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{
* UDetailPageHTML.pas
*
* Heirachy of classes that generate dynamic HTML pages from HTML templates, for
* use in displaying detail view items. Also includes a factory class to create
* HTML generator objects.
*
* Originally named UHTMLGenerators.pas. Renamed as UDetailPageHTML.pas as of
* v2.0
*
* $Rev$
* $Date$
*
* ***** BEGIN LICENSE BLOCK *****
*
* Version: MPL 1.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
* the specific language governing rights and limitations under the License.
*
* The Original Code is UDetailPageHTML.pas
*
* The Initial Developer of the Original Code is Peter Johnson
* (http://www.delphidabbler.com/).
*
* Portions created by the Initial Developer are Copyright (C) 2005-2009 Peter
* Johnson. All Rights Reserved.
*
* Contributor(s)
* NONE
*
* ***** END LICENSE BLOCK *****
}
unit UDetailPageHTML;
interface
uses
// Delphi
Classes,
// Project
IntfCompilers, UHTMLTemplate, USnippets, UView;
type
{
TDetailPageHTML:
Abstract base class for classes that generate body HTML displayed in detail
views.
}
TDetailPageHTML = class abstract(TObject)
strict private
fView: TViewItem; // Value of View property
strict protected
property View: TViewItem read fView;
{Reference to object providing information about item to be viewed}
public
constructor Create(const View: TViewItem); virtual;
{Class constructor. Sets up object for a view item.
@param View [in] Provides information about item to be displayed.
}
procedure Generate(const Stm: TStream); virtual; abstract;
{Generates required body HTML and writes to stream.
@param Stm [in] Stream that received HTML body.
}
end;
{
TDetailPageTpltHTML:
Abstract base class for classes that generate HTML by updating a template
stored in resources.
}
TDetailPageTpltHTML = class abstract(TDetailPageHTML)
strict protected
function GetTemplateResName: string; virtual; abstract;
{Gets the name of the HTML template resource.
@return Name of template resource.
}
procedure ResolvePlaceholders(const Tplt: THTMLTemplate); virtual; abstract;
{Resolves the placeholders in the HTML template.
@param Tplt [in] Reference to HTML template object that encapsulates the
template.
}
public
procedure Generate(const Stm: TStream); override;
{Generates the required body HTML from a HTML template and writes to a
stream.
@param Stm [in] Stream to receive generated HTML.
}
end;
{
TNulPageHTML:
Nul class called if blank HTML pages is required. Does nothing since blank
HTML page has no body contents.
}
TNulPageHTML = class sealed(TDetailPageHTML)
public
procedure Generate(const Stm: TStream); override;
{Generates body content for nul document. Does nothing.
@param Stm [in] Not used.
}
end;
{
TWelcomePageHTML:
Class that generates the welcome page from a template stored in resources.
}
TWelcomePageHTML = class sealed(TDetailPageTpltHTML)
strict protected
function GetTemplateResName: string; override;
{Gets the name of the HTML template resource.
@return Name of template resource.
}
procedure ResolvePlaceholders(const Tplt: THTMLTemplate); override;
{Resolves the placeholders in the HTML template.
@param Tplt [in] Reference to HTML template object that encapsulates the
template.
}
end;
{
TRoutinePageHTML:
Abstract base class for classes that generate HTML for pages that describe
a snippet.
}
TRoutinePageHTML = class abstract(TDetailPageTpltHTML)
strict private
fCompilersInfo: ICompilers; // Provides information about compilers
strict protected
function GetTemplateResName: string; override; abstract;
{Gets the name of the HTML template resource.
@return Name of template resource.
}
procedure ResolvePlaceholders(const Tplt: THTMLTemplate); override;
{Resolves the placeholders in the HTML template.
@param Tplt [in] Reference to HTML template object that encapsulates the
template.
}
function GetRoutine: TRoutine;
{Gets reference to snippet from View property.
@return Required snippet reference.
}
property CompilersInfo: ICompilers read fCompilersInfo;
{Provides information to sub classes about compilers}
public
constructor Create(const View: TViewItem); override;
{Class constructor. Sets up object for a view item.
