src/renderer/mac/CandidateView.mm - mozc - Git at Google

 // Copyright 2010-2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 // copyright notice, this list of conditions and the following disclaimer
 // in the documentation and/or other materials provided with the
 // distribution.
 //     * Neither the name of Google Inc. nor the names of its
 // contributors may be used to endorse or promote products derived from
 // this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 #include <set>

 #import "renderer/mac/CandidateView.h"

 #include "base/logging.h"
 #include "base/mutex.h"
 #include "client/client_interface.h"
 #include "renderer/mac/mac_view_util.h"
 #include "renderer/table_layout.h"
 #include "session/commands.pb.h"
 #include "renderer/renderer_style.pb.h"
 #include "renderer/renderer_style_handler.h"


 using mozc::client::SendCommandInterface;
 using mozc::commands::Candidates;
 using mozc::commands::Output;
 using mozc::commands::SessionCommand;
 using mozc::renderer::TableLayout;
 using mozc::renderer::RendererStyle;
 using mozc::renderer::RendererStyleHandler;
 using mozc::renderer::mac::MacViewUtil;
 using mozc::once_t;
 using mozc::CallOnce;

 // Those constants and most rendering logic is as same as Windows
 // native candidate window.
 // TODO(mukai): integrate and share the code among Win and Mac.

 namespace {
 const NSImage *g_LogoImage = NULL;
 int g_column_minimum_width = 0;
 once_t g_OnceForInitializeStyle = MOZC_ONCE_INIT;

 void InitializeDefaultStyle() {
   NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

   RendererStyle style;
   RendererStyleHandler::GetRendererStyle(&style);

   string logo_file_name = style.logo_file_name();
   g_LogoImage =
     [NSImage imageNamed:[NSString stringWithUTF8String:logo_file_name.c_str()]];
   if (g_LogoImage) {
     // setFlipped is deprecated at Snow Leopard, but we use this because
     // it works well with Snow Leopard and new method to deal with
     // flipped view doesn't work with Leopard.
     [g_LogoImage setFlipped:YES];

     // Fix the image size.  Sometimes the size can be smaller than the
     // actual size because of blank margin.
     NSArray *logoReps = [g_LogoImage representations];
     if (logoReps && [logoReps count] > 0) {
       NSImageRep *representation = [logoReps objectAtIndex:0];
       [g_LogoImage setSize:NSMakeSize([representation pixelsWide],
                                       [representation pixelsHigh])];
     }
   }

   NSString *nsstr =
     [NSString stringWithUTF8String:style.column_minimum_width_string().c_str()];
   NSDictionary *attr =
     [NSDictionary dictionaryWithObject:[NSFont messageFontOfSize:14]
                                 forKey:NSFontAttributeName];
   NSAttributedString *defaultMessage =
     [[[NSAttributedString alloc] initWithString:nsstr attributes:attr]
      autorelease];
   g_column_minimum_width = [defaultMessage size].width;

   // default line width is specified as 1.0 *pt*, but we want to draw
   // it as 1.0 px.
   [NSBezierPath setDefaultLineWidth:1.0];
   [NSBezierPath setDefaultLineJoinStyle:NSMiterLineJoinStyle];
   [pool drain];
 }
 }

 // Private method declarations.
 @interface CandidateView ()
 // Draw the |row|-th row.
 - (void)drawRow:(int)row;

 // Draw footer
 - (void)drawFooter;

 // Draw scroll bar
 - (void)drawVScrollBar;
 @end

 @implementation CandidateView
 #pragma mark initialization

 - (id)initWithFrame:(NSRect)frame {
   CallOnce(&g_OnceForInitializeStyle, InitializeDefaultStyle);
   self = [super initWithFrame:frame];
   if (self) {
     tableLayout_ = new(nothrow)TableLayout;
     RendererStyle *style = new(nothrow)RendererStyle;
     if (style) {
       RendererStyleHandler::GetRendererStyle(style);
     }
     style_ = style;
     focusedRow_ = -1;
   }
   if (!tableLayout_ || !style_) {
     [self release];
     self = nil;
   }
   return self;
 }

 - (void)setCandidates:(const Candidates *)candidates {
   candidates_.CopyFrom(*candidates);
 }

 - (void)setSendCommandInterface:(SendCommandInterface *)command_sender {
   command_sender_ = command_sender;
 }

 - (BOOL)isFlipped {
   return YES;
 }

 - (void)dealloc {
   [candidateStringsCache_ release];
   delete tableLayout_;
   delete style_;
   [super dealloc];
 }

 - (const TableLayout *)tableLayout {
   return tableLayout_;
 }

 #pragma mark drawing

 #define max(x, y)  (((x) > (y))? (x) : (y))
 - (NSSize)updateLayout {
   NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
   [candidateStringsCache_ release];
   tableLayout_->Initialize(candidates_.candidate_size(), NUMBER_OF_COLUMNS);
   tableLayout_->SetWindowBorder(style_->window_border());

