Salesforce: Pagination in Visualforce Page

Pagination on the Visualforce page:

//Created First,Next,Last,Previous button along with number of record count

 <apex:outputPanel rendered="{!taskTotalRecordCount>0}" layout="block" styleClass="pageblockIconBlock">
        <apex:commandButton styleClass="pageblockIconStyle" value="<<" status="pageLoading" rerender="resultTable" action="{!FirstPageCompletedTaskData}" disabled="{!preveviousdata}"/>
        <apex:commandButton styleClass="pageblockIconStyle" value="<" status="pageLoading" rerender="resultTable" action="{!PreviousPageCompletedTaskData}" disabled="{!preveviousdata}"/>       
        <apex:outputText style="padding-left:15px;padding:5px;" >&nbsp;&nbsp;{!(taskCompletedRecordOffsetSize+1)}-{!IF((taskCompletedRecordOffsetSize + taskCompletedRecordLimitSize)>taskTotalRecordCount, taskTotalRecordCount,(taskCompletedRecordOffsetSize + taskCompletedRecordLimitSize))} of <font class="orangeText">{!taskTotalRecordCount}</font></apex:outputText>       
        <apex:commandButton styleClass="pageblockIconStyle" value=">" status="pageLoading" rerender="resultTable" action="{!NextPageCompletedTaskData}" disabled="{!nextdata}"/>
        <apex:commandButton styleClass="pageblockIconStyle" value=">>" status="pageLoading" rerender="resultTable" action="{!LastPageCompletedTaskData}" disabled="{!nextdata}"/>
    </apex:outputPanel>

 

//Above buttons styling in the VF page

.pageblockIconBlock {
            background: #F1F0F0;
            height: 32px;
            padding-top: 3px;
            padding-left: 5px;
        }

        body .pageblockIconBlock input.btnDisabled, body .pageblockIconBlock .input.btnCancel {
            background: #AAAAAA !important;
        }

        .pageblockIconStyle {
            background: #F79328 !important;
            color: white !important;
            border: 0px !important;
            border-radius: 0px !important;
            width: 25px;
            height: 25px;

        }

 

//Apex class code to get the data with pagination

//First time this method will be executed to get the total number of record count and reset the values
public List<Account> accountList { get; set; }
public void pullthe AccountDetails() {
resetTheOffSetValues();
accountList = new List<Account>();
        taskTotalRecordCount = Database.countQuery('SELECT count() FROM Account');
pullMatchingAccountDetails();
}

public void pullMatchingAccountDetails() {
accountList = (List<Account>) Database.query('SELECT Id,Name FROM ACCOUNT ORDER By Name LIMIT :taskCompletedRecordLimitSize OFFSET :taskCompletedRecordOffsetSize');
}

//Initialize the values
    private void resetTheOffSetValues() {
        taskTotalRecordCount = 0;
        taskCompletedRecordOffsetSize = 0;
        taskCompletedRecordLimitSize = 10;  //Set the limit here to display the number of record in VF page
    }

//Initialize the record offset size
    public void FirstPageCompletedTaskData() {
        taskCompletedRecordOffsetSize = 0;
        pullMatchingAccountDetails();
    }
    //Initialize the privously viewed matching accounts record offset size
    public void PreviousPageCompletedTaskData() {
        taskCompletedRecordOffsetSize =taskCompletedRecordOffsetSize - taskCompletedRecordLimitSize;
        pullMatchingAccountDetails();
    }
    //Initialize the next viewed matching accounts record offset size
    public void NextPageCompletedTaskData() {
        taskCompletedRecordOffsetSize = taskCompletedRecordOffsetSize + taskCompletedRecordLimitSize;
        pullMatchingAccountDetails();
    }
    //Initialize the Last page matching accounts record offset size
    public void LastPageCompletedTaskData() {
        taskCompletedRecordOffsetSize =taskTotalRecordCount - math.mod(taskTotalRecordCount,taskCompletedRecordLimitSize);
        pullMatchingAccountDetails();
    }
    //Disable the Previous button on account matching list based on the record offset size.
    public boolean getpreveviousdata() {
        if(taskCompletedRecordOffsetSize == 0)
            return true;
        else
            return false;
    }
    //Disable the Next button on account matching list based on the conditions.
    public boolean getnextdata() {
        if((taskCompletedRecordOffsetSize + taskCompletedRecordLimitSize) > taskTotalRecordCount)
            return true;
        else
            return false;
    }