@param View [in] Provides information about snippet to be displayed.
}
end;
{
TRoutineInfoPageHTML:
Class that generates information about a snippet displayed in information
pane. Uses a template stored in resources.
}
TRoutineInfoPageHTML = class sealed(TRoutinePageHTML)
strict protected
function GetTemplateResName: string; override;
{Gets the name of the HTML template resource.
@return Name of template resource.
}
procedure ResolvePlaceholders(const Tplt: THTMLTemplate); override;
{Resolves the placeholders in the HTML template.
@param Tplt [in] Reference to HTML template object that encapsulates the
template.
}
end;
{
TRoutineCompCheckPageHTML:
Class that generates information about a snippet displayed in compiler check
pane. Uses a template stored in resources.
}
TRoutineCompCheckPageHTML = class sealed(TRoutinePageHTML)
strict protected
function GetTemplateResName: string; override;
{Gets the name of the HTML template resource.
@return Name of template resource.
}
procedure ResolvePlaceholders(const Tplt: THTMLTemplate); override;
{Resolves the placeholders in the HTML template.
@param Tplt [in] Reference to HTML template object that encapsulates the
template.
}
end;
{
TRoutinePageHTML:
Abstract base class for classes that generate HTML for pages that display a
list of snippets.
}
TRoutineListPageHTML = class abstract(TDetailPageTpltHTML)
strict private
fRoutines: TRoutineList; // List of snippets to be displayed
strict protected
function RoutineTableInner: string;
{Builds a sequence of table rows each containing a link to the snippet
along with its description.
@return Required table rows.
}
function RoutineTableRow(const Routine: TRoutine): string;
{Builds a table row containing cells with a link to a snippet and a
description of the snippet.
@param Routine [in] Snippet to be included in row.
@return Required table row.
}
procedure BuildRoutineList; virtual; abstract;
{Stores all snippets to be displayed in Routines property.
}
property Routines: TRoutineList read fRoutines;
{List of all snippets to be displayed}
function GetTemplateResName: string; override;
{Gets the name of the HTML template resource.
@return Name of template resource.
}
procedure ResolvePlaceholders(const Tplt: THTMLTemplate); override;
abstract;
{Resolves the placeholders in the HTML template.
@param Tplt [in] Reference to HTML template object that encapsulates the
template.
}
function HaveSnippets: Boolean;
{Checks if there are snippets in list.
@return True if there are snippets in list, False if not.
}
public
constructor Create(const View: TViewItem); override;
{Class constructor. Sets up object for a view item.
@param View [in] Provides information about item to be displayed.
}
destructor Destroy; override;
{Class destructor. Tidies up object.
}
end;
{
TCategoryPageHTML:
Class that displays routines contained in a category. Uses a template stored
in resources.
}
TCategoryPageHTML = class sealed(TRoutineListPageHTML)
strict protected
procedure ResolvePlaceholders(const Tplt: THTMLTemplate); override;
{Resolves the placeholders in the HTML template.
@param Tplt [in] Reference to HTML template object that encapsulates the
template.
}
procedure BuildRoutineList; override;
{Stores all snippets to be displayed in Routines property.
}
end;
{
TAlphaListPageHTML:
Class that displays all snippets that have same initial letter. Uses a
template stored in resources.
}
TAlphaListPageHTML = class sealed(TRoutineListPageHTML)
strict protected
procedure ResolvePlaceholders(const Tplt: THTMLTemplate); override;
{Resolves the placeholders in the HTML template.
@param Tplt [in] Reference to HTML template object that encapsulates the
template.
}
procedure BuildRoutineList; override;
{Stores all snippets to be displayed in Routines property.
}
end;
{
TSnipKindPageHTML:
Class that displays all snippets that are of same kind. Uses a template
stored in resources.
}
TSnipKindPageHTML = class sealed(TRoutineListPageHTML)
strict protected
procedure ResolvePlaceholders(const Tplt: THTMLTemplate); override;
{Resolves the placeholders in the HTML template.