   // calculating focusedRow_
   if (candidates_.has_focused_index() && candidates_.candidate_size() > 0) {
     const int focusedIndex = candidates_.focused_index();
     focusedRow_ = focusedIndex - candidates_.candidate(0).index();
   } else {
     focusedRow_ = -1;
   }

   // Reserve footer space.
   if (candidates_.has_footer()) {
     NSSize footerSize = NSZeroSize;

     const mozc::commands::Footer &footer = candidates_.footer();

     if (footer.has_label()) {
       NSAttributedString *footerLabel = MacViewUtil::ToNSAttributedString(
           footer.label(), style_->footer_style());
       NSSize footerLabelSize =
           MacViewUtil::applyTheme([footerLabel size], style_->footer_style());
       footerSize.width += footerLabelSize.width;
       footerSize.height = max(footerSize.height, footerLabelSize.height);
     }

     if (footer.has_sub_label()) {
       NSAttributedString *footerSubLabel = MacViewUtil::ToNSAttributedString(
           footer.sub_label(), style_->footer_sub_label_style());
       NSSize footerSubLabelSize =
           MacViewUtil::applyTheme([footerSubLabel size], style_->footer_sub_label_style());
       footerSize.width += footerSubLabelSize.width;
       footerSize.height = max(footerSize.height, footerSubLabelSize.height);
     }

     if (footer.logo_visible() && g_LogoImage) {
       NSSize logoSize = [g_LogoImage size];
       footerSize.width += logoSize.width;
       footerSize.height = max(footerSize.height, logoSize.height);
     }

     if (footer.index_visible()) {
       const int focusedIndex = candidates_.focused_index();
       const int totalItems = candidates_.size();
       NSString *footerIndex =
           [NSString stringWithFormat:@"%d/%d", focusedIndex + 1, totalItems];
       NSAttributedString *footerAttributedIndex =
           MacViewUtil::ToNSAttributedString([footerIndex UTF8String],
                                             style_->footer_style());
       NSSize footerIndexSize =
           MacViewUtil::applyTheme([footerAttributedIndex size],
                                   style_->footer_style());
       footerSize.width += footerIndexSize.width;
       footerSize.height = max(footerSize.height, footerIndexSize.height);
     }

     footerSize.height += style_->footer_border_colors_size();
     tableLayout_->EnsureFooterSize(MacViewUtil::ToSize(footerSize));
   }

   tableLayout_->SetRowRectPadding(style_->row_rect_padding());
   if (candidates_.candidate_size() < candidates_.size()) {
     tableLayout_->SetVScrollBar(style_->scrollbar_width());
   }

   NSAttributedString *gap1 = MacViewUtil::ToNSAttributedString(
       " ", style_->text_styles(COLUMN_GAP1));
   tableLayout_->EnsureCellSize(COLUMN_GAP1, MacViewUtil::ToSize([gap1 size]));

   NSMutableArray *newCache = [[NSMutableArray array] retain];
   for (size_t i = 0; i < candidates_.candidate_size(); ++i) {
     const Candidates::Candidate &candidate = candidates_.candidate(i);
     NSAttributedString *shortcut = MacViewUtil::ToNSAttributedString(
        candidate.annotation().shortcut(),
        style_->text_styles(COLUMN_SHORTCUT));
     string value = candidate.value();
     if (candidate.annotation().has_prefix()) {
       value = candidate.annotation().prefix() + value;
     }
     if (candidate.annotation().has_suffix()) {
       value.append(candidate.annotation().suffix());
     }
     if (!value.empty()) {
       value.append("  ");
     }

     NSAttributedString *candidateValue = MacViewUtil::ToNSAttributedString(
         value, style_->text_styles(COLUMN_CANDIDATE));
     NSAttributedString *description = MacViewUtil::ToNSAttributedString(
        candidate.annotation().description(),
        style_->text_styles(COLUMN_DESCRIPTION));
     if ([shortcut length] > 0) {
       NSSize shortcutSize = MacViewUtil::applyTheme(
           [shortcut size], style_->text_styles(COLUMN_SHORTCUT));
       tableLayout_->EnsureCellSize(COLUMN_SHORTCUT,
                                    MacViewUtil::ToSize(shortcutSize));
     }
     if ([candidateValue length] > 0) {
       NSSize valueSize = MacViewUtil::applyTheme(
           [candidateValue size], style_->text_styles(COLUMN_CANDIDATE));
       tableLayout_->EnsureCellSize(COLUMN_CANDIDATE,
                                    MacViewUtil::ToSize(valueSize));
     }
     if ([description length] > 0) {
       NSSize descriptionSize = MacViewUtil::applyTheme(
           [description size], style_->text_styles(COLUMN_DESCRIPTION));
       tableLayout_->EnsureCellSize(COLUMN_DESCRIPTION,
                                    MacViewUtil::ToSize(descriptionSize));
     }

