat rowHeight = fontSize;
-    
-    if (fontSize <= 16.0) {
-        rowHeight += 4.0;
-    }
-    else if (fontSize <= 24.0) {
-        rowHeight += 8.0;
-    }
-    else if (fontSize <= 64.0) {
-        rowHeight += 16.0;
-    }
-    else {
-        rowHeight += 24.0;
-    }
-    
+    CGFloat rowHeight = ceil(fontSize * 1.20);
     [_tableView setRowHeight:rowHeight];
     
-    
     CGFloat rowSpacing = [_tableView intercellSpacing].height;    
     CGFloat stripWidth = ceil(keyLabelFontSize * 1.20);
     CGFloat tableViewStartWidth = ceil(_maxCandidateAttrStringWidth + scrollerWidth);;
@@ -387,7 +376,6 @@ static const CGFloat kCandidateTextLeftMargin = 8.0;
     CGFloat windowHeight = keyLabelCount * (rowHeight + rowSpacing);
     
     NSRect frameRect = [[self window] frame];
-    frameRect = [[self window] frame];
     NSPoint topLeftPoint = NSMakePoint(frameRect.origin.x, frameRect.origin.y + frameRect.size.height);
     
     frameRect.size = NSMakeSize(windowWidth, windowHeight);