@param Tplt [in] Reference to HTML template object that encapsulates the
template.
}
procedure BuildRoutineList; override;
{Stores all snippets to be displayed in Routines property.
}
end;
{
TNoCompCheckPageHTML:
Class that generates HTML that indicates that compiler checks are not
available for selected view item. Displays body HTML stored in resources.
}
TNoCompCheckPageHTML = class sealed(TDetailPageHTML)
public
procedure Generate(const Stm: TStream); override;
{Generates HTML body content for "No compiler check available" pages.
@param Stm [in] Stream that receives body HTML.
}
end;
implementation
uses
// Delphi
SysUtils,
// Project
UCompilers, UCompResHTML, UConsts, UCSSUtils, UHTMLUtils, UHTMLDetailUtils,
UJavaScriptUtils, UQuery, URoutineHTML, UUtils;
{ TDetailPageHTML }
constructor TDetailPageHTML.Create(const View: TViewItem);
{Class constructor. Sets up object for a view item.
@param View [in] Provides information about item to be displayed.
}
begin
Assert(Assigned(View), ClassName + '.Create: View is nil');
inherited Create;
fView := View;
end;
{ TDetailPageTpltHTML }
procedure TDetailPageTpltHTML.Generate(const Stm: TStream);
{Generates the required body HTML from a HTML template and writes to a stream.
@param Stm [in] Stream to receive generated HTML.
}
var
Tplt: THTMLTemplate; // encapsulates HTML template
begin
// Create template object from required HTML template resource
Tplt := THTMLTemplate.Create(HInstance, GetTemplateResName);
try
// Resolve all placeholders and write resulting HTML to stream
ResolvePlaceholders(Tplt);
Tplt.SaveToStream(Stm);
finally
Tplt.Free;
end;
end;
{ TNulPageHTML }
procedure TNulPageHTML.Generate(const Stm: TStream);
{Generates body content for nul document. Does nothing.
@param Stm [in] Not used.
}
begin
// do nothing
end;
{ TWelcomePageHTML }
function TWelcomePageHTML.GetTemplateResName: string;
{Gets the name of the HTML template resource.
@return Name of template resource.
}
begin
Result := 'welcome-tplt.html';
end;
procedure TWelcomePageHTML.ResolvePlaceholders(const Tplt: THTMLTemplate);
{Resolves the placeholders in the HTML template.
@param Tplt [in] Reference to HTML template object that encapsulates the
template.
}
var
HaveMainDB: Boolean; // flag indicating if main database is available
HaveUserDB: Boolean; // flag indicating if user database has entries
begin
HaveMainDB := Snippets.Routines.Count(False) > 0;
HaveUserDB := Snippets.Routines.Count(True) > 0;
Tplt.ResolvePlaceholderHTML(
'NoUserDB', CSSBlockDisplayProp(not HaveUserDB)
);
Tplt.ResolvePlaceholderHTML(
'NoMainDB', CSSBlockDisplayProp(not HaveMainDB)
);
Tplt.ResolvePlaceholderHTML(
'Intro', CSSBlockDisplayProp(HaveMainDB or HaveUserDB)
);
Tplt.ResolvePlaceholderHTML(
'Disclaimer', CSSBlockDisplayProp(HaveMainDB)
);
Tplt.ResolvePlaceholderHTML(
'UpdateDB', CSSBlockDisplayProp(HaveMainDB)
);
Tplt.ResolvePlaceholderHTML(
'DownloadDB', CSSBlockDisplayProp(not HaveMainDB)
);
end;
{ TRoutinePageHTML }
constructor TRoutinePageHTML.Create(const View: TViewItem);
{Class constructor. Sets up object for a view item.
@param View [in] Provides information about snippet to be displayed.
}
begin
inherited;
// create compilers info object
fCompilersInfo := TCompilersFactory.CreateAndLoadCompilers;
end;
function TRoutinePageHTML.GetRoutine: TRoutine;
{Gets reference to snippet from View property.
@return Required snippet reference.