     [newCache addObject:[NSArray arrayWithObjects:shortcut, gap1,
                                  candidateValue, description, nil]];
   }

   tableLayout_->EnsureColumnsWidth(COLUMN_CANDIDATE, COLUMN_DESCRIPTION,
                                    g_column_minimum_width);

   candidateStringsCache_ = newCache;
   tableLayout_->FreezeLayout();
   [pool drain];
   return MacViewUtil::ToNSSize(tableLayout_->GetTotalSize());
 }

 - (void)drawRect:(NSRect)rect {
   if (!Category_IsValid(candidates_.category())) {
     LOG(WARNING) << "Unknown candidates category: " << candidates_.category();
     return;
   }

   for (int i = 0; i < candidates_.candidate_size(); ++i) {
     [self drawRow:i];
   }

   if (candidates_.candidate_size() < candidates_.size()) {
     [self drawVScrollBar];
   }
   [self drawFooter];

   // Draw the window border at last
   [MacViewUtil::ToNSColor(style_->border_color()) set];
   mozc::Size windowSize = tableLayout_->GetTotalSize();
   [NSBezierPath strokeRect:NSMakeRect(
       0.5, 0.5, windowSize.width - 1, windowSize.height - 1)];
 }

 #pragma mark drawing aux methods

 - (void)drawRow:(int)row {
   if (row == focusedRow_) {
     // Draw focused background
     NSRect focusedRect = MacViewUtil::ToNSRect(tableLayout_->GetRowRect(focusedRow_));
     [MacViewUtil::ToNSColor(style_->focused_background_color()) set];
     [NSBezierPath fillRect:focusedRect];
     [MacViewUtil::ToNSColor(style_->focused_border_color()) set];
     // Fix the border position.  Because a line should be drawn at the
     // middle point of the pixel, origin should be shifted by 0.5 unit
     // and the size should be shrinked by 1.0 unit.
     focusedRect.origin.x += 0.5;
     focusedRect.origin.y += 0.5;
     focusedRect.size.width -= 1.0;
     focusedRect.size.height -= 1.0;
     [NSBezierPath strokeRect:focusedRect];
   } else {
     // Draw normal background
     for (int i = COLUMN_SHORTCUT; i < NUMBER_OF_COLUMNS; ++i) {
       mozc::Rect cellRect = tableLayout_->GetCellRect(row, i);
       if (cellRect.size.width > 0 && cellRect.size.height > 0 &&
           style_->text_styles(i).has_background_color()) {
         [MacViewUtil::ToNSColor(style_->text_styles(i).background_color()) set];
         [NSBezierPath fillRect:MacViewUtil::ToNSRect(cellRect)];
       }
     }
   }

   NSArray *candidate = [candidateStringsCache_ objectAtIndex:row];
   for (int i = COLUMN_SHORTCUT; i < NUMBER_OF_COLUMNS; ++i) {
     NSAttributedString *text = [candidate objectAtIndex:i];
     NSRect cellRect = MacViewUtil::ToNSRect(tableLayout_->GetCellRect(row, i));
     NSPoint &candidatePosition = cellRect.origin;
     // Adjust the positions
     candidatePosition.x += style_->text_styles(i).left_padding();
     candidatePosition.y += (cellRect.size.height - [text size].height) / 2;
     [text drawAtPoint:candidatePosition];
   }

   if (candidates_.candidate(row).has_information_id()) {
       NSRect rect = MacViewUtil::ToNSRect(tableLayout_->GetRowRect(row));
       [MacViewUtil::ToNSColor(style_->focused_border_color()) set];
       rect.origin.x += rect.size.width - 6.0;
       rect.size.width = 4.0;
       rect.origin.y += 2.0;
       rect.size.height -= 4.0;
       [NSBezierPath fillRect:rect];
   }
 }

 - (void)drawFooter {
   NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
   if (candidates_.has_footer()) {
     const mozc::commands::Footer &footer = candidates_.footer();
     NSRect footerRect = MacViewUtil::ToNSRect(tableLayout_->GetFooterRect());

     // Draw footer border
     for (int i = 0; i < style_->footer_border_colors_size(); ++i) {
       [MacViewUtil::ToNSColor(style_->footer_border_colors(i)) set];
       NSPoint fromPoint = NSMakePoint(footerRect.origin.x,
                                       footerRect.origin.y + 0.5);
       NSPoint toPoint = NSMakePoint(footerRect.origin.x + footerRect.size.width,
                                     footerRect.origin.y + 0.5);
       [NSBezierPath strokeLineFromPoint:fromPoint toPoint:toPoint];
       footerRect.origin.y += 1;
     }

     // Draw Footer background and data if necessary
     NSGradient *footerBackground =
       [[[NSGradient alloc]
         initWithStartingColor:MacViewUtil::ToNSColor(style_->footer_top_color())
         endingColor:MacViewUtil::ToNSColor(style_->footer_bottom_color())]
        autorelease];
     [footerBackground drawInRect:footerRect angle:90.0];

     // Draw logo
     if (footer.logo_visible() && g_LogoImage) {
       [g_LogoImage drawAtPoint:footerRect.origin
                       fromRect:NSZeroRect /* means draw entire image */
                      operation:NSCompositeSourceOver
                       fraction:1.0 /* opacity */];
       NSSize logoSize = [g_LogoImage size];
       footerRect.origin.x += logoSize.width;
       footerRect.size.width -= logoSize.width;
     }

     // Draw label
     if (footer.has_label()) {
       NSAttributedString *footerLabel = MacViewUtil::ToNSAttributedString(
           footer.label(), style_->footer_style());
       footerRect.origin.x += style_->footer_style().left_padding();
       NSSize labelSize = [footerLabel size];
       NSPoint labelPosition = footerRect.origin;
       labelPosition.y += (footerRect.size.height - labelSize.height) / 2;
       [footerLabel drawAtPoint:labelPosition];
     }

     // Draw sub_label
     if (footer.has_sub_label()) {
       NSAttributedString *footerSubLabel = MacViewUtil::ToNSAttributedString(
           footer.sub_label(), style_->footer_sub_label_style());
       footerRect.origin.x += style_->footer_sub_label_style().left_padding();
       NSSize subLabelSize = [footerSubLabel size];
       NSPoint subLabelPosition = footerRect.origin;
       subLabelPosition.y += (footerRect.size.height - subLabelSize.height) / 2;
       [footerSubLabel drawAtPoint:subLabelPosition];
     }

     // Draw footer index (e.g. "10/120")
     if (footer.index_visible()) {
       int focusedIndex = candidates_.focused_index();
       int totalItems = candidates_.size();
       NSString *footerIndex =
           [NSString stringWithFormat:@"%d/%d", focusedIndex + 1, totalItems];
       NSAttributedString *footerAttributedIndex =
         MacViewUtil::ToNSAttributedString(
           [footerIndex UTF8String], style_->footer_style());
       NSSize footerSize = [footerAttributedIndex size];
       NSPoint footerPosition = footerRect.origin;
       footerPosition.x = footerPosition.x + footerRect.size.width -
           footerSize.width - style_->footer_style().right_padding();
       [footerAttributedIndex drawAtPoint:footerPosition];
     }
   }
   [pool drain];
 }

 - (void)drawVScrollBar {
   const mozc::Rect &vscrollRect = tableLayout_->GetVScrollBarRect();

   if (!vscrollRect.IsRectEmpty() && candidates_.candidate_size() > 0) {
     const int beginIndex = candidates_.candidate(0).index();
     const int candidatesTotal = candidates_.size();
     const int endIndex =
         candidates_.candidate(candidates_.candidate_size() - 1).index();

     [MacViewUtil::ToNSColor(style_->scrollbar_background_color()) set];
     [NSBezierPath fillRect:MacViewUtil::ToNSRect(vscrollRect)];

     const mozc::Rect &indicatorRect =
         tableLayout_->GetVScrollIndicatorRect(
             beginIndex, endIndex, candidatesTotal);
     [MacViewUtil::ToNSColor(style_->scrollbar_indicator_color()) set];
     [NSBezierPath fillRect:MacViewUtil::ToNSRect(indicatorRect)];
   }
 }

 #pragma mark event handling callbacks

 const char *Inspect(id obj) {
   return [[NSString stringWithFormat:@"%@", obj] UTF8String];
 }

 - (void)mouseDown:(NSEvent *)event {
   mozc::Point localPos = MacViewUtil::ToPoint(
       [self convertPoint:[event locationInWindow] fromView:nil]);
   int clickedRow = -1;
   for (int i = 0; i < tableLayout_->number_of_rows(); ++i) {
     mozc::Rect rowRect = tableLayout_->GetRowRect(i);
     if (rowRect.PtrInRect(localPos)) {
       clickedRow = i;
       break;
     }
   }

   if (clickedRow >= 0 && clickedRow != focusedRow_) {
     focusedRow_ = clickedRow;
     [self setNeedsDisplay:YES];
   }
 }

 - (void)mouseUp:(NSEvent *)event {
   mozc::Point localPos = MacViewUtil::ToPoint(
       [self convertPoint:[event locationInWindow] fromView:nil]);
   if (command_sender_ == NULL) {
     return;
   }
   if (candidates_.candidate_size() < tableLayout_->number_of_rows()) {
     return;
   }
   for (int i = 0; i < tableLayout_->number_of_rows(); ++i) {
     mozc::Rect rowRect = tableLayout_->GetRowRect(i);
     if (rowRect.PtrInRect(localPos)) {
       SessionCommand command;
       command.set_type(SessionCommand::SELECT_CANDIDATE);
       command.set_id(candidates_.candidate(i).id());
       Output dummy_output;
       command_sender_->SendCommand(command, &dummy_output);
       break;
     }
   }
 }