}
begin
Assert(View.Kind = vkRoutine, ClassName + '.GetRoutine: View is not snippet');
Result := View.Routine;
end;
procedure TRoutinePageHTML.ResolvePlaceholders(const Tplt: THTMLTemplate);
{Resolves the placeholders in the HTML template.
@param Tplt [in] Reference to HTML template object that encapsulates the
template.
}
var
RoutineHTML: TRoutineHTML; // object used to generate HTML
begin
// Resolve placeholders common to all snippet templates
// snippet name and class
if GetRoutine.UserDefined then
Tplt.ResolvePlaceholderHTML('RoutineCSSClass', 'userdb')
else
Tplt.ResolvePlaceholderHTML('RoutineCSSClass', 'maindb');
RoutineHTML := TRoutineHTML.Create(GetRoutine);
try
Tplt.ResolvePlaceholderHTML('RoutineName', RoutineHTML.RoutineName);
finally
FreeAndNil(RoutineHTML);
end;
// "edit snippet" link for user-defined snippets
Tplt.ResolvePlaceholderHTML(
'EditLink', CSSBlockDisplayProp(GetRoutine.UserDefined)
);
Tplt.ResolvePlaceholderText(
'EditEventHandler', JSLiteralFunc('editRoutine', [GetRoutine.Name])
);
end;
{ TRoutineInfoPageHTML }
function TRoutineInfoPageHTML.GetTemplateResName: string;
{Gets the name of the HTML template resource.
@return Name of template resource.
}
begin
Result := 'info-snippet-tplt.html';
end;
procedure TRoutineInfoPageHTML.ResolvePlaceholders(const Tplt: THTMLTemplate);
{Resolves the placeholders in the HTML template.
@param Tplt [in] Reference to HTML template object that encapsulates the
template.
}
// ---------------------------------------------------------------------------
function CompilerTableInner: string;
{Generates inner HTML (rows) of compiler table.
@return Required HTML.
}
var
Compiler: ICompiler; // reference to each compiler
Row1, Row2: string; // HTML for two rows in HTML table
begin
// Initialise HTML for two rows of table and resulting table HTML
Row1 := MakeTag('tr', ttOpen);
Row2 := MakeTag('tr', ttOpen);
Result := '';
// Loop thru each supported compiler
for Compiler in CompilersInfo do
begin
// Add table cell for compiler name to 1st row of table
Row1 := Row1 + TInfoCompResHTML.NameCell(Compiler) + EOL;
// Add table cell containing required LED image to 2nd row of table
Row2 := Row2
+ TInfoCompResHTML.ResultCell(GetRoutine.Compatibility[Compiler.GetID])
+ EOL;
end;
// Close the two rows
Row1 := Row1 + MakeTag('tr', ttClose);
Row2 := Row2 + MakeTag('tr', ttClose);
// Return HTML of two rows
Result := Row1 + Row2;
end;
// ---------------------------------------------------------------------------
var
InfoHTML: TInfoHTML; // object used to generate HTML
begin
inherited;
InfoHTML := TInfoHTML.Create(GetRoutine);
try
Tplt.ResolvePlaceholderHTML('Kind', InfoHTML.SnippetKind);
Tplt.ResolvePlaceholderHTML('Category', InfoHTML.Category);
Tplt.ResolvePlaceholderHTML('Description', InfoHTML.RoutineDesc);
Tplt.ResolvePlaceholderHTML('SourceCode', InfoHTML.SourceCode);
Tplt.ResolvePlaceholderHTML('Units', InfoHTML.Units);
Tplt.ResolvePlaceholderHTML('Depends', InfoHTML.Depends);
Tplt.ResolvePlaceholderHTML('XRefs', InfoHTML.XRefs);
Tplt.ResolvePlaceholderHTML('CompilerTableRows', CompilerTableInner);
Tplt.ResolvePlaceholderHTML('Extra', InfoHTML.Extra);
Tplt.ResolvePlaceholderHTML(
'ShowCompilations', CSSBlockDisplayProp(GetRoutine.CanCompile)
);
finally
FreeAndNil(InfoHTML);
end;
end;
{ TRoutineCompCheckPageHTML }
function TRoutineCompCheckPageHTML.GetTemplateResName: string;
{Gets the name of the HTML template resource.