 - (void)mouseDragged:(NSEvent *)event {
   [self mouseDown:event];
 }
 @end
	// Copyright 2010-2015, Google Inc.
	// All rights reserved.
	//
	// Redistribution and use in source and binary forms, with or without
	// modification, are permitted provided that the following conditions are
	// met:
	//
	// * Redistributions of source code must retain the above copyright
	// notice, this list of conditions and the following disclaimer.
	// * Redistributions in binary form must reproduce the above
	// copyright notice, this list of conditions and the following disclaimer
	// in the documentation and/or other materials provided with the
	// distribution.
	// * Neither the name of Google Inc. nor the names of its
	// contributors may be used to endorse or promote products derived from
	// this software without specific prior written permission.
	//
	// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

	#include <set>

	#import "renderer/mac/CandidateView.h"

	#include "base/logging.h"
	#include "base/mutex.h"
	#include "client/client_interface.h"
	#include "renderer/mac/mac_view_util.h"
	#include "renderer/table_layout.h"
	#include "session/commands.pb.h"
	#include "renderer/renderer_style.pb.h"
	#include "renderer/renderer_style_handler.h"


	using mozc::client::SendCommandInterface;
	using mozc::commands::Candidates;
	using mozc::commands::Output;
	using mozc::commands::SessionCommand;
	using mozc::renderer::TableLayout;
	using mozc::renderer::RendererStyle;
	using mozc::renderer::RendererStyleHandler;
	using mozc::renderer::mac::MacViewUtil;
	using mozc::once_t;
	using mozc::CallOnce;

	// Those constants and most rendering logic is as same as Windows
	// native candidate window.
	// TODO(mukai): integrate and share the code among Win and Mac.

	namespace {
	const NSImage *g_LogoImage = NULL;
	int g_column_minimum_width = 0;
	once_t g_OnceForInitializeStyle = MOZC_ONCE_INIT;

	void InitializeDefaultStyle() {
	NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

	RendererStyle style;
	RendererStyleHandler::GetRendererStyle(&style);

	string logo_file_name = style.logo_file_name();
	g_LogoImage =
	[NSImage imageNamed:[NSString stringWithUTF8String:logo_file_name.c_str()]];
	if (g_LogoImage) {
	// setFlipped is deprecated at Snow Leopard, but we use this because
	// it works well with Snow Leopard and new method to deal with
	// flipped view doesn't work with Leopard.
	[g_LogoImage setFlipped:YES];

	// Fix the image size. Sometimes the size can be smaller than the
	// actual size because of blank margin.
	NSArray *logoReps = [g_LogoImage representations];
	if (logoReps && [logoReps count] > 0) {
	NSImageRep *representation = [logoReps objectAtIndex:0];
	[g_LogoImage setSize:NSMakeSize([representation pixelsWide],
	[representation pixelsHigh])];
	}
	}

	NSString *nsstr =
	[NSString stringWithUTF8String:style.column_minimum_width_string().c_str()];
	NSDictionary *attr =
	[NSDictionary dictionaryWithObject:[NSFont messageFontOfSize:14]
	forKey:NSFontAttributeName];
	NSAttributedString *defaultMessage =
	[[[NSAttributedString alloc] initWithString:nsstr attributes:attr]
	autorelease];
	g_column_minimum_width = [defaultMessage size].width;

	// default line width is specified as 1.0 pt, but we want to draw
	// it as 1.0 px.
	[NSBezierPath setDefaultLineWidth:1.0];
	[NSBezierPath setDefaultLineJoinStyle:NSMiterLineJoinStyle];
	[pool drain];
	}
	}

	// Private method declarations.
	@interface CandidateView ()
	// Draw the \|row\|-th row.
	- (void)drawRow:(int)row;

	// Draw footer
	- (void)drawFooter;

	// Draw scroll bar
	- (void)drawVScrollBar;
	@end

	@implementation CandidateView
	#pragma mark initialization

	- (id)initWithFrame:(NSRect)frame {
	CallOnce(&g_OnceForInitializeStyle, InitializeDefaultStyle);
	self = [super initWithFrame:frame];
	if (self) {
	tableLayout_ = new(nothrow)TableLayout;
	RendererStyle *style = new(nothrow)RendererStyle;
	if (style) {
	RendererStyleHandler::GetRendererStyle(style);
	}
	style_ = style;
	focusedRow_ = -1;
	}
	if (!tableLayout_ \|\| !style_) {
	[self release];
	self = nil;
	}
	return self;
	}

	- (void)setCandidates:(const Candidates *)candidates {
	candidates_.CopyFrom(*candidates);
	}

	- (void)setSendCommandInterface:(SendCommandInterface *)command_sender {
	command_sender_ = command_sender;
	}

	- (BOOL)isFlipped {
	return YES;
	}

	- (void)dealloc {
	[candidateStringsCache_ release];
	delete tableLayout_;
	delete style_;
	[super dealloc];
	}

	- (const TableLayout *)tableLayout {
	return tableLayout_;
	}

	#pragma mark drawing

	#define max(x, y) (((x) > (y))? (x) : (y))
	- (NSSize)updateLayout {
	NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
	[candidateStringsCache_ release];
	tableLayout_->Initialize(candidates_.candidate_size(), NUMBER_OF_COLUMNS);
	tableLayout_->SetWindowBorder(style_->window_border());

	// calculating focusedRow_
	if (candidates_.has_focused_index() && candidates_.candidate_size() > 0) {
	const int focusedIndex = candidates_.focused_index();
	focusedRow_ = focusedIndex - candidates_.candidate(0).index();
	} else {
	focusedRow_ = -1;
	}

	// Reserve footer space.
	if (candidates_.has_footer()) {
	NSSize footerSize = NSZeroSize;

	const mozc::commands::Footer &footer = candidates_.footer();

	if (footer.has_label()) {
	NSAttributedString *footerLabel = MacViewUtil::ToNSAttributedString(
	footer.label(), style_->footer_style());
	NSSize footerLabelSize =
	MacViewUtil::applyTheme([footerLabel size], style_->footer_style());
	footerSize.width += footerLabelSize.width;
	footerSize.height = max(footerSize.height, footerLabelSize.height);
	}

	if (footer.has_sub_label()) {
	NSAttributedString *footerSubLabel = MacViewUtil::ToNSAttributedString(
	footer.sub_label(), style_->footer_sub_label_style());
	NSSize footerSubLabelSize =
	MacViewUtil::applyTheme([footerSubLabel size], style_->footer_sub_label_style());
	footerSize.width += footerSubLabelSize.width;
	footerSize.height = max(footerSize.height, footerSubLabelSize.height);
	}

	if (footer.logo_visible() && g_LogoImage) {
	NSSize logoSize = [g_LogoImage size];
	footerSize.width += logoSize.width;
	footerSize.height = max(footerSize.height, logoSize.height);
	}

	if (footer.index_visible()) {
	const int focusedIndex = candidates_.focused_index();
	const int totalItems = candidates_.size();
	NSString *footerIndex =
	[NSString stringWithFormat:@"%d/%d", focusedIndex + 1, totalItems];
	NSAttributedString *footerAttributedIndex =
	MacViewUtil::ToNSAttributedString([footerIndex UTF8String],
	style_->footer_style());
	NSSize footerIndexSize =
	MacViewUtil::applyTheme([footerAttributedIndex size],
	style_->footer_style());
	footerSize.width += footerIndexSize.width;
	footerSize.height = max(footerSize.height, footerIndexSize.height);
	}

	footerSize.height += style_->footer_border_colors_size();
	tableLayout_->EnsureFooterSize(MacViewUtil::ToSize(footerSize));
	}

	tableLayout_->SetRowRectPadding(style_->row_rect_padding());
	if (candidates_.candidate_size() < candidates_.size()) {
	tableLayout_->SetVScrollBar(style_->scrollbar_width());
	}

	NSAttributedString *gap1 = MacViewUtil::ToNSAttributedString(
	" ", style_->text_styles(COLUMN_GAP1));
	tableLayout_->EnsureCellSize(COLUMN_GAP1, MacViewUtil::ToSize([gap1 size]));

	NSMutableArray *newCache = [[NSMutableArray array] retain];
	for (size_t i = 0; i < candidates_.candidate_size(); ++i) {
	const Candidates::Candidate &candidate = candidates_.candidate(i);
	NSAttributedString *shortcut = MacViewUtil::ToNSAttributedString(
	candidate.annotation().shortcut(),
	style_->text_styles(COLUMN_SHORTCUT));
	string value = candidate.value();
	if (candidate.annotation().has_prefix()) {
	value = candidate.annotation().prefix() + value;
	}
	if (candidate.annotation().has_suffix()) {
	value.append(candidate.annotation().suffix());
	}
	if (!value.empty()) {
	value.append(" ");
	}

	NSAttributedString *candidateValue = MacViewUtil::ToNSAttributedString(
	value, style_->text_styles(COLUMN_CANDIDATE));
	NSAttributedString *description = MacViewUtil::ToNSAttributedString(
	candidate.annotation().description(),
	style_->text_styles(COLUMN_DESCRIPTION));
	if ([shortcut length] > 0) {
	NSSize shortcutSize = MacViewUtil::applyTheme(
	[shortcut size], style_->text_styles(COLUMN_SHORTCUT));
	tableLayout_->EnsureCellSize(COLUMN_SHORTCUT,
	MacViewUtil::ToSize(shortcutSize));
	}
	if ([candidateValue length] > 0) {
	NSSize valueSize = MacViewUtil::applyTheme(
	[candidateValue size], style_->text_styles(COLUMN_CANDIDATE));
	tableLayout_->EnsureCellSize(COLUMN_CANDIDATE,
	MacViewUtil::ToSize(valueSize));
	}
	if ([description length] > 0) {
	NSSize descriptionSize = MacViewUtil::applyTheme(
	[description size], style_->text_styles(COLUMN_DESCRIPTION));
	tableLayout_->EnsureCellSize(COLUMN_DESCRIPTION,
	MacViewUtil::ToSize(descriptionSize));
	}