@return Name of template resource.
}
begin
if CompilersInfo.AvailableCount = 0 then
Result := 'comp-nocompilers-tplt.html'
else if GetRoutine.CanCompile then
Result := 'comp-snippet-tplt.html'
else
Result := 'comp-freeform-tplt.html';
end;
procedure TRoutineCompCheckPageHTML.ResolvePlaceholders(
const Tplt: THTMLTemplate);
{Resolves the placeholders in the HTML template.
@param Tplt [in] Reference to HTML template object that encapsulates the
template.
}
// ---------------------------------------------------------------------------
function CompilerTableInner: string;
{Generates inner HTML (rows) of compiler table.
@return Required HTML.
}
var
Compiler: ICompiler; // reference to each compiler
begin
Result := '';
for Compiler in CompilersInfo do
begin
// Add table row for each supported compiler
Result := Result
+ MakeTag('tr', ttOpen)
+ EOL
+ TCompCheckResHTML.NameCell(Compiler)
+ EOL
+ TCompCheckResHTML.ResultCell(GetRoutine.Compatibility[Compiler.GetID])
+ EOL
+ TCompCheckResHTML.TestCellPlaceholder(Compiler)
+ EOL
+ TCompCheckResHTML.ErrCellPlaceholder(Compiler)
+ EOL
+ MakeTag('tr', ttClose)
+ EOL;
end;
end;
// ---------------------------------------------------------------------------
begin
inherited;
if GetRoutine.CanCompile and (CompilersInfo.AvailableCount > 0) then
// This placeholder occurs only in the template used for compilable snippets
Tplt.ResolvePlaceholderHTML(
'CompilerInfo', CompilerTableInner
);
end;
{ TRoutineListPageHTML }
constructor TRoutineListPageHTML.Create(const View: TViewItem);
{Class constructor. Sets up object for a view item.
@param View [in] Provides information about item to be displayed.
}
begin
inherited;
// Create list of all snippets to be displayed
fRoutines := TRoutineList.Create;
BuildRoutineList;
end;
destructor TRoutineListPageHTML.Destroy;
{Class destructor. Tidies up object.
}
begin
FreeAndNil(fRoutines);
inherited;
end;
function TRoutineListPageHTML.GetTemplateResName: string;
begin
if HaveSnippets then
Result := 'info-snippet-list-tplt.html'
else
Result := 'info-empty-selection-tplt.html';
end;
function TRoutineListPageHTML.HaveSnippets: Boolean;
{Checks if there are snippets in list.
@return True if there are snippets in list, False if not.
}
begin
Result := Routines.Count > 0;
end;
function TRoutineListPageHTML.RoutineTableInner: string;
{Builds a sequence of table rows each containing a link to the snippet
along with its description.
@return Required table rows.
}
var
Snippet: TRoutine; // references each snippet in list
begin
Result := '';
for Snippet in Routines do
Result := Result + RoutineTableRow(Snippet);
end;
function TRoutineListPageHTML.RoutineTableRow(const Routine: TRoutine): string;
{Builds a table row containing cells with a link to a snippet and a
description of the snippet.
@param Routine [in] Snippet to be included in row.
@return Required table row.
}
begin
Result := MakeCompoundTag(
'tr',
MakeCompoundTag(
'td', RoutineALink(Routine.Name, Routine.UserDefined)
)
+ MakeCompoundTag(
'td', MakeSafeHTMLText(Routine.Description)
)
)
end;
{ TCategoryPageHTML }
procedure TCategoryPageHTML.BuildRoutineList;
{Stores all snippets to be displayed in Routines property.
}
begin
Query.GetCatSelection(View.Category, Routines);
end;
procedure TCategoryPageHTML.ResolvePlaceholders(const Tplt: THTMLTemplate);
{Resolves the placeholders in the HTML template.
@param Tplt [in] Reference to HTML template object that encapsulates the
template.