	[newCache addObject:[NSArray arrayWithObjects:shortcut, gap1,
	candidateValue, description, nil]];
	}

	tableLayout_->EnsureColumnsWidth(COLUMN_CANDIDATE, COLUMN_DESCRIPTION,
	g_column_minimum_width);

	candidateStringsCache_ = newCache;
	tableLayout_->FreezeLayout();
	[pool drain];
	return MacViewUtil::ToNSSize(tableLayout_->GetTotalSize());
	}

	- (void)drawRect:(NSRect)rect {
	if (!Category_IsValid(candidates_.category())) {
	LOG(WARNING) << "Unknown candidates category: " << candidates_.category();
	return;
	}

	for (int i = 0; i < candidates_.candidate_size(); ++i) {
	[self drawRow:i];
	}

	if (candidates_.candidate_size() < candidates_.size()) {
	[self drawVScrollBar];
	}
	[self drawFooter];

	// Draw the window border at last
	[MacViewUtil::ToNSColor(style_->border_color()) set];
	mozc::Size windowSize = tableLayout_->GetTotalSize();
	[NSBezierPath strokeRect:NSMakeRect(
	0.5, 0.5, windowSize.width - 1, windowSize.height - 1)];
	}

	#pragma mark drawing aux methods

	- (void)drawRow:(int)row {
	if (row == focusedRow_) {
	// Draw focused background
	NSRect focusedRect = MacViewUtil::ToNSRect(tableLayout_->GetRowRect(focusedRow_));
	[MacViewUtil::ToNSColor(style_->focused_background_color()) set];
	[NSBezierPath fillRect:focusedRect];
	[MacViewUtil::ToNSColor(style_->focused_border_color()) set];
	// Fix the border position. Because a line should be drawn at the
	// middle point of the pixel, origin should be shifted by 0.5 unit
	// and the size should be shrinked by 1.0 unit.
	focusedRect.origin.x += 0.5;
	focusedRect.origin.y += 0.5;
	focusedRect.size.width -= 1.0;
	focusedRect.size.height -= 1.0;
	[NSBezierPath strokeRect:focusedRect];
	} else {
	// Draw normal background
	for (int i = COLUMN_SHORTCUT; i < NUMBER_OF_COLUMNS; ++i) {
	mozc::Rect cellRect = tableLayout_->GetCellRect(row, i);
	if (cellRect.size.width > 0 && cellRect.size.height > 0 &&
	style_->text_styles(i).has_background_color()) {
	[MacViewUtil::ToNSColor(style_->text_styles(i).background_color()) set];
	[NSBezierPath fillRect:MacViewUtil::ToNSRect(cellRect)];
	}
	}
	}

	NSArray *candidate = [candidateStringsCache_ objectAtIndex:row];
	for (int i = COLUMN_SHORTCUT; i < NUMBER_OF_COLUMNS; ++i) {
	NSAttributedString *text = [candidate objectAtIndex:i];
	NSRect cellRect = MacViewUtil::ToNSRect(tableLayout_->GetCellRect(row, i));
	NSPoint &candidatePosition = cellRect.origin;
	// Adjust the positions
	candidatePosition.x += style_->text_styles(i).left_padding();
	candidatePosition.y += (cellRect.size.height - [text size].height) / 2;
	[text drawAtPoint:candidatePosition];
	}

	if (candidates_.candidate(row).has_information_id()) {
	NSRect rect = MacViewUtil::ToNSRect(tableLayout_->GetRowRect(row));
	[MacViewUtil::ToNSColor(style_->focused_border_color()) set];
	rect.origin.x += rect.size.width - 6.0;
	rect.size.width = 4.0;
	rect.origin.y += 2.0;
	rect.size.height -= 4.0;
	[NSBezierPath fillRect:rect];
	}
	}

	- (void)drawFooter {
	NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
	if (candidates_.has_footer()) {
	const mozc::commands::Footer &footer = candidates_.footer();
	NSRect footerRect = MacViewUtil::ToNSRect(tableLayout_->GetFooterRect());

	// Draw footer border
	for (int i = 0; i < style_->footer_border_colors_size(); ++i) {
	[MacViewUtil::ToNSColor(style_->footer_border_colors(i)) set];
	NSPoint fromPoint = NSMakePoint(footerRect.origin.x,
	footerRect.origin.y + 0.5);
	NSPoint toPoint = NSMakePoint(footerRect.origin.x + footerRect.size.width,
	footerRect.origin.y + 0.5);
	[NSBezierPath strokeLineFromPoint:fromPoint toPoint:toPoint];
	footerRect.origin.y += 1;
	}

	// Draw Footer background and data if necessary
	NSGradient *footerBackground =
	[[[NSGradient alloc]
	initWithStartingColor:MacViewUtil::ToNSColor(style_->footer_top_color())
	endingColor:MacViewUtil::ToNSColor(style_->footer_bottom_color())]
	autorelease];
	[footerBackground drawInRect:footerRect angle:90.0];

	// Draw logo
	if (footer.logo_visible() && g_LogoImage) {
	[g_LogoImage drawAtPoint:footerRect.origin
	fromRect:NSZeroRect /* means draw entire image */
	operation:NSCompositeSourceOver
	fraction:1.0 /* opacity */];
	NSSize logoSize = [g_LogoImage size];
	footerRect.origin.x += logoSize.width;
	footerRect.size.width -= logoSize.width;
	}

	// Draw label
	if (footer.has_label()) {
	NSAttributedString *footerLabel = MacViewUtil::ToNSAttributedString(
	footer.label(), style_->footer_style());
	footerRect.origin.x += style_->footer_style().left_padding();
	NSSize labelSize = [footerLabel size];
	NSPoint labelPosition = footerRect.origin;
	labelPosition.y += (footerRect.size.height - labelSize.height) / 2;
	[footerLabel drawAtPoint:labelPosition];
	}

	// Draw sub_label
	if (footer.has_sub_label()) {
	NSAttributedString *footerSubLabel = MacViewUtil::ToNSAttributedString(
	footer.sub_label(), style_->footer_sub_label_style());
	footerRect.origin.x += style_->footer_sub_label_style().left_padding();
	NSSize subLabelSize = [footerSubLabel size];
	NSPoint subLabelPosition = footerRect.origin;
	subLabelPosition.y += (footerRect.size.height - subLabelSize.height) / 2;
	[footerSubLabel drawAtPoint:subLabelPosition];
	}

	// Draw footer index (e.g. "10/120")
	if (footer.index_visible()) {
	int focusedIndex = candidates_.focused_index();
	int totalItems = candidates_.size();
	NSString *footerIndex =
	[NSString stringWithFormat:@"%d/%d", focusedIndex + 1, totalItems];
	NSAttributedString *footerAttributedIndex =
	MacViewUtil::ToNSAttributedString(
	[footerIndex UTF8String], style_->footer_style());
	NSSize footerSize = [footerAttributedIndex size];
	NSPoint footerPosition = footerRect.origin;
	footerPosition.x = footerPosition.x + footerRect.size.width -
	footerSize.width - style_->footer_style().right_padding();
	[footerAttributedIndex drawAtPoint:footerPosition];
	}
	}
	[pool drain];
	}

	- (void)drawVScrollBar {
	const mozc::Rect &vscrollRect = tableLayout_->GetVScrollBarRect();

	if (!vscrollRect.IsRectEmpty() && candidates_.candidate_size() > 0) {
	const int beginIndex = candidates_.candidate(0).index();
	const int candidatesTotal = candidates_.size();
	const int endIndex =
	candidates_.candidate(candidates_.candidate_size() - 1).index();

	[MacViewUtil::ToNSColor(style_->scrollbar_background_color()) set];
	[NSBezierPath fillRect:MacViewUtil::ToNSRect(vscrollRect)];

	const mozc::Rect &indicatorRect =
	tableLayout_->GetVScrollIndicatorRect(
	beginIndex, endIndex, candidatesTotal);
	[MacViewUtil::ToNSColor(style_->scrollbar_indicator_color()) set];
	[NSBezierPath fillRect:MacViewUtil::ToNSRect(indicatorRect)];
	}
	}

	#pragma mark event handling callbacks

	const char *Inspect(id obj) {
	return [[NSString stringWithFormat:@"%@", obj] UTF8String];
	}

	- (void)mouseDown:(NSEvent *)event {
	mozc::Point localPos = MacViewUtil::ToPoint(
	[self convertPoint:[event locationInWindow] fromView:nil]);
	int clickedRow = -1;
	for (int i = 0; i < tableLayout_->number_of_rows(); ++i) {
	mozc::Rect rowRect = tableLayout_->GetRowRect(i);
	if (rowRect.PtrInRect(localPos)) {
	clickedRow = i;
	break;
	}
	}

	if (clickedRow >= 0 && clickedRow != focusedRow_) {
	focusedRow_ = clickedRow;
	[self setNeedsDisplay:YES];
	}
	}

	- (void)mouseUp:(NSEvent *)event {
	mozc::Point localPos = MacViewUtil::ToPoint(
	[self convertPoint:[event locationInWindow] fromView:nil]);
	if (command_sender_ == NULL) {
	return;
	}
	if (candidates_.candidate_size() < tableLayout_->number_of_rows()) {
	return;
	}
	for (int i = 0; i < tableLayout_->number_of_rows(); ++i) {
	mozc::Rect rowRect = tableLayout_->GetRowRect(i);
	if (rowRect.PtrInRect(localPos)) {
	SessionCommand command;
	command.set_type(SessionCommand::SELECT_CANDIDATE);
	command.set_id(candidates_.candidate(i).id());
	Output dummy_output;
	command_sender_->SendCommand(command, &dummy_output);
	break;
	}
	}
	}

	- (void)mouseDragged:(NSEvent *)event {
	[self mouseDown:event];
	}
	@end