}
// ---------------------------------------------------------------------------
function H1ClassName: string;
{Gets CSS class name used in H1 heading.
@return Required name. Depends on whether category is user defined.
}
begin
if View.Category.UserDefined then
Result := 'userdb'
else
Result := 'maindb';
end;
// ---------------------------------------------------------------------------
resourcestring
sNarrative = 'List of selected snippets in this category.';
sNote = 'The current selection contains no snippets in this category.';
begin
Tplt.ResolvePlaceholderHTML('H1Class', H1ClassName);
Tplt.ResolvePlaceholderText('Heading', View.Category.Description);
if HaveSnippets then
begin
Tplt.ResolvePlaceholderText('Narrative', sNarrative);
Tplt.ResolvePlaceholderHTML('Routines', RoutineTableInner);
end
else
Tplt.ResolvePlaceholderText('Note', sNote);
end;
{ TAlphaListPageHTML }
procedure TAlphaListPageHTML.BuildRoutineList;
{Stores all snippets to be displayed in Routines property.
}
var
Snippet: TRoutine;
begin
Routines.Clear;
for Snippet in Query.Selection do
begin
if Snippet.Name[1] = View.AlphaChar.Letter then
Routines.Add(Snippet);
end;
end;
procedure TAlphaListPageHTML.ResolvePlaceholders(const Tplt: THTMLTemplate);
{Resolves the placeholders in the HTML template.
@param Tplt [in] Reference to HTML template object that encapsulates the
template.
}
resourcestring
sNarrative = 'List of selected snippets beginning with the letter %s.';
sNote = 'The are no snippets in the current selection that begin with the '
+ 'letter %s.';
begin
Tplt.ResolvePlaceholderHTML('H1Class', 'maindb');
Tplt.ResolvePlaceholderText('Heading', View.AlphaChar.Letter);
if HaveSnippets then
begin
Tplt.ResolvePlaceholderText(
'Narrative', Format(sNarrative, [View.AlphaChar.Letter])
);
Tplt.ResolvePlaceholderHTML('Routines', RoutineTableInner);
end
else
Tplt.ResolvePlaceholderText('Note', Format(sNote, [View.AlphaChar.Letter]));
end;
{ TSnipKindPageHTML }
procedure TSnipKindPageHTML.BuildRoutineList;
{Stores all snippets to be displayed in Routines property.
}
var
Snippet: TRoutine;
begin
Routines.Clear;
for Snippet in Query.Selection do
begin
if Snippet.Kind = View.SnippetKind.Kind then
Routines.Add(Snippet);
end;
end;
procedure TSnipKindPageHTML.ResolvePlaceholders(const Tplt: THTMLTemplate);
{Resolves the placeholders in the HTML template.
@param Tplt [in] Reference to HTML template object that encapsulates the
template.
}
resourcestring
sHeading = '%s Snippets';
sNarrative = 'List of all %s snippets in the current selection.';
sNote = 'There are no %s snippets in the current selection.';
begin
Tplt.ResolvePlaceholderHTML('H1Class', 'maindb');
Tplt.ResolvePlaceholderText(
'Heading', Format(sHeading, [View.SnippetKind.Description])
);
if HaveSnippets then
begin
Tplt.ResolvePlaceholderText(
'Narrative',
Format(sNarrative, [AnsiLowerCase(View.SnippetKind.Description)])
);
Tplt.ResolvePlaceholderHTML('Routines', RoutineTableInner);
end
else
Tplt.ResolvePlaceholderText(
'Note', Format(sNote, [AnsiLowerCase(View.SnippetKind.Description)])
);
end;
{ TNoCompCheckPageHTML }
procedure TNoCompCheckPageHTML.Generate(const Stm: TStream);
{Generates HTML body content for "No compiler check available" pages.
@param Stm [in] Stream that receives body HTML.
}
var
RS: TResourceStream; // stream used to access HTML template resource
begin
RS := TResourceStream.Create(HInstance, 'nocompcheck-body.html', RT_HTML);
try
Stm.CopyFrom(RS, 0); // copy whole stream
finally
RS.Free;
end;
end;
end.
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